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--- libmalloc/libmalloc-409.60.6/src/malloc.c
+++ libmalloc/libmalloc-646.0.13/src/malloc.c
@@ -21,6 +21,13 @@
* @APPLE_LICENSE_HEADER_END@
*/
+/*
+ * Needed for definition of MALLOC_MSL_LITE_WRAPPED_ZONE_FLAGS
+ */
+#ifndef MALLOC_ENABLE_MSL_LITE_SPI
+#define MALLOC_ENABLE_MSL_LITE_SPI 1
+#endif // MALLOC_ENABLE_MSL_LITE_SPI
+
#include "internal.h"
#if MALLOC_TARGET_IOS
@@ -48,19 +55,48 @@
int32_t malloc_num_zones = 0;
int32_t malloc_num_zones_allocated = 0;
malloc_zone_t **malloc_zones = (malloc_zone_t **)0xdeaddeaddeaddead;
+
+// TODO: getter and setter rather than direct export so that this can be baked
+// into the cached fastpath checks
malloc_logger_t *malloc_logger = NULL;
static uint32_t initial_num_zones;
static malloc_zone_t *initial_scalable_zone;
+#if CONFIG_NANOZONE
static malloc_zone_t *initial_nano_zone;
+#endif // CONFIG_NANOZONE
+malloc_zone_t *initial_xzone_zone;
+static malloc_zone_t *default_purgeable_zone;
static bool has_injected_zone0;
+static bool malloc_xzone_enabled = MALLOC_XZONE_ENABLED_DEFAULT;
+
+typedef enum {
+ MALLOC_XZONE_OVERRIDE_DEFAULT,
+ MALLOC_XZONE_OVERRIDE_DISABLED,
+ MALLOC_XZONE_OVERRIDE_ENABLED,
+} malloc_xzone_override_t;
+
+static malloc_xzone_override_t malloc_xzone_enabled_override;
+static malloc_xzone_override_t malloc_xzone_nano_override;
+static malloc_xzone_override_t malloc_nano_on_xzone_override;
+
+#if CONFIG_CHECK_PLATFORM_BINARY
+static bool malloc_xzone_allow_non_platform;
+#endif // CONFIG_CHECK_PLATFORM_BINARY
unsigned malloc_debug_flags = 0;
bool malloc_tracing_enabled = false;
bool malloc_space_efficient_enabled = false;
bool malloc_medium_space_efficient_enabled = true;
-bool malloc_quarantine_enabled = false;
+bool malloc_sanitizer_enabled = false;
+
+bool malloc_interposition_compat = false;
+
+
+#if CONFIG_MALLOC_PROCESS_IDENTITY
+malloc_process_identity_t malloc_process_identity = MALLOC_PROCESS_NONE;
+#endif // CONFIG_MALLOC_PROCESS_IDENTITY
unsigned malloc_check_start = 0; // 0 means don't check
unsigned malloc_check_counter = 0;
@@ -68,42 +104,34 @@
static int malloc_check_sleep = 100; // default 100 second sleep
static int malloc_check_abort = 0; // default is to sleep, not abort
-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)
+bool malloc_slowpath = false;
+
static struct _malloc_msl_symbols msl = {};
-// TODO delete this, its only used some deprecated functions like turn_on_stack_logging,
-// which have been replaced by functions in MallocStackLogging.framework
-// (like msl_turn_on_stack_logging)
-static struct msl_dylib {
-
- void *dylib;
-
- kern_return_t (*get_frames_for_address)(task_t task,
- mach_vm_address_t address,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count);
-
- uint64_t (*stackid_for_vm_region) (task_t task, mach_vm_address_t address);
-
- kern_return_t (*get_frames_for_stackid) (task_t task,
- uint64_t stack_identifier,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count,
- bool *last_frame_is_threadid);
-
-
- kern_return_t (*uniquing_table_read_stack) (struct backtrace_uniquing_table *uniquing_table,
- uint64_t stackid,
- mach_vm_address_t *out_frames_buffer,
- uint32_t *out_frames_count,
- uint32_t max_frames);
-} msld = {};
+static struct malloc_sanitizer_poison *sanitizer = NULL;
+
+#if CONFIG_SANITIZER && TARGET_OS_OSX
+// Fallback pointers for memory poisoning functions from upstream ASan runtime
+static struct {
+ void (*memory_poison)(uintptr_t ptr, size_t sz);
+ void (*memory_unpoison)(uintptr_t ptr, size_t sz);
+} sanitizer_fallback_ptrs;
+
+// Fallback structure for heap allocation functions from our ASan runtime
+static struct malloc_sanitizer_poison sanitizer_fallback = {0};
+
+static void malloc_sanitizer_fallback_allocate_poison(uintptr_t ptr, size_t leftrz_sz, size_t alloc_sz, size_t rightrz_sz);
+static void malloc_sanitizer_fallback_deallocate_poison(uintptr_t ptr, size_t sz);
+#endif
+/* These masks are exported for libdispatch to register with (see "internal.h") */
+const unsigned long malloc_memorypressure_mask_default_4libdispatch = MALLOC_MEMORYPRESSURE_MASK_DEFAULT;
