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--- libmalloc/libmalloc-374.120.1/src/malloc.c
+++ libmalloc/libmalloc-67.40.1/src/malloc.c
@@ -21,22 +21,78 @@
* @APPLE_LICENSE_HEADER_END@
*/
-#include "internal.h"
-
-#if TARGET_OS_IPHONE
-// malloc_report(ASL_LEVEL_INFO...) on iOS doesn't show up in the Xcode Console log of the device,
+#include "magmallocProvider.h"
+
+#include <_simple.h>
+#include <crt_externs.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <libkern/OSAtomic.h>
+#include <mach/mach_vm.h>
+#include <mach/mach_init.h>
+#include <mach/thread_switch.h>
+#include <mach/vm_map.h>
+#include <mach-o/dyld.h>
+#include <os/tsd.h>
+#include <sys/mman.h>
+#include <xlocale.h>
+#include <TargetConditionals.h>
+
+#include "malloc.h"
+#include "malloc_printf.h"
+#include "scalable_malloc.h"
+#include "malloc_internal.h"
+#include "stack_logging.h"
+
+#if TARGET_OS_EMBEDDED || TARGET_IPHONE_SIMULATOR
+// _malloc_printf(ASL_LEVEL_INFO...) on iOS doesn't show up in the Xcode Console log of the device,
// but ASL_LEVEL_NOTICE does. So raising the log level is helpful.
#undef ASL_LEVEL_INFO
#define ASL_LEVEL_INFO ASL_LEVEL_NOTICE
-#endif // TARGET_OS_IPHONE
-
-#define USE_SLEEP_RATHER_THAN_ABORT 0
+#endif
+
+#include <CrashReporterClient.h>
+
+#ifdef __LP64__
+#define CONFIG_NANOZONE 1
+#else
+#define CONFIG_NANOZONE 0
+#endif
+
+/*
+ * MALLOC_ABSOLUTE_MAX_SIZE - There are many instances of addition to a
+ * user-specified size_t, which can cause overflow (and subsequent crashes)
+ * for values near SIZE_T_MAX. Rather than add extra "if" checks everywhere
+ * this occurs, it is easier to just set an absolute maximum request size,
+ * and immediately return an error if the requested size exceeds this maximum.
+ * Of course, values less than this absolute max can fail later if the value
+ * is still too large for the available memory. The largest value added
+ * seems to be PAGE_SIZE (in the macro round_page()), so to be safe, we set
+ * the maximum to be 2 * PAGE_SIZE less than SIZE_T_MAX.
+ */
+#define MALLOC_ABSOLUTE_MAX_SIZE (SIZE_T_MAX - (2 * PAGE_SIZE))
+
+#define USE_SLEEP_RATHER_THAN_ABORT 0
+
+typedef void (malloc_logger_t)(uint32_t type, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t result, uint32_t num_hot_frames_to_skip);
+
+extern malloc_logger_t *__syscall_logger; // use this to set up syscall logging (e.g., vm_allocate, vm_deallocate, mmap, munmap)
+
+extern void __prepare_to_log_stacks(void);
static _malloc_lock_s _malloc_lock = _MALLOC_LOCK_INIT;
-#define MALLOC_LOCK() _malloc_lock_lock(&_malloc_lock)
-#define MALLOC_TRY_LOCK() _malloc_lock_trylock(&_malloc_lock)
-#define MALLOC_UNLOCK() _malloc_lock_unlock(&_malloc_lock)
-#define MALLOC_REINIT_LOCK() _malloc_lock_init(&_malloc_lock)
+#define MALLOC_LOCK() _malloc_lock_lock(&_malloc_lock)
+#define MALLOC_UNLOCK() _malloc_lock_unlock(&_malloc_lock)
+
+static inline void yield(void) {
+ thread_switch(MACH_PORT_NULL, SWITCH_OPTION_DEPRESS, 1);
+}
/* The following variables are exported for the benefit of performance tools
*
@@ -47,121 +103,53 @@
*/
int32_t malloc_num_zones = 0;
int32_t malloc_num_zones_allocated = 0;
-malloc_zone_t **malloc_zones = (malloc_zone_t **)0xdeaddeaddeaddead;
+malloc_zone_t **malloc_zones = 0;
malloc_logger_t *malloc_logger = NULL;
-static uint32_t initial_num_zones;
-static malloc_zone_t *initial_scalable_zone;
-static malloc_zone_t *initial_nano_zone;
-static bool has_injected_zone0;
-
unsigned malloc_debug_flags = 0;
-bool malloc_tracing_enabled = false;
-bool malloc_space_efficient_enabled = false;
-bool malloc_medium_space_efficient_enabled = true;
-
-bool malloc_quarantine_enabled = false;
unsigned malloc_check_start = 0; // 0 means don't check
unsigned malloc_check_counter = 0;
unsigned malloc_check_each = 1000;
+/* global flag to suppress ASL logging e.g. for syslogd */
+int _malloc_no_asl_log = 0;
+
static int malloc_check_sleep = 100; // default 100 second sleep
-static int malloc_check_abort = 0; // default is to sleep, not abort
-
-static struct _malloc_msl_symbols msl = {};
-
-// TODO delete this, its only used some deprecated functions like turn_on_stack_logging,
-// which have been replaced by functions in MallocStackLogging.framework
-// (like msl_turn_on_stack_logging)
-static struct msl_dylib {
-
- void *dylib;
-
- kern_return_t (*get_frames_for_address)(task_t task,
- mach_vm_address_t address,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count);
-
- uint64_t (*stackid_for_vm_region) (task_t task, mach_vm_address_t address);
-
- kern_return_t (*get_frames_for_stackid) (task_t task,
- uint64_t stack_identifier,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count,
- bool *last_frame_is_threadid);
-
-
- kern_return_t (*uniquing_table_read_stack) (struct backtrace_uniquing_table *uniquing_table,
- uint64_t stackid,
- mach_vm_address_t *out_frames_buffer,
- uint32_t *out_frames_count,
- uint32_t max_frames);
-} msld = {};
+static int malloc_check_abort = 0; // default is to sleep, not abort
+
+static int malloc_debug_file = STDERR_FILENO;
+static boolean_t _malloc_is_initialized = FALSE;
+
+static const char Malloc_Facility[] = "com.apple.Libsystem.malloc";
/*
* Counters that coordinate zone destruction (in malloc_zone_unregister) with
* find_registered_zone (here abbreviated as FRZ).
*/
-static int32_t volatile counterAlice = 0, counterBob = 0;
-static int32_t volatile * volatile pFRZCounterLive = &counterAlice;
-static int32_t volatile * volatile pFRZCounterDrain = &counterBob;
-
-unsigned int _os_cpu_number_override = -1;
-
-static inline malloc_zone_t *inline_malloc_default_zone(void) __attribute__((always_inline));
-
-#define MALLOC_LOG_TYPE_ALLOCATE stack_logging_type_alloc
-#define MALLOC_LOG_TYPE_DEALLOCATE stack_logging_type_dealloc
-#define MALLOC_LOG_TYPE_HAS_ZONE stack_logging_flag_zone
-#define MALLOC_LOG_TYPE_CLEARED stack_logging_flag_cleared
+static int counterAlice = 0, counterBob = 0;
+static int *pFRZCounterLive= &counterAlice, *pFRZCounterDrain = &counterBob;
+
+#define MALLOC_LOG_TYPE_ALLOCATE stack_logging_type_alloc
+#define MALLOC_LOG_TYPE_DEALLOCATE stack_logging_type_dealloc
+#define MALLOC_LOG_TYPE_HAS_ZONE stack_logging_flag_zone
+#define MALLOC_LOG_TYPE_CLEARED stack_logging_flag_cleared
#define DEFAULT_MALLOC_ZONE_STRING "DefaultMallocZone"
#define DEFAULT_PUREGEABLE_ZONE_STRING "DefaultPurgeableMallocZone"
+
+boolean_t malloc_engaged_nano(void);
+#if CONFIG_NANOZONE
+extern boolean_t _malloc_engaged_nano;
+malloc_zone_t *create_nano_zone(size_t initial_size, malloc_zone_t *helper_zone, unsigned debug_flags);
+void nano_forked_zone(malloc_zone_t *zone);
#define MALLOC_HELPER_ZONE_STRING "MallocHelperZone"
-
-MALLOC_NOEXPORT
-unsigned int phys_ncpus;
-
-MALLOC_NOEXPORT
-unsigned int logical_ncpus;
-
-MALLOC_NOEXPORT
-unsigned int hyper_shift;
-
-// Boot argument for max magazine control
-static const char max_magazines_boot_arg[] = "malloc_max_magazines";
-
-static const char large_expanded_cache_threshold_boot_arg[] = "malloc_large_expanded_cache_threshold";
-
-#if CONFIG_MEDIUM_ALLOCATOR
-static const char medium_enabled_boot_arg[] = "malloc_medium_zone";
-static const char max_medium_magazines_boot_arg[] = "malloc_max_medium_magazines";
-static const char medium_activation_threshold_boot_arg[] = "malloc_medium_activation_threshold";
-static const char medium_space_efficient_boot_arg[] = "malloc_medium_space_efficient";
-static const char medium_madvise_dram_scale_divisor_boot_arg[] = "malloc_medium_madvise_dram_scale_divisor";
-#endif // CONFIG_MEDIUM_ALLOCATOR
+#endif
/********* Utilities ************/
-static bool _malloc_entropy_initialized;
-
-#if !TARGET_OS_DRIVERKIT
-#include <dlfcn.h>
-
-typedef void * (*dlopen_t) (const char * __path, int __mode);
-typedef void * (*dlsym_t) (void * __handle, const char * __symbol);
-
-static dlopen_t _dlopen = NULL;
-static dlsym_t _dlsym = NULL;
-#else
-#define _dlopen(...) NULL
-#define _dlsym(...) NULL
-#endif // TARGET_OS_DRIVERKIT
+__attribute__((visibility("hidden"))) uint64_t malloc_entropy[2] = {0, 0};
void __malloc_init(const char *apple[]);
-static void _malloc_initialize(const char *apple[], const char *bootargs);
static int
__entropy_from_kernel(const char *str)
@@ -172,553 +160,87 @@
/* Skip over key to the first value */
str = strchr(str, '=');
- if (str == NULL) {
+ if (str == NULL)
return 0;
- }
str++;
- while (str && idx < sizeof(malloc_entropy) / sizeof(malloc_entropy[0])) {
+ while (str && idx < sizeof(malloc_entropy)/sizeof(malloc_entropy[0])) {
strlcpy(tmp, str, 20);
p = strchr(tmp, ',');
- if (p) {
- *p = '\0';
- }
+ if (p) *p = '\0';
val = strtoull_l(tmp, NULL, 0, NULL);
malloc_entropy[idx] = (uint64_t)val;
idx++;
- if ((str = strchr(str, ',')) != NULL) {
+ if ((str = strchr(str, ',')) != NULL)
str++;
- }
}
return idx;
}
-#if TARGET_OS_OSX && defined(__x86_64__)
-static uint64_t
-__is_translated(void)
-{
- return (*(uint64_t*)_COMM_PAGE_CPU_CAPABILITIES64) & kIsTranslated;
-}
-#endif /* TARGET_OS_OSX */
-
-
-#define LIBMALLOC_EXPERIMENT_FACTORS_KEY "MallocExperiment="
-#define LIBMALLOC_EXPERIMENT_DISABLE_MEDIUM (1ULL)
-static void
-__malloc_init_experiments(const char *str)
-{
- uint64_t experiment_factors = 0;
- str = strchr(str, '=');
- if (str) {
- experiment_factors = strtoull_l(str + 1, NULL, 16, NULL);
- }
- switch (experiment_factors) {
- case LIBMALLOC_EXPERIMENT_DISABLE_MEDIUM:
- magazine_medium_enabled = false;
- break;
- }
-}
-
-static void
-__malloc_init_from_bootargs(const char *bootargs)
-{
- // The maximum number of magazines can be set either via a
- // boot argument or from the environment. Get the boot argument value
- // here and store it. We can't bounds check it until we have phys_ncpus,
- // which happens later in _malloc_initialize(), along with handling
- // of the environment value setting.
- char value_buf[256];
- const char *flag = malloc_common_value_for_key_copy(bootargs,
- max_magazines_boot_arg, value_buf, sizeof(value_buf));
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && value >= 0) {
- max_magazines = (unsigned int)value;
- } else {
- malloc_report(ASL_LEVEL_ERR,
- "malloc_max_magazines must be positive - ignored.\n");
- }
- }
-
- flag = malloc_common_value_for_key_copy(bootargs,
- large_expanded_cache_threshold_boot_arg, value_buf, sizeof(value_buf));
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && value >= 0) {
- magazine_large_expanded_cache_threshold = (unsigned int)value;
- } else {
- malloc_report(ASL_LEVEL_ERR,
- "malloc_large_expanded_cache_threshold must be positive - ignored.\n");
- }
- }
-
-#if CONFIG_MEDIUM_ALLOCATOR
-#if TARGET_OS_OSX
-#if defined(__x86_64__)
- if (__is_translated()) {
- magazine_medium_active_threshold = 0;
- }
-#elif defined(__arm64__)
- magazine_medium_active_threshold = 0;
-#endif
-#endif /* TARGET_OS_OSX */
-
- flag = malloc_common_value_for_key_copy(bootargs, medium_enabled_boot_arg,
- value_buf, sizeof(value_buf));
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp) {
- magazine_medium_enabled = (value != 0);
- }
- }
-
- flag = malloc_common_value_for_key_copy(bootargs,
- medium_activation_threshold_boot_arg, value_buf, sizeof(value_buf));
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && value >= 0) {
- magazine_medium_active_threshold = (uint64_t)value;
- } else {
- malloc_report(ASL_LEVEL_ERR,
- "malloc_medium_activation_threshold must be positive - ignored.\n");
- }
- }
-
- flag = malloc_common_value_for_key_copy(bootargs,
- max_medium_magazines_boot_arg, value_buf, sizeof(value_buf));
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && value >= 0) {
- max_medium_magazines = (int)value;
- } else {
- malloc_report(ASL_LEVEL_ERR,
- "malloc_max_medium_magazines must be positive - ignored.\n");
- }
- }
-
- flag = malloc_common_value_for_key_copy(bootargs,
- medium_space_efficient_boot_arg, value_buf, sizeof(value_buf));
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp) {
- malloc_medium_space_efficient_enabled = (value != 0);
- }
- }
-
- flag = malloc_common_value_for_key_copy(bootargs, medium_madvise_dram_scale_divisor_boot_arg, value_buf, sizeof(value_buf));
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && value >= 0) {
- magazine_medium_madvise_dram_scale_divisor = (uint64_t)value;
- } else {
- malloc_report(ASL_LEVEL_ERR,
- "malloc_medium_madvise_dram_scale_divisor must be positive - ignored.\n");
- }
- }
-#endif // CONFIG_MEDIUM_ALLOCATOR
-}
-
-extern malloc_zone_t *force_asan_init_if_present(void)
- asm("_malloc_default_zone");
-
+/* TODO: Remove __malloc_entropy_setup, it was left to avoid rev-lock */
+void
+__malloc_entropy_setup(const char *apple[]) {
+ __malloc_init(apple);
+}
+
+/* TODO: Investigate adding _malloc_initialize() into this libSystem initializer */
void
__malloc_init(const char *apple[])
{
- // We could try to be clever and cater for arbitrary length bootarg
- // strings, but it's probably not worth it, especially as we would need
- // to temporarily allocate at least a page of memory to read the bootargs
- // into.
