Loading...
--- libmalloc/libmalloc-283.100.5/src/malloc.c
+++ libmalloc/libmalloc-409.60.6/src/malloc.c
@@ -23,12 +23,12 @@
#include "internal.h"
-#if TARGET_OS_IPHONE
+#if MALLOC_TARGET_IOS
// 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 // TARGET_OS_IPHONE
+#endif // MALLOC_TARGET_IOS
#define USE_SLEEP_RATHER_THAN_ABORT 0
@@ -47,12 +47,20 @@
*/
int32_t malloc_num_zones = 0;
int32_t malloc_num_zones_allocated = 0;
-malloc_zone_t **malloc_zones = 0;
+malloc_zone_t **malloc_zones = (malloc_zone_t **)0xdeaddeaddeaddead;
malloc_logger_t *malloc_logger = NULL;
-static malloc_zone_t *initial_default_zone = NULL;
+
+static uint32_t initial_num_zones;
+static malloc_zone_t *initial_scalable_zone;
+static malloc_zone_t *initial_nano_zone;
+static bool has_injected_zone0;
unsigned malloc_debug_flags = 0;
-boolean_t malloc_tracing_enabled = false;
+bool malloc_tracing_enabled = false;
+bool malloc_space_efficient_enabled = false;
+bool malloc_medium_space_efficient_enabled = true;
+
+bool malloc_quarantine_enabled = false;
unsigned malloc_check_start = 0; // 0 means don't check
unsigned malloc_check_counter = 0;
@@ -60,21 +68,20 @@
static int malloc_check_sleep = 100; // default 100 second sleep
static int malloc_check_abort = 0; // default is to sleep, not abort
-
-static os_once_t _malloc_initialize_pred;
-
-static
-struct msl {
+static bool malloc_instrumented = false;
+static bool malloc_simple_stack_logging = false;
+#define MALLOC_SIMPLE_STACK_LOGGING_FLAGS \
+ (ASL_LEVEL_NOTICE | MALLOC_REPORT_NOPREFIX | MALLOC_REPORT_BACKTRACE | MALLOC_REPORT_NOWRITE)
+
+static struct _malloc_msl_symbols msl = {};
+
+// TODO delete this, its only used some deprecated functions like turn_on_stack_logging,
+// which have been replaced by functions in MallocStackLogging.framework
+// (like msl_turn_on_stack_logging)
+static struct msl_dylib {
+
void *dylib;
- 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,
@@ -96,7 +103,7 @@
mach_vm_address_t *out_frames_buffer,
uint32_t *out_frames_count,
uint32_t max_frames);
-} msl = {};
+} msld = {};
/*
* Counters that coordinate zone destruction (in malloc_zone_unregister) with
@@ -128,15 +135,31 @@
MALLOC_NOEXPORT
unsigned int hyper_shift;
+MALLOC_NOEXPORT
+size_t malloc_absolute_max_size;
+
// 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";
+
+
+MALLOC_NOEXPORT
+unsigned malloc_zero_on_free_sample_period = 0; // 0 means don't sample
+
+static const char zero_on_free_sample_period_boot_arg[] = "malloc_zero_on_free_sample_period";
+
+MALLOC_NOEXPORT
+malloc_zero_policy_t malloc_zero_policy = MALLOC_ZERO_POLICY_DEFAULT;
+
+static const char zero_on_free_enabled_boot_arg[] = "malloc_zero_on_free_enabled";
#if CONFIG_MEDIUM_ALLOCATOR
static const char medium_enabled_boot_arg[] = "malloc_medium_zone";
static const char max_medium_magazines_boot_arg[] = "malloc_max_medium_magazines";
static const char medium_activation_threshold_boot_arg[] = "malloc_medium_activation_threshold";
+static const char medium_space_efficient_boot_arg[] = "malloc_medium_space_efficient";
+static const char medium_madvise_dram_scale_divisor_boot_arg[] = "malloc_medium_madvise_dram_scale_divisor";
#endif // CONFIG_MEDIUM_ALLOCATOR
/********* Utilities ************/
@@ -156,6 +179,7 @@
#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)
@@ -185,6 +209,32 @@
}
}
return idx;
+}
+
+#if TARGET_OS_OSX && defined(__x86_64__)
+static uint64_t
+__is_translated(void)
+{
+ return (*(uint64_t*)_COMM_PAGE_CPU_CAPABILITIES64) & kIsTranslated;
+}
+#endif /* TARGET_OS_OSX */
+
+#define LIBMALLOC_EXPERIMENT_FACTORS_KEY "MallocExperiment="
+#define LIBMALLOC_EXPERIMENT_DISABLE_MEDIUM (1ULL)
+#define LIBMALLOC_DEFERRED_RECLAIM_ENABLE "MallocDeferredReclaim=1"
+static void
+__malloc_init_experiments(const char *str)
+{
+ uint64_t experiment_factors = 0;
+ str = strchr(str, '=');
+ if (str) {
+ experiment_factors = strtoull_l(str + 1, NULL, 16, NULL);
+ }
+ switch (experiment_factors) {
+ case LIBMALLOC_EXPERIMENT_DISABLE_MEDIUM:
+ magazine_medium_enabled = false;
+ break;
+ }
}
static void
@@ -222,7 +272,43 @@
}
}
+ flag = malloc_common_value_for_key_copy(bootargs,
+ zero_on_free_enabled_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 || value == 1)) {
+ malloc_zero_policy = value ? MALLOC_ZERO_ON_FREE : MALLOC_ZERO_NONE;
+ } else {
+ malloc_report(ASL_LEVEL_ERR,
+ "malloc_zero_on_free_enabled must be 0 or 1 - ignored.\n");
+ }
+ }
+
+ flag = malloc_common_value_for_key_copy(bootargs,
+ zero_on_free_sample_period_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) {
+ malloc_zero_on_free_sample_period = (unsigned int)value;
+ } else {
+ malloc_report(ASL_LEVEL_ERR,
+ "malloc_zero_on_free_sample_period must be positive - ignored.\n");
+ }
+ }
+
#if CONFIG_MEDIUM_ALLOCATOR
+#if TARGET_OS_OSX
+#if defined(__x86_64__)
+ if (__is_translated()) {
+ magazine_medium_active_threshold = 0;
+ }
+#elif defined(__arm64__)
+ magazine_medium_active_threshold = 0;
+#endif
+#endif /* TARGET_OS_OSX */
+
flag = malloc_common_value_for_key_copy(bootargs, medium_enabled_boot_arg,
value_buf, sizeof(value_buf));
if (flag) {
@@ -258,10 +344,34 @@
"malloc_max_medium_magazines must be positive - ignored.\n");
}
}
+
+ flag = malloc_common_value_for_key_copy(bootargs,
+ medium_space_efficient_boot_arg, value_buf, sizeof(value_buf));
+ if (flag) {
+ const char *endp;
+ long value = malloc_common_convert_to_long(flag, &endp);
+ if (!*endp) {
+ malloc_medium_space_efficient_enabled = (value != 0);
+ }
+ }
+
+ flag = malloc_common_value_for_key_copy(bootargs, medium_madvise_dram_scale_divisor_boot_arg, value_buf, sizeof(value_buf));
+ if (flag) {
+ const char *endp;
+ long value = malloc_common_convert_to_long(flag, &endp);
+ if (!*endp && value >= 0) {
+ magazine_medium_madvise_dram_scale_divisor = (uint64_t)value;
+ } else {
+ malloc_report(ASL_LEVEL_ERR,
+ "malloc_medium_madvise_dram_scale_divisor must be positive - ignored.\n");
+ }
+ }
#endif // CONFIG_MEDIUM_ALLOCATOR
}
-/* TODO: Investigate adding _malloc_initialize() into this libSystem initializer */
+extern malloc_zone_t *force_asan_init_if_present(void)
+ asm("_malloc_default_zone");
+
void
__malloc_init(const char *apple[])
{
@@ -270,18 +380,37 @@
// 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 (!sysctlbyname("kern.bootargs", bootargs, &len, NULL, 0) && len > 0) {
+ if (allow_bootargs &&
+ !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_common_init(envp, apple, bootargs);
+#if CONFIG_FEATUREFLAGS_SIMPLE
+ bool zero_on_free_feature_enabled = os_feature_enabled_simple(libmalloc,
+ ZeroOnFree, MALLOC_ZERO_POLICY_DEFAULT == MALLOC_ZERO_ON_FREE);
+ bool policy_is_zero_on_free = (malloc_zero_policy == MALLOC_ZERO_ON_FREE);
+ if (zero_on_free_feature_enabled != policy_is_zero_on_free) {
+ malloc_zero_policy = zero_on_free_feature_enabled ?
