Loading...
--- libmalloc/libmalloc-317.100.9/src/malloc.c
+++ libmalloc/libmalloc-140.50.6/src/malloc.c
@@ -23,14 +23,47 @@
#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,
+#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
+#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
+
+/*
+ MAX_LITE_MALLOCS
+
+ If msl lite is turned on due to a memory resource exception use this value as the maximum
+ number of allocations allowed before msl lite is turned off. This prevents msl lite from being
+ enabled indefinitely if the process never reaches 100% of its jetsam limit.
+ See rdar://problem/25950426 for a discussion of how this number was determined.
+ */
+
+#define MAX_LITE_MALLOCS 100000000
+
+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)
static _malloc_lock_s _malloc_lock = _MALLOC_LOCK_INIT;
#define MALLOC_LOCK() _malloc_lock_lock(&_malloc_lock)
@@ -47,60 +80,32 @@
*/
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 malloc_zone_t *initial_default_zone = NULL;
unsigned malloc_debug_flags = 0;
-bool malloc_tracing_enabled = false;
-bool malloc_space_efficient_enabled = false;
-bool malloc_medium_space_efficient_enabled = false;
+boolean_t malloc_tracing_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 msl {
- void *dylib;
-
- void (*handle_memory_event) (unsigned long event);
- boolean_t (*stack_logging_locked) (void);
- void (*fork_prepare) (void);
- void (*fork_parent) (void);
- void (*fork_child) (void);
-
-
- // TODO delete these ones
- 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);
-} msl = {};
+static int malloc_debug_file = STDERR_FILENO;
+static os_once_t _malloc_initialize_pred;
+
+static const char Malloc_Facility[] = "com.apple.Libsystem.malloc";
+
+// Used by memory resource exceptions and enabling/disabling malloc stack logging via malloc_memory_event_handler
+static boolean_t warn_mode_entered = false;
+static boolean_t warn_mode_disable_retries = false;
+static stack_logging_mode_type msl_type_enabled_at_runtime = stack_logging_mode_none;
/*
* Counters that coordinate zone destruction (in malloc_zone_unregister) with
@@ -110,8 +115,6 @@
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
@@ -121,48 +124,13 @@
#define DEFAULT_MALLOC_ZONE_STRING "DefaultMallocZone"
#define DEFAULT_PUREGEABLE_ZONE_STRING "DefaultPurgeableMallocZone"
-#define MALLOC_HELPER_ZONE_STRING "MallocHelperZone"
-#define MALLOC_PGUARD_ZONE_STRING "ProbGuardMallocZone"
-
-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";
-#endif // CONFIG_MEDIUM_ALLOCATOR
+
+boolean_t malloc_engaged_nano(void);
/********* 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
-
void __malloc_init(const char *apple[]);
-static void _malloc_initialize(const char *apple[], const char *bootargs);
static int
__entropy_from_kernel(const char *str)
@@ -194,133 +162,15 @@
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 */
-
-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;
+/* TODO: Investigate adding _malloc_initialize() into this libSystem initializer */
+void
+__malloc_init(const char *apple[])
+{
+#if CONFIG_NANOZONE
+ // TODO: envp should be passed down from Libsystem
+ const char **envp = (const char **)*_NSGetEnviron();
+ nano_init(envp, apple);
#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);
- }
- }
-#endif // CONFIG_MEDIUM_ALLOCATOR
-}
-
-extern malloc_zone_t *force_asan_init_if_present(void)
- asm("_malloc_default_zone");
-
-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);
-#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;
for (p = apple; p && *p; p++) {
@@ -339,36 +189,10 @@
_malloc_entropy_initialized = true;
}
- __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.
-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;
-}
-
-MALLOC_NOEXPORT malloc_zone_t* lite_zone = NULL;
+}
+
+static malloc_zone_t* lite_zone = NULL;
MALLOC_ALWAYS_INLINE
static inline malloc_zone_t *
@@ -468,16 +292,8 @@
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
@@ -513,8 +329,8 @@
default_zone_print(malloc_zone_t *zone, boolean_t verbose)
{
zone = runtime_default_zone();
-
- return (void)zone->introspect->print(zone, verbose);
+
+ return (void)zone->introspect->check(zone);
}
static void
@@ -603,17 +419,15 @@
default_zone_batch_malloc,
default_zone_batch_free,
&default_zone_introspect,
- 10,
+ 9,
default_zone_memalign,
default_zone_free_definite_size,
- default_zone_pressure_relief,
- default_zone_malloc_claimed_address,
+ default_zone_pressure_relief
};
static malloc_zone_t *default_zone = &virtual_default_zone.malloc_zone;
-MALLOC_NOEXPORT
-/*static*/ boolean_t
+static boolean_t
has_default_zone0(void)
{
if (!malloc_zones) {
@@ -648,37 +462,32 @@
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 locking. 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;
- }
-
+
+ // 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;
+ }
+
+ // 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 (!has_default_zone0()) {
return zone;
+ } else {
+ return default_zone;
}
}
int32_t volatile *pFRZCounter = pFRZCounterLive; // Capture pointer to the counter of the moment
OSAtomicIncrement32Barrier(pFRZCounter); // Advance this counter -- our thread is in FRZ
+ unsigned index;
int32_t limit = *(int32_t volatile *)&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()).