- char bootargs[1024] = { '\0' };
- bool allow_bootargs = true;
-#if CONFIG_FEATUREFLAGS_SIMPLE
- allow_bootargs &= os_feature_enabled_simple(libmalloc, EnableBootArgs, false);
+ const char **p;
+#if CONFIG_NANOZONE
+ _malloc_engaged_nano = 0;
+ for (p = apple; p && *p; p++) {
+ if (0 == strncmp(*p, "MallocNanoZone=1", strlen("MallocNanoZone=1"))) {
+ // _malloc_printf(ASL_LEVEL_INFO, "MallocNanoZone=1\n");
+ _malloc_engaged_nano = 1;
+ break;
+ }
+ }
#endif
-#if defined(_COMM_PAGE_DEV_FIRM)
- allow_bootargs &= !!*((uint32_t *)_COMM_PAGE_DEV_FIRM);
-#endif // _COMM_PAGE_DEV_FIRM
-
- size_t len = sizeof(bootargs) - 1;
- if (allow_bootargs &&
- !sysctlbyname("kern.bootargs", bootargs, &len, NULL, 0) &&
- len > 0) {
- bootargs[len + 1] = '\0';
- }
-
- const char **p;
- const char *malloc_experiments = NULL;
+
for (p = apple; p && *p; p++) {
if (strstr(*p, "malloc_entropy") == *p) {
int count = __entropy_from_kernel(*p);
- bzero((void *)*p, strlen(*p));
-
- if (sizeof(malloc_entropy) / sizeof(malloc_entropy[0]) == count) {
- _malloc_entropy_initialized = true;
+ bzero((void*)*p, strlen(*p));
+
+ if (sizeof(malloc_entropy)/sizeof(malloc_entropy[0]) == count) {
+ return;
}
- }
- if (strstr(*p, LIBMALLOC_EXPERIMENT_FACTORS_KEY) == *p) {
- malloc_experiments = *p;
- }
- }
- if (!_malloc_entropy_initialized) {
- getentropy((void*)malloc_entropy, sizeof(malloc_entropy));
- _malloc_entropy_initialized = true;
- }
-
- if (malloc_experiments) {
- __malloc_init_experiments(malloc_experiments);
- }
- __malloc_init_from_bootargs(bootargs);
- mvm_aslr_init();
-
- /*
- * This really is a renamed call to malloc_default_zone() which is
- * interposable and interposed by asan, so that we trigger the lazy
- * initialization of asan _BEFORE_ _malloc_initialize().
- *
- * If we do it after, then _malloc_initialize() then ASAN will replace
- * the system allocator too late and bad things happen.
- */
- force_asan_init_if_present();
-
- _malloc_initialize(apple, bootargs);
-}
-
-static void register_pgm_zone(bool internal_diagnostics);
-static void stack_logging_early_finished(const struct _malloc_late_init *funcs);
-
-// WARNING: The passed _malloc_late_init is a stack variable in
-// libSystem_initializer(). We must not hold on to it.
-//
-// WARNING 2: By the time this is called, malloc() is already used
-// a bunch of times (from libobjc, libxpc, ...).
-void
-__malloc_late_init(const struct _malloc_late_init *mli)
-{
- register_pgm_zone(mli->internal_diagnostics);
- stack_logging_early_finished(mli);
- initial_num_zones = malloc_num_zones;
-
-#if CONFIG_QUARANTINE
- if (malloc_quarantine_enabled) {
- quarantine_reset_environment();
- }
-#endif
-}
-
-MALLOC_NOEXPORT malloc_zone_t* lite_zone = NULL;
-
-MALLOC_ALWAYS_INLINE
+ break;
+ }
+ }
+
+ malloc_entropy[0] = ((uint64_t)arc4random()) << 32 | ((uint64_t)arc4random());
+ malloc_entropy[1] = ((uint64_t)arc4random()) << 32 | ((uint64_t)arc4random());
+ return;
+}
+
+static inline malloc_zone_t * find_registered_zone(const void *, size_t *) __attribute__((always_inline));
static inline malloc_zone_t *
-runtime_default_zone() {
- return (lite_zone) ? lite_zone : inline_malloc_default_zone();
-}
-
-static size_t
-default_zone_size(malloc_zone_t *zone, const void *ptr)
-{
- zone = runtime_default_zone();
-
- return zone->size(zone, ptr);
-}
-
-static void *
-default_zone_malloc(malloc_zone_t *zone, size_t size)
-{
- zone = runtime_default_zone();
-
- return zone->malloc(zone, size);
-}
-
-static void *
-default_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size)
-{
- zone = runtime_default_zone();
-
- return zone->calloc(zone, num_items, size);
-}
-
-static void *
-default_zone_valloc(malloc_zone_t *zone, size_t size)
-{
- zone = runtime_default_zone();
-
- return zone->valloc(zone, size);
-}
-
-static void
-default_zone_free(malloc_zone_t *zone, void *ptr)
-{
- zone = runtime_default_zone();
-
- return zone->free(zone, ptr);
-}
-
-static void *
-default_zone_realloc(malloc_zone_t *zone, void *ptr, size_t new_size)
-{
- zone = runtime_default_zone();
-
- return zone->realloc(zone, ptr, new_size);
-}
-
-static void
-default_zone_destroy(malloc_zone_t *zone)
-{
- zone = runtime_default_zone();
-
- return zone->destroy(zone);
-}
-
-static unsigned
-default_zone_batch_malloc(malloc_zone_t *zone, size_t size, void **results, unsigned count)
-{
- zone = runtime_default_zone();
-
- return zone->batch_malloc(zone, size, results, count);
-}
-
-static void
-default_zone_batch_free(malloc_zone_t *zone, void **to_be_freed, unsigned count)
-{
- zone = runtime_default_zone();
-
- return zone->batch_free(zone, to_be_freed, count);
-}
-
-static void *
-default_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
-{
- zone = runtime_default_zone();
-
- return zone->memalign(zone, alignment, size);
-}
-
-static void
-default_zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size)
-{
- zone = runtime_default_zone();
-
- return zone->free_definite_size(zone, ptr, size);
-}
-
-static size_t
-default_zone_pressure_relief(malloc_zone_t *zone, size_t goal)
-{
- zone = runtime_default_zone();
-
- return zone->pressure_relief(zone, goal);
-}
-
-static boolean_t
-default_zone_malloc_claimed_address(malloc_zone_t *zone, void *ptr)
-{
- zone = runtime_default_zone();
-
- return malloc_zone_claimed_address(zone, ptr);
-}
-
-static kern_return_t
-default_zone_ptr_in_use_enumerator(task_t task,
- void *context,
- unsigned type_mask,
- vm_address_t zone_address,
- memory_reader_t reader,
- vm_range_recorder_t recorder)
-{
- malloc_zone_t *zone = runtime_default_zone();
-
- return zone->introspect->enumerator(task, context, type_mask, (vm_address_t) zone, reader, recorder);
-}
-
-static size_t
-default_zone_good_size(malloc_zone_t *zone, size_t size)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->good_size(zone, size);
-}
-
-static boolean_t
-default_zone_check(malloc_zone_t *zone)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->check(zone);
-}
-
-static void
-default_zone_print(malloc_zone_t *zone, boolean_t verbose)
-{
- zone = runtime_default_zone();
-
- return (void)zone->introspect->print(zone, verbose);
-}
-
-static void
-default_zone_log(malloc_zone_t *zone, void *log_address)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->log(zone, log_address);
-}
-
-static void
-default_zone_force_lock(malloc_zone_t *zone)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->force_lock(zone);
-}
-
-static void
-default_zone_force_unlock(malloc_zone_t *zone)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->force_unlock(zone);
-}
-
-static void
-default_zone_statistics(malloc_zone_t *zone, malloc_statistics_t *stats)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->statistics(zone, stats);
-}
-
-static boolean_t
-default_zone_locked(malloc_zone_t *zone)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->zone_locked(zone);
-}
-
-static void
-default_zone_reinit_lock(malloc_zone_t *zone)
-{
- zone = runtime_default_zone();
-
- return zone->introspect->reinit_lock(zone);
-}
-
-static struct malloc_introspection_t default_zone_introspect = {
- default_zone_ptr_in_use_enumerator,
- default_zone_good_size,
- default_zone_check,
- default_zone_print,
- default_zone_log,
- default_zone_force_lock,
- default_zone_force_unlock,
- default_zone_statistics,
- default_zone_locked,
- NULL,
- NULL,
- NULL,
- NULL,
- default_zone_reinit_lock
-};
-
-typedef struct {
- malloc_zone_t malloc_zone;
- uint8_t pad[PAGE_MAX_SIZE - sizeof(malloc_zone_t)];
-} virtual_default_zone_t;
-
-static virtual_default_zone_t virtual_default_zone
-__attribute__((section("__DATA,__v_zone")))
-__attribute__((aligned(PAGE_MAX_SIZE))) = {
- NULL,
- NULL,
- default_zone_size,
- default_zone_malloc,
- default_zone_calloc,
- default_zone_valloc,
- default_zone_free,
- default_zone_realloc,
- default_zone_destroy,
- DEFAULT_MALLOC_ZONE_STRING,
- default_zone_batch_malloc,
- default_zone_batch_free,
- &default_zone_introspect,
- 10,
- default_zone_memalign,
- default_zone_free_definite_size,
- default_zone_pressure_relief,
- default_zone_malloc_claimed_address,
-};
-
-static malloc_zone_t *default_zone = &virtual_default_zone.malloc_zone;
-
-MALLOC_NOEXPORT
-/*static*/ boolean_t
-has_default_zone0(void)
-{
- return !has_injected_zone0;
-}
-
-static inline malloc_zone_t *find_registered_zone(const void *, size_t *) __attribute__((always_inline));
-static inline malloc_zone_t *
-find_registered_zone(const void *ptr, size_t *returned_size)
-{
+find_registered_zone(const void *ptr, size_t *returned_size) {
// Returns a zone which contains ptr, else NULL
if (0 == malloc_num_zones) {
- if (returned_size) {
- *returned_size = 0;
- }
+ if (returned_size) *returned_size = 0;
return NULL;
}
- // first look in the lite zone
- if (lite_zone) {
- malloc_zone_t *zone = lite_zone;
- size_t size = zone->size(zone, ptr);
- if (size) { // Claimed by this zone?
- if (returned_size) {
- *returned_size = size;
- }
- // Return the virtual default zone instead of the lite zone - see <rdar://problem/24994311>
- return default_zone;
- }
- }
-
- malloc_zone_t *zone;
- size_t size;
-
- // We assume that the initial zones will never be unregistered concurrently while this code is running so we can have
- // a fast path without synchronization. Callers who really do unregister these (to install their own default zone) need
- // to ensure they establish their zone setup during initialization and before entering a multi-threaded environment.
- for (uint32_t i = 0; i < initial_num_zones; i++) {
- zone = malloc_zones[i];
- size = zone->size(zone, ptr);
-
- if (size) { // Claimed by this zone?
- if (returned_size) {
- *returned_size = size;
- }
-
- // Asan and others replace the zone at position 0 with their own zone.
- // In that case just return that zone as they need this information.
- // Otherwise return the virtual default zone, not the actual zone in position 0.
- if (i == 0 && has_default_zone0()) {
- return default_zone;
- }
-
- return zone;
- }
- }
-
- int32_t volatile *pFRZCounter = pFRZCounterLive; // Capture pointer to the counter of the moment
- OSAtomicIncrement32Barrier(pFRZCounter); // Advance this counter -- our thread is in FRZ
-
- int32_t limit = *(int32_t volatile *)&malloc_num_zones;
+ // The default zone is registered in malloc_zones[0]. There's no danger that it will ever be unregistered.
+ // So don't advance the FRZ counter yet.
+ malloc_zone_t *zone = malloc_zones[0];
+ size_t size = zone->size(zone, ptr);
+ if (size) { // Claimed by this zone?
+ if (returned_size) *returned_size = size;
+ return zone;
+ }
+
+ int *pFRZCounter = pFRZCounterLive; // Capture pointer to the counter of the moment
+ __sync_fetch_and_add(pFRZCounter, 1); // Advance this counter -- our thread is in FRZ
+
+ unsigned index;
+ int32_t limit = *(volatile int32_t *)&malloc_num_zones;
+ malloc_zone_t **zones = &malloc_zones[1];
// From this point on, FRZ is accessing the malloc_zones[] array without locking
// in order to avoid contention on common operations (such as non-default-zone free()).
@@ -735,27 +257,23 @@
// are still valid). It also ensures that all the pointers in the zones array are
// valid until it returns, so that a stale value in limit is not dangerous.
- for (uint32_t i = initial_num_zones; i < limit; i++) {
- zone = malloc_zones[i];
+ for (index = 1; index < limit; ++index, ++zones) {
+ zone = *zones;
size = zone->size(zone, ptr);
if (size) { // Claimed by this zone?
- goto out;
+ if (returned_size) *returned_size = size;
+ __sync_fetch_and_sub(pFRZCounter, 1); // our thread is leaving FRZ
+ return zone;
}
}
// Unclaimed by any zone.
- zone = NULL;
- size = 0;
-out:
- if (returned_size) {
- *returned_size = size;
- }
- OSAtomicDecrement32Barrier(pFRZCounter); // our thread is leaving FRZ
- return zone;
-}
-
-void
-malloc_error_break(void)
-{
+ if (returned_size) *returned_size = 0;
+ __sync_fetch_and_sub(pFRZCounter, 1); // our thread is leaving FRZ
+ return NULL;
+}
+
+__attribute__((visibility("hidden"))) __attribute__((noinline)) void
+malloc_error_break(void) {
// Provides a non-inlined place for various malloc error procedures to call
// that will be called after an error message appears. It does not make
// sense for developers to call this function, so it is marked
@@ -763,9 +281,10 @@
MAGMALLOC_MALLOCERRORBREAK(); // DTrace USDT probe
}
-int
-malloc_gdb_po_unsafe(void)
-{
+extern boolean_t __stack_logging_locked();
+
+__attribute__((visibility("hidden"))) __attribute__((noinline)) __attribute__((used)) int
+malloc_gdb_po_unsafe(void) {
// In order to implement "po" other data formatters in gdb, the debugger
// calls functions that call malloc. The debugger will only run one thread
// of the program in this case, so if another thread is holding a zone lock,
@@ -775,9 +294,8 @@
// lock. If trylock succeeds, unlock it, otherwise return "locked". Returns
// 0 == safe, 1 == locked/unsafe.
- if (msl.stack_logging_locked && msl.stack_logging_locked()) {
+ if (__stack_logging_locked())
return 1;
- }
malloc_zone_t **zones = malloc_zones;
unsigned i, e = malloc_num_zones;
@@ -786,13 +304,11 @@
malloc_zone_t *zone = zones[i];
// Version must be >= 5 to look at the new introspection field.
- if (zone->version < 5) {
+ if (zone->version < 5)
continue;
- }
-
- if (zone->introspect->zone_locked && zone->introspect->zone_locked(zone)) {
+
+ if (zone->introspect->zone_locked && zone->introspect->zone_locked(zone))
return 1;
- }
}
return 0;
}
@@ -801,20 +317,18 @@
static void set_flags_from_environment(void);
-MALLOC_NOEXPORT void
-malloc_zone_register_while_locked(malloc_zone_t *zone, bool make_default)
-{
+static void
+malloc_zone_register_while_locked(malloc_zone_t *zone) {
size_t protect_size;
unsigned i;
/* scan the list of zones, to see if this zone is already registered. If
* so, print an error message and return. */
- for (i = 0; i != malloc_num_zones; ++i) {
+ for (i = 0; i != malloc_num_zones; ++i)
if (zone == malloc_zones[i]) {
- malloc_report(ASL_LEVEL_ERR, "Attempted to register zone more than once: %p\n", zone);
+ _malloc_printf(ASL_LEVEL_ERR, "Attempted to register zone more than once: %p\n", zone);
return;
}
- }
if (malloc_num_zones == malloc_num_zones_allocated) {
size_t malloc_zones_size = malloc_num_zones * sizeof(malloc_zone_t *);
@@ -825,25 +339,25 @@
vm_addr = vm_page_size;
kern_return_t kr = mach_vm_allocate(mach_task_self(), &vm_addr, alloc_size, alloc_flags);
if (kr) {
- malloc_report(ASL_LEVEL_ERR, "malloc_zone_register allocation failed: %d\n", kr);
+ _malloc_printf(ASL_LEVEL_ERR, "malloc_zone_register allocation failed: %d\n", kr);
return;
}
- malloc_zone_t **new_zones = (malloc_zone_t **)vm_addr;
+ malloc_zone_t **new_zones = (uintptr_t)vm_addr;
/* If there were previously allocated malloc zones, we need to copy them
* out of the previous array and into the new zones array */
if (malloc_zones) {
memcpy(new_zones, malloc_zones, malloc_zones_size);
- vm_addr = (mach_vm_address_t)malloc_zones;
+ vm_addr = malloc_zones;
mach_vm_size_t dealloc_size = round_page(malloc_zones_size);
mach_vm_deallocate(mach_task_self(), vm_addr, dealloc_size);
}
/* Update the malloc_zones pointer, which we leak if it was previously
* allocated, and the number of zones allocated */
- protect_size = (size_t)alloc_size;
+ protect_size = alloc_size;
malloc_zones = new_zones;
- malloc_num_zones_allocated = (int32_t)(alloc_size / sizeof(malloc_zone_t *));
+ malloc_num_zones_allocated = alloc_size / sizeof(malloc_zone_t *);
} else {
/* If we don't need to reallocate zones, we need to briefly change the
* page protection the malloc zones to allow writes */
@@ -851,223 +365,126 @@
mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
}
- if (make_default) {
- memmove(&malloc_zones[1], &malloc_zones[0], malloc_num_zones * sizeof(malloc_zone_t *));
- malloc_zones[0] = zone;
- } else {
- malloc_zones[malloc_num_zones] = zone;
- }
-
/* <rdar://problem/12871662> This store-increment needs to be visible in the correct
* order to any threads in find_registered_zone, such that if the incremented value
* in malloc_num_zones is visible then the pointer write before it must also be visible.