+ MALLOC_ZERO_ON_FREE : MALLOC_ZERO_NONE;
+ }
#endif
+ // Cache the calculation of this "constant", which unfortunately depends on
+ // runtime values of vm_kernel_page_size and vm_page_size
+ malloc_absolute_max_size = _MALLOC_ABSOLUTE_MAX_SIZE;
+
const char **p;
+ const char *malloc_experiments = NULL;
for (p = apple; p && *p; p++) {
if (strstr(*p, "malloc_entropy") == *p) {
int count = __entropy_from_kernel(*p);
@@ -290,16 +419,62 @@
if (sizeof(malloc_entropy) / sizeof(malloc_entropy[0]) == count) {
_malloc_entropy_initialized = true;
}
- break;
- }
+ }
+ if (strstr(*p, LIBMALLOC_EXPERIMENT_FACTORS_KEY) == *p) {
+ malloc_experiments = *p;
+ }
+#if CONFIG_DEFERRED_RECLAIM
+ if (strstr(*p, LIBMALLOC_DEFERRED_RECLAIM_ENABLE) == *p) {
+ // Turn on the large cache which will place
+ // its free entries in the deferred reclaim buffer
+ large_cache_enabled = 1;
+ }
+#endif /* CONFIG_DEFERRED_RECLAIM */
}
if (!_malloc_entropy_initialized) {
getentropy((void*)malloc_entropy, sizeof(malloc_entropy));
_malloc_entropy_initialized = true;
}
+ if (malloc_experiments) {
+ __malloc_init_experiments(malloc_experiments);
+ }
__malloc_init_from_bootargs(bootargs);
mvm_aslr_init();
+
+ /*
+ * This really is a renamed call to malloc_default_zone() which is
+ * interposable and interposed by asan, so that we trigger the lazy
+ * initialization of asan _BEFORE_ _malloc_initialize().
+ *
+ * If we do it after, then _malloc_initialize() then ASAN will replace
+ * the system allocator too late and bad things happen.
+ */
+ force_asan_init_if_present();
+
+ _malloc_initialize(apple, bootargs);
+}
+
+static void register_pgm_zone(bool internal_diagnostics);
+static void stack_logging_early_finished(const struct _malloc_late_init *funcs);
+
+// WARNING: The passed _malloc_late_init is a stack variable in
+// libSystem_initializer(). We must not hold on to it.
+//
+// WARNING 2: By the time this is called, malloc() is already used
+// a bunch of times (from libobjc, libxpc, ...).
+void
+__malloc_late_init(const struct _malloc_late_init *mli)
+{
+ register_pgm_zone(mli->internal_diagnostics);
+ stack_logging_early_finished(mli);
+ initial_num_zones = malloc_num_zones;
+
+#if CONFIG_QUARANTINE
+ if (malloc_quarantine_enabled) {
+ quarantine_reset_environment();
+ }
+#endif
}
MALLOC_NOEXPORT malloc_zone_t* lite_zone = NULL;
@@ -550,16 +725,12 @@
/*static*/ boolean_t
has_default_zone0(void)
{
- if (!malloc_zones) {
- return false;
- }
-
- return initial_default_zone == malloc_zones[0];
-}
-
-static inline malloc_zone_t *find_registered_zone(const void *, size_t *) __attribute__((always_inline));
+ return !has_injected_zone0;
+}
+
+static inline malloc_zone_t *find_registered_zone(const void *, size_t *, bool) __attribute__((always_inline));
static inline malloc_zone_t *
-find_registered_zone(const void *ptr, size_t *returned_size)
+find_registered_zone(const void *ptr, size_t *returned_size, bool known_non_default)
{
// Returns a zone which contains ptr, else NULL
@@ -582,32 +753,37 @@
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()) {
+
+ malloc_zone_t *zone;
+ size_t size;
+
+ // We assume that the initial zones will never be unregistered concurrently while this code is running so we can have
+ // a fast path without synchronization. Callers who really do unregister these (to install their own default zone) need
+ // to ensure they establish their zone setup during initialization and before entering a multi-threaded environment.
+ for (uint32_t i = known_non_default ? 1 : 0; i < initial_num_zones; i++) {
+ zone = malloc_zones[i];
+ size = zone->size(zone, ptr);
+
+ if (size) { // Claimed by this zone?
+ if (returned_size) {
+ *returned_size = size;
+ }
+
+ // Asan and others replace the zone at position 0 with their own zone.
+ // In that case just return that zone as they need this information.
+ // Otherwise return the virtual default zone, not the actual zone in position 0.
+ if (i == 0 && has_default_zone0()) {
+ return default_zone;
+ }
+
return zone;
- } 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()).
@@ -624,8 +800,8 @@
// 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 (index = 1; index < limit; ++index, ++zones) {
- zone = *zones;
+ for (uint32_t i = initial_num_zones; i < limit; i++) {
+ zone = malloc_zones[i];
size = zone->size(zone, ptr);
if (size) { // Claimed by this zone?
goto out;
@@ -691,7 +867,7 @@
static void set_flags_from_environment(void);
MALLOC_NOEXPORT void
-malloc_zone_register_while_locked(malloc_zone_t *zone)
+malloc_zone_register_while_locked(malloc_zone_t *zone, bool make_default)
{
size_t protect_size;
unsigned i;
@@ -740,6 +916,13 @@
mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
}
+ if (make_default) {
+ memmove(&malloc_zones[1], &malloc_zones[0], malloc_num_zones * sizeof(malloc_zone_t *));
+ malloc_zones[0] = zone;
+ } else {
+ malloc_zones[malloc_num_zones] = zone;
+ }
+
/* <rdar://problem/12871662> This store-increment needs to be visible in the correct
* order to any threads in find_registered_zone, such that if the incremented value
* in malloc_num_zones is visible then the pointer write before it must also be visible.