@@ -695,8 +504,8 @@
// 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;
@@ -735,7 +544,7 @@
// 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;
}
@@ -761,7 +570,7 @@
static void set_flags_from_environment(void);
-MALLOC_NOEXPORT void
+static void
malloc_zone_register_while_locked(malloc_zone_t *zone)
{
size_t protect_size;
@@ -771,7 +580,7 @@
* so, print an error message and return. */
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;
}
}
@@ -785,7 +594,7 @@
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;
}
@@ -825,127 +634,243 @@
/* Finally, now that the zone is registered, disallow write access to the
* malloc_zones array */
mprotect(malloc_zones, protect_size, PROT_READ);
- //malloc_report(ASL_LEVEL_INFO, "Registered malloc_zone %p in malloc_zones %p [%u zones, %u bytes]\n", zone, malloc_zones,
+ //_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);
}
-// 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.
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);
+create_and_insert_lite_zone_while_locked()
+{
+ malloc_zone_t *zone0 = malloc_zones[0];
+
+ malloc_zone_t *stack_logging_lite_zone = create_stack_logging_lite_zone(0, zone0, malloc_debug_flags);
+ malloc_zone_register_while_locked(stack_logging_lite_zone);
+ malloc_set_zone_name(stack_logging_lite_zone, MALLOC_STOCK_LOGGING_LITE_ZONE_NAME);
+ lite_zone = stack_logging_lite_zone;
+}
+
+boolean_t
+turn_on_stack_logging(stack_logging_mode_type mode)
+{
+ boolean_t ret = false;
+
+ MALLOC_LOCK();
+
+ if (!stack_logging_enable_logging) {
+ if (__uniquing_table_memory_was_deleted()) {
+ // It would great to be able re-enable even if the uniquing table has been deleted
+ // <rdar://problem/25014005> malloc stack logging should be able to recreate the uniquing table if needed
+ } else {
+ switch (mode) {
+ case stack_logging_mode_all:
+ __prepare_to_log_stacks(false);
+ malloc_logger = __disk_stack_logging_log_stack;
+ __syscall_logger = __disk_stack_logging_log_stack;
+ stack_logging_mode = mode;
+ stack_logging_enable_logging = 1;
+ ret = true;
+
+ malloc_printf("recording malloc and VM allocation stacks to disk using standard recorder\n");
+ break;
+
+ case stack_logging_mode_malloc:
+ __prepare_to_log_stacks(false);
+ malloc_logger = __disk_stack_logging_log_stack;
+ stack_logging_mode = mode;
+ stack_logging_enable_logging = 1;
+ ret = true;
+
+ malloc_printf("recording malloc (but not VM allocation) stacks to disk using standard recorder\n");
+ break;
+
+ case stack_logging_mode_vm:
+ __prepare_to_log_stacks(false);
+ __syscall_logger = __disk_stack_logging_log_stack;
+ stack_logging_mode = mode;
+ stack_logging_enable_logging = 1;
+ ret = true;
+
+ malloc_printf("recording VM allocation (but not malloc) stacks to disk using standard recorder\n");
+ break;
+
+ case stack_logging_mode_lite:
+ if (!has_default_zone0()) {
+ malloc_printf("zone[0] is not the normal default zone so can't turn on lite mode.\n", mode);
+ ret = false;
+ } else {
+ malloc_printf("recording malloc (and VM allocation) stacks using lite mode\n");
+
+ if (lite_zone) {
+ enable_stack_logging_lite();
+ } else {
+ if (__prepare_to_log_stacks(true)) {
+ __syscall_logger = __disk_stack_logging_log_stack;
+ stack_logging_mode = stack_logging_mode_lite;
+ stack_logging_enable_logging = 1;
+ __prepare_to_log_stacks_stage2();
+ create_and_insert_lite_zone_while_locked();
+ enable_stack_logging_lite();
+ }
+ }
+ ret = true;
+ }
+ break;
+
+ default:
+ malloc_printf("invalid mode %d passed to turn_on_stack_logging\n", mode);
+ break;
+ }
+ }
} 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);
+ malloc_printf("malloc stack logging already enabled.\n");
+ }
+
+ MALLOC_UNLOCK();
+
+ return ret;
+}
+
+void
+turn_off_stack_logging()
+{
+ MALLOC_LOCK();
+
+ if (stack_logging_enable_logging) {
+ switch (stack_logging_mode) {
+ case stack_logging_mode_all:
+ malloc_logger = NULL;
+ __syscall_logger = NULL;
+ stack_logging_enable_logging = 0;
+ malloc_printf("turning off recording malloc and VM allocation stacks to disk using standard recorder\n");
+ break;
+
+ case stack_logging_mode_malloc:
+ malloc_logger = NULL;
+ stack_logging_enable_logging = 0;
+ malloc_printf("turnning off recording malloc (but not VM allocation) stacks to disk using standard recorder\n");
+ break;
+
+ case stack_logging_mode_vm:
+ __syscall_logger = NULL;
+ stack_logging_enable_logging = 0;
+ malloc_printf("turning off recording VM allocation (but not malloc) stacks to disk using standard recorder\n");
+ break;
+
+ case stack_logging_mode_lite:
+ malloc_printf("turning off recording malloc (but not VM allocation) stacks using lite mode\n");
+
+ disable_stack_logging_lite();
+ stack_logging_enable_logging = 0;
+ break;
+
+ default:
+ malloc_printf("invalid stack_logging_mode %d in turn_off_stack_logging\n", stack_logging_mode);
+ break;
+ }
} else {
- max_medium_magazines = max_magazines;
+ malloc_printf("malloc stack logging not enabled.\n");
+ }
+
+ MALLOC_UNLOCK();
+}
+
+// To be used in _malloc_initialize_once() only, call that function instead.