*
* While we could be slightly more efficent here with atomic ops the cleanest way to
- * ensure the proper store-release operation is performed is to use OSAtomic*Barrier
- * to update malloc_num_zones.
+ * ensure the proper store-release operation is performed is to use __sync... to update
+ * malloc_num_zones.
*/
- OSAtomicIncrement32Barrier(&malloc_num_zones);
+ malloc_zones[malloc_num_zones] = zone;
+ __sync_fetch_and_add(&malloc_num_zones, 1);
/* Finally, now that the zone is registered, disallow write access to the
* malloc_zones array */
mprotect(malloc_zones, protect_size, PROT_READ);
-
- // ASan and others interpose on mprotect() to ensure their zone is always at position 0.
- if (make_default && malloc_zones[0] != zone) {
- has_injected_zone0 = true;
- }
-
- //malloc_report(ASL_LEVEL_INFO, "Registered malloc_zone %p in malloc_zones %p [%u zones, %u bytes]\n", zone, malloc_zones,
- // malloc_num_zones, protect_size);
-}
-
-// This used to be called lazyily because it is using
-// dyld_process_is_restricted() before dyld_init() has run.
-//
-// However this function is safe to use, we keep this function separate
-// if we ever need to have a 2-stage init in the future.
+ //_malloc_printf(ASL_LEVEL_INFO, "Registered malloc_zone %p in malloc_zones %p [%u zones, %u bytes]\n", zone, malloc_zones, malloc_num_zones, protect_size);
+}
+
static void
-_malloc_initialize(const char *apple[], const char *bootargs)
-{
- phys_ncpus = *(uint8_t *)(uintptr_t)_COMM_PAGE_PHYSICAL_CPUS;
- logical_ncpus = *(uint8_t *)(uintptr_t)_COMM_PAGE_LOGICAL_CPUS;
-
- if (0 != (logical_ncpus % phys_ncpus)) {
- MALLOC_REPORT_FATAL_ERROR(logical_ncpus % phys_ncpus,
- "logical_ncpus %% phys_ncpus != 0\n");
- }
-
- switch (logical_ncpus / phys_ncpus) {
- case 1:
- hyper_shift = 0;
- break;
- case 2:
- hyper_shift = 1;
- break;
- case 4:
- hyper_shift = 2;
- break;
- default:
- MALLOC_REPORT_FATAL_ERROR(logical_ncpus / phys_ncpus, "logical_ncpus / phys_ncpus not 1, 2, or 4");
- }
-
- // max_magazines may already be set from a boot argument. Make sure that it
- // is bounded by the number of CPUs.
- if (max_magazines) {
- max_magazines = MIN(max_magazines, logical_ncpus);
- } else {
- max_magazines = logical_ncpus;
- }
-
- // similiarly, cap medium magazines at logical_ncpus but don't cap it by
- // the max magazines if it has been set explicitly
- if (max_medium_magazines) {
- max_medium_magazines = MIN(max_medium_magazines, logical_ncpus);
- } else {
- max_medium_magazines = max_magazines;
- }
-
- set_flags_from_environment(); // will only set flags up to two times
-
-#if CONFIG_QUARANTINE
- malloc_quarantine_enabled = quarantine_should_enable();
+_malloc_initialize(void) {
+ MALLOC_LOCK();
+ if (!_malloc_is_initialized) {
+ unsigned n;
+ malloc_zone_t *zone;
+
+ _malloc_is_initialized = TRUE;
+
+ set_flags_from_environment(); // will only set flags up to two times
+ n = malloc_num_zones;
+
+#if CONFIG_NANOZONE
+ malloc_zone_t *helper_zone = create_scalable_zone(0, malloc_debug_flags);
+ zone = create_nano_zone(0, helper_zone, malloc_debug_flags);
+
+ if (zone) {
+ malloc_zone_register_while_locked(zone);
+ malloc_zone_register_while_locked(helper_zone);
+
+ // Must call malloc_set_zone_name() *after* helper and nano are hooked together.
+ malloc_set_zone_name(zone, DEFAULT_MALLOC_ZONE_STRING);
+ malloc_set_zone_name(helper_zone, MALLOC_HELPER_ZONE_STRING);
+ } else {
+ zone = helper_zone;
+ malloc_zone_register_while_locked(zone);
+ malloc_set_zone_name(zone, DEFAULT_MALLOC_ZONE_STRING);
+ }
+#else
+ zone = create_scalable_zone(0, malloc_debug_flags);
+ malloc_zone_register_while_locked(zone);
+ malloc_set_zone_name(zone, DEFAULT_MALLOC_ZONE_STRING);
#endif
-
+
+ if (n != 0) { // make the default first, for efficiency
+ unsigned protect_size = malloc_num_zones_allocated * sizeof(malloc_zone_t *);
+ malloc_zone_t *hold = malloc_zones[0];
+
+ if(hold->zone_name && strcmp(hold->zone_name, DEFAULT_MALLOC_ZONE_STRING) == 0) {
+ malloc_set_zone_name(hold, NULL);
+ }
+
+ mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
+ malloc_zones[0] = malloc_zones[n];
+ malloc_zones[n] = hold;
+ mprotect(malloc_zones, protect_size, PROT_READ);
+ }
+ // _malloc_printf(ASL_LEVEL_INFO, "%d registered zones\n", malloc_num_zones);
+ // _malloc_printf(ASL_LEVEL_INFO, "malloc_zones is at %p; malloc_num_zones is at %p\n", (unsigned)&malloc_zones, (unsigned)&malloc_num_zones);
+ }
+ MALLOC_UNLOCK();
+}
+
+static inline malloc_zone_t *inline_malloc_default_zone(void) __attribute__((always_inline));
+static inline malloc_zone_t *
+inline_malloc_default_zone(void) {
+ if (!_malloc_is_initialized) _malloc_initialize();
+ // _malloc_printf(ASL_LEVEL_INFO, "In inline_malloc_default_zone with %d %d\n", malloc_num_zones, malloc_has_debug_zone);
+ return malloc_zones[0];
+}
+
+malloc_zone_t *
+malloc_default_zone(void) {
+ return inline_malloc_default_zone();
+}
+
+static inline malloc_zone_t *inline_malloc_default_scalable_zone(void) __attribute__((always_inline));
+static inline malloc_zone_t *
+inline_malloc_default_scalable_zone(void) {
+ unsigned index;
+
+ if (!_malloc_is_initialized) _malloc_initialize();
+ // _malloc_printf(ASL_LEVEL_INFO, "In inline_malloc_default_scalable_zone with %d %d\n", malloc_num_zones, malloc_has_debug_zone);
+
+ MALLOC_LOCK();
#if CONFIG_NANOZONE
- // TODO: envp should be passed down from Libsystem
- const char **envp = (const char **)*_NSGetEnviron();
-
- // Force magazine_malloc then quarantine is enabled, to avoid speculative
- // out-of-bounds use-after-free reads that nano/nanov2 performs.
- if (!malloc_quarantine_enabled) {
- nano_common_init(envp, apple, bootargs);
- }
-#endif // CONFIG_NANOZONE
-
- initial_scalable_zone = create_scalable_zone(0, malloc_debug_flags);
- malloc_set_zone_name(initial_scalable_zone, DEFAULT_MALLOC_ZONE_STRING);
- malloc_zone_register_while_locked(initial_scalable_zone, /*make_default=*/true);
-
-#if CONFIG_NANOZONE
- nano_common_configure();
-
- malloc_zone_t *helper_zone = initial_scalable_zone;
-
- if (_malloc_engaged_nano == NANO_V2) {
- initial_nano_zone = nanov2_create_zone(helper_zone, malloc_debug_flags);
- }
-
- if (initial_nano_zone) {
- malloc_set_zone_name(initial_nano_zone, DEFAULT_MALLOC_ZONE_STRING);
- malloc_set_zone_name(helper_zone, MALLOC_HELPER_ZONE_STRING);
- malloc_zone_register_while_locked(initial_nano_zone, /*make_default=*/true);
+ for (index = 0; index < malloc_num_zones; ++index) {
+ malloc_zone_t *z = malloc_zones[index];
+
+ if(z->zone_name && strcmp(z->zone_name, MALLOC_HELPER_ZONE_STRING) == 0) {
+ MALLOC_UNLOCK();
+ return z;
+ }
}
#endif
-
-#if CONFIG_QUARANTINE
- if (malloc_quarantine_enabled) {
- malloc_zone_t *wrapped_zone = malloc_zones[0];
- malloc_zone_t *quarantine_zone = quarantine_create_zone(wrapped_zone);
- malloc_zone_register_while_locked(quarantine_zone, /*make_default=*/true);
- }
-#endif
-
- initial_num_zones = malloc_num_zones;
-
-#if CONFIG_MEDIUM_ALLOCATOR
- uint64_t memsize = platform_hw_memsize();
- if (memsize >= 8 * magazine_medium_madvise_dram_scale_divisor) {
- magazine_medium_madvise_window_scale_factor = 8;
- } else if (memsize >= 4 * magazine_medium_madvise_dram_scale_divisor) {
- magazine_medium_madvise_window_scale_factor = 4;
- } else if (memsize >= 2 * magazine_medium_madvise_dram_scale_divisor) {
- magazine_medium_madvise_window_scale_factor = 2;
- } else {
- magazine_medium_madvise_window_scale_factor = 1;
- }
-#endif /* CONFIG_MEDIUM_ALLOCATOR */
-
- // malloc_report(ASL_LEVEL_INFO, "%d registered zones\n", malloc_num_zones);
- // malloc_report(ASL_LEVEL_INFO, "malloc_zones is at %p; malloc_num_zones is at %p\n", (unsigned)&malloc_zones,
- // (unsigned)&malloc_num_zones);
-}
-
-static bool internal_build;
-static bool
-enable_pgm(void)
-{
- bool other_debug_tool = has_injected_zone0 || malloc_quarantine_enabled;
- return !other_debug_tool && pgm_should_enable(internal_build);
-}
-
-static void
-register_pgm_zone(bool internal_diagnostics)
-{
- if (internal_diagnostics) {
- internal_build = true;
- }
- if (enable_pgm()) {
- malloc_zone_t *wrapped_zone = malloc_zones[0];
- malloc_zone_t *pgm_zone = pgm_create_zone(wrapped_zone);
- malloc_zone_register_while_locked(pgm_zone, /*make_default=*/true);
- }
-}
-
-static inline malloc_zone_t *
-inline_malloc_default_zone(void)
-{
- // malloc_report(ASL_LEVEL_INFO, "In inline_malloc_default_zone with %d %d\n", malloc_num_zones, malloc_has_debug_zone);
- return malloc_zones[0];
-}
-
-malloc_zone_t *
-malloc_default_zone(void)
-{
- return default_zone;
-}
-
-static void *
-legacy_zeroing_large_malloc(malloc_zone_t *zone, size_t size)
-{
- if (size > LEGACY_ZEROING_THRESHOLD) {
- // Leopard and earlier returned a ZFOD range, so clear to zero always,
- // ham-handedly touching in each page
- return default_zone_calloc(zone, 1, size);
- } else {
- return default_zone_malloc(zone, size);
- }
-}
-
-static void *
-legacy_zeroing_large_valloc(malloc_zone_t *zone, size_t size)
-{
- void *p = default_zone_valloc(zone, size);
-
- // Leopard and earlier returned a ZFOD range, so ...
- memset(p, 0, size); // Clear to zero always, ham-handedly touching in each page
- return p;
-}
-
-void
-zeroify_scalable_zone(malloc_zone_t *zone)
-{
- // <rdar://problem/27190324> this checkfix should replace the default zone's
- // allocation routines with the zeroing versions. Instead of getting in hot
- // water with the wrong zone, ensure that we're mutating the zone we expect.
- //
- // Additionally, the default_zone is no longer PROT_READ, so the two mprotect
- // calls that were here are no longer needed.
- if (zone == default_zone) {
- zone->malloc = (void *)legacy_zeroing_large_malloc;
- zone->valloc = (void *)legacy_zeroing_large_valloc;
- }
+ for (index = 0; index < malloc_num_zones; ++index) {
+ malloc_zone_t *z = malloc_zones[index];
+
+ if(z->zone_name && strcmp(z->zone_name, DEFAULT_MALLOC_ZONE_STRING) == 0) {
+ MALLOC_UNLOCK();
+ return z;
+ }
+ }
+ MALLOC_UNLOCK();
+
+ malloc_printf("*** malloc_default_scalable_zone() failed to find 'DefaultMallocZone'\n");
+ return NULL; // FIXME: abort() instead?
}
/*
- * Returns the version of the Nano allocator that's in use, or 0 if not.
+ * malloc_engaged_nano() is for the benefit of libdispatch, which calls here just once.
*/
-int
-malloc_engaged_nano(void)
+boolean_t malloc_engaged_nano(void)
{
#if CONFIG_NANOZONE
return _malloc_engaged_nano;
@@ -1077,8 +494,7 @@
}
malloc_zone_t *
-malloc_default_purgeable_zone(void)
-{
+malloc_default_purgeable_zone(void) {
static malloc_zone_t *dpz;
if (!dpz) {
@@ -1086,35 +502,43 @@
// PR_7288598: Must pass a *scalable* zone (szone) as the helper for create_purgeable_zone().
// Take care that the zone so obtained is not subject to interposing.
//
- malloc_zone_t *tmp = create_purgeable_zone(0, initial_scalable_zone, malloc_debug_flags);
+ malloc_zone_t *tmp = create_purgeable_zone(0, inline_malloc_default_scalable_zone(), malloc_debug_flags);
malloc_zone_register(tmp);
malloc_set_zone_name(tmp, DEFAULT_PUREGEABLE_ZONE_STRING);
- if (!OSAtomicCompareAndSwapPtrBarrier(NULL, tmp, (void**)&dpz)) {
+ if (!__sync_bool_compare_and_swap(&dpz, NULL, tmp))
malloc_destroy_zone(tmp);
- }
}
return dpz;
}
static void
-set_flags_from_environment(void)
-{
- const char *flag;
- const char **env = (const char **)*_NSGetEnviron();
- const char **p;
- const char *c;
-
+set_flags_from_environment(void) {
+ const char *flag;
+ int fd;
+ char **env = * _NSGetEnviron();
+ char **p;
+ char *c;
+
+ if (malloc_debug_file != STDERR_FILENO) {
+ close(malloc_debug_file);
+ malloc_debug_file = STDERR_FILENO;
+ }
#if __LP64__
- malloc_debug_flags = MALLOC_ABORT_ON_CORRUPTION; // Set always on 64-bit processes
+ malloc_debug_flags = SCALABLE_MALLOC_ABORT_ON_CORRUPTION; // Set always on 64-bit processes
#else
- int libSystemVersion = NSVersionOfLinkTimeLibrary("System");
- if ((-1 != libSystemVersion) && ((libSystemVersion >> 16) < 126) /* Lion or greater */) {
+ int libSystemVersion = NSVersionOfLinkTimeLibrary("System");
+ if ((-1 != libSystemVersion) && ((libSystemVersion >> 16) < 126) /* Lion or greater */)
malloc_debug_flags = 0;
- } else {
- malloc_debug_flags = MALLOC_ABORT_ON_CORRUPTION;
- }
+ else
+ malloc_debug_flags = SCALABLE_MALLOC_ABORT_ON_CORRUPTION;
#endif
-
+ stack_logging_enable_logging = 0;
+ stack_logging_dontcompact = 0;
+ malloc_logger = NULL;
+ malloc_check_start = 0;
+ malloc_check_each = 1000;
+ malloc_check_abort = 0;
+ malloc_check_sleep = 100;
/*
* Given that all environment variables start with "Malloc" we optimize by scanning quickly
* first the environment, therefore avoiding repeated calls to getenv().
@@ -1122,330 +546,160 @@
* our behaviour.
*/
for (p = env; (c = *p) != NULL; ++p) {
-#if RDAR_48993662
- if (!strncmp(c, "Malloc", 6) || !strncmp(c, "_Malloc", 6)) {
-#else // RDAR_48993662
if (!strncmp(c, "Malloc", 6)) {
-#endif // RDAR_48993662
- if (issetugid()) {
+ if (issetugid())
return;
+ break;
+ }
+ }
+ if (c == NULL)
+ return;
+ flag = getenv("MallocLogFile");
+ if (flag) {
+ fd = open(flag, O_WRONLY|O_APPEND|O_CREAT, 0644);
+ if (fd >= 0) {
+ malloc_debug_file = fd;
+ fcntl(fd, F_SETFD, 0); // clear close-on-exec flag XXX why?
