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--- libmalloc/libmalloc-140.40.1/src/malloc.c
+++ libmalloc/libmalloc-283.60.1/src/malloc.c
@@ -23,47 +23,14 @@
#include "internal.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,
+#if TARGET_OS_IPHONE
+// malloc_report(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
-
-/*
- * 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))
+#endif // TARGET_OS_IPHONE
#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)
@@ -91,21 +58,45 @@
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 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;
+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 = {};
/*
* Counters that coordinate zone destruction (in malloc_zone_unregister) with
@@ -115,6 +106,8 @@
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
@@ -124,11 +117,43 @@
#define DEFAULT_MALLOC_ZONE_STRING "DefaultMallocZone"
#define DEFAULT_PUREGEABLE_ZONE_STRING "DefaultPurgeableMallocZone"
-
-boolean_t malloc_engaged_nano(void);
+#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";
+#endif // CONFIG_MEDIUM_ALLOCATOR
/********* 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[]);
@@ -162,14 +187,98 @@
return idx;
}
+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
+ 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");
+ }
+ }
+#endif // CONFIG_MEDIUM_ALLOCATOR
+}
+
/* 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' };
+ size_t len = sizeof(bootargs) - 1;
+ if (!sysctlbyname("kern.bootargs", bootargs, &len, NULL, 0) && len > 0) {
+ bootargs[len + 1] = '\0';
+ }
+
#if CONFIG_NANOZONE
// TODO: envp should be passed down from Libsystem
const char **envp = (const char **)*_NSGetEnviron();
- nano_init(envp, apple);
+ nano_common_init(envp, apple, bootargs);
#endif
const char **p;
@@ -189,10 +298,11 @@
_malloc_entropy_initialized = true;
}
+ __malloc_init_from_bootargs(bootargs);
mvm_aslr_init();
}
-static malloc_zone_t* lite_zone = NULL;
+MALLOC_NOEXPORT malloc_zone_t* lite_zone = NULL;
MALLOC_ALWAYS_INLINE
static inline malloc_zone_t *
@@ -292,8 +402,16 @@
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
@@ -329,8 +447,8 @@
default_zone_print(malloc_zone_t *zone, boolean_t verbose)
{
zone = runtime_default_zone();
-
- return (void)zone->introspect->check(zone);
+
+ return (void)zone->introspect->print(zone, verbose);
}
static void
@@ -419,15 +537,17 @@
default_zone_batch_malloc,
default_zone_batch_free,
&default_zone_introspect,
- 9,
+ 10,
default_zone_memalign,
default_zone_free_definite_size,
- default_zone_pressure_relief
+ default_zone_pressure_relief,
+ default_zone_malloc_claimed_address,
};
static malloc_zone_t *default_zone = &virtual_default_zone.malloc_zone;
-static boolean_t
+MALLOC_NOEXPORT
+/*static*/ boolean_t
has_default_zone0(void)
{
if (!malloc_zones) {
@@ -544,7 +664,7 @@
// lock. If trylock succeeds, unlock it, otherwise return "locked". Returns
// 0 == safe, 1 == locked/unsafe.
- if (__stack_logging_locked()) {
+ if (msl.stack_logging_locked && msl.stack_logging_locked()) {
return 1;
}
@@ -570,7 +690,7 @@
static void set_flags_from_environment(void);
-static void
+MALLOC_NOEXPORT void
malloc_zone_register_while_locked(malloc_zone_t *zone)
{
size_t protect_size;
@@ -580,7 +700,7 @@
* so, print an error message and return. */
for (i = 0; i != malloc_num_zones; ++i) {
if (zone == malloc_zones[i]) {
- _malloc_printf(ASL_LEVEL_ERR, "Attempted to register zone more than once: %p\n", zone);
+ malloc_report(ASL_LEVEL_ERR, "Attempted to register zone more than once: %p\n", zone);
return;
}
}
@@ -594,7 +714,7 @@
vm_addr = vm_page_size;
kern_return_t kr = mach_vm_allocate(mach_task_self(), &vm_addr, alloc_size, alloc_flags);
if (kr) {
- _malloc_printf(ASL_LEVEL_ERR, "malloc_zone_register allocation failed: %d\n", kr);
+ malloc_report(ASL_LEVEL_ERR, "malloc_zone_register allocation failed: %d\n", kr);
return;
}
@@ -634,144 +754,8 @@
/* Finally, now that the zone is registered, disallow write access to the
* malloc_zones array */
mprotect(malloc_zones, protect_size, PROT_READ);
- //_malloc_printf(ASL_LEVEL_INFO, "Registered malloc_zone %p in malloc_zones %p [%u zones, %u bytes]\n", zone, malloc_zones,
+ //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);
-}
-
-static void
-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 {
- 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 {
- malloc_printf("malloc stack logging not enabled.\n");
- }
-
- MALLOC_UNLOCK();
}
// To be used in _malloc_initialize_once() only, call that function instead.