+static void
+_malloc_initialize(void *context __unused)
+{
+ MALLOC_LOCK();
+ unsigned n;
+ malloc_zone_t *zone;
+
+ if (!_malloc_entropy_initialized) {
+ // Lazy initialization may occur before __malloc_init (rdar://27075409)
+ // TODO: make this a fatal error
+ malloc_printf("*** malloc was initialized without entropy\n");
}
set_flags_from_environment(); // will only set flags up to two times
+ n = malloc_num_zones;
#if CONFIG_NANOZONE
- // TODO: envp should be passed down from Libsystem
- const char **envp = (const char **)*_NSGetEnviron();
- nano_common_init(envp, apple, bootargs);
+ 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
- const uint32_t k_max_zones = 2;
- malloc_zone_t *zone_stack[k_max_zones];
- const char *name_stack[k_max_zones];
- uint32_t num_zones = 0;
-
- initial_scalable_zone = create_scalable_zone(0, malloc_debug_flags);
- zone_stack[num_zones] = initial_scalable_zone;
- name_stack[num_zones] = DEFAULT_MALLOC_ZONE_STRING;
- num_zones++;
-
-#if CONFIG_NANOZONE
- nano_common_configure();
-
- malloc_zone_t *helper_zone = zone_stack[num_zones - 1];
- malloc_zone_t *nano_zone = NULL;
-
- if (_malloc_engaged_nano == NANO_V2) {
- nano_zone = nanov2_create_zone(helper_zone, malloc_debug_flags);
- } else if (_malloc_engaged_nano == NANO_V1) {
- nano_zone = nano_create_zone(helper_zone, malloc_debug_flags);
- }
-
- if (nano_zone) {
- initial_nano_zone = nano_zone;
- zone_stack[num_zones] = nano_zone;
- name_stack[num_zones] = DEFAULT_MALLOC_ZONE_STRING;
- name_stack[num_zones - 1] = MALLOC_HELPER_ZONE_STRING;
- num_zones++;
- }
-#endif
-
- MALLOC_ASSERT(num_zones <= k_max_zones);
- initial_default_zone = zone_stack[num_zones - 1];
-
- // 2 separate loops: malloc_set_zone_name already requires a working allocator.
- for (int i = num_zones - 1; i >= 0; i--) malloc_zone_register_while_locked(zone_stack[i]);
- for (int i = num_zones - 1; i >= 0; i--) malloc_set_zone_name(zone_stack[i], name_stack[i]);
-
- initial_num_zones = malloc_num_zones;
-
- // 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,
+ initial_default_zone = zone;
+
+ 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);
+ }
+
+ // Only setup stack logging hooks once lazy initialization is complete, the
+ // malloc_zone calls above would otherwise initialize malloc stack logging,
+ // which calls into malloc re-entrantly from Libc upcalls and so deadlocks
+ // in the lazy initialization os_once(). rdar://13046853
+ if (stack_logging_enable_logging) {
+ switch (stack_logging_mode) {
+ case stack_logging_mode_malloc:
+ malloc_logger = __disk_stack_logging_log_stack;
+ break;
+ case stack_logging_mode_vm:
+ __syscall_logger = __disk_stack_logging_log_stack;
+ break;
+ case stack_logging_mode_all:
+ malloc_logger = __disk_stack_logging_log_stack;
+ __syscall_logger = __disk_stack_logging_log_stack;
+ break;
+ case stack_logging_mode_lite:
+ __syscall_logger = __disk_stack_logging_log_stack;
+ create_and_insert_lite_zone_while_locked();
+ enable_stack_logging_lite();
+ break;
+ }
+ }
+
+ // _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);
-}
-
-static void make_last_zone_default_zone(void);
-static void
-register_pgm_zone(bool internal_diagnostics)
-{
- if (pguard_enabled(internal_diagnostics)) {
- malloc_zone_t *wrapped_zone = malloc_zones[0];
- malloc_zone_t *pgm_zone = pguard_create_zone(wrapped_zone);
- malloc_zone_register_while_locked(pgm_zone);
- make_last_zone_default_zone();
- initial_default_zone = pgm_zone;
- malloc_set_zone_name(pgm_zone, MALLOC_PGUARD_ZONE_STRING);
- }
+ MALLOC_UNLOCK();
+}
+
+MALLOC_ALWAYS_INLINE
+static inline void
+_malloc_initialize_once(void)
+{
+ os_once(&_malloc_initialize_pred, NULL, _malloc_initialize);
}
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);
+ _malloc_initialize_once();
+ // _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];
}
@@ -955,13 +880,46 @@
return 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;
+
+ _malloc_initialize_once();
+ // _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
+ 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
+ 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?