+ } else {
+ malloc_printf("Could not open %s, using stderr\n", flag);
+ }
+ }
+ if (getenv("MallocGuardEdges")) {
+ malloc_debug_flags |= SCALABLE_MALLOC_ADD_GUARD_PAGES;
+ _malloc_printf(ASL_LEVEL_INFO, "protecting edges\n");
+ if (getenv("MallocDoNotProtectPrelude")) {
+ malloc_debug_flags |= SCALABLE_MALLOC_DONT_PROTECT_PRELUDE;
+ _malloc_printf(ASL_LEVEL_INFO, "... but not protecting prelude guard page\n");
+ }
+ if (getenv("MallocDoNotProtectPostlude")) {
+ malloc_debug_flags |= SCALABLE_MALLOC_DONT_PROTECT_POSTLUDE;
+ _malloc_printf(ASL_LEVEL_INFO, "... but not protecting postlude guard page\n");
+ }
+ }
+ flag = getenv("MallocStackLogging");
+ if (!flag) {
+ flag = getenv("MallocStackLoggingNoCompact");
+ stack_logging_dontcompact = 1;
+ }
+ if (flag) {
+ // Set up stack logging as early as possible to catch all ensuing VM allocations,
+ // including those from _malloc_printf and malloc zone setup. Make sure to set
+ // __syscall_logger after this, because prepare_to_log_stacks() itself makes VM
+ // allocations that we aren't prepared to log yet.
+ __prepare_to_log_stacks();
+ if (strcmp(flag,"malloc") == 0) {
+ malloc_logger = __disk_stack_logging_log_stack;
+ _malloc_printf(ASL_LEVEL_INFO, "recording malloc (but not VM allocation) stacks to disk using standard recorder\n");
+ } else if (strcmp(flag,"vm") == 0) {
+ __syscall_logger = __disk_stack_logging_log_stack;
+ _malloc_printf(ASL_LEVEL_INFO, "recording VM allocation (but not malloc) stacks to disk using standard recorder\n");
+ } else {
+ malloc_logger = __disk_stack_logging_log_stack;
+ __syscall_logger = __disk_stack_logging_log_stack;
+ _malloc_printf(ASL_LEVEL_INFO, "recording malloc and VM allocation stacks to disk using standard recorder\n");
+ }
+ stack_logging_enable_logging = 1;
+ if (stack_logging_dontcompact) {
+ if (malloc_logger == __disk_stack_logging_log_stack) {
+ _malloc_printf(ASL_LEVEL_INFO, "stack logging compaction turned off; size of log files on disk can increase rapidly\n");
+ } else {
+ _malloc_printf(ASL_LEVEL_INFO, "stack logging compaction turned off; VM can increase rapidly\n");
}
- break;
- }
- }
-
- /*
- * Deny certain flags for entitled processes rdar://problem/13521742
- * MallocLogFile & MallocCorruptionAbort
- * as these provide the ability to turn *off* aborting in error cases.
- */
- bool restricted = dyld_process_is_restricted();
- malloc_print_configure(restricted);
-
- if (c == NULL) {
- return;
- }
-
- flag = getenv("MallocGuardEdges");
- if (flag) {
- if (!strcmp(flag, "all")) {
- // "MallocGuardEdges=all" adds guard page(s) for every region.
- // Do not do this on 32-bit platforms because there is insufficient
- // address space. These pages are always protected.
-#if MALLOC_TARGET_64BIT
- malloc_debug_flags |= MALLOC_GUARD_ALL | MALLOC_ADD_GUARD_PAGE_FLAGS;
- malloc_debug_flags &= ~(MALLOC_DONT_PROTECT_PRELUDE|MALLOC_DONT_PROTECT_POSTLUDE);
- malloc_report(ASL_LEVEL_INFO, "adding guard pages to all regions\n");
-#endif // MALLOC_TARGET_64BIT
- } else {
- malloc_debug_flags |= MALLOC_ADD_GUARD_PAGE_FLAGS;
- malloc_debug_flags &= ~MALLOC_GUARD_ALL;
- malloc_report(ASL_LEVEL_INFO, "adding guard pages for large allocator blocks\n");
- if (getenv("MallocDoNotProtectPrelude")) {
- malloc_debug_flags |= MALLOC_DONT_PROTECT_PRELUDE;
- malloc_report(ASL_LEVEL_INFO, "... but not protecting prelude guard page\n");
- }
- if (getenv("MallocDoNotProtectPostlude")) {
- malloc_debug_flags |= MALLOC_DONT_PROTECT_POSTLUDE;
- malloc_report(ASL_LEVEL_INFO, "... but not protecting postlude guard page\n");
- }
- }
- }
-
+ }
+ }
if (getenv("MallocScribble")) {
- malloc_debug_flags |= MALLOC_DO_SCRIBBLE;
- malloc_report(ASL_LEVEL_INFO, "enabling scribbling to detect mods to free blocks\n");
+ malloc_debug_flags |= SCALABLE_MALLOC_DO_SCRIBBLE;
+ _malloc_printf(ASL_LEVEL_INFO, "enabling scribbling to detect mods to free blocks\n");
}
if (getenv("MallocErrorAbort")) {
- malloc_debug_flags |= MALLOC_ABORT_ON_ERROR;
- malloc_report(ASL_LEVEL_INFO, "enabling abort() on bad malloc or free\n");
- }
- if (getenv("MallocTracing")) {
- malloc_tracing_enabled = true;
- }
+ malloc_debug_flags |= SCALABLE_MALLOC_ABORT_ON_ERROR;
+ _malloc_printf(ASL_LEVEL_INFO, "enabling abort() on bad malloc or free\n");
+ }
+#if CONFIG_NANOZONE
+ /* Explicit overrides from the environment */
+ if ((flag = getenv("MallocNanoZone"))) {
+ if (flag[0] == '1') {
+ _malloc_engaged_nano = 1;
+ } else if (flag[0] == '0') {
+ _malloc_engaged_nano = 0;
+ }
+ }
+#endif /* CONFIG_NANOZONE */
#if __LP64__
-/* initialization above forces MALLOC_ABORT_ON_CORRUPTION of 64-bit processes */
+ /* initialization above forces SCALABLE_MALLOC_ABORT_ON_CORRUPTION of 64-bit processes */
#else
flag = getenv("MallocCorruptionAbort");
- if (!restricted && flag && (flag[0] == '0')) { // Set from an environment variable in 32-bit processes
- malloc_debug_flags &= ~MALLOC_ABORT_ON_CORRUPTION;
+ if (flag && (flag[0] == '0')) { // Set from an environment variable in 32-bit processes
+ malloc_debug_flags &= ~SCALABLE_MALLOC_ABORT_ON_CORRUPTION;
} else if (flag) {
- malloc_debug_flags |= MALLOC_ABORT_ON_CORRUPTION;
+ malloc_debug_flags |= SCALABLE_MALLOC_ABORT_ON_CORRUPTION;
}
#endif
flag = getenv("MallocCheckHeapStart");
if (flag) {
- malloc_check_start = (unsigned)strtoul(flag, NULL, 0);
- if (malloc_check_start == 0) {
- malloc_check_start = 1;
- }
- if (malloc_check_start == -1) {
- malloc_check_start = 1;
- }
+ malloc_check_start = strtoul(flag, NULL, 0);
+ if (malloc_check_start == 0) malloc_check_start = 1;
+ if (malloc_check_start == -1) malloc_check_start = 1;
flag = getenv("MallocCheckHeapEach");
if (flag) {
- malloc_check_each = (unsigned)strtoul(flag, NULL, 0);
- if (malloc_check_each == 0) {
- malloc_check_each = 1;
- }
- if (malloc_check_each == -1) {
- malloc_check_each = 1;
- }
- }
- malloc_report(ASL_LEVEL_INFO, "checks heap after operation #%d and each %d operations\n", malloc_check_start, malloc_check_each);
+ malloc_check_each = strtoul(flag, NULL, 0);
+ if (malloc_check_each == 0) malloc_check_each = 1;
+ if (malloc_check_each == -1) malloc_check_each = 1;
+ }
+ _malloc_printf(ASL_LEVEL_INFO, "checks heap after %dth operation and each %d operations\n", malloc_check_start, malloc_check_each);
flag = getenv("MallocCheckHeapAbort");
- if (flag) {
- malloc_check_abort = (unsigned)strtol(flag, NULL, 0);
- }
- if (malloc_check_abort) {
- malloc_report(ASL_LEVEL_INFO, "will abort on heap corruption\n");
- } else {
+ if (flag)
+ malloc_check_abort = strtol(flag, NULL, 0);
+ if (malloc_check_abort)
+ _malloc_printf(ASL_LEVEL_INFO, "will abort on heap corruption\n");
+ else {
flag = getenv("MallocCheckHeapSleep");
- if (flag) {
- malloc_check_sleep = (unsigned)strtol(flag, NULL, 0);
- }
- if (malloc_check_sleep > 0) {
- malloc_report(ASL_LEVEL_INFO, "will sleep for %d seconds on heap corruption\n", malloc_check_sleep);
- } else if (malloc_check_sleep < 0) {
- malloc_report(ASL_LEVEL_INFO, "will sleep once for %d seconds on heap corruption\n", -malloc_check_sleep);
- } else {
- malloc_report(ASL_LEVEL_INFO, "no sleep on heap corruption\n");
- }
- }
- }
-
- flag = getenv("MallocMaxMagazines");
-#if RDAR_48993662
- if (!flag) {
- flag = getenv("_MallocMaxMagazines");
- }
-#endif // RDAR_48993662
- if (flag) {
- int value = (unsigned)strtol(flag, NULL, 0);
- if (value == 0) {
- malloc_report(ASL_LEVEL_INFO, "Maximum magazines defaulted to %d\n", max_magazines);
- } else if (value < 0) {
- malloc_report(ASL_LEVEL_ERR, "Maximum magazines must be positive - ignored.\n");
- } else if (value > logical_ncpus) {
- max_magazines = logical_ncpus;
- malloc_report(ASL_LEVEL_INFO, "Maximum magazines limited to number of logical CPUs (%d)\n", max_magazines);
- } else {
- max_magazines = value;
- malloc_report(ASL_LEVEL_INFO, "Maximum magazines set to %d\n", max_magazines);
- }
- }
-
- flag = getenv("MallocLargeExpandedCacheThreshold");
- if (flag) {
- uint64_t value = (uint64_t)strtoull(flag, NULL, 0);
- if (value == 0) {
- malloc_report(ASL_LEVEL_INFO, "Large expanded cache threshold defaulted to %lly\n", magazine_large_expanded_cache_threshold);
- } else if (value < 0) {
- malloc_report(ASL_LEVEL_ERR, "MallocLargeExpandedCacheThreshold must be positive - ignored.\n");
- } else {
- magazine_large_expanded_cache_threshold = value;
- malloc_report(ASL_LEVEL_INFO, "Large expanded cache threshold set to %lly\n", magazine_large_expanded_cache_threshold);
- }
- }
-
- flag = getenv("MallocLargeDisableASLR");
- if (flag) {
- uint64_t value = (uint64_t)strtoull(flag, NULL, 0);
- if (value == 0) {
- malloc_report(ASL_LEVEL_INFO, "Enabling ASLR slide on large allocations\n");
- malloc_debug_flags &= ~DISABLE_LARGE_ASLR;
- } else if (value != 0) {
- malloc_report(ASL_LEVEL_INFO, "Disabling ASLR slide on large allocations\n");
- malloc_debug_flags |= DISABLE_LARGE_ASLR;
- }
- }
-
-#if CONFIG_AGGRESSIVE_MADVISE || CONFIG_LARGE_CACHE
- // convenience flag to configure policies usually associated with memory-constrained platforms (iOS)
- // that trade some amount of time efficiency for space efficiency
- flag = getenv("MallocSpaceEfficient");
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && endp != flag && (value == 0 || value == 1)) {
-#if CONFIG_AGGRESSIVE_MADVISE
- aggressive_madvise_enabled = (value == 1);
-#endif // CONFIG_AGGRESSIVE_MADVISE
-#if CONFIG_LARGE_CACHE
- large_cache_enabled = (value == 0);
-#endif // CONFIG_LARGE_CACHE
- malloc_space_efficient_enabled = (value == 1);
- // consider disabling medium magazine if aggressive madvise is not sufficient
- } else {
- malloc_report(ASL_LEVEL_ERR, "MallocSpaceEfficient must be 0 or 1.\n");
- }
- }
-#endif // CONFIG_AGGRESSIVE_MADVISE || CONFIG_LARGE_CACHE
-
-#if CONFIG_MEDIUM_ALLOCATOR
- flag = getenv("MallocMediumZone");
- if (flag) {
- int value = (unsigned)strtol(flag, NULL, 0);
- if (value == 0) {
- magazine_medium_enabled = false;
- } else if (value == 1) {
- magazine_medium_enabled = true;
- }
- }
-
- flag = getenv("MallocMediumActivationThreshold");
- if (flag) {
- uint64_t value = (uint64_t)strtoull(flag, NULL, 0);
- if (value == 0) {
- malloc_report(ASL_LEVEL_INFO, "Medium activation threshold defaulted to %lly\n", magazine_medium_active_threshold);
- } else if (value < 0) {
- malloc_report(ASL_LEVEL_ERR, "MallocMediumActivationThreshold must be positive - ignored.\n");
- } else {
- magazine_medium_active_threshold = value;
- malloc_report(ASL_LEVEL_INFO, "Medium activation threshold set to %lly\n", magazine_medium_active_threshold);
- }
- }
-
- flag = getenv("MallocMediumSpaceEfficient");
- if (flag) {
- uint64_t value = (uint64_t)strtoull(flag, NULL, 0);
- if (value == 0) {
- malloc_medium_space_efficient_enabled = false;
- } else if (value == 1) {
- malloc_medium_space_efficient_enabled = true;
- }
- }
-
- if (malloc_medium_space_efficient_enabled && malloc_space_efficient_enabled) {
- // Bring down MallocMaxMediumMagazines to only a single magazine in
- // space-efficent processes but do this before the envvar so that it
- // can still be overridden at the command line.