@@ -748,30 +931,29 @@
* ensure the proper store-release operation is performed is to use OSAtomic*Barrier
* to update malloc_num_zones.
*/
- malloc_zones[malloc_num_zones] = zone;
OSAtomicIncrement32Barrier(&malloc_num_zones);
/* Finally, now that the zone is registered, disallow write access to the
* malloc_zones array */
mprotect(malloc_zones, protect_size, PROT_READ);
+
+ // ASan and others interpose on mprotect() to ensure their zone is always at position 0.
+ if (make_default && malloc_zones[0] != zone) {
+ has_injected_zone0 = true;
+ }
+
//malloc_report(ASL_LEVEL_INFO, "Registered malloc_zone %p in malloc_zones %p [%u zones, %u bytes]\n", zone, malloc_zones,
// malloc_num_zones, protect_size);
}
-// To be used in _malloc_initialize_once() only, call that function instead.
+// 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(void *context __unused)
-{
- MALLOC_LOCK();
- unsigned n;
- 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_report(ASL_LEVEL_ERR, "*** malloc was initialized without entropy\n");
- }
-
+_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;
@@ -811,70 +993,120 @@
}
set_flags_from_environment(); // will only set flags up to two times
- n = malloc_num_zones;
+
+ if (malloc_tracing_enabled || malloc_simple_stack_logging) {
+ // Note: although malloc_tracing_enabled is exported "for performance
+ // tools", it does not appear in any API or SPI headers and is not
+ // referenced by any indexed performance tools, so we're going to go
+ // ahead and stop respecting dynamic programmatic enablement via direct
+ // setting of the global by other code
+ //
+ // TODO: it may be possible to fold malloc_check_start into this as well
+ malloc_instrumented = true;
+ }
+
+#if CONFIG_QUARANTINE
+ malloc_quarantine_enabled = quarantine_should_enable();
+#endif
+
+#if CONFIG_NANOZONE
+ // TODO: envp should be passed down from Libsystem
+ const char **envp = (const char **)*_NSGetEnviron();
+
+ // Force magazine_malloc when:
+ // - quarantine is enabled, to avoid speculative out-of-bounds
+ // use-after-free reads that nano/nanov2 performs, OR
+ // - MallocScribble is enabled, which nanov2 does not implement
+ // - MallocCheckZeroOnFreeCorruption sampling is enabled, which nanov2 does
+ // not implement
+ if (!malloc_quarantine_enabled &&
+ !(malloc_debug_flags & MALLOC_DO_SCRIBBLE) &&
+ !malloc_zero_on_free_sample_period) {
+ nano_common_init(envp, apple, bootargs);
+ }
+#endif // CONFIG_NANOZONE
+
+ initial_scalable_zone = create_scalable_zone(0, malloc_debug_flags);
+ malloc_set_zone_name(initial_scalable_zone, DEFAULT_MALLOC_ZONE_STRING);
+ malloc_zone_register_while_locked(initial_scalable_zone, /*make_default=*/true);
#if CONFIG_NANOZONE
nano_common_configure();
-
- malloc_zone_t *helper_zone = create_scalable_zone(0, malloc_debug_flags);
+
+ malloc_zone_t *helper_zone = initial_scalable_zone;
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);
- 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);
+ initial_nano_zone = nanov2_create_zone(helper_zone, malloc_debug_flags);
+ }
+
+ if (initial_nano_zone) {
+ malloc_set_zone_name(initial_nano_zone, DEFAULT_MALLOC_ZONE_STRING);
malloc_set_zone_name(helper_zone, MALLOC_HELPER_ZONE_STRING);
+ malloc_zone_register_while_locked(initial_nano_zone, /*make_default=*/true);
+ }
+#endif
+
+#if CONFIG_QUARANTINE
+ if (malloc_quarantine_enabled) {
+ malloc_zone_t *wrapped_zone = malloc_zones[0];
+ malloc_zone_t *quarantine_zone = quarantine_create_zone(wrapped_zone);
+ malloc_zone_register_while_locked(quarantine_zone, /*make_default=*/true);
+ }
+#endif
+
+ initial_num_zones = malloc_num_zones;
+
+#if CONFIG_DEFERRED_RECLAIM
+ if (large_cache_enabled) {
+ kern_return_t kr = mvm_deferred_reclaim_init();
+ if (kr != KERN_SUCCESS) {
+ MALLOC_REPORT_FATAL_ERROR(kr, "Unable to set up reclaim buffer.\n");
+ }
+ }
+#endif /* CONFIG_DEFERRED_RECLAIM */
+
+#if CONFIG_MEDIUM_ALLOCATOR
+ uint64_t memsize = platform_hw_memsize();
+ if (memsize >= 8 * magazine_medium_madvise_dram_scale_divisor) {
+ magazine_medium_madvise_window_scale_factor = 8;
+ } else if (memsize >= 4 * magazine_medium_madvise_dram_scale_divisor) {
+ magazine_medium_madvise_window_scale_factor = 4;
+ } else if (memsize >= 2 * magazine_medium_madvise_dram_scale_divisor) {
+ magazine_medium_madvise_window_scale_factor = 2;
} else {
- 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
-
- 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);
- }
+ magazine_medium_madvise_window_scale_factor = 1;
+ }
+#endif /* CONFIG_MEDIUM_ALLOCATOR */
// malloc_report(ASL_LEVEL_INFO, "%d registered zones\n", malloc_num_zones);
// malloc_report(ASL_LEVEL_INFO, "malloc_zones is at %p; malloc_num_zones is at %p\n", (unsigned)&malloc_zones,
// (unsigned)&malloc_num_zones);
- MALLOC_UNLOCK();
-}
-
-MALLOC_ALWAYS_INLINE
-static inline void
-_malloc_initialize_once(void)
-{
- os_once(&_malloc_initialize_pred, NULL, _malloc_initialize);
+}
+
+static bool internal_build;
+static bool
+enable_pgm(void)
+{
+ bool other_debug_tool = has_injected_zone0 || malloc_quarantine_enabled;
+ return !other_debug_tool && pgm_should_enable(internal_build);
+}
+
+static void
+register_pgm_zone(bool internal_diagnostics)
+{
+ if (internal_diagnostics) {
+ internal_build = true;
+ }
+ if (enable_pgm()) {
+ malloc_zone_t *wrapped_zone = malloc_zones[0];
+ malloc_zone_t *pgm_zone = pgm_create_zone(wrapped_zone);
+ malloc_zone_register_while_locked(pgm_zone, /*make_default=*/true);
+ }
}
static inline malloc_zone_t *
inline_malloc_default_zone(void)
{
- _malloc_initialize_once();
// 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];
}
@@ -883,41 +1115,6 @@
malloc_default_zone(void)
{
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_report(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_report(ASL_LEVEL_ERR, "*** malloc_default_scalable_zone() failed to find 'DefaultMallocZone'\n");
- return NULL; // FIXME: abort() instead?