+}
+
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);
+ if (size > LARGE_THRESHOLD) { // Leopard and earlier returned a ZFOD range, so ...
+ return default_zone_calloc(zone, 1, size); // Clear to zero always, ham-handedly touching in each page
} else {
return default_zone_malloc(zone, size);
}
@@ -993,9 +951,9 @@
}
/*
- * 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
+boolean_t
malloc_engaged_nano(void)
{
#if CONFIG_NANOZONE
@@ -1015,7 +973,7 @@
// 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)) {
@@ -1029,10 +987,16 @@
set_flags_from_environment(void)
{
const char *flag;
- const char **env = (const char **)*_NSGetEnviron();
- const char **p;
- const char *c;
-
+ int fd;
+ char **env = *_NSGetEnviron();
+ char **p;
+ char *c;
+ bool restricted = 0;
+
+ 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
#else
@@ -1043,7 +1007,13 @@
malloc_debug_flags = 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().
@@ -1051,11 +1021,7 @@
* 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()) {
return;
}
@@ -1068,46 +1034,79 @@
* MallocLogFile & MallocCorruptionAbort
* as these provide the ability to turn *off* aborting in error cases.
*/
- bool restricted = dyld_process_is_restricted();
- malloc_print_configure(restricted);
+ restricted = dyld_process_is_restricted();
if (c == NULL) {
return;
}
-
- flag = getenv("MallocGuardEdges");
+ if (!restricted) {
+ 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 |= MALLOC_ADD_GUARD_PAGES;
+ _malloc_printf(ASL_LEVEL_INFO, "protecting edges\n");
+ if (getenv("MallocDoNotProtectPrelude")) {
+ malloc_debug_flags |= MALLOC_DONT_PROTECT_PRELUDE;
+ _malloc_printf(ASL_LEVEL_INFO, "... but not protecting prelude guard page\n");
+ }
+ if (getenv("MallocDoNotProtectPostlude")) {
+ malloc_debug_flags |= 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) {
- 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
+ // 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.
+ boolean_t lite_mode = strcmp(flag, "lite") == 0;
+
+ __prepare_to_log_stacks(lite_mode);
+
+ if (strcmp(flag, "lite") == 0) {
+ stack_logging_mode = stack_logging_mode_lite;
+ _malloc_printf(ASL_LEVEL_INFO, "recording malloc and VM allocation stacks using lite mode\n");
+ } else if (strcmp(flag,"malloc") == 0) {
+ stack_logging_mode = stack_logging_mode_malloc;
+ _malloc_printf(ASL_LEVEL_INFO, "recording malloc (but not VM allocation) stacks to disk using standard recorder\n");
+ } else if (strcmp(flag, "vm") == 0) {
+ stack_logging_mode = stack_logging_mode_vm;
+ _malloc_printf(ASL_LEVEL_INFO, "recording VM allocation (but not malloc) stacks to disk using standard recorder\n");
} 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");
+ stack_logging_mode = stack_logging_mode_all;
+ _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 (stack_logging_mode == stack_logging_mode_all || stack_logging_mode == stack_logging_mode_malloc) {
+ _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");
}
- 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_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");
+ _malloc_printf(ASL_LEVEL_INFO, "enabling abort() on bad malloc or free\n");
}
if (getenv("MallocTracing")) {
malloc_tracing_enabled = true;
@@ -1142,198 +1141,30 @@
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_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");
+ _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);
+ _malloc_printf(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);
+ _malloc_printf(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");
+ _malloc_printf(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 (getenv("MallocHelp")) {
- malloc_report(ASL_LEVEL_INFO,
+ _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"
@@ -1365,27 +1196,10 @@
if (start_size > MALLOC_ABSOLUTE_MAX_SIZE) {
return NULL;
}
-
+ _malloc_initialize_once();
zone = create_scalable_zone(start_size, flags | malloc_debug_flags);
malloc_zone_register(zone);
return zone;
-}
-
-static void
-make_last_zone_default_zone(void)
-{
- unsigned protect_size = malloc_num_zones_allocated * sizeof(malloc_zone_t *);
- mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
-
- malloc_zone_t *last_zone = malloc_zones[malloc_num_zones - 1];
-
- // assert(zone == malloc_zones[malloc_num_zones - 1];
- for (int i = malloc_num_zones - 1; i > 0; --i) {
- malloc_zones[i] = malloc_zones[i - 1];
- }
- malloc_zones[0] = last_zone;
-
- mprotect(malloc_zones, protect_size, PROT_READ);
}
/*
@@ -1396,7 +1210,9 @@
malloc_create_legacy_default_zone(void)
{
malloc_zone_t *zone;
-
+ int i;
+
+ _malloc_initialize_once();
zone = create_legacy_scalable_zone(0, malloc_debug_flags);
MALLOC_LOCK();
@@ -1411,7 +1227,16 @@
}
malloc_set_zone_name(zone, DEFAULT_MALLOC_ZONE_STRING);
- make_last_zone_default_zone();
+ 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();
}
@@ -1423,212 +1248,138 @@
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);
- } 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++]);
- }