- max_medium_magazines = 1;
- }
-
- flag = getenv("MallocMaxMediumMagazines");
-#if RDAR_48993662
- if (!flag) {
- flag = getenv("_MallocMaxMediumMagazines");
- }
-#endif // RDAR_48993662
- if (flag) {
- int value = (unsigned)strtol(flag, NULL, 0);
- if (value == 0) {
- malloc_report(ASL_LEVEL_INFO, "Maximum medium magazines defaulted to %d\n", max_magazines);
- } else if (value < 0) {
- malloc_report(ASL_LEVEL_ERR, "Maximum medium magazines must be positive - ignored.\n");
- } else if (value > logical_ncpus) {
- max_medium_magazines = logical_ncpus;
- malloc_report(ASL_LEVEL_INFO, "Maximum medium magazines limited to number of logical CPUs (%d)\n", max_medium_magazines);
- } else {
- max_medium_magazines = value;
- malloc_report(ASL_LEVEL_INFO, "Maximum medium magazines set to %d\n", max_medium_magazines);
- }
- }
-#endif // CONFIG_MEDIUM_ALLOCATOR
-
-#if CONFIG_AGGRESSIVE_MADVISE
- flag = getenv("MallocAggressiveMadvise");
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && endp != flag && (value == 0 || value == 1)) {
- aggressive_madvise_enabled = (value == 1);
- } else {
- malloc_report(ASL_LEVEL_ERR, "MallocAggressiveMadvise must be 0 or 1.\n");
- }
- }
-#endif // CONFIG_AGGRESSIVE_MADVISE
-
-#if CONFIG_LARGE_CACHE
- flag = getenv("MallocLargeCache");
- if (flag) {
- const char *endp;
- long value = malloc_common_convert_to_long(flag, &endp);
- if (!*endp && endp != flag && (value == 0 || value == 1)) {
- large_cache_enabled = (value == 1);
- } else {
- malloc_report(ASL_LEVEL_ERR, "MallocLargeCache must be 0 or 1.\n");
- }
- }
-#endif // CONFIG_LARGE_CACHE
-
-#if CONFIG_RECIRC_DEPOT
- flag = getenv("MallocRecircRetainedRegions");
- if (flag) {
- int value = (int)strtol(flag, NULL, 0);
- if (value > 0) {
- recirc_retained_regions = value;
- } else {
- malloc_report(ASL_LEVEL_ERR, "MallocRecircRetainedRegions must be positive - ignored.\n");
- }
- }
-#endif // CONFIG_RECIRC_DEPOT
+ if (flag)
+ malloc_check_sleep = strtol(flag, NULL, 0);
+ if (malloc_check_sleep > 0)
+ _malloc_printf(ASL_LEVEL_INFO, "will sleep for %d seconds on heap corruption\n", malloc_check_sleep);
+ else if (malloc_check_sleep < 0)
+ _malloc_printf(ASL_LEVEL_INFO, "will sleep once for %d seconds on heap corruption\n", -malloc_check_sleep);
+ else
+ _malloc_printf(ASL_LEVEL_INFO, "no sleep on heap corruption\n");
+ }
+ }
if (getenv("MallocHelp")) {
- malloc_report(ASL_LEVEL_INFO,
- "environment variables that can be set for debug:\n"
- "- MallocLogFile <f> to create/append messages to file <f> instead of stderr\n"
- "- MallocGuardEdges to add 2 guard pages for each large block\n"
- "- MallocDoNotProtectPrelude to disable protection (when previous flag set)\n"
- "- MallocDoNotProtectPostlude to disable protection (when previous flag set)\n"
- "- MallocStackLogging to record all stacks. Tools like leaks can then be applied\n"
- "- MallocStackLoggingNoCompact to record all stacks. Needed for malloc_history\n"
- "- MallocStackLoggingDirectory to set location of stack logs, which can grow large; default is /tmp\n"
- "- MallocScribble to detect writing on free blocks and missing initializers:\n"
- " 0x55 is written upon free and 0xaa is written on allocation\n"
- "- MallocCheckHeapStart <n> to start checking the heap after <n> operations\n"
- "- MallocCheckHeapEach <s> to repeat the checking of the heap after <s> operations\n"
- "- MallocCheckHeapSleep <t> to sleep <t> seconds on heap corruption\n"
- "- MallocCheckHeapAbort <b> to abort on heap corruption if <b> is non-zero\n"
- "- MallocCorruptionAbort to abort on malloc errors, but not on out of memory for 32-bit processes\n"
- " MallocCorruptionAbort is always set on 64-bit processes\n"
- "- MallocErrorAbort to abort on any malloc error, including out of memory\n"\
- "- MallocTracing to emit kdebug trace points on malloc entry points\n"\
- "- MallocHelp - this help!\n");
+ _malloc_printf(ASL_LEVEL_INFO,
+ "environment variables that can be set for debug:\n"
+ "- MallocLogFile <f> to create/append messages to file <f> instead of stderr\n"
+ "- MallocGuardEdges to add 2 guard pages for each large block\n"
+ "- MallocDoNotProtectPrelude to disable protection (when previous flag set)\n"
+ "- MallocDoNotProtectPostlude to disable protection (when previous flag set)\n"
+ "- MallocStackLogging to record all stacks. Tools like leaks can then be applied\n"
+ "- MallocStackLoggingNoCompact to record all stacks. Needed for malloc_history\n"
+ "- MallocStackLoggingDirectory to set location of stack logs, which can grow large; default is /tmp\n"
+ "- MallocScribble to detect writing on free blocks and missing initializers:\n"
+ " 0x55 is written upon free and 0xaa is written on allocation\n"
+ "- MallocCheckHeapStart <n> to start checking the heap after <n> operations\n"
+ "- MallocCheckHeapEach <s> to repeat the checking of the heap after <s> operations\n"
+ "- MallocCheckHeapSleep <t> to sleep <t> seconds on heap corruption\n"
+ "- MallocCheckHeapAbort <b> to abort on heap corruption if <b> is non-zero\n"
+ "- MallocCorruptionAbort to abort on malloc errors, but not on out of memory for 32-bit processes\n"
+ " MallocCorruptionAbort is always set on 64-bit processes\n"
+ "- MallocErrorAbort to abort on any malloc error, including out of memory\n"
+ "- MallocHelp - this help!\n");
}
}
malloc_zone_t *
malloc_create_zone(vm_size_t start_size, unsigned flags)
{
- malloc_zone_t *zone;
+ malloc_zone_t *zone;
/* start_size doesn't actually appear to be used, but we test anyway. */
if (start_size > MALLOC_ABSOLUTE_MAX_SIZE) {
return NULL;
}
-
+ if (!_malloc_is_initialized) _malloc_initialize();
zone = create_scalable_zone(start_size, flags | malloc_debug_flags);
malloc_zone_register(zone);
-
-#if CONFIG_PGM_WRAP_CUSTOM_ZONES
- if (enable_pgm()) {
- zone = pgm_create_zone(zone);
- malloc_zone_register(zone);
- }
-#endif
return zone;
}
@@ -1456,403 +710,234 @@
void
malloc_create_legacy_default_zone(void)
{
- malloc_zone_t *zone;
-
+ malloc_zone_t *zone;
+ int i;
+
+ if (!_malloc_is_initialized) _malloc_initialize();
zone = create_legacy_scalable_zone(0, malloc_debug_flags);
MALLOC_LOCK();
+ malloc_zone_register_while_locked(zone);
//
// Establish the legacy scalable zone just created as the default zone.
//
malloc_zone_t *hold = malloc_zones[0];
- if (hold->zone_name && strcmp(hold->zone_name, DEFAULT_MALLOC_ZONE_STRING) == 0) {
+ if(hold->zone_name && strcmp(hold->zone_name, DEFAULT_MALLOC_ZONE_STRING) == 0) {
malloc_set_zone_name(hold, NULL);
}
malloc_set_zone_name(zone, DEFAULT_MALLOC_ZONE_STRING);
- malloc_zone_register_while_locked(zone, /*make_default=*/true);
+ unsigned protect_size = malloc_num_zones_allocated * sizeof(malloc_zone_t *);
+ mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
+
+ // assert(zone == malloc_zones[malloc_num_zones - 1];
+ for (i = malloc_num_zones - 1; i > 0; --i) {
+ malloc_zones[i] = malloc_zones[i - 1];
+ }
+ malloc_zones[0] = zone;
+
+ mprotect(malloc_zones, protect_size, PROT_READ);
MALLOC_UNLOCK();
}
void
-malloc_destroy_zone(malloc_zone_t *zone)
-{
+malloc_destroy_zone(malloc_zone_t *zone) {
malloc_set_zone_name(zone, NULL); // Deallocate zone name wherever it may reside PR_7701095
malloc_zone_unregister(zone);
zone->destroy(zone);
}
-static vm_address_t *frames = NULL;
-static unsigned num_frames;
-
-MALLOC_NOINLINE
-void
-malloc_zone_check_fail(const char *msg, const char *fmt, ...)
-{
- _SIMPLE_STRING b = _simple_salloc();
- if (b) {
- _simple_sprintf(b, "*** MallocCheckHeap: FAILED check at operation #%d\n", malloc_check_counter - 1);
+/********* Block creation and manipulation ************/
+
+static void
+internal_check(void) {
+ static vm_address_t *frames = NULL;
+ static unsigned num_frames;
+ if (malloc_zone_check(NULL)) {
+ if (!frames) vm_allocate(mach_task_self(), (void *)&frames, vm_page_size, 1);
+ thread_stack_pcs(frames, vm_page_size/sizeof(vm_address_t) - 1, &num_frames);
} else {
- malloc_report(MALLOC_REPORT_NOLOG, "*** MallocCheckHeap: FAILED check at operation #%d\n", malloc_check_counter - 1);
- }
- if (frames) {
- unsigned index = 1;
- if (b) {
- _simple_sappend(b, "Stack for last operation where the malloc check succeeded: ");
- while (index < num_frames)
- _simple_sprintf(b, "%p ", (void*)frames[index++]);
- malloc_report(MALLOC_REPORT_NOLOG, "%s\n(Use 'atos' for a symbolic stack)\n", _simple_string(b));
- } else {
- /*
- * Should only get here if vm_allocate() can't get a single page of
- * memory, implying _simple_asl_log() would also fail. So we just
- * print to the file descriptor.
- */
- malloc_report(MALLOC_REPORT_NOLOG, "Stack for last operation where the malloc check succeeded: ");
- while (index < num_frames) {
- malloc_report(MALLOC_REPORT_NOLOG, "%p ", (void *)frames[index++]);
+ _SIMPLE_STRING b = _simple_salloc();
+ if (b)
+ _simple_sprintf(b, "*** MallocCheckHeap: FAILED check at %dth operation\n", malloc_check_counter-1);
+ else
+ _malloc_printf(MALLOC_PRINTF_NOLOG, "*** MallocCheckHeap: FAILED check at %dth operation\n", malloc_check_counter-1);
+ malloc_printf("*** MallocCheckHeap: FAILED check at %dth operation\n", malloc_check_counter-1);
+ if (frames) {
+ unsigned index = 1;
+ if (b) {
+ _simple_sappend(b, "Stack for last operation where the malloc check succeeded: ");
+ while (index < num_frames) _simple_sprintf(b, "%p ", frames[index++]);
+ malloc_printf("%s\n(Use 'atos' for a symbolic stack)\n", _simple_string(b));
+ } else {
+ /*
+ * Should only get here if vm_allocate() can't get a single page of
+ * memory, implying _simple_asl_log() would also fail. So we just
+ * print to the file descriptor.
+ */
+ _malloc_printf(MALLOC_PRINTF_NOLOG, "Stack for last operation where the malloc check succeeded: ");
+ while (index < num_frames) _malloc_printf(MALLOC_PRINTF_NOLOG, "%p ", frames[index++]);
+ _malloc_printf(MALLOC_PRINTF_NOLOG, "\n(Use 'atos' for a symbolic stack)\n");
}
- malloc_report(MALLOC_REPORT_NOLOG, "\n(Use 'atos' for a symbolic stack)\n");
- }
- }
- if (malloc_check_each > 1) {
- unsigned recomm_each = (malloc_check_each > 10) ? malloc_check_each / 10 : 1;
- unsigned recomm_start =
- (malloc_check_counter > malloc_check_each + 1) ? malloc_check_counter - 1 - malloc_check_each : 1;
- malloc_report(MALLOC_REPORT_NOLOG,
- "*** Recommend using 'setenv MallocCheckHeapStart %d; setenv MallocCheckHeapEach %d' to narrow down failure\n",
- recomm_start, recomm_each);
- }
-
- if (b) {
- _simple_sfree(b);
- }
-
- // Use malloc_vreport() to:
- // * report the error
- // * call malloc_error_break() for a breakpoint
- // * sleep or stop for debug
- // * set the crash message and crash if malloc_check_abort is set.
- unsigned sleep_time = 0;
- uint32_t report_flags = ASL_LEVEL_ERR | MALLOC_REPORT_DEBUG | MALLOC_REPORT_NOLOG;
- if (malloc_check_abort) {
- report_flags |= MALLOC_REPORT_CRASH;
- } else {
+ }
+ if (malloc_check_each > 1) {
+ unsigned recomm_each = (malloc_check_each > 10) ? malloc_check_each/10 : 1;
+ unsigned recomm_start = (malloc_check_counter > malloc_check_each+1) ? malloc_check_counter-1-malloc_check_each : 1;
+ malloc_printf("*** Recommend using 'setenv MallocCheckHeapStart %d; setenv MallocCheckHeapEach %d' to narrow down failure\n", recomm_start, recomm_each);
+ }
+ if (malloc_check_abort) {
+ CRSetCrashLogMessage(b ? _simple_string(b) : "*** MallocCheckHeap: FAILED check");
+ abort();
+ } else if (b)
+ _simple_sfree(b);
if (malloc_check_sleep > 0) {
- malloc_report(ASL_LEVEL_NOTICE, "*** Will sleep for %d seconds to leave time to attach\n", malloc_check_sleep);
- sleep_time = malloc_check_sleep;
+ _malloc_printf(ASL_LEVEL_NOTICE, "*** Sleeping for %d seconds to leave time to attach\n",
+ malloc_check_sleep);
+ sleep(malloc_check_sleep);
} else if (malloc_check_sleep < 0) {
- malloc_report(ASL_LEVEL_NOTICE, "*** Will sleep once for %d seconds to leave time to attach\n", -malloc_check_sleep);
- sleep_time = -malloc_check_sleep;
+ _malloc_printf(ASL_LEVEL_NOTICE, "*** Sleeping once for %d seconds to leave time to attach\n",
+ -malloc_check_sleep);
+ sleep(-malloc_check_sleep);
malloc_check_sleep = 0;
}
}
- va_list ap;
- va_start(ap, fmt);
- malloc_vreport(report_flags, sleep_time, msg, NULL, fmt, ap);
- va_end(ap);
-}
-
-/********* Block creation and manipulation ************/
-
-__attribute__((cold, noinline))
-static void
-internal_check(void)
-{
- if (malloc_check_counter++ < malloc_check_start) {
- return;
- }
- if (malloc_zone_check(NULL)) {
- if (!frames) {
- vm_allocate(mach_task_self(), (void *)&frames, vm_page_size, 1);
- }
- thread_stack_pcs(frames, (unsigned)(vm_page_size / sizeof(vm_address_t) - 1), &num_frames);
- }
malloc_check_start += malloc_check_each;
}
-__options_decl(malloc_zone_options_t, unsigned, {
- MZ_NONE = 0x0,
- MZ_POSIX = 0x1,
- MZ_C11 = 0x2,
-});
-
-static inline void
-malloc_set_errno_fast(malloc_zone_options_t mzo, int err)
-{
- if (mzo & MZ_POSIX) {
-#if TARGET_OS_SIMULATOR
- errno = err;
-#else
- (*_pthread_errno_address_direct()) = err;
-#endif
- }
-}
-
-MALLOC_NOINLINE
-static void *
-_malloc_zone_malloc(malloc_zone_t *zone, size_t size, malloc_zone_options_t mzo)
-{
- MALLOC_TRACE(TRACE_malloc | DBG_FUNC_START, (uintptr_t)zone, size, 0, 0);
-
- void *ptr = NULL;
-
- if (malloc_check_start) {
- internal_check();
- }
- if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
- goto out;
- }
-
- ptr = zone->malloc(zone, size); // if lite zone is passed in then we still call the lite methods
-
- if (os_unlikely(malloc_logger)) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
- }
-
- MALLOC_TRACE(TRACE_malloc | DBG_FUNC_END, (uintptr_t)zone, size, (uintptr_t)ptr, 0);
-out:
- if (os_unlikely(ptr == NULL)) {
- malloc_set_errno_fast(mzo, ENOMEM);
- }
- return ptr;
-}
-
void *
-malloc_zone_malloc(malloc_zone_t *zone, size_t size)
-{
- return _malloc_zone_malloc(zone, size, MZ_NONE);
-}
-
-MALLOC_NOINLINE
-static void *
-_malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size,
- malloc_zone_options_t mzo)
-{
- MALLOC_TRACE(TRACE_calloc | DBG_FUNC_START, (uintptr_t)zone, num_items, size, 0);
-
- void *ptr;
- if (malloc_check_start) {
- internal_check();
- }
-
- ptr = zone->calloc(zone, num_items, size);
-
- if (os_unlikely(malloc_logger)) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE | MALLOC_LOG_TYPE_CLEARED, (uintptr_t)zone,
- (uintptr_t)(num_items * size), 0, (uintptr_t)ptr, 0);
- }
-
- MALLOC_TRACE(TRACE_calloc | DBG_FUNC_END, (uintptr_t)zone, num_items, size, (uintptr_t)ptr);
- if (os_unlikely(ptr == NULL)) {
- malloc_set_errno_fast(mzo, ENOMEM);
- }
- return ptr;
-}
-
-void *
-malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size)
-{
- return _malloc_zone_calloc(zone, num_items, size, MZ_NONE);
-}
-
-MALLOC_NOINLINE
-static void *
-_malloc_zone_valloc(malloc_zone_t *zone, size_t size, malloc_zone_options_t mzo)
-{
- MALLOC_TRACE(TRACE_valloc | DBG_FUNC_START, (uintptr_t)zone, size, 0, 0);
-
- void *ptr = NULL;
- if (malloc_check_start) {
- internal_check();
- }
- if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
- goto out;
- }
-
- ptr = zone->valloc(zone, size);
-
- if (os_unlikely(malloc_logger)) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
- }
-
- MALLOC_TRACE(TRACE_valloc | DBG_FUNC_END, (uintptr_t)zone, size, (uintptr_t)ptr, 0);
-out:
- if (os_unlikely(ptr == NULL)) {
- malloc_set_errno_fast(mzo, ENOMEM);
- }
- return ptr;
-}
-
-void *
-malloc_zone_valloc(malloc_zone_t *zone, size_t size)
-{
- return _malloc_zone_valloc(zone, size, MZ_NONE);
-}
-
-void *
-malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size)
-{
- MALLOC_TRACE(TRACE_realloc | DBG_FUNC_START, (uintptr_t)zone, (uintptr_t)ptr, size, 0);
-
- void *new_ptr;
- if (malloc_check_start) {
+malloc_zone_malloc(malloc_zone_t *zone, size_t size) {
+ void *ptr;
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
return NULL;
}
-
+ ptr = zone->malloc(zone, size);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
+ return ptr;
+}
+
+void *
+malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size) {
+ void *ptr;
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ internal_check();
+ }
+ if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
+ return NULL;
+ }
+ ptr = zone->calloc(zone, num_items, size);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE | MALLOC_LOG_TYPE_CLEARED, (uintptr_t)zone, (uintptr_t)(num_items * size), 0,
+ (uintptr_t)ptr, 0);
+ return ptr;
+}
+
+void *
+malloc_zone_valloc(malloc_zone_t *zone, size_t size) {
+ void *ptr;
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ internal_check();
+ }
+ if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
+ return NULL;
+ }
+ ptr = zone->valloc(zone, size);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
+ return ptr;
+}
+
+void *
+malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size) {
+ void *new_ptr;
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ internal_check();
+ }
+ if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
+ return NULL;
+ }
new_ptr = zone->realloc(zone, ptr, size);
-
- if (os_unlikely(malloc_logger)) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone,
- (uintptr_t)ptr, (uintptr_t)size, (uintptr_t)new_ptr, 0);
- }
- MALLOC_TRACE(TRACE_realloc | DBG_FUNC_END, (uintptr_t)zone, (uintptr_t)ptr, size, (uintptr_t)new_ptr);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, (uintptr_t)size,
+ (uintptr_t)new_ptr, 0);
return new_ptr;
}
void
-malloc_zone_free(malloc_zone_t *zone, void *ptr)
-{
- MALLOC_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, (ptr) ? *(uintptr_t*)ptr : 0, 0);
-
- if (os_unlikely(malloc_logger)) {
+malloc_zone_free(malloc_zone_t *zone, void *ptr) {
+ if (malloc_logger)
malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, 0, 0, 0);
- }
- if (malloc_check_start) {
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
-
zone->free(zone, ptr);
}
static void
-malloc_zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size)
-{
- MALLOC_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, size, (ptr && size) ? *(uintptr_t*)ptr : 0);
-
- if (os_unlikely(malloc_logger)) {
+malloc_zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size) {
+ if (malloc_logger)
malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, 0, 0, 0);
- }
- if (malloc_check_start) {
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
-
zone->free_definite_size(zone, ptr, size);
}
malloc_zone_t *
-malloc_zone_from_ptr(const void *ptr)
-{
- if (!ptr) {
+malloc_zone_from_ptr(const void *ptr) {
+ if (!ptr)
return NULL;
- } else {
+ else
return find_registered_zone(ptr, NULL);
- }
-}
-
-MALLOC_NOINLINE
-static void *
-_malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size,
- malloc_zone_options_t mzo)
-{
- MALLOC_TRACE(TRACE_memalign | DBG_FUNC_START, (uintptr_t)zone, alignment, size, 0);
-
- void *ptr = NULL;
- int err = ENOMEM;
- if (zone->version < 5) { // Version must be >= 5 to look at the new memalign field.