+const unsigned long malloc_memorypressure_mask_msl_4libdispatch = MALLOC_MEMORYPRESSURE_MASK_MSL;
+
+MALLOC_NOEXPORT malloc_zone_t* lite_zone = NULL;
/*
* Counters that coordinate zone destruction (in malloc_zone_unregister) with
@@ -123,6 +151,7 @@
#define MALLOC_LOG_TYPE_CLEARED stack_logging_flag_cleared
#define DEFAULT_MALLOC_ZONE_STRING "DefaultMallocZone"
+#define DEFAULT_SCALABLE_ZONE_STRING "DefaultScalableMallocZone"
#define DEFAULT_PUREGEABLE_ZONE_STRING "DefaultPurgeableMallocZone"
#define MALLOC_HELPER_ZONE_STRING "MallocHelperZone"
@@ -132,6 +161,11 @@
MALLOC_NOEXPORT
unsigned int logical_ncpus;
+#if CONFIG_MAGAZINE_PER_CLUSTER
+MALLOC_NOEXPORT
+unsigned int ncpuclusters;
+#endif // CONFIG_MAGAZINE_PER_CLUSTER
+
MALLOC_NOEXPORT
unsigned int hyper_shift;
@@ -153,6 +187,7 @@
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";
@@ -162,6 +197,9 @@
static const char medium_madvise_dram_scale_divisor_boot_arg[] = "malloc_medium_madvise_dram_scale_divisor";
#endif // CONFIG_MEDIUM_ALLOCATOR
+static
+bool malloc_report_config = false;
+
/********* Utilities ************/
static bool _malloc_entropy_initialized;
@@ -171,12 +209,29 @@
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;
+static dlopen_t LIBMALLOC_FUNCTION_PTRAUTH(_dlopen) = NULL;
+static dlsym_t LIBMALLOC_FUNCTION_PTRAUTH(_dlsym) = NULL;
#else
#define _dlopen(...) NULL
#define _dlsym(...) NULL
#endif // TARGET_OS_DRIVERKIT
+
+void
+malloc_slowpath_update(void)
+{
+ bool slowpath = has_injected_zone0 ||
+ malloc_num_zones == 0 ||
+ malloc_check_start ||
+ lite_zone ||
+ malloc_tracing_enabled ||
+ malloc_simple_stack_logging ||
+ (malloc_debug_flags & MALLOC_DO_SCRIBBLE) != 0 ||
+ malloc_interposition_compat;
+
+ if (malloc_slowpath != slowpath) {
+ malloc_slowpath = slowpath;
+ }
+}
void __malloc_init(const char *apple[]);
static void _malloc_initialize(const char *apple[], const char *bootargs);
@@ -298,6 +353,7 @@
}
}
+
#if CONFIG_MEDIUM_ALLOCATOR
#if TARGET_OS_OSX
#if defined(__x86_64__)
@@ -369,6 +425,276 @@
#endif // CONFIG_MEDIUM_ALLOCATOR
}
+#if CONFIG_MALLOC_PROCESS_IDENTITY
+
+static void
+_malloc_check_process_identity(const char *apple[])
+{
+ static const struct {
+ const char *name;
+ malloc_process_identity_t identity;
+ } name_identity_mapping[] = {
+#if TARGET_OS_SIMULATOR
+ { "launchd_sim", MALLOC_PROCESS_LAUNCHD, },
+ { "launchd_sim.development", MALLOC_PROCESS_LAUNCHD, },
+ { "launchd_sim.debug", MALLOC_PROCESS_LAUNCHD, },
+#else // TARGET_OS_SIMULATOR
+ { "launchd", MALLOC_PROCESS_LAUNCHD, },
+ { "launchd.development", MALLOC_PROCESS_LAUNCHD, },
+ { "launchd.debug", MALLOC_PROCESS_LAUNCHD, },
+ { "launchd.testing", MALLOC_PROCESS_LAUNCHD, },
+#endif // TARGET_OS_SIMULATOR
+ { "logd", MALLOC_PROCESS_LOGD, },
+ { "notifyd", MALLOC_PROCESS_NOTIFYD, },
+
+ { "mediaparserd", MALLOC_PROCESS_MEDIAPARSERD, },
+ { "videocodecd", MALLOC_PROCESS_VIDEOCODECD, },
+ { "mediaplaybackd", MALLOC_PROCESS_MEDIAPLAYBACKD },
+ { "audiomxd", MALLOC_PROCESS_AUDIOMXD, },
+ { "avconferenced", MALLOC_PROCESS_AVCONFERENCED, },
+ { "mediaserverd", MALLOC_PROCESS_MEDIASERVERD, },
+ { "cameracaptured", MALLOC_PROCESS_CAMERACAPTURED, },
+
+ { "MessagesBlastDoorService", MALLOC_PROCESS_BLASTDOOR_MESSAGES, },
+ { "MessagesAirlockService", MALLOC_PROCESS_BLASTDOOR_MESSAGES, },
+ { "IDSBlastDoorService", MALLOC_PROCESS_BLASTDOOR_IDS, },
+ { "IMDPersistenceAgent", MALLOC_PROCESS_IMDPERSISTENCEAGENT },
+ { "imagent", MALLOC_PROCESS_IMAGENT, },
+
+ { "ThumbnailExtensionSecure", MALLOC_PROCESS_QUICKLOOK_THUMBNAIL_SECURE, },
+ { "com.apple.quicklook.extension.previewUI", MALLOC_PROCESS_QUICKLOOK_PREVIEW, },
+ { "QuickLookUIExtension", MALLOC_PROCESS_QUICKLOOK_PREVIEW, },
+ { "ThumbnailExtension", MALLOC_PROCESS_QUICKLOOK_THUMBNAIL },
+#if TARGET_OS_OSX
+ // Load-bearing: not already MallocSpaceEfficient
+ { "QuickLookUIService", MALLOC_PROCESS_QUICKLOOK_UISERVICE },
+ // Already MallocSpaceEfficient, but valuable to identify as
+ // security-relevant for other special treatment