- 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_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;
- } 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_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;
- }
+ 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, (unsigned)(vm_page_size / sizeof(vm_address_t) - 1), &num_frames);
+ } else {
+ _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 ", (void*)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");
+ }
+ }
+ 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) {
+ if (b) {
+ _os_set_crash_log_message_dynamic(_simple_string(b));
+ } else {
+ _os_set_crash_log_message("*** MallocCheckHeap: FAILED check");
+ }
+ abort();
+ } else if (b) {
+ _simple_sfree(b);
+ }
+ if (malloc_check_sleep > 0) {
+ _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_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;
+ }
}
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);
+ MALLOC_TRACE(TRACE_malloc | DBG_FUNC_START, (uintptr_t)zone, size, 0, 0);
void *ptr;
- if (malloc_check_start) {
+ 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 lite zone is passed in then we still call the lite methods
+
+
+ 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_malloc | DBG_FUNC_END, (uintptr_t)zone, size, (uintptr_t)ptr, 0);
+ return ptr;
+}
+
+void *
+malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size)
+{
+ void *ptr;
+ size_t alloc_size;
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ internal_check();
+ }
+ if (os_mul_overflow(num_items, size, &alloc_size) || alloc_size > MALLOC_ABSOLUTE_MAX_SIZE){
+ errno = ENOMEM;
+ return NULL;
+ }
ptr = zone->calloc(zone, num_items, size);
-
- if (os_unlikely(malloc_logger)) {
+
+ 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);
}
-
- 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 *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 *
@@ -1637,7 +1388,7 @@
MALLOC_TRACE(TRACE_realloc | DBG_FUNC_START, (uintptr_t)zone, (uintptr_t)ptr, size, 0);
void *new_ptr;
- if (malloc_check_start) {
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
@@ -1646,7 +1397,7 @@
new_ptr = zone->realloc(zone, ptr, size);
- if (os_unlikely(malloc_logger)) {
+ 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);
}
@@ -1657,12 +1408,12 @@
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_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, 0, 0);
+
+ 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();
}
@@ -1672,12 +1423,12 @@
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_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, size, 0);
+
+ 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();
}
@@ -1694,79 +1445,37 @@
}
}
-MALLOC_NOINLINE
-static void *
-_malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size,
- malloc_zone_options_t mzo)
+void *
+malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
{
MALLOC_TRACE(TRACE_memalign | DBG_FUNC_START, (uintptr_t)zone, alignment, size, 0);
- void *ptr = NULL;
- int err = ENOMEM;
+ void *ptr;
if (zone->version < 5) { // Version must be >= 5 to look at the new memalign field.
- goto out;
- }
- if (malloc_check_start) {
+ return NULL;
+ }
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
- goto out;
+ return NULL;
}
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;
+ return NULL;
}
if (!(zone->memalign)) {
- goto out;
+ 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 ************/
@@ -1807,12 +1516,8 @@
mprotect(malloc_zones, protect_size, PROT_READ);
- // MAX(num_zones, 1) enables 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 = MIN(MAX(malloc_num_zones, 1), initial_num_zones);
-
// 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;
pFRZCounterLive = pFRZCounterDrain;
@@ -1828,7 +1533,7 @@
return;
}
MALLOC_UNLOCK();
- malloc_report(ASL_LEVEL_ERR, "*** malloc_zone_unregister() failed for %p\n", z);
+ malloc_printf("*** malloc_zone_unregister() failed for %p\n", z);
}
void
@@ -1843,7 +1548,7 @@
}
if (name) {
size_t buflen = strlen(name) + 1;
- newName = _malloc_zone_malloc(z, buflen, MZ_NONE);
+ newName = malloc_zone_malloc(z, buflen);
if (newName) {
strlcpy(newName, name, buflen);
z->zone_name = (const char *)newName;
@@ -1860,26 +1565,76 @@
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)
+{
+ _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);
-}
-
-void *
-aligned_alloc(size_t alignment, size_t size)
-{
- return _malloc_zone_memalign(default_zone, alignment, size,
- MZ_POSIX | MZ_C11);
+ void *retval;
+ retval = malloc_zone_malloc(default_zone, size);
+ if (retval == NULL) {
+ errno = ENOMEM;
+ }
+ return retval;
}
void *
calloc(size_t num_items, size_t size)
{
- return _malloc_zone_calloc(default_zone, num_items, size, MZ_POSIX);
+ void *retval;
+ retval = malloc_zone_calloc(default_zone, num_items, size);
+ if (retval == NULL) {
+ errno = ENOMEM;
+ }
+ return retval;
}
void
@@ -1890,15 +1645,23 @@
if (!ptr) {
return;
}
-
zone = find_registered_zone(ptr, &size);
if (!zone) {
- int flags = MALLOC_REPORT_DEBUG | MALLOC_REPORT_NOLOG;