- goto out;
- }
- if (malloc_check_start) {
+}
+
+void *
+malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size) {
+ void *ptr;
+ if (zone->version < 5) // Version must be >= 5 to look at the new memalign field.
+ return NULL;
+ if (!(zone->memalign))
+ return NULL;
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
- goto out;
- }
- if (alignment < sizeof(void *) || // excludes 0 == alignment
- 0 != (alignment & (alignment - 1))) { // relies on sizeof(void *) being a power of two.
- err = EINVAL;
- goto out;
- }
- if ((mzo & MZ_C11) && (size & (alignment - 1)) != 0) { /* C11 requires size to be a multiple of alignment */
- err = EINVAL;
- goto out;
- }
-
- if (!(zone->memalign)) {
- goto out;
+ return NULL;
+ }
+ if (alignment < sizeof( void *) || // excludes 0 == alignment
+ 0 != (alignment & (alignment - 1))) { // relies on sizeof(void *) being a power of two.
+ return NULL;
}
ptr = zone->memalign(zone, alignment, size);
-
- if (os_unlikely(malloc_logger)) {
+ if (malloc_logger)
malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
- }
-
- MALLOC_TRACE(TRACE_memalign | DBG_FUNC_END, (uintptr_t)zone, alignment, size, (uintptr_t)ptr);
-
-out:
- if (os_unlikely(ptr == NULL)) {
- if (mzo & MZ_POSIX) {
- malloc_set_errno_fast(mzo, err);
- }
- }
return ptr;
}
-void *
-malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
-{
- return _malloc_zone_memalign(zone, alignment, size, MZ_NONE);
-}
-
-boolean_t
-malloc_zone_claimed_address(malloc_zone_t *zone, void *ptr)
-{
- if (!ptr) {
- // NULL is not a member of any zone.
- return false;
- }
-
- if (malloc_check_start) {
- internal_check();
- }
-
- if (zone->version < 10 || !zone->claimed_address) {
- // For zones that have not implemented claimed_address, we always have
- // to return true to avoid a false negative.
- return true;
- }
-
- return zone->claimed_address(zone, ptr);
-}
-
/********* Functions for zone implementors ************/
void
-malloc_zone_register(malloc_zone_t *zone)
-{
+malloc_zone_register(malloc_zone_t *zone) {
MALLOC_LOCK();
- malloc_zone_register_while_locked(zone, false);
+ malloc_zone_register_while_locked(zone);
MALLOC_UNLOCK();
}
void
-malloc_zone_unregister(malloc_zone_t *z)
-{
- unsigned index;
-
- if (malloc_num_zones == 0) {
+malloc_zone_unregister(malloc_zone_t *z) {
+ unsigned index;
+
+ if (malloc_num_zones == 0)
return;
- }
MALLOC_LOCK();
for (index = 0; index < malloc_num_zones; ++index) {
- if (z != malloc_zones[index]) {
+ if (z != malloc_zones[index])
continue;
- }
// Modify the page to be allow write access, so that we can update the
// malloc_zones array.
@@ -1867,114 +952,155 @@
mprotect(malloc_zones, protect_size, PROT_READ);
- // MAX(num_zones, 1) retains the fast path in find_registered_zone() for zone 0 even
- // if it is a custom zone, e.g., ASan and user zones.
- initial_num_zones = MAX(MIN(malloc_num_zones, initial_num_zones), 1);
-
// Exchange the roles of the FRZ counters. The counter that has captured the number of threads presently
- // executing *inside* find_registered_zone is swapped with the counter drained to zero last time through.
+ // executing *inside* find_regiatered_zone is swapped with the counter drained to zero last time through.
// The former is then allowed to drain to zero while this thread yields.
- int32_t volatile *p = pFRZCounterLive;
+ int *p = pFRZCounterLive;
pFRZCounterLive = pFRZCounterDrain;
pFRZCounterDrain = p;
- OSMemoryBarrier(); // Full memory barrier
-
- while (0 != *pFRZCounterDrain) {
- yield();
- }
+ __sync_synchronize(); // Full memory barrier
+
+ while (0 != *pFRZCounterDrain) { yield(); }
MALLOC_UNLOCK();
return;
}
MALLOC_UNLOCK();
- malloc_report(ASL_LEVEL_ERR, "*** malloc_zone_unregister() failed for %p\n", z);
-}
-
-void
-malloc_set_zone_name(malloc_zone_t *z, const char *name)
-{
+ malloc_printf("*** malloc_zone_unregister() failed for %p\n", z);
+}
+
+void
+malloc_set_zone_name(malloc_zone_t *z, const char *name) {
+ char *newName;
+
mprotect(z, sizeof(malloc_zone_t), PROT_READ | PROT_WRITE);
if (z->zone_name) {
- malloc_zone_t *old_zone = find_registered_zone(z->zone_name, NULL);
- if (old_zone) {
- malloc_zone_free(old_zone, (char *)z->zone_name);
- }
+ free((char *)z->zone_name);
z->zone_name = NULL;
}
if (name) {
size_t buflen = strlen(name) + 1;
- if (_dyld_is_memory_immutable(name, buflen)) {
- z->zone_name = name;
+ newName = malloc_zone_malloc(z, buflen);
+ if (newName) {
+ strlcpy(newName, name, buflen);
+ z->zone_name = (const char *)newName;
} else {
- char *name_copy = _malloc_zone_malloc(z, buflen, MZ_NONE);
- if (name_copy) {
- strlcpy(name_copy, name, buflen);
- z->zone_name = name_copy;
- }
+ z->zone_name = NULL;
}
}
mprotect(z, sizeof(malloc_zone_t), PROT_READ);
}
const char *
-malloc_get_zone_name(malloc_zone_t *zone)
+malloc_get_zone_name(malloc_zone_t *zone) {
+ return zone->zone_name;
+}
+
+/*
+ * XXX malloc_printf now uses _simple_*printf. It only deals with a
+ * subset of printf format specifiers, but it doesn't call malloc.
+ */
+
+__attribute__((visibility("hidden")))
+void
+_malloc_vprintf(int flags, const char *format, va_list ap)
{
- return zone->zone_name;
-}
-
+ _SIMPLE_STRING b;
+
+ if (_malloc_no_asl_log || (flags & MALLOC_PRINTF_NOLOG) || (b = _simple_salloc()) == NULL) {
+ if (!(flags & MALLOC_PRINTF_NOPREFIX)) {
+ void *self = _os_tsd_get_direct(__TSD_THREAD_SELF);
+ _simple_dprintf(malloc_debug_file, "%s(%d,%p) malloc: ", getprogname(), getpid(), self);
+ }
+ _simple_vdprintf(malloc_debug_file, format, ap);
+ return;
+ }
+ if (!(flags & MALLOC_PRINTF_NOPREFIX)) {
+ void *self = _os_tsd_get_direct(__TSD_THREAD_SELF);
+ _simple_sprintf(b, "%s(%d,%p) malloc: ", getprogname(), getpid(), self);
+ }
+ _simple_vsprintf(b, format, ap);
+ _simple_put(b, malloc_debug_file);
+ _simple_asl_log(flags & MALLOC_PRINTF_LEVEL_MASK, Malloc_Facility, _simple_string(b));
+ _simple_sfree(b);
+}
+
+__attribute__((visibility("hidden")))
+void
+_malloc_printf(int flags, const char *format, ...)
+{
+ va_list ap;
+
+ va_start(ap, format);
+ _malloc_vprintf(flags, format, ap);
+ va_end(ap);
+}
+
+void
+malloc_printf(const char *format, ...)
+{
+ va_list ap;
+
+ va_start(ap, format);
+ _malloc_vprintf(ASL_LEVEL_ERR, format, ap);
+ va_end(ap);
+}
/********* Generic ANSI callouts ************/
void *
-malloc(size_t size)
-{
- return _malloc_zone_malloc(default_zone, size, MZ_POSIX);
+malloc(size_t size) {
+ void *retval;
+ retval = malloc_zone_malloc(inline_malloc_default_zone(), size);
+ if (retval == NULL) {
+ errno = ENOMEM;
+ }
+ return retval;
}
void *
-aligned_alloc(size_t alignment, size_t size)
-{
- return _malloc_zone_memalign(default_zone, alignment, size,
- MZ_POSIX | MZ_C11);
-}
-
-void *
-calloc(size_t num_items, size_t size)
-{
- return _malloc_zone_calloc(default_zone, num_items, size, MZ_POSIX);
-}
-
-void
-free(void *ptr)
-{
- malloc_zone_t *zone;
- size_t size;
- if (!ptr) {
+calloc(size_t num_items, size_t size) {
+ void *retval;
+ retval = malloc_zone_calloc(inline_malloc_default_zone(), num_items, size);
+ if (retval == NULL) {
+ errno = ENOMEM;
+ }
+ return retval;
+}
+
+void
+free(void *ptr) {
+ malloc_zone_t *zone;
+ size_t size;
+ if (!ptr)
return;
- }
-
zone = find_registered_zone(ptr, &size);
if (!zone) {
- int flags = MALLOC_REPORT_DEBUG | MALLOC_REPORT_NOLOG;
- if ((malloc_debug_flags & (MALLOC_ABORT_ON_CORRUPTION | MALLOC_ABORT_ON_ERROR))) {
- flags = MALLOC_REPORT_CRASH | MALLOC_REPORT_NOLOG;
- }
- malloc_report(flags,
- "*** error for object %p: pointer being freed was not allocated\n", ptr);
- } else if (zone->version >= 6 && zone->free_definite_size) {
+ malloc_printf("*** error for object %p: pointer being freed was not allocated\n"
+ "*** set a breakpoint in malloc_error_break to debug\n", ptr);
+ malloc_error_break();
+ if ((malloc_debug_flags & (SCALABLE_MALLOC_ABORT_ON_CORRUPTION|SCALABLE_MALLOC_ABORT_ON_ERROR))) {
+ _SIMPLE_STRING b = _simple_salloc();
+ if (b) {
+ _simple_sprintf(b, "*** error for object %p: pointer being freed was not allocated\n", ptr);
+ CRSetCrashLogMessage(_simple_string(b));
+ } else {
+ CRSetCrashLogMessage("*** error: pointer being freed was not allocated\n");
+ }
+ abort();
+ }
+ } else if (zone->version >= 6 && zone->free_definite_size)
malloc_zone_free_definite_size(zone, ptr, size);
- } else {
+ else
malloc_zone_free(zone, ptr);
- }
}
void *
-realloc(void *in_ptr, size_t new_size)
-{
- void *retval = NULL;
- void *old_ptr;
- malloc_zone_t *zone;
+realloc(void *in_ptr, size_t new_size) {
+ void *retval = NULL;
+ void *old_ptr;
+ malloc_zone_t *zone;
// SUSv3: "If size is 0 and ptr is not a null pointer, the object
// pointed to is freed. If the space cannot be allocated, the object
@@ -1986,22 +1112,29 @@
// size." So we only free the original memory if the allocation succeeds.
old_ptr = (new_size == 0) ? NULL : in_ptr;
if (!old_ptr) {
- retval = malloc_zone_malloc(default_zone, new_size);
+ retval = malloc_zone_malloc(inline_malloc_default_zone(), new_size);
} else {
zone = find_registered_zone(old_ptr, NULL);
if (!zone) {
- int flags = MALLOC_REPORT_DEBUG | MALLOC_REPORT_NOLOG;
- if (malloc_debug_flags & (MALLOC_ABORT_ON_CORRUPTION | MALLOC_ABORT_ON_ERROR)) {
- flags = MALLOC_REPORT_CRASH | MALLOC_REPORT_NOLOG;
+ malloc_printf("*** error for object %p: pointer being realloc'd was not allocated\n"
+ "*** set a breakpoint in malloc_error_break to debug\n", old_ptr);
+ malloc_error_break();
+ if ((malloc_debug_flags & (SCALABLE_MALLOC_ABORT_ON_CORRUPTION|SCALABLE_MALLOC_ABORT_ON_ERROR))) {
+ _SIMPLE_STRING b = _simple_salloc();
+ if (b) {
+ _simple_sprintf(b, "*** error for object %p: pointer being realloc'd was not allocated\n", old_ptr);
+ CRSetCrashLogMessage(_simple_string(b));
+ } else {
+ CRSetCrashLogMessage("*** error: pointer being realloc'd was not allocated\n");
+ }
+ abort();
}
- malloc_report(flags, "*** error for object %p: pointer being realloc'd was not allocated\n", in_ptr);
} else {
retval = malloc_zone_realloc(zone, old_ptr, new_size);
}
}
-
if (retval == NULL) {
- malloc_set_errno_fast(MZ_POSIX, ENOMEM);
+ errno = ENOMEM;
} else if (new_size == 0) {
free(in_ptr);
}
@@ -2009,34 +1142,35 @@
}
void *
-valloc(size_t size)
-{
- return _malloc_zone_valloc(default_zone, size, MZ_POSIX);
+valloc(size_t size) {
+ void *retval;
+ malloc_zone_t *zone = inline_malloc_default_zone();
+ retval = malloc_zone_valloc(zone, size);
+ if (retval == NULL) {
+ errno = ENOMEM;
+ }
+ return retval;
}
extern void
-vfree(void *ptr)
-{
+vfree(void *ptr) {
free(ptr);
}
size_t
-malloc_size(const void *ptr)
-{
- size_t size = 0;
-
- if (!ptr) {
+malloc_size(const void *ptr) {
+ size_t size = 0;
+
+ if (!ptr)
return size;
- }
(void)find_registered_zone(ptr, &size);
return size;
}
size_t
-malloc_good_size(size_t size)
-{
- malloc_zone_t *zone = default_zone;
+malloc_good_size (size_t size) {
+ malloc_zone_t *zone = inline_malloc_default_zone();
return zone->introspect->good_size(zone, size);
}
@@ -2059,18 +1193,18 @@
int
posix_memalign(void **memptr, size_t alignment, size_t size)
{
- void *retval;
+ void *retval;
/* POSIX is silent on NULL == memptr !?! */
- retval = malloc_zone_memalign(default_zone, alignment, size);
+ retval = malloc_zone_memalign(inline_malloc_default_zone(), alignment, size);
if (retval == NULL) {
// To avoid testing the alignment constraints redundantly, we'll rely on the
// test made in malloc_zone_memalign to vet each request. Only if that test fails
// and returns NULL, do we arrive here to detect the bogus alignment and give the
// required EINVAL return.