}
static void *
@@ -980,7 +1177,7 @@
// 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, inline_malloc_default_scalable_zone(), malloc_debug_flags);
+ malloc_zone_t *tmp = create_purgeable_zone(0, initial_scalable_zone, malloc_debug_flags);
malloc_zone_register(tmp);
malloc_set_zone_name(tmp, DEFAULT_PUREGEABLE_ZONE_STRING);
if (!OSAtomicCompareAndSwapPtrBarrier(NULL, tmp, (void**)&dpz)) {
@@ -1009,8 +1206,15 @@
}
#endif
- // Disable large ASLR sliding until 59078838 introduces the checkfix to fix bincompat issues
- malloc_debug_flags |= DISABLE_LARGE_ASLR;
+#if TARGET_OS_OSX
+ // rdar://99288027
+ if (!dyld_program_sdk_at_least(dyld_platform_version_macOS_13_0)) {
+ if (malloc_zero_policy == MALLOC_ZERO_ON_FREE) {
+ malloc_zero_policy = MALLOC_ZERO_ON_ALLOC;
+ }
+ }
+#else // TARGET_OS_OSX
+#endif // TARGET_OS_OSX
/*
* Given that all environment variables start with "Malloc" we optimize by scanning quickly
@@ -1080,6 +1284,9 @@
if (getenv("MallocTracing")) {
malloc_tracing_enabled = true;
}
+ if (getenv("MallocSimpleStackLogging")) {
+ malloc_simple_stack_logging = true;
+ }
#if __LP64__
/* initialization above forces MALLOC_ABORT_ON_CORRUPTION of 64-bit processes */
@@ -1178,6 +1385,31 @@
}
}
+#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
+ // Disable the large cache in space efficient mode
+ if (value != 0){
+ large_cache_enabled = 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) {
@@ -1200,6 +1432,23 @@
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");
@@ -1224,6 +1473,32 @@
}
#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) {
@@ -1235,6 +1510,40 @@
}
}
#endif // CONFIG_RECIRC_DEPOT
+
+ flag = getenv("MallocZeroOnFree");
+ if (flag) {
+ const char *endp;
+ long value = malloc_common_convert_to_long(flag, &endp);
+ if (!*endp && endp != flag && (value == 0 || value == 1)) {
+ malloc_zero_policy = value ? MALLOC_ZERO_ON_FREE : MALLOC_ZERO_NONE;
+ } else {
+ malloc_report(ASL_LEVEL_ERR, "MallocZeroOnFree must be 0 or 1.\n");
+ }
+ }
+
+ flag = getenv("MallocZeroOnAlloc");
+ if (flag) {
+ const char *endp;
+ long value = malloc_common_convert_to_long(flag, &endp);
+ if (!*endp && endp != flag && (value == 0 || value == 1)) {
+ malloc_zero_policy = value ? MALLOC_ZERO_ON_ALLOC : MALLOC_ZERO_NONE;
+ } else {
+ malloc_report(ASL_LEVEL_ERR, "MallocZeroOnAlloc must be 0 or 1.\n");
+ }
+ }
+
+ flag = getenv("MallocCheckZeroOnFreeCorruption");
+ if (flag) {
+ int value = (int)strtol(flag, NULL, 0);
+ if (value > 0) {
+ malloc_zero_on_free_sample_period = value;
+ } else {
+ malloc_report(ASL_LEVEL_ERR,
+ "malloc_zero_on_free_sample_period must be positive - ignored.\n");
+ }
+ }
+
if (getenv("MallocHelp")) {
malloc_report(ASL_LEVEL_INFO,
"environment variables that can be set for debug:\n"
@@ -1255,6 +1564,8 @@
" MallocCorruptionAbort is always set on 64-bit processes\n"
"- MallocErrorAbort to abort on any malloc error, including out of memory\n"\
"- MallocTracing to emit kdebug trace points on malloc entry points\n"\
+ "- MallocZeroOnFree to enable or disable zero-on-free behavior (for debugging only)\n"\
+ "- MallocCheckZeroOnFreeCorruption to enable zero-on-free corruption detection\n"\
"- MallocHelp - this help!\n");
}
}
@@ -1265,12 +1576,19 @@
malloc_zone_t *zone;
/* start_size doesn't actually appear to be used, but we test anyway. */
- if (start_size > MALLOC_ABSOLUTE_MAX_SIZE) {
+ 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);
+
+#if CONFIG_PGM_WRAP_CUSTOM_ZONES
+ if (enable_pgm()) {
+ zone = pgm_create_zone(zone);
+ malloc_zone_register(zone);
+ }
+#endif
return zone;
}
@@ -1282,13 +1600,10 @@
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();
- malloc_zone_register_while_locked(zone);
//
// Establish the legacy scalable zone just created as the default zone.
@@ -1299,16 +1614,7 @@
}
malloc_set_zone_name(zone, DEFAULT_MALLOC_ZONE_STRING);
- 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_zone_register_while_locked(zone, /*make_default=*/true);
MALLOC_UNLOCK();
}
@@ -1393,9 +1699,13 @@
/********* Block creation and manipulation ************/
+__attribute__((cold, noinline))
static void
internal_check(void)
{
+ if (malloc_check_counter++ < malloc_check_start) {
+ return;
+ }
if (malloc_zone_check(NULL)) {
if (!frames) {
vm_allocate(mach_task_self(), (void *)&frames, vm_page_size, 1);
@@ -1405,72 +1715,164 @@
malloc_check_start += malloc_check_each;
}
+MALLOC_NOINLINE
+static void *
+_malloc_zone_malloc_instrumented_or_legacy(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 (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);
+ }
+
+ if (os_unlikely(malloc_simple_stack_logging)) {
+ malloc_report(MALLOC_SIMPLE_STACK_LOGGING_FLAGS, "malloc (%p/%llu): ",
+ ptr, (unsigned long long)size);
+ }
+
+ 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;
+}
+
+static void *
+_malloc_zone_malloc(malloc_zone_t *zone, size_t size, malloc_zone_options_t mzo)
+{
+ if (zone == default_zone && !lite_zone) {
+ // Eagerly resolve the virtual default zone to make the zone version
+ // check accurate
+ zone = malloc_zones[0];
+ }
+
+ if (os_unlikely(malloc_instrumented || malloc_check_start ||
+ malloc_logger || zone->version < 13)) {
+ return _malloc_zone_malloc_instrumented_or_legacy(zone, size, mzo);
+ }
+
+ if (os_unlikely(size > malloc_absolute_max_size)) {
+ malloc_set_errno_fast(mzo, ENOMEM);
+ return NULL;
+ }
+
+ // zone versions >= 13 set errno on failure so we can tail-call
+ return zone->malloc(zone, size);
+}
+
void *
malloc_zone_malloc(malloc_zone_t *zone, size_t size)
{
- MALLOC_TRACE(TRACE_malloc | DBG_FUNC_START, (uintptr_t)zone, size, 0, 0);
+ return _malloc_zone_malloc(zone, size, MZ_NONE);
+}
+
+MALLOC_NOINLINE
+static void *
+_malloc_zone_calloc_instrumented_or_legacy(malloc_zone_t *zone,
+ size_t num_items, size_t size, malloc_zone_options_t mzo)
+{
+ MALLOC_TRACE(TRACE_calloc | DBG_FUNC_START, (uintptr_t)zone, num_items, size, 0);
void *ptr;