+ { "ThumbnailExtension_macOS", MALLOC_PROCESS_QUICKLOOK_THUMBNAIL },
+ { "QuickLookSatellite", MALLOC_PROCESS_QUICKLOOK_MACOS },
+ { "quicklookd", MALLOC_PROCESS_QUICKLOOK_MACOS },
+ { "com.apple.quicklook.ThumbnailsAgent", MALLOC_PROCESS_QUICKLOOK_MACOS },
+ { "ExternalQuickLookSatellite-arm64", MALLOC_PROCESS_QUICKLOOK_MACOS },
+ { "ExternalQuickLookSatellite-x86_64", MALLOC_PROCESS_QUICKLOOK_MACOS },
+#endif // TARGET_OS_OSX
+
+ { "MobileSafari", MALLOC_PROCESS_BROWSER, },
+ { "com.apple.WebKit.Networking", MALLOC_PROCESS_BROWSER, },
+ { "com.apple.WebKit.GPU", MALLOC_PROCESS_BROWSER, },
+ { "com.apple.WebKit.WebContent", MALLOC_PROCESS_BROWSER, },
+ { "com.apple.WebKit.WebContent.CaptivePortal", MALLOC_PROCESS_BROWSER, },
+ { "MTLCompilerService", MALLOC_PROCESS_MTLCOMPILERSERVICE },
+
+#if TARGET_OS_OSX
+ { "Safari", MALLOC_PROCESS_SAFARI, },
+ { "com.apple.Safari.CredentialExtractionHelper", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "com.apple.Safari.History", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "com.apple.Safari.SandboxBroker", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "com.apple.Safari.SearchHelper", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "com.apple.SafariFoundation.CredentialProviderExtensionHelper", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "com.apple.SafariPlatformSupport.Helper", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "com.apple.SafariServices.ExtensionHelper", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "com.apple.SafariServices", MALLOC_PROCESS_SAFARI_SUPPORT, },
+ { "VTDecoderXPCService", MALLOC_PROCESS_VTDECODERXPCSERVICE, },
+#endif // TARGET_OS_OSX
+
+ { "callservicesd", MALLOC_PROCESS_CALLSERVICESD, },
+ { "maild", MALLOC_PROCESS_MAILD, },
+ { "mDNSResponder", MALLOC_PROCESS_MDNSRESPONDER, },
+ { "ASVAssetViewer", MALLOC_PROCESS_ASVASSETVIEWER },
+ { "identityservicesd", MALLOC_PROCESS_IDENTITYSERVICESD, },
+ { "wifid", MALLOC_PROCESS_WIFID, },
+ { "fmfd", MALLOC_PROCESS_FMFD, },
+ { "searchpartyd", MALLOC_PROCESS_SEARCHPARTYD, },
+ { "vmd", MALLOC_PROCESS_VMD, },
+ { "CommCenter", MALLOC_PROCESS_COMMCENTER, },
+ { "wifip2pd", MALLOC_PROCESS_WIFIP2PD, },
+ { "wifianalyticsd", MALLOC_PROCESS_WIFIANALYTICSD, },
+
+ { "mds_stores", MALLOC_PROCESS_MDS_STORES },
+
+ { "AegirPoster", MALLOC_PROCESS_AEGIRPOSTER, },
+ { "CollectionsPoster", MALLOC_PROCESS_COLLECTIONSPOSTER, },
+ };
+
+ if (getpid() == 1) {
+ malloc_process_identity = MALLOC_PROCESS_LAUNCHD;
+ return;
+ }
+
+ const char *flag = _simple_getenv(apple, "HardenedRuntime");
+ if (flag) {
+ unsigned long long value = strtoull(flag, NULL, 0);
+ if (value) {
+ // reproduced from xnu
+ enum {
+ MallocBrowserHostEntitlementMask = 0x01,
+ MallocBrowserGPUEntitlementMask = 0x02,
+ MallocBrowserNetworkEntitlementMask = 0x04,
+ MallocBrowserWebContentEntitlementMask = 0x08,
+ };
+
+ long enablement_mask = MallocBrowserHostEntitlementMask |
+ MallocBrowserGPUEntitlementMask |
+ MallocBrowserNetworkEntitlementMask |
+ MallocBrowserWebContentEntitlementMask;
+ if (value & enablement_mask) {
+ malloc_process_identity = MALLOC_PROCESS_BROWSER;
+ return;
+ }
+ }
+ }
+
+ const char *name = getprogname();
+ for (size_t i = 0; i < countof(name_identity_mapping); i++) {
+ if (!strcmp(name, name_identity_mapping[i].name)) {
+ malloc_process_identity = name_identity_mapping[i].identity;
+ break;
+ }
+ }
+}
+
+#if !CONFIG_FEATUREFLAGS_SIMPLE
+#error "must have feature flags"
+#endif
+
+static bool
+_malloc_check_secure_allocator_process_enablement(void)
+{
+ // launchd is special because the feature flag check can't work for it
+ if (malloc_process_identity == MALLOC_PROCESS_LAUNCHD) {
+ return MALLOC_SECURE_ALLOCATOR_LAUNCHD_ENABLED_DEFAULT;
+ }
+
+#define ENABLEMENT_CASE(id, enable_status) \
+ case MALLOC_PROCESS_##id: \
+ return (enable_status);
+#define ENABLEMENT_CASE_FF(id, name, darwin_default, simulator_default) \
+ case MALLOC_PROCESS_##id: \
+ return malloc_secure_feature_enabled(SecureAllocator_process_##name, \
+ (darwin_default), (simulator_default))
+
+
+ switch (malloc_process_identity) {