- if (alignment < sizeof(void *) || // excludes 0 == alignment
- 0 != (alignment & (alignment - 1))) { // relies on sizeof(void *) being a power of two.
+ if (alignment < sizeof( void *) || // excludes 0 == alignment
+ 0 != (alignment & (alignment - 1))) { // relies on sizeof(void *) being a power of two.
return EINVAL;
}
return ENOMEM;
@@ -2080,73 +1214,10 @@
}
}
-boolean_t
-malloc_claimed_address(void *ptr)
-{
- // We need to check with each registered zone whether it claims "ptr".
- // Use logic similar to that in find_registered_zone().
- if (malloc_num_zones == 0) {
- return false;
- }
-
- // Start with the lite zone, if it's in use.
- if (lite_zone && malloc_zone_claimed_address(lite_zone, ptr)) {
- return true;
- }
-
- // Next, try the initial zones.
- for (uint32_t i = 0; i < initial_num_zones; i++) {
- if (malloc_zone_claimed_address(malloc_zones[i], ptr)) {
- return true;
- }
- }
-
- // Try all the other zones. Increment the FRZ barrier so that we can
- // walk the zones array without a lock (see find_registered_zone() for
- // the details).
- int32_t volatile *pFRZCounter = pFRZCounterLive;
- OSAtomicIncrement32Barrier(pFRZCounter);
-
- int32_t limit = *(int32_t volatile *)&malloc_num_zones;
- boolean_t result = false;
- for (uint32_t i = initial_num_zones; i < limit; i++) {
- malloc_zone_t *zone = malloc_zones[i];
- if (malloc_zone_claimed_address(zone, ptr)) {
- result = true;
- break;
- }
- }
-
- OSAtomicDecrement32Barrier(pFRZCounter);
- return result;
-}
-
-void *
-reallocarray(void * in_ptr, size_t nmemb, size_t size){
- size_t alloc_size;
- if (os_mul_overflow(nmemb, size, &alloc_size)){
- malloc_set_errno_fast(MZ_POSIX, ENOMEM);
+static malloc_zone_t *
+find_registered_purgeable_zone(void *ptr) {
+ if (!ptr)
return NULL;
- }
- return realloc(in_ptr, alloc_size);
-}
-
-void *
-reallocarrayf(void * in_ptr, size_t nmemb, size_t size){
- size_t alloc_size;
- if (os_mul_overflow(nmemb, size, &alloc_size)){
- malloc_set_errno_fast(MZ_POSIX, ENOMEM);
- return NULL;
- }
- return reallocf(in_ptr, alloc_size);
-}
-
-static malloc_zone_t *
-find_registered_purgeable_zone(void *ptr)
-{
- if (!ptr) {
- return NULL;
- }
/*
* Look for a zone which contains ptr. If that zone does not have the purgeable malloc flag
@@ -2159,25 +1230,21 @@
/* FIXME: would really like a zone->introspect->flags->purgeable check, but haven't determined
* binary compatibility impact of changing the introspect struct yet. */
- if (!zone) {
+ if (!zone)
return NULL;
- }
/* Check to make sure pointer is page aligned and size is multiple of page size */
- if ((size < vm_page_size) || ((size % vm_page_size) != 0)) {
+ if ((size < vm_page_size) || ((size % vm_page_size) != 0))
return NULL;
- }
return zone;
}
void
-malloc_make_purgeable(void *ptr)
-{
+malloc_make_purgeable(void *ptr) {
malloc_zone_t *zone = find_registered_purgeable_zone(ptr);
- if (!zone) {
+ if (!zone)
return;
- }
int state = VM_PURGABLE_VOLATILE;
vm_purgable_control(mach_task_self(), (vm_address_t)ptr, VM_PURGABLE_SET_STATE, &state);
@@ -2187,57 +1254,21 @@
/* Returns true if ptr is valid. Ignore the return value from vm_purgeable_control and only report
* state. */
int
-malloc_make_nonpurgeable(void *ptr)
-{
+malloc_make_nonpurgeable(void *ptr) {
malloc_zone_t *zone = find_registered_purgeable_zone(ptr);
- if (!zone) {
+ if (!zone)
return 0;
- }
int state = VM_PURGABLE_NONVOLATILE;
vm_purgable_control(mach_task_self(), (vm_address_t)ptr, VM_PURGABLE_SET_STATE, &state);
- if (state == VM_PURGABLE_EMPTY) {
+ if (state == VM_PURGABLE_EMPTY)
return EFAULT;
- }
return 0;
}
-void
-malloc_enter_process_memory_limit_warn_mode(void)
-{
- // <rdar://problem/25063714>
-}
-
-
-
-// Note that malloc_memory_event_handler is not thread-safe, and we are relying on the callers of this for synchronization
-void
-malloc_memory_event_handler(unsigned long event)
-{
- if (event & NOTE_MEMORYSTATUS_PRESSURE_WARN) {
- malloc_zone_pressure_relief(0, 0);
- }
-
- if ((event & NOTE_MEMORYSTATUS_MSL_STATUS) != 0 && (event & ~NOTE_MEMORYSTATUS_MSL_STATUS) == 0) {
- malloc_register_stack_logger();
- }
-
-#if ENABLE_MEMORY_RESOURCE_EXCEPTION_HANDLING
- if (event & (NOTE_MEMORYSTATUS_PROC_LIMIT_WARN | NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL | NOTE_MEMORYSTATUS_PRESSURE_CRITICAL)) {
- malloc_register_stack_logger();
- }
-#endif // ENABLE_MEMORY_RESOURCE_EXCEPTION_HANDLING
-
- if (msl.handle_memory_event) {
- // Let MSL see the event.
- msl.handle_memory_event(event);
- }
-}
-
-size_t
-malloc_zone_pressure_relief(malloc_zone_t *zone, size_t goal)
+size_t malloc_zone_pressure_relief(malloc_zone_t *zone, size_t goal)
{
if (!zone) {
unsigned index = 0;
@@ -2247,30 +1278,25 @@
MALLOC_LOCK();
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
- if (zone->version < 8) {
+ if (zone->version < 8)
continue;
- }
- if (NULL == zone->pressure_relief) {
+ if (NULL == zone->pressure_relief)
continue;
- }
- if (0 == goal) { /* Greedy */
+ if (0 == goal) /* Greedy */
total += zone->pressure_relief(zone, 0);
- } else if (goal > total) {
+ else if (goal > total)
total += zone->pressure_relief(zone, goal - total);
- } else { /* total >= goal */
+ else /* total >= goal */
break;
- }
}
MALLOC_UNLOCK();
return total;
} else {
// Assumes zone is not destroyed for the duration of this call
- if (zone->version < 8) {
+ if (zone->version < 8)
return 0;
- }
- if (NULL == zone->pressure_relief) {
+ if (NULL == zone->pressure_relief)
return 0;
- }
return zone->pressure_relief(zone, goal);
}
}
@@ -2278,21 +1304,18 @@
/********* Batch methods ************/
unsigned
-malloc_zone_batch_malloc(malloc_zone_t *zone, size_t size, void **results, unsigned num_requested)
-{
- if (!zone->batch_malloc) {
+malloc_zone_batch_malloc(malloc_zone_t *zone, size_t size, void **results, unsigned num_requested) {
+ unsigned (*batch_malloc)(malloc_zone_t *, size_t, void **, unsigned) = zone-> batch_malloc;
+ if (! batch_malloc)
return 0;
- }
- if (malloc_check_start) {
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
- unsigned batched = zone->batch_malloc(zone, size, results, num_requested);
-
- if (os_unlikely(malloc_logger)) {
- unsigned index = 0;
+ unsigned batched = batch_malloc(zone, size, results, num_requested);
+ if (malloc_logger) {
+ unsigned index = 0;
while (index < batched) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0,
- (uintptr_t)results[index], 0);
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)results[index], 0);
index++;
}
}
@@ -2300,27 +1323,24 @@
}
void
-malloc_zone_batch_free(malloc_zone_t *zone, void **to_be_freed, unsigned num)
-{
- if (malloc_check_start) {
+malloc_zone_batch_free(malloc_zone_t *zone, void **to_be_freed, unsigned num) {
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
- if (os_unlikely(malloc_logger)) {
- unsigned index = 0;
+ if (malloc_logger) {
+ unsigned index = 0;
while (index < num) {
- malloc_logger(
- MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)to_be_freed[index], 0, 0, 0);
+ malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)to_be_freed[index], 0, 0, 0);
index++;
}
}
-
- if (zone->batch_free) {
- zone->batch_free(zone, to_be_freed, num);
+ void (*batch_free)(malloc_zone_t *, void **, unsigned) = zone-> batch_free;
+ if (batch_free) {
+ batch_free(zone, to_be_freed, num);
} else {
- void (*free_fun)(malloc_zone_t *, void *) = zone->free;
-
+ void (*free_fun)(malloc_zone_t *, void *) = zone->free;
while (num--) {
- void *ptr = *to_be_freed++;
+ void *ptr = *to_be_freed++;
free_fun(zone, ptr);
}
}
@@ -2328,33 +1348,35 @@
/********* Functions for performance tools ************/
+static kern_return_t
+_malloc_default_reader(task_t task, vm_address_t address, vm_size_t size, void **ptr) {
+ *ptr = (void *)address;
+ return 0;
+}
+
kern_return_t
-malloc_get_all_zones(task_t task, memory_reader_t reader, vm_address_t **addresses, unsigned *count)
-{
- // Note that the 2 following addresses are not correct if the address of the target is different from your own. This notably
- // occurs if the address of System.framework is slid (e.g. different than at B & I )
- vm_address_t remote_malloc_zones = (vm_address_t)&malloc_zones;
- vm_address_t remote_malloc_num_zones = (vm_address_t)&malloc_num_zones;
- kern_return_t err;
- vm_address_t zones_address;
- vm_address_t *zones_address_ref;
- unsigned num_zones;
- unsigned *num_zones_ref;
- if (!reader) {
- reader = _malloc_default_reader;
- }
+malloc_get_all_zones(task_t task, memory_reader_t reader, vm_address_t **addresses, unsigned *count) {
+ // Note that the 2 following addresses are not correct if the address of the target is different from your own. This notably occurs if the address of System.framework is slid (e.g. different than at B & I )
+ vm_address_t remote_malloc_zones = (vm_address_t)&malloc_zones;
+ vm_address_t remote_malloc_num_zones = (vm_address_t)&malloc_num_zones;
+ kern_return_t err;
+ vm_address_t zones_address;
+ vm_address_t *zones_address_ref;
+ unsigned num_zones;
+ unsigned *num_zones_ref;
+ if (!reader) reader = _malloc_default_reader;
// printf("Read malloc_zones at address %p should be %p\n", &malloc_zones, malloc_zones);
err = reader(task, remote_malloc_zones, sizeof(void *), (void **)&zones_address_ref);
// printf("Read malloc_zones[%p]=%p\n", remote_malloc_zones, *zones_address_ref);
if (err) {
- malloc_report(ASL_LEVEL_ERR, "*** malloc_get_all_zones: error reading zones_address at %p\n", (void *)remote_malloc_zones);
+ malloc_printf("*** malloc_get_all_zones: error reading zones_address at %p\n", (unsigned)remote_malloc_zones);
return err;
}
zones_address = *zones_address_ref;
// printf("Reading num_zones at address %p\n", remote_malloc_num_zones);
err = reader(task, remote_malloc_num_zones, sizeof(unsigned), (void **)&num_zones_ref);
if (err) {
- malloc_report(ASL_LEVEL_ERR, "*** malloc_get_all_zones: error reading num_zones at %p\n", (void *)remote_malloc_num_zones);
+ malloc_printf("*** malloc_get_all_zones: error reading num_zones at %p\n", (unsigned)remote_malloc_num_zones);
return err;
}
num_zones = *num_zones_ref;
@@ -2363,7 +1385,7 @@
// printf("malloc_get_all_zones succesfully found %d zones\n", num_zones);
err = reader(task, zones_address, sizeof(malloc_zone_t *) * num_zones, (void **)addresses);
if (err) {
- malloc_report(ASL_LEVEL_ERR, "*** malloc_get_all_zones: error reading zones at %p\n", &zones_address);
+ malloc_printf("*** malloc_get_all_zones: error reading zones at %p\n", &zones_address);
return err;
}
// printf("malloc_get_all_zones succesfully read %d zones\n", num_zones);
@@ -2373,12 +1395,9 @@
/********* Debug helpers ************/
void
-malloc_zone_print_ptr_info(void *ptr)
-{
- malloc_zone_t *zone;
- if (!ptr) {
- return;
- }
+malloc_zone_print_ptr_info(void *ptr) {
+ malloc_zone_t *zone;
+ if (!ptr) return;
zone = malloc_zone_from_ptr(ptr);
if (zone) {
printf("ptr %p in registered zone %p\n", ptr, zone);
@@ -2388,16 +1407,13 @@
}
boolean_t
-malloc_zone_check(malloc_zone_t *zone)
-{
- boolean_t ok = 1;
+malloc_zone_check(malloc_zone_t *zone) {
+ boolean_t ok = 1;
if (!zone) {
- unsigned index = 0;
+ unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
- if (!zone->introspect->check(zone)) {
- ok = 0;
- }
+ if (!zone->introspect->check(zone)) ok = 0;
}
} else {
ok = zone->introspect->check(zone);
@@ -2406,10 +1422,9 @@
}
void
-malloc_zone_print(malloc_zone_t *zone, boolean_t verbose)
-{
+malloc_zone_print(malloc_zone_t *zone, boolean_t verbose) {
if (!zone) {
- unsigned index = 0;
+ unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
zone->introspect->print(zone, verbose);
@@ -2420,14 +1435,13 @@
}
void
-malloc_zone_statistics(malloc_zone_t *zone, malloc_statistics_t *stats)
-{
+malloc_zone_statistics(malloc_zone_t *zone, malloc_statistics_t *stats) {
if (!zone) {
memset(stats, 0, sizeof(*stats));
- unsigned index = 0;
+ unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
- malloc_statistics_t this_stats;
+ malloc_statistics_t this_stats;
zone->introspect->statistics(zone, &this_stats);
stats->blocks_in_use += this_stats.blocks_in_use;
stats->size_in_use += this_stats.size_in_use;
@@ -2440,10 +1454,9 @@
}
void
-malloc_zone_log(malloc_zone_t *zone, void *address)
-{
+malloc_zone_log(malloc_zone_t *zone, void *address) {
if (!zone) {
- unsigned index = 0;
+ unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
zone->introspect->log(zone, address);
@@ -2455,61 +1468,51 @@
/********* Misc other entry points ************/
-void
-mag_set_thread_index(unsigned int index)
-{
- _os_cpu_number_override = index;
-#if CONFIG_NANOZONE
- nano_common_cpu_number_override_set();
-#endif // CONFIG_NANOZONE
-}
-
static void
-DefaultMallocError(int x)
-{
+DefaultMallocError(int x) {
#if USE_SLEEP_RATHER_THAN_ABORT
- malloc_report(ASL_LEVEL_ERR, "*** error %d\n", x);
+ malloc_printf("*** error %d\n", x);
sleep(3600);
#else
_SIMPLE_STRING b = _simple_salloc();
if (b) {
_simple_sprintf(b, "*** error %d", x);
- malloc_report(MALLOC_REPORT_NOLOG, "%s\n", _simple_string(b));
- _os_set_crash_log_message_dynamic(_simple_string(b));
+ malloc_printf("%s\n", _simple_string(b));
+ CRSetCrashLogMessage(_simple_string(b));
} else {
- malloc_report(MALLOC_REPORT_NOLOG, "*** error %d\n", x);
- _os_set_crash_log_message("*** DefaultMallocError called");
+ _malloc_printf(MALLOC_PRINTF_NOLOG, "*** error %d", x);
+ CRSetCrashLogMessage("*** DefaultMallocError called");
}
abort();
#endif
}
-void (*malloc_error(void (*func)(int)))(int)
-{
+void (*
+ malloc_error(void (*func)(int)))(int) {
return DefaultMallocError;
}
+/* Stack logging fork-handling prototypes */
+extern void __stack_logging_fork_prepare();
+extern void __stack_logging_fork_parent();
+extern void __stack_logging_fork_child();
+extern void __stack_logging_early_finished();
+
static void
-_malloc_lock_all(void (*callout)(void))
-{
+_malloc_lock_all(void (*callout)(void)) {
unsigned index = 0;
MALLOC_LOCK();
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_lock(zone);
}
- if (callout) {
- callout();
- }
+ callout();
}
static void
-_malloc_unlock_all(void (*callout)(void))
-{
+_malloc_unlock_all(void (*callout)(void)) {
unsigned index = 0;
- if (callout) {
- callout();
- }
+ callout();
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_unlock(zone);
@@ -2517,53 +1520,28 @@
MALLOC_UNLOCK();
}
-static void
-_malloc_reinit_lock_all(void (*callout)(void))
-{
- unsigned index = 0;
- if (callout) {
- callout();
- }
- while (index < malloc_num_zones) {
- malloc_zone_t *zone = malloc_zones[index++];
- if (zone->version < 9) { // Version must be >= 9 to look at reinit_lock
- zone->introspect->force_unlock(zone);
- } else {
- zone->introspect->reinit_lock(zone);
- }
- }
- MALLOC_REINIT_LOCK();
-}
-
-
// Called prior to fork() to guarantee that malloc is not in any critical
// sections during the fork(); prevent any locks from being held by non-
// surviving threads after the fork.