+ 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 & (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);
+ _SIMPLE_STRING b = _simple_salloc();
+ if (b) {
+ _simple_sprintf(b, "*** error for object %p: pointer being freed was not allocated\n", ptr);
+ _os_set_crash_log_message_dynamic(_simple_string(b));
+ } else {
+ _os_set_crash_log_message("*** 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 {
@@ -1927,18 +1690,27 @@
} 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 & (MALLOC_ABORT_ON_CORRUPTION | 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);
+ _os_set_crash_log_message_dynamic(_simple_string(b));
+ } else {
+ _os_set_crash_log_message("*** 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);
}
@@ -1948,7 +1720,13 @@
void *
valloc(size_t size)
{
- return _malloc_zone_valloc(default_zone, size, MZ_POSIX);
+ void *retval;
+ malloc_zone_t *zone = default_zone;
+ retval = malloc_zone_valloc(zone, size);
+ if (retval == NULL) {
+ errno = ENOMEM;
+ }
+ return retval;
}
extern void
@@ -2017,52 +1795,11 @@
}
}
-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);
+ errno = ENOMEM;
return NULL;
}
return realloc(in_ptr, alloc_size);
@@ -2072,7 +1809,7 @@
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);
+ errno = ENOMEM;
return NULL;
}
return reallocf(in_ptr, alloc_size);
@@ -2147,7 +1884,111 @@
// <rdar://problem/25063714>
}
-
+#if ENABLE_MEMORY_RESOURCE_EXCEPTION_HANDLING
+
+// Is the system elible to turn on/off MSL lite in response to memory resource exceptions
+//
+// Return true if
+// - The user has not explicitly opted out
+// and
+// - Either the user has explicitly opted in or this is an Apple Internal enabled build
+
+static boolean_t
+check_is_eligible_for_lite_mode_mre_handling(void)
+{
+ struct stat stat_buf;
+
+ // User opted out
+ if (stat("/var/db/disableLiteModeMemoryResourceExceptionHandling", &stat_buf) == 0) {
+ return false;
+ }
+
+ // User opted in
+ if (stat("/var/db/enableLiteModeMemoryResourceExceptionHandling", &stat_buf) == 0) {
+ return true;
+ }
+
+
+ // Not enabled for everything else
+ return false;
+}
+
+// Not thread-safe, but it's called from malloc_memory_event_handler which already assumes
+// single thread execution.
+static boolean_t
+is_eligible_for_lite_mode_mre_handling(void)
+{
+ static boolean_t is_eligible = false;
+ static boolean_t needs_check = true;
+
+ if (needs_check) {
+ is_eligible = check_is_eligible_for_lite_mode_mre_handling();
+ needs_check = false;
+ }
+
+ return is_eligible;
+}
+
+#endif
+
+static void
+handle_msl_memory_event(unsigned long event)
+{
+ // don't mix and match enabling mechanisms
+ if (warn_mode_entered) {
+ return;
+ }
+
+ event &= NOTE_MEMORYSTATUS_MSL_STATUS;
+
+ // sanity check
+ if (event == 0) {
+ return;
+ }
+
+ // first check if the disable bit is set
+ if (event & MEMORYSTATUS_DISABLE_MSL) {
+ turn_off_stack_logging();
+ return;
+ }
+
+ boolean_t msl_malloc = (event & MEMORYSTATUS_ENABLE_MSL_MALLOC);
+ boolean_t msl_vm = (event & MEMORYSTATUS_ENABLE_MSL_VM);
+ boolean_t msl_lite = (event & MEMORYSTATUS_ENABLE_MSL_LITE);
+
+ // The following always checks to make it's not possible to enable two different modes
+ // For instance this would not be allowed:
+ // Enable lite
+ // Disable
+ // Enable full
+
+ // Currently there is no separation of malloc/vm in lite mode
+ if (msl_lite) {
+ if (msl_type_enabled_at_runtime == stack_logging_mode_none || msl_type_enabled_at_runtime == stack_logging_mode_lite) {
+ msl_type_enabled_at_runtime = stack_logging_mode_lite;
+ turn_on_stack_logging(stack_logging_mode_lite);
+ }
+ return;
+ } else if (msl_malloc && msl_vm) {
+ if (msl_type_enabled_at_runtime == stack_logging_mode_none || msl_type_enabled_at_runtime == stack_logging_mode_all) {
+ msl_type_enabled_at_runtime = stack_logging_mode_all;
+ turn_on_stack_logging(stack_logging_mode_all);
+ }
+ return;
+ } else if (msl_malloc) {
+ if (msl_type_enabled_at_runtime == stack_logging_mode_none || msl_type_enabled_at_runtime == stack_logging_mode_malloc) {
+ msl_type_enabled_at_runtime = stack_logging_mode_malloc;
+ turn_on_stack_logging(stack_logging_mode_malloc);
+ }
+ return;
+ } else if (msl_vm) {
+ if (msl_type_enabled_at_runtime == stack_logging_mode_none || msl_type_enabled_at_runtime == stack_logging_mode_vm) {
+ msl_type_enabled_at_runtime = stack_logging_mode_vm;
+ turn_on_stack_logging(stack_logging_mode_vm);
+ }
+ return;
+ }
+}
// Note that malloc_memory_event_handler is not thread-safe, and we are relying on the callers of this for synchronization
void
@@ -2156,21 +1997,52 @@
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();
+
+ // First check for enable/disable MSL - only recognize if all other bits are 0
+ // Don't attempt this if we've either entered or exited MRE mode
+ if ((event & NOTE_MEMORYSTATUS_MSL_STATUS) != 0 && (event & ~NOTE_MEMORYSTATUS_MSL_STATUS) == 0 && !warn_mode_entered && !warn_mode_disable_retries) {
+ handle_msl_memory_event(event);
+ return;
}
#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);
- }
+ // If we have reached EXC_RESOURCE, we no longer need stack log data.