+ ENABLEMENT_CASE(LOGD, true);
+ ENABLEMENT_CASE(NOTIFYD, true);
+
+ ENABLEMENT_CASE(MEDIAPARSERD, true);
+ ENABLEMENT_CASE(VIDEOCODECD, true);
+ ENABLEMENT_CASE(MEDIAPLAYBACKD, true);
+ ENABLEMENT_CASE(AVCONFERENCED, true);
+ ENABLEMENT_CASE(MEDIASERVERD, true);
+ ENABLEMENT_CASE(AUDIOMXD, true);
+ ENABLEMENT_CASE(CAMERACAPTURED, true);
+
+ ENABLEMENT_CASE(BLASTDOOR_MESSAGES, true);
+ ENABLEMENT_CASE(BLASTDOOR_IDS, true);
+ ENABLEMENT_CASE(IMDPERSISTENCEAGENT, true);
+ ENABLEMENT_CASE(IMAGENT, true);
+
+#if TARGET_OS_OSX
+ ENABLEMENT_CASE(QUICKLOOK_MACOS, true);
+ ENABLEMENT_CASE(QUICKLOOK_UISERVICE, true);
+#endif
+ ENABLEMENT_CASE(QUICKLOOK_THUMBNAIL_SECURE, true);
+ ENABLEMENT_CASE(QUICKLOOK_PREVIEW, true);
+ ENABLEMENT_CASE(QUICKLOOK_THUMBNAIL, true);
+
+#if TARGET_OS_OSX
+ ENABLEMENT_CASE_FF(MTLCOMPILERSERVICE, MTLCompilerService, false, false);
+#else
+ ENABLEMENT_CASE(MTLCOMPILERSERVICE, true);
+#endif
+
+ ENABLEMENT_CASE(CALLSERVICESD, true);
+ ENABLEMENT_CASE(MAILD, true);
+ ENABLEMENT_CASE(MDNSRESPONDER, true);
+ ENABLEMENT_CASE(ASVASSETVIEWER, true);
+ ENABLEMENT_CASE(IDENTITYSERVICESD, true);
+ ENABLEMENT_CASE(WIFID, true);
+ ENABLEMENT_CASE(FMFD, true);
+ ENABLEMENT_CASE(SEARCHPARTYD, true);
+ ENABLEMENT_CASE(VMD, true);
+ ENABLEMENT_CASE(WIFIP2PD, true);
+ ENABLEMENT_CASE(WIFIANALYTICSD, true);
+
+ ENABLEMENT_CASE(COMMCENTER, true);
+
+#if TARGET_OS_SIMULATOR
+ ENABLEMENT_CASE(BROWSER, false);
+#else
+ ENABLEMENT_CASE(BROWSER, true);
+#endif // TARGET_OS_SIMULATOR
+
+#if TARGET_OS_OSX
+ ENABLEMENT_CASE(SAFARI, true);
+ ENABLEMENT_CASE(SAFARI_SUPPORT, true);
+#endif
+
+ ENABLEMENT_CASE_FF(AEGIRPOSTER, aegirposter, false, false);
+ ENABLEMENT_CASE_FF(COLLECTIONSPOSTER, CollectionsPoster, false, false);
+
+#if TARGET_OS_OSX
+ ENABLEMENT_CASE(VTDECODERXPCSERVICE, true);
+#endif
+
+ ENABLEMENT_CASE(MDS_STORES, true);
+
+ default:
+ return false;
+ }
+}
+
+#endif // CONFIG_MALLOC_PROCESS_IDENTITY
+
+static void
+_malloc_init_featureflags(void)
+{
+#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;
+ }
+
+ bool secure_allocator = false;
+#if CONFIG_MALLOC_PROCESS_IDENTITY
+ if (malloc_process_identity != MALLOC_PROCESS_NONE) {
+ secure_allocator = _malloc_check_secure_allocator_process_enablement();
+ } else
+#endif // CONFIG_MALLOC_PROCESS_IDENTITY
+ {
+#if MALLOC_TARGET_IOS_ONLY
+ secure_allocator = malloc_secure_feature_enabled(
+ SecureAllocator_SystemWide, true, true);
+#else
+ secure_allocator = malloc_secure_feature_enabled(
+ SecureAllocator_SystemWide, false, false);
+#endif // MALLOC_TARGET_IOS_ONLY
+ }
+
+#if TARGET_OS_OSX && !TARGET_CPU_ARM64
+ if (!os_feature_enabled_simple(libmalloc, SecureAllocator_Intel, false)) {
+ secure_allocator = false;
+ }
+#endif // TARGET_OS_OSX && !TARGET_CPU_ARM64
+
+#if TARGET_OS_OSX
+ bool allow_non_platform = os_feature_enabled_simple(libmalloc,
+ SecureAllocator_NonPlatform, false);
+ if (malloc_xzone_allow_non_platform != allow_non_platform) {
+ malloc_xzone_allow_non_platform = allow_non_platform;
+ }
+#endif // TARGET_OS_OSX
+
+ if (secure_allocator != malloc_xzone_enabled) {
+ malloc_xzone_enabled = secure_allocator;
+ }
+#endif // CONFIG_FEATUREFLAGS_SIMPLE
+}
+
extern malloc_zone_t *force_asan_init_if_present(void)
asm("_malloc_default_zone");
@@ -382,7 +708,11 @@
char bootargs[1024] = { '\0' };
bool allow_bootargs = true;
#if CONFIG_FEATUREFLAGS_SIMPLE
- allow_bootargs &= os_feature_enabled_simple(libmalloc, EnableBootArgs, false);
+ // os_feature_enabled_simple() doesn't work in launchd, but launchd should
+ // be able to read boot-args
+ if (getpid() != 1) {
+ allow_bootargs &= os_feature_enabled_simple(libmalloc, EnableBootArgs, false);
+ }
#endif
#if defined(_COMM_PAGE_DEV_FIRM)
allow_bootargs &= !!*((uint32_t *)_COMM_PAGE_DEV_FIRM);
@@ -395,19 +725,29 @@
bootargs[len + 1] = '\0';
}
-#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;
+
+#if CONFIG_CHECK_PLATFORM_BINARY
+ bool is_platform_binary = _malloc_is_platform_binary();
+ if (malloc_is_platform_binary != is_platform_binary) {
+ malloc_is_platform_binary = is_platform_binary;
+ }
+#endif