@@ -780,20 +764,65 @@
{
MALLOC_LOCK();
unsigned n;
- malloc_zone_t *zone;
+ malloc_zone_t *zone = NULL;
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");
+ malloc_report(ASL_LEVEL_ERR, "*** malloc was initialized without entropy\n");
+ }
+
+ 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
n = malloc_num_zones;
#if CONFIG_NANOZONE
+ nano_common_configure();
+
malloc_zone_t *helper_zone = create_scalable_zone(0, malloc_debug_flags);
- zone = create_nano_zone(0, helper_zone, malloc_debug_flags);
+
+ if (_malloc_engaged_nano == NANO_V2) {
+ zone = nanov2_create_zone(helper_zone, malloc_debug_flags);
+ } else if (_malloc_engaged_nano == NANO_V1) {
+ zone = nano_create_zone(helper_zone, malloc_debug_flags);
+ }
if (zone) {
malloc_zone_register_while_locked(zone);
@@ -829,32 +858,8 @@
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,
+ // 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);
MALLOC_UNLOCK();
}
@@ -870,7 +875,7 @@
inline_malloc_default_zone(void)
{
_malloc_initialize_once();
- // _malloc_printf(ASL_LEVEL_INFO, "In inline_malloc_default_zone with %d %d\n", malloc_num_zones, malloc_has_debug_zone);
+ // 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];
}
@@ -887,7 +892,7 @@
unsigned index;
_malloc_initialize_once();
- // _malloc_printf(ASL_LEVEL_INFO, "In inline_malloc_default_scalable_zone with %d %d\n", malloc_num_zones,
+ // malloc_report(ASL_LEVEL_INFO, "In inline_malloc_default_scalable_zone with %d %d\n", malloc_num_zones,
// malloc_has_debug_zone);
MALLOC_LOCK();
@@ -911,15 +916,17 @@
}
MALLOC_UNLOCK();
- malloc_printf("*** malloc_default_scalable_zone() failed to find 'DefaultMallocZone'\n");
+ malloc_report(ASL_LEVEL_ERR, "*** 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 > 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
+ 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);
}
@@ -951,9 +958,9 @@
}
/*
- * malloc_engaged_nano() is for the benefit of libdispatch, which calls here just once.
+ * Returns the version of the Nano allocator that's in use, or 0 if not.
*/
-boolean_t
+int
malloc_engaged_nano(void)
{
#if CONFIG_NANOZONE
@@ -987,16 +994,10 @@
set_flags_from_environment(void)
{
const char *flag;
- 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;
- }
+ const char **env = (const char **)*_NSGetEnviron();
+ const char **p;
+ const char *c;
+
#if __LP64__
malloc_debug_flags = MALLOC_ABORT_ON_CORRUPTION; // Set always on 64-bit processes
#else
@@ -1007,13 +1008,6 @@
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().
@@ -1021,7 +1015,11 @@
* 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;
}
@@ -1034,79 +1032,33 @@
* MallocLogFile & MallocCorruptionAbort
* as these provide the ability to turn *off* aborting in error cases.
*/
- restricted = dyld_process_is_restricted();
+ bool restricted = dyld_process_is_restricted();
+ malloc_print_configure(restricted);
if (c == NULL) {
return;
}
- 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");
+ malloc_report(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");
+ malloc_report(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) {
- // 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 {
- 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");
- }
- }
- }
+ malloc_report(ASL_LEVEL_INFO, "... but not protecting postlude guard page\n");
+ }
+ }
+
if (getenv("MallocScribble")) {
malloc_debug_flags |= MALLOC_DO_SCRIBBLE;
- _malloc_printf(ASL_LEVEL_INFO, "enabling scribbling to detect mods to free blocks\n");
+ malloc_report(ASL_LEVEL_INFO, "enabling scribbling to detect mods to free blocks\n");
}
if (getenv("MallocErrorAbort")) {
malloc_debug_flags |= MALLOC_ABORT_ON_ERROR;
- _malloc_printf(ASL_LEVEL_INFO, "enabling abort() on bad malloc or free\n");
+ malloc_report(ASL_LEVEL_INFO, "enabling abort() on bad malloc or free\n");
}
if (getenv("MallocTracing")) {
malloc_tracing_enabled = true;
@@ -1141,30 +1093,121 @@
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);
+ malloc_report(ASL_LEVEL_INFO, "checks heap after operation #%d 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_printf(ASL_LEVEL_INFO, "will abort on heap corruption\n");
+ malloc_report(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_printf(ASL_LEVEL_INFO, "will sleep for %d seconds on heap corruption\n", malloc_check_sleep);