+ // If we are under system-wide memory pressure, we should jettison stack log data.
+ if ((event & (NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL | NOTE_MEMORYSTATUS_PRESSURE_CRITICAL)) &&
+ !warn_mode_disable_retries) {
+ // If we have crossed the EXC_RESOURCE limit once already, there is no point in
+ // collecting stack logs in the future, even if we missed a previous chance to
+ // collect data because nobody is going to ask us for it again.
+ warn_mode_disable_retries = true;
+
+ // Only try to clean up stack log data if it was enabled through a proc limit warning.
+ // User initiated stack logging should proceed unimpeded.
+ if (warn_mode_entered) {
+ malloc_printf("malloc_memory_event_handler: stopping stack-logging\n");
+ turn_off_stack_logging();
+ __malloc_lock_stack_logging();
+ __delete_uniquing_table_memory_while_locked();
+ __malloc_unlock_stack_logging();
+
+ warn_mode_entered = false;
+ }
+ }
+
+ // Enable stack logging if we are approaching the process limit, provided
+ // we aren't under system wide memory pressure and we're allowed to try again.
+ if ((event & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) &&
+ !(event & NOTE_MEMORYSTATUS_PRESSURE_CRITICAL) &&
+ !warn_mode_entered && !warn_mode_disable_retries &&
+ is_eligible_for_lite_mode_mre_handling()) {
+ malloc_printf("malloc_memory_event_handler: approaching memory limit. Starting stack-logging.\n");
+ if (turn_on_stack_logging(stack_logging_mode_lite)) {
+ warn_mode_entered = true;
+
+ // set the maximum allocation threshold
+ max_lite_mallocs = MAX_LITE_MALLOCS;
+ }
+ }
+#endif
}
size_t
@@ -2220,12 +2092,12 @@
if (!zone->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)) {
+ 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,
@@ -2239,10 +2111,10 @@
void
malloc_zone_batch_free(malloc_zone_t *zone, void **to_be_freed, unsigned num)
{
- if (malloc_check_start) {
+ if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
- if (os_unlikely(malloc_logger)) {
+ if (malloc_logger) {
unsigned index = 0;
while (index < num) {
malloc_logger(
@@ -2264,6 +2136,13 @@
}
/********* 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)
@@ -2284,14 +2163,14 @@
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;
@@ -2300,7 +2179,7 @@
// 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);
@@ -2392,29 +2271,20 @@
/********* 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)
{
#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));
+ malloc_printf("%s\n", _simple_string(b));
_os_set_crash_log_message_dynamic(_simple_string(b));
} else {
- malloc_report(MALLOC_REPORT_NOLOG, "*** error %d\n", x);
+ _malloc_printf(MALLOC_PRINTF_NOLOG, "*** error %d", x);
_os_set_crash_log_message("*** DefaultMallocError called");
}
abort();
@@ -2435,18 +2305,14 @@
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_lock(zone);
}
- if (callout) {
- callout();
- }
+ callout();
}
static 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);
@@ -2458,9 +2324,7 @@
_malloc_reinit_lock_all(void (*callout)(void))
{
unsigned index = 0;
- if (callout) {
- 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
@@ -2479,14 +2343,14 @@
void
_malloc_fork_prepare(void)
{
- return _malloc_lock_all(msl.fork_prepare);
+ 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);
+ return _malloc_unlock_all(&__stack_logging_fork_parent);
}
// Called in the child process after fork() to resume normal operation.