+
+#if CONFIG_CHECK_SECURITY_POLICY
+ bool allow_internal_security = _malloc_allow_internal_security_policy();
+ if (allow_internal_security != malloc_internal_security_policy) {
+ malloc_internal_security_policy = allow_internal_security;
+ }
+#endif
+
+#if CONFIG_MALLOC_PROCESS_IDENTITY
+ _malloc_check_process_identity(apple);
+#endif
+
+ _malloc_init_featureflags();
const char **p;
const char *malloc_experiments = NULL;
@@ -470,18 +810,36 @@
stack_logging_early_finished(mli);
initial_num_zones = malloc_num_zones;
-#if CONFIG_QUARANTINE
- if (malloc_quarantine_enabled) {
- quarantine_reset_environment();
- }
+#if CONFIG_SANITIZER
+ if (malloc_sanitizer_enabled) {
+ sanitizer_reset_environment();
+
+#if TARGET_OS_OSX
+ // Fetch the memory poisoning functions from the upstream ASan runtime
+ sanitizer_fallback_ptrs.memory_poison = _dlsym(RTLD_MAIN_ONLY, "__asan_poison_memory_region");
+ sanitizer_fallback_ptrs.memory_unpoison = _dlsym(RTLD_MAIN_ONLY, "__asan_unpoison_memory_region");
+
+ // Prefer the heap allocation functions from our ASan runtime, if available
+ void *heap_alloc = _dlsym(RTLD_MAIN_ONLY, "__asan_poison_heap_memory_alloc"),
+ *heap_dealloc = _dlsym(RTLD_MAIN_ONLY, "__asan_poison_heap_memory_free"),
+ *heap_internal_poison = _dlsym(RTLD_MAIN_ONLY, "__asan_poison_heap_memory_internal");
+ if (heap_alloc && heap_dealloc && heap_internal_poison) {
+ sanitizer_fallback.heap_allocate_poison = heap_alloc;
+ sanitizer_fallback.heap_deallocate_poison = heap_dealloc;
+ sanitizer_fallback.heap_internal_poison = heap_internal_poison;
+ } else {
+ sanitizer_fallback.heap_allocate_poison = &malloc_sanitizer_fallback_allocate_poison;
+ sanitizer_fallback.heap_deallocate_poison = &malloc_sanitizer_fallback_deallocate_poison;
+ sanitizer_fallback.heap_internal_poison = &malloc_sanitizer_fallback_deallocate_poison;
+ }
#endif
-}
-
-MALLOC_NOEXPORT malloc_zone_t* lite_zone = NULL;
+ }
+#endif
+}
MALLOC_ALWAYS_INLINE
static inline malloc_zone_t *
-runtime_default_zone() {
+runtime_default_zone(void) {
return (lite_zone) ? lite_zone : inline_malloc_default_zone();
}
@@ -719,7 +1077,7 @@
default_zone_malloc_claimed_address,
};
-static malloc_zone_t *default_zone = &virtual_default_zone.malloc_zone;
+MALLOC_NOEXPORT malloc_zone_t *default_zone = &virtual_default_zone.malloc_zone;
MALLOC_NOEXPORT
/*static*/ boolean_t
@@ -728,9 +1086,9 @@
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 *, size_t *, bool) __attribute__((always_inline));
static inline malloc_zone_t *
-find_registered_zone(const void *ptr, size_t *returned_size, bool known_non_default)
+_find_registered_zone(const void *ptr, size_t *returned_size, bool known_non_default)
{
// Returns a zone which contains ptr, else NULL
@@ -818,6 +1176,13 @@
return zone;
}
+malloc_zone_t *
+find_registered_zone(const void *ptr, size_t *returned_size,
+ bool known_non_default)
+{
+ return _find_registered_zone(ptr, returned_size, known_non_default);
+}
+
void
malloc_error_break(void)
{
@@ -940,6 +1305,7 @@
// 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_slowpath_update();
}
//malloc_report(ASL_LEVEL_INFO, "Registered malloc_zone %p in malloc_zones %p [%u zones, %u bytes]\n", zone, malloc_zones,
@@ -956,6 +1322,11 @@
{
phys_ncpus = *(uint8_t *)(uintptr_t)_COMM_PAGE_PHYSICAL_CPUS;
logical_ncpus = *(uint8_t *)(uintptr_t)_COMM_PAGE_LOGICAL_CPUS;
+#if CONFIG_MAGAZINE_PER_CLUSTER
+ {
+ ncpuclusters = *(uint8_t *)(uintptr_t)_COMM_PAGE_CPU_CLUSTERS;
+ }
+#endif // CONFIG_MAGAZINE_PER_CLUSTER
if (0 != (logical_ncpus % phys_ncpus)) {
MALLOC_REPORT_FATAL_ERROR(logical_ncpus % phys_ncpus,
@@ -992,78 +1363,133 @@
max_medium_magazines = max_magazines;
}
- set_flags_from_environment(); // will only set flags up to two times
-
- 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();
+ // The "single-cluster" concept doesn't apply to macOS: there is no
+ // non-Intel real hardware without multiple AMP clusters, so this will only
+ // happen under virtualization, and for that case we'd prefer the
+ // straight-to-pcpu behaviour rather than falling back to the old allocator.