- if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ if (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);
+
+ ptr = zone->calloc(zone, num_items, size);
+
+ if (os_unlikely(malloc_logger)) {
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE | MALLOC_LOG_TYPE_CLEARED, (uintptr_t)zone,
+ (uintptr_t)(num_items * size), 0, (uintptr_t)ptr, 0);
+ }
+
+ if (os_unlikely(malloc_simple_stack_logging)) {
+ malloc_report(MALLOC_SIMPLE_STACK_LOGGING_FLAGS, "calloc (%p/%llu*%llu): ",
+ ptr, (unsigned long long)num_items, (unsigned long long)size);
+ }
+
+ 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;
+}
+
+MALLOC_NOINLINE
+static void *
+_malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size,
+ malloc_zone_options_t mzo)
+{
+ if (zone == default_zone && !lite_zone) {
+ // Eagerly resolve the virtual default zone to make the zone version
+ // check accurate
+ zone = malloc_zones[0];
+ }
+
+ if (os_unlikely(malloc_instrumented || malloc_check_start ||
+ malloc_logger || zone->version < 13)) {
+ return _malloc_zone_calloc_instrumented_or_legacy(zone, num_items, size, mzo);
+ }
+
+ // zone versions >= 13 set errno on failure so we can tail-call
+ return zone->calloc(zone, num_items, size);
}
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;
- if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ 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();
}
-
- ptr = zone->calloc(zone, num_items, size);
-
- if (malloc_logger) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE | MALLOC_LOG_TYPE_CLEARED, (uintptr_t)zone,
- (uintptr_t)(num_items * size), 0, (uintptr_t)ptr, 0);
- }
-
- MALLOC_TRACE(TRACE_calloc | DBG_FUNC_END, (uintptr_t)zone, num_items, size, (uintptr_t)ptr);
+ 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);
+ }
+
+ if (os_unlikely(malloc_simple_stack_logging)) {
+ malloc_report(MALLOC_SIMPLE_STACK_LOGGING_FLAGS, "valloc (%p/%llu): ",
+ ptr, (unsigned long long)size);
+ }
+
+ 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)
{
- 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();
- }
- 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);
- }
-
- MALLOC_TRACE(TRACE_valloc | DBG_FUNC_END, (uintptr_t)zone, size, (uintptr_t)ptr, 0);
- return ptr;
+ return _malloc_zone_valloc(zone, size, MZ_NONE);
}
void *
@@ -1479,19 +1881,25 @@
MALLOC_TRACE(TRACE_realloc | DBG_FUNC_START, (uintptr_t)zone, (uintptr_t)ptr, size, 0);
void *new_ptr;
- if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ if (malloc_check_start) {
internal_check();
}
- if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
+ if (size > malloc_absolute_max_size) {
return NULL;
}
new_ptr = zone->realloc(zone, ptr, size);
- if (malloc_logger) {
+ if (os_unlikely(malloc_logger)) {
malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone,
(uintptr_t)ptr, (uintptr_t)size, (uintptr_t)new_ptr, 0);
}
+
+ if (os_unlikely(malloc_simple_stack_logging)) {
+ malloc_report(MALLOC_SIMPLE_STACK_LOGGING_FLAGS, "realloc (%p->%p/%llu): ",
+ ptr, new_ptr, (unsigned long long)size);
+ }
+
MALLOC_TRACE(TRACE_realloc | DBG_FUNC_END, (uintptr_t)zone, (uintptr_t)ptr, size, (uintptr_t)new_ptr);
return new_ptr;
}
@@ -1501,10 +1909,13 @@
{
MALLOC_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, (ptr) ? *(uintptr_t*)ptr : 0, 0);
- if (malloc_logger) {
+ if (os_unlikely(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 && (malloc_check_counter++ >= malloc_check_start)) {
+ if (os_unlikely(malloc_simple_stack_logging)) {
+ malloc_report(MALLOC_SIMPLE_STACK_LOGGING_FLAGS, "malloc_zone_free (%p): ", ptr);
+ }
+ if (malloc_check_start) {
internal_check();
}
@@ -1516,10 +1927,14 @@
{
MALLOC_TRACE(TRACE_free, (uintptr_t)zone, (uintptr_t)ptr, size, (ptr && size) ? *(uintptr_t*)ptr : 0);
- if (malloc_logger) {
+ if (os_unlikely(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 && (malloc_check_counter++ >= malloc_check_start)) {
+ if (os_unlikely(malloc_simple_stack_logging)) {
+ malloc_report(MALLOC_SIMPLE_STACK_LOGGING_FLAGS, "free (%p/%llu): ",
+ ptr, (unsigned long long)size);
+ }
+ if (malloc_check_start) {
internal_check();
}
@@ -1532,41 +1947,66 @@
if (!ptr) {
return NULL;
} else {
- return find_registered_zone(ptr, NULL);
- }
+ return find_registered_zone(ptr, NULL, false);
+ }
+}
+
+MALLOC_NOINLINE
+static void *
+_malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size,
+ malloc_zone_options_t mzo)
+{
+ MALLOC_TRACE(TRACE_memalign | DBG_FUNC_START, (uintptr_t)zone, alignment, size, 0);
+
+ void *ptr = NULL;
+ int err = ENOMEM;
+ if (zone->version < 5) { // Version must be >= 5 to look at the new memalign field.
+ goto out;
+ }
+ if (malloc_check_start) {
+ internal_check();
+ }
+ if (size > malloc_absolute_max_size) {
+ goto out;
+ }
+ if (alignment < sizeof(void *) || // excludes 0 == alignment
+ 0 != (alignment & (alignment - 1))) { // relies on sizeof(void *) being a power of two.
+ err = EINVAL;
+ goto out;
+ }
+ if ((mzo & MZ_C11) && (size & (alignment - 1)) != 0) { /* C11 requires size to be a multiple of alignment */
+ err = EINVAL;
+ goto out;
+ }
+
+ if (!(zone->memalign)) {
+ goto out;
+ }
+ ptr = zone->memalign(zone, alignment, 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);
+ }
+ if (os_unlikely(malloc_simple_stack_logging)) {
+ malloc_report(MALLOC_SIMPLE_STACK_LOGGING_FLAGS, "memalign (%p/%llu,%llu): ",
+ ptr, (unsigned long long)alignment, (unsigned long long)size);
+ }
+
+ 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)
{
- MALLOC_TRACE(TRACE_memalign | DBG_FUNC_START, (uintptr_t)zone, alignment, size, 0);
-
- void *ptr;
- if (zone->version < 5) { // Version must be >= 5 to look at the new memalign field.
- return NULL;
- }
- if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
- internal_check();
- }
- if (size > MALLOC_ABSOLUTE_MAX_SIZE) {
- return NULL;
- }
- if (alignment < sizeof(void *) || // excludes 0 == alignment
- 0 != (alignment & (alignment - 1))) { // relies on sizeof(void *) being a power of two.