@@ -2494,15 +2358,11 @@
_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);
- } else if (_malloc_engaged_nano == NANO_V1) {
- nano_forked_zone((nanozone_t *)initial_nano_zone);
- }
+ if (_malloc_initialize_pred && _malloc_engaged_nano) {
+ nano_forked_zone((nanozone_t *)inline_malloc_default_zone());
}
#endif
- return _malloc_reinit_lock_all(msl.fork_child);
+ return _malloc_reinit_lock_all(&__stack_logging_fork_child);
}
/*
@@ -2608,7 +2468,7 @@
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;
}
@@ -2619,7 +2479,7 @@
{
static boolean_t warned = 0;
if (!warned) {
- malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: malloc_singlethreaded()\n");
+ malloc_printf("*** OBSOLETE: malloc_singlethreaded()\n");
warned = 1;
}
}
@@ -2627,342 +2487,8 @@
int
malloc_debug(int level)
{
- malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: malloc_debug()\n");
+ malloc_printf("*** OBSOLETE: malloc_debug()\n");
return 0;
}
-#pragma mark -
-#pragma mark Malloc Stack Logging
-
-
-/* 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
- const char **env = (const char**) *_NSGetEnviron();
- for (const char **e = env; *e; e++) {
- if (0==strncmp(*e, "MallocStackLogging", 18)) {
- malloc_register_stack_logger();
- void (*msl_set_flags_from_environment) (const char **env);
- msl_set_flags_from_environment = _dlsym(msl.dylib, "msl_set_flags_from_environment");
- if (msl_set_flags_from_environment) {
- msl_set_flags_from_environment(env);
- }
- break;
- }
- }
- if (msl.dylib) {
- void (*initialize) () = _dlsym(msl.dylib, "msl_initialize");
- if (initialize) {
- initialize();
- }
- }
-}
-
-
-static os_once_t _register_msl_dylib_pred;
-
-static void
-register_msl_dylib(void *dylib)
-{
- if (!dylib) {
- return;
- }
- msl.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");
-
- // TODO delete these ones
- msl.get_frames_for_address = _dlsym(dylib, "msl_get_frames_for_address");
- msl.stackid_for_vm_region = _dlsym(dylib, "msl_stackid_for_vm_region");
- msl.get_frames_for_stackid = _dlsym(dylib, "msl_get_frames_for_stackid");
- msl.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);
- }
-}
-
-MALLOC_EXPORT
-boolean_t
-malloc_register_stack_logger(void)
-{
- if (msl.dylib != NULL) {
- return true;
- }
- void *dylib = _dlopen("/System/Library/PrivateFrameworks/MallocStackLogging.framework/MallocStackLogging", RTLD_GLOBAL);
- if (dylib == NULL) {
- return false;
- }
- os_once(&_register_msl_dylib_pred, dylib, register_msl_dylib);
- if (!msl.dylib) {
- malloc_report(ASL_LEVEL_WARNING, "failed to load MallocStackLogging.framework\n");
- }
- return msl.dylib == dylib;
-}
-
-/* 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.dylib) {
- return false;
- }
- boolean_t (*msl_turn_on_stack_logging) (stack_logging_mode_type mode);
- msl_turn_on_stack_logging = _dlsym(msl.dylib, "msl_turn_on_stack_logging");
- 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.dylib) {
- return;
- }
- void (*msl_turn_off_stack_logging) ();
- msl_turn_off_stack_logging = _dlsym(msl.dylib, "msl_turn_off_stack_logging");
- if (msl_turn_off_stack_logging) {
- msl_turn_off_stack_logging();
- }
-}
-
-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 (!msl.dylib) {
- return KERN_FAILURE;
- }
- kern_return_t (*f) (task_t task, vm_address_t shared_memory_address, boolean_t *uses_lite_mode);
- f = _dlsym(msl.dylib, "msl_start_reading");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task, shared_memory_address, uses_lite_mode);
-}
-
-kern_return_t
-__mach_stack_logging_stop_reading(task_t task)
-{
- malloc_register_stack_logger();
- if (!msl.dylib) {
- return KERN_FAILURE;
- }
- kern_return_t (*f) (task_t task);
- f = _dlsym(msl.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 (!msl.get_frames_for_address) {
- return KERN_FAILURE;
- }
- return msl.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 (!msl.stackid_for_vm_region) {
- return -1ull;
- }
- return msl.stackid_for_vm_region(task, address);
-}
-
-
-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 (!msl.get_frames_for_stackid) {
- return KERN_FAILURE;
- }
- return msl.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, NULL);
-}
-
-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 (!msl.get_frames_for_stackid) {
- return KERN_FAILURE;
- }
- return msl.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, last_frame_is_threadid);
-}
-
-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 (!msl.uniquing_table_read_stack) {
- return KERN_FAILURE;
- }
- return msl.uniquing_table_read_stack(uniquing_table, stackid, out_frames_buffer, out_frames_count, max_frames);
-}
-
-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 (!msl.dylib) {
- return KERN_FAILURE;
- }
- f = _dlsym(msl.dylib, "msl_disk_stack_logs_enumerate_from_task");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task, address, enumerator, context);
-}
-
-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 (!msl.dylib) {
- return NULL;
- }
- f = _dlsym(msl.dylib, "msl_uniquing_table_copy_from_task");
- if (!f) {
- return NULL;
- }
- return f(task);
-}
-
-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 (!msl.dylib) {
- return NULL;
- }
- f = _dlsym(msl.dylib, "msl_uniquing_table_copy_from_serialized");
- if (!f) {
- return NULL;
- }
- return f(buffer, size);
-}
-
-void
-__mach_stack_logging_uniquing_table_release(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- if (!msl.dylib) {
- return;
- }
- void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msl.dylib, "msl_uniquing_table_release");
- if (f) {
- f(table);
- }
-}
-
-void
-__mach_stack_logging_uniquing_table_retain(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- if (!msl.dylib) {
- return;
- }
- void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msl.dylib, "msl_uniquing_table_retain");
- if (f) {
- f(table);
- }
-}
-
-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(msl.dylib, "msl_uniquing_table_retain");
- return f(table);
-}
-
-void *
-__mach_stack_logging_uniquing_table_serialize(struct backtrace_uniquing_table *table, mach_vm_size_t *size)
-{
- malloc_register_stack_logger();
- if (!msl.dylib) {
- return NULL;
- }
- void * (*f) (struct backtrace_uniquing_table *table, mach_vm_size_t *size);
- f = _dlsym(msl.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: */