+#if CONFIG_MAGAZINE_PER_CLUSTER && !(TARGET_OS_OSX || MALLOC_TARGET_DK_OSX)
+ if (ncpuclusters == 1) {
+#if CONFIG_FEATUREFLAGS_SIMPLE
+ // Not with the other feature flag checks because ncpuclusters needs to
+ // be initialized first
+ bool secure_allocator_single_cluster = os_feature_enabled_simple(
+ libmalloc, SecureAllocator_SingleCluster, false);
+#else // CONFIG_FEATUREFLAGS_SIMPLE
+ bool secure_allocator_single_cluster = false;
+#endif // CONFIG_FEATUREFLAGS_SIMPLE
+ if (malloc_xzone_enabled && !secure_allocator_single_cluster) {
+ malloc_xzone_enabled = false;
+ }
+ }
+#endif // CONFIG_MAGAZINE_PER_CLUSTER && !(TARGET_OS_OSX || MALLOC_TARGET_DK_OSX)
+
+ _malloc_detect_interposition();
+
+
+ set_flags_from_environment();
+
+
+#if CONFIG_SANITIZER
+ malloc_sanitizer_enabled = sanitizer_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
+ // Disable nano when:
+ // - sanitizer 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 &&
+ if (!malloc_sanitizer_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);
+ bool nano_on_xzone = false;
+
+
+ if (!initial_xzone_zone || nano_on_xzone) {
+ if (!initial_xzone_zone) {
+ initial_scalable_zone = create_scalable_zone(0, malloc_debug_flags);
+ malloc_set_zone_name(initial_scalable_zone, DEFAULT_MALLOC_ZONE_STRING);
+ malloc_zone_register_while_locked(initial_scalable_zone, /*make_default=*/true);
+ }
#if CONFIG_NANOZONE
- nano_common_configure();
-
- malloc_zone_t *helper_zone = initial_scalable_zone;
-
- if (_malloc_engaged_nano == NANO_V2) {
- initial_nano_zone = nanov2_create_zone(helper_zone, malloc_debug_flags);
- }
-
- if (initial_nano_zone) {
- malloc_set_zone_name(initial_nano_zone, DEFAULT_MALLOC_ZONE_STRING);
- malloc_set_zone_name(helper_zone, MALLOC_HELPER_ZONE_STRING);
- malloc_zone_register_while_locked(initial_nano_zone, /*make_default=*/true);
- }
+ nano_common_configure();
+
+ malloc_zone_t *helper_zone = initial_xzone_zone ?: initial_scalable_zone;
+
+ if (_malloc_engaged_nano == NANO_V2) {
+ if (malloc_report_config) {
+ bool nano_on_xzone_enabled = (helper_zone == initial_xzone_zone);
+ malloc_report(ASL_LEVEL_INFO, "NanoV2 Config:\n"
+ "\tNano On Xzone: %d\n",
+ nano_on_xzone_enabled);
+ }
+ 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) {
+ }
+
+#if CONFIG_SANITIZER
+ if (malloc_sanitizer_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);
+ malloc_zone_t *sanitizer_zone = sanitizer_create_zone(wrapped_zone);
+ malloc_zone_register_while_locked(sanitizer_zone, /*make_default=*/true);
}
#endif
+ // Initialize slowpath check after we've registered zones so that
+ // malloc_num_zones check is meaningful
+ malloc_slowpath_update();
+
initial_num_zones = malloc_num_zones;
#if CONFIG_DEFERRED_RECLAIM
+ kern_return_t vmdr_kr = KERN_SUCCESS;
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");
+ if (initial_xzone_zone) {
+ // xzone_malloc will own the deferred_reclaim buffer
+ large_cache_enabled = false;
+ } else {
+ vmdr_kr = mvm_deferred_reclaim_init();
+ if (vmdr_kr != KERN_SUCCESS) {
+ large_cache_enabled = false;
+ malloc_report(ASL_LEVEL_ERR, "Unable to set up reclaim buffer (%d) - disabling large cache\n", vmdr_kr);
+ }
}
}
#endif /* CONFIG_DEFERRED_RECLAIM */
+
+ if (malloc_report_config && initial_scalable_zone) {
+ bool scribble = !!(malloc_debug_flags & MALLOC_DO_SCRIBBLE);
+ malloc_report(ASL_LEVEL_INFO, "Magazine Config:\n"
+ "\tMax Magazines: %d\n"
+ "\tMedium Enabled: %d\n"
+ "\tAggressive Madvise: %d\n"
+#if CONFIG_DEFERRED_RECLAIM
+ "\tLarge Cache: %d%s\n"
+#endif // CONFIG_DEFERRED_RECLAIM
+ "\tScribble: %d\n",
+ max_magazines, magazine_medium_enabled,
+ aggressive_madvise_enabled,
+#if CONFIG_DEFERRED_RECLAIM
+ vmdr_kr ?: large_cache_enabled, vmdr_kr ? " (ERROR)" : "",
+#endif // CONFIG_DEFERRED_RECLAIM
+ scribble);
+ }
#if CONFIG_MEDIUM_ALLOCATOR
uint64_t memsize = platform_hw_memsize();
@@ -1083,21 +1509,21 @@
// (unsigned)&malloc_num_zones);
}
-static bool internal_build;
static bool
-enable_pgm(void)
-{
- bool other_debug_tool = has_injected_zone0 || malloc_quarantine_enabled;
- return !other_debug_tool && pgm_should_enable(internal_build);
+enable_pgm(unsigned flags)
+{
+ bool other_debug_tool = has_injected_zone0 || malloc_sanitizer_enabled;
+ // To avoid allocations in the lite helper zone that don't have msl data at
+ // the end of the allocation, don't enable PGM on the lite helper zone
+ bool zone_is_msl = flags & MALLOC_MSL_LITE_WRAPPED_ZONE_FLAGS;
+ return !other_debug_tool && !zone_is_msl && pgm_should_enable();
}
static void
register_pgm_zone(bool internal_diagnostics)
{
- if (internal_diagnostics) {
- internal_build = true;
- }
- if (enable_pgm()) {
+ pgm_init_config(internal_diagnostics);
+ if (enable_pgm(0)) {
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);
@@ -1161,30 +1587,16 @@
malloc_engaged_nano(void)
{
#if CONFIG_NANOZONE
- return _malloc_engaged_nano;
+ return (initial_nano_zone || initial_xzone_zone) ? _malloc_engaged_nano : 0;
#else
return 0;
#endif
}
-malloc_zone_t *
-malloc_default_purgeable_zone(void)
-{
- static malloc_zone_t *dpz;
-
- if (!dpz) {
- //
- // PR_7288598: Must pass a *scalable* zone (szone) as the helper for create_purgeable_zone().
- // Take care that the zone so obtained is not subject to interposing.