+ malloc_report(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);
+ malloc_report(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");
+ 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);
+ }
+ }
+
+#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("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_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_printf(ASL_LEVEL_INFO,
+ 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"
@@ -1248,71 +1291,87 @@
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 ************/
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, (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;
}
@@ -1344,14 +1403,11 @@
void *
malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size)
{
+ MALLOC_TRACE(TRACE_calloc | DBG_FUNC_START, (uintptr_t)zone, num_items, size, 0);
+
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);
@@ -1360,12 +1416,16 @@
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);
return ptr;
}
void *
malloc_zone_valloc(malloc_zone_t *zone, size_t size)
{
+ MALLOC_TRACE(TRACE_valloc | DBG_FUNC_START, (uintptr_t)zone, size, 0, 0);
+
void *ptr;
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
@@ -1379,6 +1439,8 @@
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_valloc | DBG_FUNC_END, (uintptr_t)zone, size, (uintptr_t)ptr, 0);
return ptr;
}
@@ -1408,7 +1470,7 @@
void
malloc_zone_free(malloc_zone_t *zone, void *ptr)
{
- MALLOC_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, 0, 0);
+ MALLOC_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, (ptr) ? *(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);
@@ -1423,7 +1485,7 @@
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, 0);
+ MALLOC_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, size, (ptr && size) ? *(uintptr_t*)ptr : 0);
if (malloc_logger) {
malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, 0, 0, 0);
@@ -1478,6 +1540,27 @@
return ptr;
}
+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 && (malloc_check_counter++ >= 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
@@ -1517,7 +1600,7 @@
mprotect(malloc_zones, protect_size, PROT_READ);
// Exchange the roles of the FRZ counters. The counter that has captured the number of threads presently
- // executing *inside* find_regiatered_zone is swapped with the counter drained to zero last time through.
+ // executing *inside* find_registered_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;
@@ -1533,7 +1616,7 @@
return;
}
MALLOC_UNLOCK();
- malloc_printf("*** malloc_zone_unregister() failed for %p\n", z);
+ malloc_report(ASL_LEVEL_ERR, "*** malloc_zone_unregister() failed for %p\n", z);
}
void
@@ -1565,53 +1648,6 @@
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 ************/
@@ -1627,6 +1663,22 @@
}
void *
+aligned_alloc(size_t alignment, size_t size)
+{
+ if (alignment < sizeof(void *) || !powerof2(alignment) || /* those are implementation requirements */
+ (size & (alignment - 1)) != 0) { /* C11 requires size to be a multiple of alignment */
+ errno = EINVAL;
+ return NULL;
+ }
+
+ void *retval = malloc_zone_memalign(default_zone, alignment, size);
+ if (retval == NULL) {
+ errno = ENOMEM;
+ }
+ return retval;
+}
+
+void *
calloc(size_t num_items, size_t size)
{
void *retval;
@@ -1645,23 +1697,15 @@
if (!ptr) {
return;
}
+
zone = find_registered_zone(ptr, &size);
if (!zone) {
- 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();
+ int flags = MALLOC_REPORT_DEBUG | MALLOC_REPORT_NOLOG;
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 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();
- }
+ 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_zone_free_definite_size(zone, ptr, size);
} else {
@@ -1690,25 +1734,16 @@
} else {
zone = find_registered_zone(old_ptr, NULL);
if (!zone) {
- 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();
+ 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 realloc'd was not allocated\n", in_ptr);
} else {
retval = malloc_zone_realloc(zone, old_ptr, new_size);
}
}
+
if (retval == NULL) {
errno = ENOMEM;
} else if (new_size == 0) {
@@ -1795,6 +1830,46 @@
}
}
+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 default zone, which is always present.