- return NULL;
- }
-
- if (!(zone->memalign)) {
- return NULL;
- }
- ptr = zone->memalign(zone, alignment, 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);
- }
-
- MALLOC_TRACE(TRACE_memalign | DBG_FUNC_END, (uintptr_t)zone, alignment, size, (uintptr_t)ptr);
- return ptr;
+ return _malloc_zone_memalign(zone, alignment, size, MZ_NONE);
}
boolean_t
@@ -1577,7 +2017,7 @@
return false;
}
- if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ if (malloc_check_start) {
internal_check();
}
@@ -1596,7 +2036,7 @@
malloc_zone_register(malloc_zone_t *zone)
{
MALLOC_LOCK();
- malloc_zone_register_while_locked(zone);
+ malloc_zone_register_while_locked(zone, false);
MALLOC_UNLOCK();
}
@@ -1627,6 +2067,10 @@
--malloc_num_zones;
mprotect(malloc_zones, protect_size, PROT_READ);
+
+ // MAX(num_zones, 1) retains the fast path in find_registered_zone() for zone 0 even
+ // if it is a custom zone, e.g., ASan and user zones.
+ initial_num_zones = MAX(MIN(malloc_num_zones, initial_num_zones), 1);
// Exchange the roles of the FRZ counters. The counter that has captured the number of threads presently
// executing *inside* find_registered_zone is swapped with the counter drained to zero last time through.
@@ -1651,21 +2095,24 @@
void
malloc_set_zone_name(malloc_zone_t *z, const char *name)
{
- char *newName;
-
mprotect(z, sizeof(malloc_zone_t), PROT_READ | PROT_WRITE);
if (z->zone_name) {
- free((char *)z->zone_name);
+ malloc_zone_t *old_zone = find_registered_zone(z->zone_name, NULL, false);
+ if (old_zone) {
+ malloc_zone_free(old_zone, (char *)z->zone_name);
+ }
z->zone_name = NULL;
}
if (name) {
size_t buflen = strlen(name) + 1;
- newName = malloc_zone_malloc(z, buflen);
- if (newName) {
- strlcpy(newName, name, buflen);
- z->zone_name = (const char *)newName;
+ if (_dyld_is_memory_immutable(name, buflen)) {
+ z->zone_name = name;
} else {
- z->zone_name = NULL;
+ char *name_copy = _malloc_zone_malloc(z, buflen, MZ_NONE);
+ if (name_copy) {
+ strlcpy(name_copy, name, buflen);
+ z->zone_name = name_copy;
+ }
}
}
mprotect(z, sizeof(malloc_zone_t), PROT_READ);
@@ -1677,49 +2124,8 @@
return zone->zone_name;
}
-
-/********* Generic ANSI callouts ************/
-
-void *
-malloc(size_t size)
-{
- void *retval;
- retval = malloc_zone_malloc(default_zone, size);
- if (retval == NULL) {
- errno = ENOMEM;
- }
- return retval;
-}
-
-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;
- retval = malloc_zone_calloc(default_zone, num_items, size);
- if (retval == NULL) {
- errno = ENOMEM;
- }
- return retval;
-}
-
void
-free(void *ptr)
+find_zone_and_free(void *ptr, bool known_non_default)
{
malloc_zone_t *zone;
size_t size;
@@ -1727,7 +2133,7 @@
return;
}
- zone = find_registered_zone(ptr, &size);
+ zone = find_registered_zone(ptr, &size, known_non_default);
if (!zone) {
int flags = MALLOC_REPORT_DEBUG | MALLOC_REPORT_NOLOG;
if ((malloc_debug_flags & (MALLOC_ABORT_ON_CORRUPTION | MALLOC_ABORT_ON_ERROR))) {
@@ -1740,6 +2146,50 @@
} else {
malloc_zone_free(zone, ptr);
}
+}
+
+
+/********* 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 *
+calloc(size_t num_items, size_t size)
+{
+ return _malloc_zone_calloc(default_zone, num_items, size, MZ_POSIX);
+}
+
+void
+free(void *ptr)
+{
+ if (!ptr) {
+ return;
+ }
+
+ if (os_unlikely(malloc_instrumented ||
+ malloc_check_start ||
+ malloc_logger ||
+ lite_zone ||
+ malloc_num_zones == 0 ||
+ malloc_zones[0]->version < 13 ||
+ !malloc_zones[0]->try_free_default)) {
+ find_zone_and_free(ptr, false);
+ return;
+ }
+
+ malloc_zone_t *zone0 = malloc_zones[0];
+ zone0->try_free_default(zone0, ptr);
}
void *
@@ -1761,7 +2211,7 @@
if (!old_ptr) {
retval = malloc_zone_malloc(default_zone, new_size);
} else {
- zone = find_registered_zone(old_ptr, NULL);
+ zone = find_registered_zone(old_ptr, NULL, false);
if (!zone) {
int flags = MALLOC_REPORT_DEBUG | MALLOC_REPORT_NOLOG;
if (malloc_debug_flags & (MALLOC_ABORT_ON_CORRUPTION | MALLOC_ABORT_ON_ERROR)) {
@@ -1774,7 +2224,7 @@
}
if (retval == NULL) {
- errno = ENOMEM;
+ malloc_set_errno_fast(MZ_POSIX, ENOMEM);
} else if (new_size == 0) {
free(in_ptr);
}
@@ -1784,13 +2234,7 @@
void *
valloc(size_t size)
{
- void *retval;
- malloc_zone_t *zone = default_zone;
- retval = malloc_zone_valloc(zone, size);
- if (retval == NULL) {
- errno = ENOMEM;
- }
- return retval;
+ return _malloc_zone_valloc(default_zone, size, MZ_POSIX);
}
extern void
@@ -1808,7 +2252,7 @@
return size;
}
- (void)find_registered_zone(ptr, &size);
+ (void)find_registered_zone(ptr, &size, false);
return size;
}
@@ -1873,9 +2317,11 @@
return true;
}
- // Next, try the default zone, which is always present.
- if (malloc_zone_claimed_address(malloc_zones[0], 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
@@ -1885,10 +2331,9 @@
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;
+ 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;
@@ -1903,7 +2348,7 @@
reallocarray(void * in_ptr, size_t nmemb, size_t size){
size_t alloc_size;
if (os_mul_overflow(nmemb, size, &alloc_size)){
- errno = ENOMEM;
+ malloc_set_errno_fast(MZ_POSIX, ENOMEM);
return NULL;
}
return realloc(in_ptr, alloc_size);
@@ -1913,7 +2358,7 @@
reallocarrayf(void * in_ptr, size_t nmemb, size_t size){
size_t alloc_size;
if (os_mul_overflow(nmemb, size, &alloc_size)){
- errno = ENOMEM;
+ malloc_set_errno_fast(MZ_POSIX, ENOMEM);
return NULL;
}
return reallocf(in_ptr, alloc_size);
@@ -1933,7 +2378,7 @@
* and only search those.