- //
- malloc_zone_t *tmp = create_purgeable_zone(0, initial_scalable_zone, malloc_debug_flags);
- malloc_zone_register(tmp);
- malloc_set_zone_name(tmp, DEFAULT_PUREGEABLE_ZONE_STRING);
- if (!OSAtomicCompareAndSwapPtrBarrier(NULL, tmp, (void**)&dpz)) {
- malloc_destroy_zone(tmp);
- }
- }
- return dpz;
+int
+malloc_engaged_secure_allocator(void)
+{
+ return !!initial_xzone_zone;
}
static void
@@ -1195,7 +1607,7 @@
const char **p;
const char *c;
-#if __LP64__
+#if defined(__LP64__)
malloc_debug_flags = MALLOC_ABORT_ON_CORRUPTION; // Set always on 64-bit processes
#else
int libSystemVersion = NSVersionOfLinkTimeLibrary("System");
@@ -1287,8 +1699,11 @@
if (getenv("MallocSimpleStackLogging")) {
malloc_simple_stack_logging = true;
}
-
-#if __LP64__
+ if (getenv("MallocReportConfig")) {
+ malloc_report_config = true;
+ }
+
+#if defined(__LP64__)
/* initialization above forces MALLOC_ABORT_ON_CORRUPTION of 64-bit processes */
#else
flag = getenv("MallocCorruptionAbort");
@@ -1346,9 +1761,19 @@
}
#endif // RDAR_48993662
if (flag) {
- int value = (unsigned)strtol(flag, NULL, 0);
+
+ int value = (int)strtol(flag, NULL, 0);
if (value == 0) {
malloc_report(ASL_LEVEL_INFO, "Maximum magazines defaulted to %d\n", max_magazines);
+#if CONFIG_MAGAZINE_PER_CLUSTER
+ } else if (value == UINT16_MAX) {
+ {
+ max_magazines = ncpuclusters;
+ malloc_report(ASL_LEVEL_INFO,
+ "Maximum magazines limited to ncpuclusters (%d)\n",
+ max_magazines);
+ }
+#endif // CONFIG_MAGAZINE_PER_CLUSTER
} else if (value < 0) {
malloc_report(ASL_LEVEL_ERR, "Maximum magazines must be positive - ignored.\n");
} else if (value > logical_ncpus) {
@@ -1543,6 +1968,46 @@
"malloc_zero_on_free_sample_period must be positive - ignored.\n");
}
}
+
+ flag = getenv("MallocSecureAllocator");
+ if (flag && malloc_internal_security_policy) {
+ const char *endp;
+ long value = malloc_common_convert_to_long(flag, &endp);
+ if (!*endp && endp != flag && (value == 0 || value == 1)) {
+ malloc_xzone_enabled = value;
+ malloc_xzone_enabled_override = value ?
+ MALLOC_XZONE_OVERRIDE_ENABLED :
+ MALLOC_XZONE_OVERRIDE_DISABLED;
+ } else {
+ malloc_report(ASL_LEVEL_ERR, "MallocSecureAllocator must be 0 or 1.\n");
+ }
+ }
+
+ flag = getenv("MallocSecureAllocatorNano");
+ if (flag) {
+ const char *endp;
+ long value = malloc_common_convert_to_long(flag, &endp);
+ if (!*endp && endp != flag && (value == 0 || value == 1)) {
+ malloc_xzone_nano_override = value ? MALLOC_XZONE_OVERRIDE_ENABLED :
+ MALLOC_XZONE_OVERRIDE_DISABLED;
+ } else {
+ malloc_report(ASL_LEVEL_ERR, "MallocSecureAllocatorNano must be 0 or 1.\n");
+ }
+ }
+
+ flag = getenv("MallocNanoOnXzone");
+ if (flag) {
+ const char *endp;
+ long value = malloc_common_convert_to_long(flag, &endp);
+ if (!*endp && endp != flag && (value == 0 || value == 1)) {
+ malloc_nano_on_xzone_override = value ? MALLOC_XZONE_OVERRIDE_ENABLED :
+ MALLOC_XZONE_OVERRIDE_DISABLED;
+ } else {
+ malloc_report(ASL_LEVEL_ERR, "MallocNanoOnXzone must be 0 or 1.\n");
+ }
+ }
+
+
if (getenv("MallocHelp")) {
malloc_report(ASL_LEVEL_INFO,
@@ -1570,25 +2035,32 @@
}
}
+
malloc_zone_t *
malloc_create_zone(vm_size_t start_size, unsigned flags)
{
- malloc_zone_t *zone;
+ malloc_zone_t *zone = NULL;
/* start_size doesn't actually appear to be used, but we test anyway. */
if (start_size > malloc_absolute_max_size) {
return NULL;
}
- zone = create_scalable_zone(start_size, flags | malloc_debug_flags);
+
+ if (!zone) {
+ zone = create_scalable_zone(start_size, flags | malloc_debug_flags);
+ }
+
+ if (enable_pgm(flags)) {
+ malloc_zone_t *pgm_zone = pgm_create_zone(zone);
+ MALLOC_LOCK();
+ malloc_zone_register_while_locked(pgm_zone, false);
+ malloc_zone_register_while_locked(zone, false);
+ MALLOC_UNLOCK();
+ return pgm_zone;
+ }
+
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;
}
@@ -1720,7 +2192,19 @@
_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);
+ uint64_t type_id = malloc_get_tsd_type_id();
+#if MALLOC_TARGET_64BIT
+ bool clear_type = false;
+ if (!type_id) {
+ malloc_type_descriptor_t fallback =
+ malloc_callsite_fallback_type_descriptor();
+ malloc_set_tsd_type_descriptor(fallback);
+ type_id = fallback.type_id;
+ clear_type = true;
+ }
+#endif // MALLOC_TARGET_64BIT
+ MALLOC_TRACE(TRACE_malloc | DBG_FUNC_START, (uintptr_t)zone, size, type_id,
+ 0);
void *ptr = NULL;
@@ -1734,7 +2218,8 @@
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);
+ 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)) {
@@ -1742,15 +2227,21 @@
ptr, (unsigned long long)size);
}
- MALLOC_TRACE(TRACE_malloc | DBG_FUNC_END, (uintptr_t)zone, size, (uintptr_t)ptr, 0);
+ MALLOC_TRACE(TRACE_malloc | DBG_FUNC_END, (uintptr_t)zone, size,
+ (uintptr_t)ptr, type_id);
out:
+#if MALLOC_TARGET_64BIT
+ if (clear_type) {
+ malloc_set_tsd_type_descriptor(MALLOC_TYPE_DESCRIPTOR_NONE);
+ }
+#endif // MALLOC_TARGET_64BIT
if (os_unlikely(ptr == NULL)) {
malloc_set_errno_fast(mzo, ENOMEM);
}
return ptr;
}
-static void *
+void *