void
-_malloc_fork_prepare(void)
-{
- return _malloc_lock_all(msl.fork_prepare);
+_malloc_fork_prepare(void) {
+ return _malloc_lock_all(&__stack_logging_fork_prepare);
}
// Called in the parent process after fork() to resume normal operation.
void
-_malloc_fork_parent(void)
-{
- return _malloc_unlock_all(msl.fork_parent);
+_malloc_fork_parent(void) {
+ return _malloc_unlock_all(&__stack_logging_fork_parent);
}
// Called in the child process after fork() to resume normal operation.
void
-_malloc_fork_child(void)
-{
+_malloc_fork_child(void) {
#if CONFIG_NANOZONE
- if (_malloc_entropy_initialized) {
- if (_malloc_engaged_nano == NANO_V2) {
- nanov2_forked_zone((nanozonev2_t *)initial_nano_zone);
- }
- }
+ if (_malloc_is_initialized && _malloc_engaged_nano)
+ nano_forked_zone(inline_malloc_default_zone());
#endif
- return _malloc_reinit_lock_all(msl.fork_child);
+ return _malloc_unlock_all(&__stack_logging_fork_child);
}
/*
@@ -2584,50 +1562,42 @@
m.chunks_used = s.blocks_in_use;
m.bytes_used = s.size_in_use;
m.chunks_free = 0;
- m.bytes_free = m.bytes_total - m.bytes_used; /* isn't this somewhat obvious? */
-
- return (m);
+ m.bytes_free = m.bytes_total - m.bytes_used; /* isn't this somewhat obvious? */
+
+ return(m);
}
boolean_t
malloc_zone_enable_discharge_checking(malloc_zone_t *zone)
{
- if (zone->version < 7) { // Version must be >= 7 to look at the new discharge checking fields.
+ if (zone->version < 7) // Version must be >= 7 to look at the new discharge checking fields.
return FALSE;
- }
- if (NULL == zone->introspect->enable_discharge_checking) {
+ if (NULL == zone->introspect->enable_discharge_checking)
return FALSE;
- }
return zone->introspect->enable_discharge_checking(zone);
}
void
malloc_zone_disable_discharge_checking(malloc_zone_t *zone)
{
- if (zone->version < 7) { // Version must be >= 7 to look at the new discharge checking fields.
+ if (zone->version < 7) // Version must be >= 7 to look at the new discharge checking fields.
return;
- }
- if (NULL == zone->introspect->disable_discharge_checking) {
+ if (NULL == zone->introspect->disable_discharge_checking)
return;
- }
zone->introspect->disable_discharge_checking(zone);
}
void
malloc_zone_discharge(malloc_zone_t *zone, void *memory)
{
- if (NULL == zone) {
+ if (NULL == zone)
zone = malloc_zone_from_ptr(memory);
- }
- if (NULL == zone) {
+ if (NULL == zone)
return;
- }
- if (zone->version < 7) { // Version must be >= 7 to look at the new discharge checking fields.
+ if (zone->version < 7) // Version must be >= 7 to look at the new discharge checking fields.
return;
- }
- if (NULL == zone->introspect->discharge) {
+ if (NULL == zone->introspect->discharge)
return;
- }
zone->introspect->discharge(zone, memory);
}
@@ -2635,24 +1605,20 @@
malloc_zone_enumerate_discharged_pointers(malloc_zone_t *zone, void (^report_discharged)(void *memory, void *info))
{
if (!zone) {
- unsigned index = 0;
+ unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
- if (zone->version < 7) {
+ if (zone->version < 7)
continue;
- }
- if (NULL == zone->introspect->enumerate_discharged_pointers) {
+ if (NULL == zone->introspect->enumerate_discharged_pointers)
continue;
- }
zone->introspect->enumerate_discharged_pointers(zone, report_discharged);
}
} else {
- if (zone->version < 7) {
+ if (zone->version < 7)
return;
- }
- if (NULL == zone->introspect->enumerate_discharged_pointers) {
+ if (NULL == zone->introspect->enumerate_discharged_pointers)
return;
- }
zone->introspect->enumerate_discharged_pointers(zone, report_discharged);
}
}
@@ -2664,393 +1630,29 @@
#endif
void
-set_malloc_singlethreaded(boolean_t single)
-{
+set_malloc_singlethreaded(boolean_t single) {
static boolean_t warned = 0;
if (!warned) {
#if PHASE_OUT_OLD_MALLOC
- malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: set_malloc_singlethreaded(%d)\n", single);
+ malloc_printf("*** OBSOLETE: set_malloc_singlethreaded(%d)\n", single);
#endif
warned = 1;
}
}
void
-malloc_singlethreaded(void)
-{
+malloc_singlethreaded(void) {
static boolean_t warned = 0;
if (!warned) {
- malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: malloc_singlethreaded()\n");
+ malloc_printf("*** OBSOLETE: malloc_singlethreaded()\n");
warned = 1;
}
}
int
-malloc_debug(int level)
-{
- malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: malloc_debug()\n");
+malloc_debug(int level) {
+ malloc_printf("*** OBSOLETE: malloc_debug()\n");
return 0;
}
-#pragma mark -
-#pragma mark Malloc Stack Logging
-
-static bool _malloc_register_stack_logger(bool at_startup);
-
-/* this is called from libsystem during initialization. */
-static void
-stack_logging_early_finished(const struct _malloc_late_init *funcs)
-{
-#if !TARGET_OS_DRIVERKIT
- _dlopen = funcs->dlopen;
- _dlsym = funcs->dlsym;
-#endif
- if (funcs->version >= 2 && funcs->msl) {
- msl = *funcs->msl;
- }
- const char **env = (const char**) *_NSGetEnviron();
- for (const char **e = env; *e; e++) {
- if (0==strncmp(*e, "MallocStackLogging", 18)) {
- _malloc_register_stack_logger(true);
- if (msl.set_flags_from_environment) {
- msl.set_flags_from_environment(env);
- }
- break;
- }
- }
- if (msl.initialize) {
- msl.initialize();
- }
-}
-
-
-static os_once_t _register_msl_dylib_pred;
-
-static void
-register_msl_dylib(void *dylib)
-{
-#if TARGET_OS_DRIVERKIT
- set_msl_lite_hooks(msl.copy_msl_lite_hooks);
-#else
- if (!dylib) {
- return;
- }
- msld.dylib = dylib;
- msl.handle_memory_event = _dlsym(dylib, "msl_handle_memory_event");
- msl.stack_logging_locked = _dlsym(dylib, "msl_stack_logging_locked");
- msl.fork_prepare = _dlsym(dylib, "msl_fork_prepare");
- msl.fork_child = _dlsym(dylib, "msl_fork_child");
- msl.fork_parent = _dlsym(dylib, "msl_fork_parent");
- msl.turn_on_stack_logging = _dlsym(dylib, "msl_turn_on_stack_logging");
- msl.turn_off_stack_logging = _dlsym(dylib, "msl_turn_off_stack_logging");
- msl.set_flags_from_environment = _dlsym(dylib, "msl_set_flags_from_environment");
- msl.initialize = _dlsym(dylib, "msl_initialize");
-
-
- // TODO delete these ones
- msld.get_frames_for_address = _dlsym(dylib, "msl_get_frames_for_address");
- msld.stackid_for_vm_region = _dlsym(dylib, "msl_stackid_for_vm_region");
- msld.get_frames_for_stackid = _dlsym(dylib, "msl_get_frames_for_stackid");
- msld.uniquing_table_read_stack = _dlsym(dylib, "msl_uniquing_table_read_stack");
-
- void (*msl_copy_msl_lite_hooks) (struct _malloc_msl_lite_hooks_s *hooksp, size_t size);
- msl_copy_msl_lite_hooks = _dlsym(dylib, "msl_copy_msl_lite_hooks");
- if (msl_copy_msl_lite_hooks) {
- set_msl_lite_hooks(msl_copy_msl_lite_hooks);
- }
-#endif
-}
-
-MALLOC_EXPORT
-boolean_t
-malloc_register_stack_logger(void)
-{
- return _malloc_register_stack_logger(false);
-}
-
-static bool
-_malloc_register_stack_logger(bool at_startup)
-{
- void *dylib = NULL;
- if (malloc_quarantine_enabled && !at_startup) {
- return false;
- }
-#if !TARGET_OS_DRIVERKIT
- if (msl.handle_memory_event != NULL) {
- return true;
- }
- if (_dlopen == NULL) {
- return false;
- }
- dylib = _dlopen("/System/Library/PrivateFrameworks/MallocStackLogging.framework/MallocStackLogging", RTLD_GLOBAL);
- if (dylib == NULL) {
- return false;
- }
-#endif
- os_once(&_register_msl_dylib_pred, dylib, register_msl_dylib);
- if (!msl.handle_memory_event) {
- malloc_report(ASL_LEVEL_WARNING, "failed to load MallocStackLogging.framework\n");
- return false;
- }
- return true;
-}
-
-/* Symbolication.framework looks up this symbol by name inside libsystem_malloc.dylib. */
-uint64_t __mach_stack_logging_shared_memory_address = 0;
-
-
-#pragma mark -
-#pragma mark Malloc Stack Logging - Legacy stubs
-
-/*
- * legacy API for MallocStackLogging.
- *
- * TODO, deprecate this, move clients off it and delete it. Clients should move
- * to MallocStackLogging.framework for these APIs.
- */
-
-MALLOC_EXPORT
-boolean_t
-turn_on_stack_logging(stack_logging_mode_type mode)
-{
- malloc_register_stack_logger();
- if (!msl.turn_on_stack_logging) {
- return false;
- }
- return msl.turn_on_stack_logging(mode);
-}
-
-MALLOC_EXPORT
-void turn_off_stack_logging(void)
-{
- malloc_register_stack_logger();
- if (msl.turn_off_stack_logging) {
- msl.turn_off_stack_logging();
- }
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_start_reading(task_t task, vm_address_t shared_memory_address, boolean_t *uses_lite_mode)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return KERN_FAILURE;
- }
- kern_return_t (*f) (task_t task, vm_address_t shared_memory_address, boolean_t *uses_lite_mode);
- f = _dlsym(msld.dylib, "msl_start_reading");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task, shared_memory_address, uses_lite_mode);
-}
-
-
-//deprecated
-kern_return_t
-__mach_stack_logging_stop_reading(task_t task)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return KERN_FAILURE;
- }
- kern_return_t (*f) (task_t task);
- f = _dlsym(msld.dylib, "msl_stop_reading");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task);
-}
-
-kern_return_t
-__mach_stack_logging_get_frames(task_t task,
- mach_vm_address_t address,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count)
-{
- malloc_register_stack_logger();
- if (!msld.get_frames_for_address) {
- return KERN_FAILURE;
- }
- return msld.get_frames_for_address(task, address, stack_frames_buffer, max_stack_frames, count);
-}
-
-uint64_t
-__mach_stack_logging_stackid_for_vm_region(task_t task, mach_vm_address_t address)
-{
- malloc_register_stack_logger();
- if (!msld.stackid_for_vm_region) {
- return -1ull;
- }
- return msld.stackid_for_vm_region(task, address);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_frames_for_uniqued_stack(task_t task,
- uint64_t stack_identifier,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count)
-{
- malloc_register_stack_logger();
- if (!msld.get_frames_for_stackid) {
- return KERN_FAILURE;
- }
- return msld.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, NULL);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_get_frames_for_stackid(task_t task,
- uint64_t stack_identifier,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count,
- bool *last_frame_is_threadid)
-{
- malloc_register_stack_logger();
- if (!msld.get_frames_for_stackid) {
- return KERN_FAILURE;
- }
- return msld.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, last_frame_is_threadid);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_uniquing_table_read_stack(struct backtrace_uniquing_table *uniquing_table,
- uint64_t stackid,
- mach_vm_address_t *out_frames_buffer,
- uint32_t *out_frames_count,
- uint32_t max_frames)
-{
- malloc_register_stack_logger();
- if (!msld.uniquing_table_read_stack) {
- return KERN_FAILURE;
- }
- return msld.uniquing_table_read_stack(uniquing_table, stackid, out_frames_buffer, out_frames_count, max_frames);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_enumerate_records(task_t task,
- mach_vm_address_t address,
- void enumerator(mach_stack_logging_record_t, void *),
- void *context)
-{
- malloc_register_stack_logger();
- kern_return_t (*f) (task_t task,
- mach_vm_address_t address,
- void enumerator(mach_stack_logging_record_t, void *),
- void *context);
- if (!msld.dylib) {
- return KERN_FAILURE;
- }
- f = _dlsym(msld.dylib, "msl_disk_stack_logs_enumerate_from_task");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task, address, enumerator, context);
-}
-
-
-//deprecated
-struct backtrace_uniquing_table *
-__mach_stack_logging_copy_uniquing_table(task_t task)
-{
- malloc_register_stack_logger();
- struct backtrace_uniquing_table * (*f) (task_t task);
- if (!msld.dylib) {
- return NULL;
- }
- f = _dlsym(msld.dylib, "msl_uniquing_table_copy_from_task");
- if (!f) {
- return NULL;
- }
- return f(task);
-}
-
-//deprecated
-struct backtrace_uniquing_table *
-__mach_stack_logging_uniquing_table_copy_from_serialized(void *buffer, size_t size)
-{
- malloc_register_stack_logger();
- struct backtrace_uniquing_table * (*f) (void *buffer, size_t size);
- if (!msld.dylib) {
- return NULL;
- }
- f = _dlsym(msld.dylib, "msl_uniquing_table_copy_from_serialized");
- if (!f) {
- return NULL;
- }
- return f(buffer, size);
-}
-
-//deprecated
-void
-__mach_stack_logging_uniquing_table_release(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return;
- }
- void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msld.dylib, "msl_uniquing_table_release");
- if (f) {
- f(table);
- }
-}
-
-//deprecated
-void
-__mach_stack_logging_uniquing_table_retain(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return;
- }
- void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msld.dylib, "msl_uniquing_table_retain");
- if (f) {
- f(table);
- }
-}
-
-//deprecated
-extern
-size_t
-__mach_stack_logging_uniquing_table_sizeof(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- size_t (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msld.dylib, "msl_uniquing_table_retain");
- return f(table);
-}
-
-//deprecated
-void *
-__mach_stack_logging_uniquing_table_serialize(struct backtrace_uniquing_table *table, mach_vm_size_t *size)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return NULL;
- }
- void * (*f) (struct backtrace_uniquing_table *table, mach_vm_size_t *size);
- f = _dlsym(msld.dylib, "msl_uniquing_table_serialize");
- if (!f) {
- return NULL;
- }
- return f(table, size);
-}
-
-kern_return_t
-__mach_stack_logging_set_file_path(task_t task, char* file_path)
-{
- return KERN_SUCCESS;
-}
-
-/* WeChat references this, only god knows why. This symbol does nothing. */
-int stack_logging_enable_logging = 0;
-
/* vim: set noet:ts=4:sw=4:cindent: */