*/
size_t size = 0;
- malloc_zone_t *zone = find_registered_zone(ptr, &size);
+ malloc_zone_t *zone = find_registered_zone(ptr, &size, false);
/* FIXME: would really like a zone->introspect->flags->purgeable check, but haven't determined
* binary compatibility impact of changing the introspect struct yet. */
@@ -2061,12 +2506,12 @@
if (!zone->batch_malloc) {
return 0;
}
- if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ if (malloc_check_start) {
internal_check();
}
unsigned batched = zone->batch_malloc(zone, size, results, num_requested);
- if (malloc_logger) {
+ if (os_unlikely(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,
@@ -2080,10 +2525,10 @@
void
malloc_zone_batch_free(malloc_zone_t *zone, void **to_be_freed, unsigned num)
{
- if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
+ if (malloc_check_start) {
internal_check();
}
- if (malloc_logger) {
+ if (os_unlikely(malloc_logger)) {
unsigned index = 0;
while (index < num) {
malloc_logger(
@@ -2335,11 +2780,9 @@
_malloc_fork_child(void)
{
#if CONFIG_NANOZONE
- if (_malloc_initialize_pred) {
+ if (_malloc_entropy_initialized) {
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());
+ nanov2_forked_zone((nanozonev2_t *)initial_nano_zone);
}
}
#endif
@@ -2437,6 +2880,12 @@
}
}
+void
+malloc_zero_on_free_disable(void)
+{
+ malloc_zero_policy = MALLOC_ZERO_NONE;
+}
+
/***************** OBSOLETE ENTRY POINTS ********************/
#if PHASE_OUT_OLD_MALLOC
@@ -2473,34 +2922,65 @@
}
#pragma mark -
+#pragma mark Malloc Thread Options
+
+typedef union {
+ malloc_thread_options_t options;
+ void *storage;
+} th_opts_t;
+
+MALLOC_STATIC_ASSERT(sizeof(th_opts_t) == sizeof(void *), "Options fit into pointer bits");
+
+malloc_thread_options_t
+malloc_get_thread_options(void)
+{
+ th_opts_t x = {.storage = _pthread_getspecific_direct(__TSD_MALLOC_THREAD_OPTIONS)};
+ return x.options;
+}
+
+void
+malloc_set_thread_options(malloc_thread_options_t opts)
+{
+ // Canonicalize options
+ if (opts.DisableExpensiveDebuggingOptions) {
+ opts.DisableProbabilisticGuardMalloc = true;
+ opts.DisableMallocStackLogging = true;
+ }
+
+ pgm_thread_set_disabled(opts.DisableProbabilisticGuardMalloc);
+
+ th_opts_t x = {.options = opts};
+ _pthread_setspecific_direct(__TSD_MALLOC_THREAD_OPTIONS, x.storage);
+}
+
+#pragma mark -
#pragma mark Malloc Stack Logging
+static bool _malloc_register_stack_logger(bool at_startup);
/* this is called from libsystem during initialization. */
-void
-__stack_logging_early_finished(const struct _malloc_functions *funcs)
+static void
+stack_logging_early_finished(const struct _malloc_late_init *funcs)
{
#if !TARGET_OS_DRIVERKIT
_dlopen = funcs->dlopen;
_dlsym = funcs->dlsym;
#endif
+ if (funcs->version >= 2 && funcs->msl) {
+ msl = *funcs->msl;
+ }
const char **env = (const char**) *_NSGetEnviron();
for (const char **e = env; *e; e++) {
if (0==strncmp(*e, "MallocStackLogging", 18)) {
- malloc_register_stack_logger();
- 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);
+ _malloc_register_stack_logger(true);
+ 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();
- }
+ if (msl.initialize) {
+ msl.initialize();
}
}
@@ -2510,45 +2990,70 @@
static void
register_msl_dylib(void *dylib)
{
+#if TARGET_OS_DRIVERKIT
+ set_msl_lite_hooks(msl.copy_msl_lite_hooks);
+#else
if (!dylib) {
return;
}
- msl.dylib = dylib;
+ msld.dylib = dylib;
msl.handle_memory_event = _dlsym(dylib, "msl_handle_memory_event");
msl.stack_logging_locked = _dlsym(dylib, "msl_stack_logging_locked");
msl.fork_prepare = _dlsym(dylib, "msl_fork_prepare");
msl.fork_child = _dlsym(dylib, "msl_fork_child");
msl.fork_parent = _dlsym(dylib, "msl_fork_parent");
+ msl.turn_on_stack_logging = _dlsym(dylib, "msl_turn_on_stack_logging");
+ msl.turn_off_stack_logging = _dlsym(dylib, "msl_turn_off_stack_logging");
+ msl.set_flags_from_environment = _dlsym(dylib, "msl_set_flags_from_environment");
+ msl.initialize = _dlsym(dylib, "msl_initialize");
+
// TODO delete these ones
- 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");
+ msld.get_frames_for_address = _dlsym(dylib, "msl_get_frames_for_address");
+ msld.stackid_for_vm_region = _dlsym(dylib, "msl_stackid_for_vm_region");
+ msld.get_frames_for_stackid = _dlsym(dylib, "msl_get_frames_for_stackid");
+ msld.uniquing_table_read_stack = _dlsym(dylib, "msl_uniquing_table_read_stack");
void (*msl_copy_msl_lite_hooks) (struct _malloc_msl_lite_hooks_s *hooksp, size_t size);
msl_copy_msl_lite_hooks = _dlsym(dylib, "msl_copy_msl_lite_hooks");
if (msl_copy_msl_lite_hooks) {
set_msl_lite_hooks(msl_copy_msl_lite_hooks);
}
+#endif
}
MALLOC_EXPORT
boolean_t
malloc_register_stack_logger(void)
{
- if (msl.dylib != NULL) {
+ return _malloc_register_stack_logger(false);
+}
+
+static bool
+_malloc_register_stack_logger(bool at_startup)
+{
+ void *dylib = NULL;
+ if (malloc_quarantine_enabled && !at_startup) {
+ return false;
+ }
+#if !TARGET_OS_DRIVERKIT
+ if (msl.handle_memory_event != NULL) {
return true;
}
- void *dylib = _dlopen("/System/Library/PrivateFrameworks/Alternate/MallocStackLogging.framework/MallocStackLogging", RTLD_GLOBAL);
+ if (_dlopen == NULL) {
+ return false;
+ }
+ dylib = _dlopen("/System/Library/PrivateFrameworks/MallocStackLogging.framework/MallocStackLogging", RTLD_GLOBAL);
if (dylib == NULL) {
- dylib = _dlopen("/System/Library/PrivateFrameworks/MallocStackLogging.framework/MallocStackLogging", RTLD_GLOBAL);
- }
+ return false;
+ }
+#endif
os_once(&_register_msl_dylib_pred, dylib, register_msl_dylib);
- if (!msl.dylib) {
+ if (!msl.handle_memory_event) {
malloc_report(ASL_LEVEL_WARNING, "failed to load MallocStackLogging.framework\n");
- }
- return msl.dylib == dylib;
+ return false;
+ }
+ return true;
}
/* Symbolication.framework looks up this symbol by name inside libsystem_malloc.dylib. */
@@ -2570,55 +3075,48 @@
turn_on_stack_logging(stack_logging_mode_type mode)
{
malloc_register_stack_logger();
- if (!msl.dylib) {
+ if (!msl.turn_on_stack_logging) {
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);