+ if (malloc_zone_claimed_address(malloc_zones[0], 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;
+ malloc_zone_t **zones = &malloc_zones[1];
+ boolean_t result = false;
+ for (unsigned index = 1; index < limit; ++index, ++zones) {
+ malloc_zone_t *zone = *zones;
+ 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;
@@ -1884,111 +1959,7 @@
// <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
@@ -1997,52 +1968,21 @@
if (event & NOTE_MEMORYSTATUS_PRESSURE_WARN) {
malloc_zone_pressure_relief(0, 0);
}
-
- // 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 ((event & NOTE_MEMORYSTATUS_MSL_STATUS) != 0 && (event & ~NOTE_MEMORYSTATUS_MSL_STATUS) == 0) {
+ malloc_register_stack_logger();
}
#if ENABLE_MEMORY_RESOURCE_EXCEPTION_HANDLING
- // 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
+ 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
@@ -2137,13 +2077,6 @@
/********* 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)
{
@@ -2163,14 +2096,14 @@
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_printf("*** malloc_get_all_zones: error reading zones_address at %p\n", (unsigned)remote_malloc_zones);
+ malloc_report(ASL_LEVEL_ERR, "*** malloc_get_all_zones: error reading zones_address at %p\n", (void *)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_printf("*** malloc_get_all_zones: error reading num_zones at %p\n", (unsigned)remote_malloc_num_zones);
+ malloc_report(ASL_LEVEL_ERR, "*** malloc_get_all_zones: error reading num_zones at %p\n", (void *)remote_malloc_num_zones);
return err;
}
num_zones = *num_zones_ref;
@@ -2179,7 +2112,7 @@
// 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_printf("*** malloc_get_all_zones: error reading zones at %p\n", &zones_address);
+ malloc_report(ASL_LEVEL_ERR, "*** 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);
@@ -2271,20 +2204,29 @@
/********* 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_printf("*** error %d\n", x);
+ malloc_report(ASL_LEVEL_ERR, "*** error %d\n", x);
sleep(3600);
#else
_SIMPLE_STRING b = _simple_salloc();
if (b) {
_simple_sprintf(b, "*** error %d", x);
- malloc_printf("%s\n", _simple_string(b));
+ malloc_report(MALLOC_REPORT_NOLOG, "%s\n", _simple_string(b));
_os_set_crash_log_message_dynamic(_simple_string(b));
} else {
- _malloc_printf(MALLOC_PRINTF_NOLOG, "*** error %d", x);
+ malloc_report(MALLOC_REPORT_NOLOG, "*** error %d\n", x);
_os_set_crash_log_message("*** DefaultMallocError called");
}
abort();
@@ -2305,14 +2247,18 @@
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_lock(zone);
}
- callout();
+ if (callout) {
+ callout();
+ }
}
static void
_malloc_unlock_all(void (*callout)(void))
{
unsigned index = 0;
- callout();
+ if (callout) {
+ callout();
+ }
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_unlock(zone);
@@ -2324,7 +2270,9 @@
_malloc_reinit_lock_all(void (*callout)(void))
{
unsigned index = 0;
- callout();
+ 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
@@ -2343,14 +2291,14 @@
void
_malloc_fork_prepare(void)
{
- return _malloc_lock_all(&__stack_logging_fork_prepare);
+ return _malloc_lock_all(msl.fork_prepare);
}
// Called in the parent process after fork() to resume normal operation.
void
_malloc_fork_parent(void)
{
- return _malloc_unlock_all(&__stack_logging_fork_parent);
+ return _malloc_unlock_all(msl.fork_parent);
}
// Called in the child process after fork() to resume normal operation.
@@ -2358,11 +2306,15 @@
_malloc_fork_child(void)
{
#if CONFIG_NANOZONE
- if (_malloc_initialize_pred && _malloc_engaged_nano) {
- nano_forked_zone((nanozone_t *)inline_malloc_default_zone());
+ if (_malloc_initialize_pred) {
+ if (_malloc_engaged_nano == NANO_V2) {
+ nanov2_forked_zone((nanozonev2_t *)inline_malloc_default_zone());
+ } else if (_malloc_engaged_nano == NANO_V1) {
+ nano_forked_zone((nanozone_t *)inline_malloc_default_zone());
+ }
}
#endif
- return _malloc_reinit_lock_all(&__stack_logging_fork_child);
+ return _malloc_reinit_lock_all(msl.fork_child);
}
/*
@@ -2468,7 +2420,7 @@
static boolean_t warned = 0;
if (!warned) {
#if PHASE_OUT_OLD_MALLOC
- malloc_printf("*** OBSOLETE: set_malloc_singlethreaded(%d)\n", single);
+ malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: set_malloc_singlethreaded(%d)\n", single);
#endif
warned = 1;
}
@@ -2479,7 +2431,7 @@
{
static boolean_t warned = 0;
if (!warned) {
- malloc_printf("*** OBSOLETE: malloc_singlethreaded()\n");
+ malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: malloc_singlethreaded()\n");
warned = 1;
}
}
@@ -2487,8 +2439,342 @@
int
malloc_debug(int level)
{
- malloc_printf("*** OBSOLETE: malloc_debug()\n");
+ malloc_report(ASL_LEVEL_ERR, "*** OBSOLETE: malloc_debug()\n");
return 0;
}
+#pragma mark -
+#pragma mark Malloc Stack Logging
+
+
+/* this is called from libsystem during initialization. */
+void
+__stack_logging_early_finished(const struct _malloc_functions *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/Alternate/MallocStackLogging.framework/MallocStackLogging", RTLD_GLOBAL);
+ if (dylib == NULL) {
+ dylib = _dlopen("/System/Library/PrivateFrameworks/MallocStackLogging.framework/MallocStackLogging", RTLD_GLOBAL);
+ }
+ 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: */