+ 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();
- }
-}
-
+ if (msl.turn_off_stack_logging) {
+ msl.turn_off_stack_logging();
+ }
+}
+
+//deprecated
kern_return_t
__mach_stack_logging_start_reading(task_t task, vm_address_t shared_memory_address, boolean_t *uses_lite_mode)
{
malloc_register_stack_logger();
- if (!msl.dylib) {
+ if (!msld.dylib) {
return KERN_FAILURE;
}
kern_return_t (*f) (task_t task, vm_address_t shared_memory_address, boolean_t *uses_lite_mode);
- f = _dlsym(msl.dylib, "msl_start_reading");
+ f = _dlsym(msld.dylib, "msl_start_reading");
if (!f) {
return KERN_FAILURE;
}
return f(task, shared_memory_address, uses_lite_mode);
}
+
+//deprecated
kern_return_t
__mach_stack_logging_stop_reading(task_t task)
{
malloc_register_stack_logger();
- if (!msl.dylib) {
+ if (!msld.dylib) {
return KERN_FAILURE;
}
kern_return_t (*f) (task_t task);
- f = _dlsym(msl.dylib, "msl_stop_reading");
+ f = _dlsym(msld.dylib, "msl_stop_reading");
if (!f) {
return KERN_FAILURE;
}
@@ -2633,23 +3131,23 @@
uint32_t *count)
{
malloc_register_stack_logger();
- if (!msl.get_frames_for_address) {
+ if (!msld.get_frames_for_address) {
return KERN_FAILURE;
}
- return msl.get_frames_for_address(task, address, stack_frames_buffer, max_stack_frames, count);
+ return msld.get_frames_for_address(task, address, stack_frames_buffer, max_stack_frames, count);
}
uint64_t
__mach_stack_logging_stackid_for_vm_region(task_t task, mach_vm_address_t address)
{
malloc_register_stack_logger();
- if (!msl.stackid_for_vm_region) {
+ if (!msld.stackid_for_vm_region) {
return -1ull;
}
- return msl.stackid_for_vm_region(task, address);
-}
-
-
+ return msld.stackid_for_vm_region(task, address);
+}
+
+//deprecated
kern_return_t
__mach_stack_logging_frames_for_uniqued_stack(task_t task,
uint64_t stack_identifier,
@@ -2658,12 +3156,13 @@
uint32_t *count)
{
malloc_register_stack_logger();
- if (!msl.get_frames_for_stackid) {
+ if (!msld.get_frames_for_stackid) {
return KERN_FAILURE;
}
- return msl.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, NULL);
-}
-
+ return msld.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, NULL);
+}
+
+//deprecated
kern_return_t
__mach_stack_logging_get_frames_for_stackid(task_t task,
uint64_t stack_identifier,
@@ -2673,12 +3172,13 @@
bool *last_frame_is_threadid)
{
malloc_register_stack_logger();
- if (!msl.get_frames_for_stackid) {
+ if (!msld.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);
-}
-
+ return msld.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, last_frame_is_threadid);
+}
+
+//deprecated
kern_return_t
__mach_stack_logging_uniquing_table_read_stack(struct backtrace_uniquing_table *uniquing_table,
uint64_t stackid,
@@ -2687,12 +3187,13 @@
uint32_t max_frames)
{
malloc_register_stack_logger();
- if (!msl.uniquing_table_read_stack) {
+ if (!msld.uniquing_table_read_stack) {
return KERN_FAILURE;
}
- return msl.uniquing_table_read_stack(uniquing_table, stackid, out_frames_buffer, out_frames_count, max_frames);
-}
-
+ return msld.uniquing_table_read_stack(uniquing_table, stackid, out_frames_buffer, out_frames_count, max_frames);
+}
+
+//deprecated
kern_return_t
__mach_stack_logging_enumerate_records(task_t task,
mach_vm_address_t address,
@@ -2704,93 +3205,100 @@
mach_vm_address_t address,
void enumerator(mach_stack_logging_record_t, void *),
void *context);
- if (!msl.dylib) {
+ if (!msld.dylib) {
return KERN_FAILURE;
}
- f = _dlsym(msl.dylib, "msl_disk_stack_logs_enumerate_from_task");
+ f = _dlsym(msld.dylib, "msl_disk_stack_logs_enumerate_from_task");
if (!f) {
return KERN_FAILURE;
}
return f(task, address, enumerator, context);
}
+
+//deprecated
struct backtrace_uniquing_table *
__mach_stack_logging_copy_uniquing_table(task_t task)
{
malloc_register_stack_logger();
struct backtrace_uniquing_table * (*f) (task_t task);
- if (!msl.dylib) {
+ if (!msld.dylib) {
return NULL;
}
- f = _dlsym(msl.dylib, "msl_uniquing_table_copy_from_task");
+ f = _dlsym(msld.dylib, "msl_uniquing_table_copy_from_task");
if (!f) {
return NULL;
}
return f(task);
}
+//deprecated
struct backtrace_uniquing_table *
__mach_stack_logging_uniquing_table_copy_from_serialized(void *buffer, size_t size)
{
malloc_register_stack_logger();
struct backtrace_uniquing_table * (*f) (void *buffer, size_t size);
- if (!msl.dylib) {
+ if (!msld.dylib) {
return NULL;
}
- f = _dlsym(msl.dylib, "msl_uniquing_table_copy_from_serialized");
+ f = _dlsym(msld.dylib, "msl_uniquing_table_copy_from_serialized");
if (!f) {
return NULL;
}
return f(buffer, size);
}
+//deprecated
void
__mach_stack_logging_uniquing_table_release(struct backtrace_uniquing_table *table)
{
malloc_register_stack_logger();
- if (!msl.dylib) {
+ if (!msld.dylib) {
return;
}
void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msl.dylib, "msl_uniquing_table_release");
+ f = _dlsym(msld.dylib, "msl_uniquing_table_release");
if (f) {
f(table);
}
}
+//deprecated
void
__mach_stack_logging_uniquing_table_retain(struct backtrace_uniquing_table *table)
{
malloc_register_stack_logger();
- if (!msl.dylib) {
+ if (!msld.dylib) {
return;
}
void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msl.dylib, "msl_uniquing_table_retain");
+ f = _dlsym(msld.dylib, "msl_uniquing_table_retain");
if (f) {
f(table);
}
}
+//deprecated
extern
size_t
__mach_stack_logging_uniquing_table_sizeof(struct backtrace_uniquing_table *table)
{
malloc_register_stack_logger();
size_t (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msl.dylib, "msl_uniquing_table_retain");
+ f = _dlsym(msld.dylib, "msl_uniquing_table_retain");
return f(table);
}
+//deprecated
void *
__mach_stack_logging_uniquing_table_serialize(struct backtrace_uniquing_table *table, mach_vm_size_t *size)
{
malloc_register_stack_logger();
- if (!msl.dylib) {
+ if (!msld.dylib) {
return NULL;
}
void * (*f) (struct backtrace_uniquing_table *table, mach_vm_size_t *size);
- f = _dlsym(msl.dylib, "msl_uniquing_table_serialize");
+ f = _dlsym(msld.dylib, "msl_uniquing_table_serialize");
if (!f) {
return NULL;
}