_malloc_zone_malloc(malloc_zone_t *zone, size_t size, malloc_zone_options_t mzo)
{
if (zone == default_zone && !lite_zone) {
@@ -1759,8 +2250,7 @@
zone = malloc_zones[0];
}
- if (os_unlikely(malloc_instrumented || malloc_check_start ||
- malloc_logger || zone->version < 13)) {
+ if (os_unlikely(malloc_slowpath || malloc_logger || zone->version < 13)) {
return _malloc_zone_malloc_instrumented_or_legacy(zone, size, mzo);
}
@@ -1769,10 +2259,16 @@
return NULL;
}
+ if (zone->version >= 16) {
+ return zone->malloc_type_malloc(zone, size,
+ malloc_callsite_fallback_type_id());
+ }
+
// zone versions >= 13 set errno on failure so we can tail-call
return zone->malloc(zone, size);
}
+MALLOC_NOINLINE
void *
malloc_zone_malloc(malloc_zone_t *zone, size_t size)
{
@@ -1784,7 +2280,19 @@
_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);
+ uint64_t type_id = malloc_get_tsd_type_id();
+#if MALLOC_TARGET_64BIT
+ bool clear_type = false;
+ if (!type_id) {
+ malloc_type_descriptor_t fallback =
+ malloc_callsite_fallback_type_descriptor();
+ malloc_set_tsd_type_descriptor(fallback);
+ type_id = fallback.type_id;
+ clear_type = true;
+ }
+#endif // MALLOC_TARGET_64BIT
+ MALLOC_TRACE(TRACE_calloc | DBG_FUNC_START, (uintptr_t)zone, num_items,
+ size, type_id);
void *ptr;
if (malloc_check_start) {
@@ -1794,16 +2302,25 @@
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,
+ uint32_t logger_type = MALLOC_LOG_TYPE_ALLOCATE |
+ MALLOC_LOG_TYPE_HAS_ZONE | MALLOC_LOG_TYPE_CLEARED;
+ malloc_logger(logger_type, (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);
+ 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 MALLOC_TARGET_64BIT
+ if (clear_type) {
+ malloc_set_tsd_type_descriptor(MALLOC_TYPE_DESCRIPTOR_NONE);
+ }
+#endif // MALLOC_TARGET_64BIT
if (os_unlikely(ptr == NULL)) {
malloc_set_errno_fast(mzo, ENOMEM);
}
@@ -1811,7 +2328,7 @@
}
MALLOC_NOINLINE
-static void *
+void *
_malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size,
malloc_zone_options_t mzo)
{
@@ -1821,15 +2338,20 @@
zone = malloc_zones[0];
}
- if (os_unlikely(malloc_instrumented || malloc_check_start ||
- malloc_logger || zone->version < 13)) {
+ if (os_unlikely(malloc_slowpath || malloc_logger || zone->version < 13)) {
return _malloc_zone_calloc_instrumented_or_legacy(zone, num_items, size, mzo);
+ }
+
+ if (zone->version >= 16) {
+ return zone->malloc_type_calloc(zone, num_items, size,
+ malloc_callsite_fallback_type_id());
}
// zone versions >= 13 set errno on failure so we can tail-call
return zone->calloc(zone, num_items, size);
}
+MALLOC_NOINLINE
void *
malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size)
{
@@ -1837,10 +2359,22 @@
}
MALLOC_NOINLINE
-static void *
+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);
+ uint64_t type_id = malloc_get_tsd_type_id();
+#if MALLOC_TARGET_64BIT
+ bool clear_type = false;
+ if (!type_id) {
+ malloc_type_descriptor_t fallback =
+ malloc_callsite_fallback_type_descriptor();
+ malloc_set_tsd_type_descriptor(fallback);
+ type_id = fallback.type_id;
+ clear_type = true;
+ }
+#endif // MALLOC_TARGET_64BIT
+ MALLOC_TRACE(TRACE_valloc | DBG_FUNC_START, (uintptr_t)zone, size, type_id,
+ 0);
void *ptr = NULL;
if (malloc_check_start) {
@@ -1853,7 +2387,8 @@
ptr = zone->valloc(zone, size);
if (os_unlikely(malloc_logger)) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
+ malloc_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)) {
@@ -1861,49 +2396,93 @@
ptr, (unsigned long long)size);
}
- MALLOC_TRACE(TRACE_valloc | DBG_FUNC_END, (uintptr_t)zone, size, (uintptr_t)ptr, 0);
+ MALLOC_TRACE(TRACE_valloc | DBG_FUNC_END, (uintptr_t)zone, size,
+ (uintptr_t)ptr, type_id);
out:
+#if MALLOC_TARGET_64BIT
+ if (clear_type) {
+ malloc_set_tsd_type_descriptor(MALLOC_TYPE_DESCRIPTOR_NONE);
+ }
+#endif // MALLOC_TARGET_64BIT
+
if (os_unlikely(ptr == NULL)) {
malloc_set_errno_fast(mzo, ENOMEM);
}
return ptr;
}
+MALLOC_NOINLINE
void *
malloc_zone_valloc(malloc_zone_t *zone, size_t size)
{
return _malloc_zone_valloc(zone, size, MZ_NONE);
}
+// We have this function so code within libmalloc can call it without going
+// through the (potentially interposed) dyld symbol stub
void *
-malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size)
-{
- MALLOC_TRACE(TRACE_realloc | DBG_FUNC_START, (uintptr_t)zone, (uintptr_t)ptr, size, 0);
-
- void *new_ptr;
+_malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size,
+ malloc_type_descriptor_t type_desc)
+{
+ uint64_t type_id = malloc_get_tsd_type_id();
+#if MALLOC_TARGET_64BIT
+ bool clear_type = false;
+ if (!type_id) {
+ // A type descriptor in the TSD takes precendence over one passed as a
+ // parameter - the one in the TSD will be a real one set by e.g.
+ // _malloc_type_realloc_outlined(), whereas the parameter will be a
+ // callsite-derived fallback
+ malloc_set_tsd_type_descriptor(type_desc);
+ type_id = type_desc.type_id;
+ clear_type = true;
+ }
+#endif // MALLOC_TARGET_64BIT
+ MALLOC_TRACE(TRACE_realloc | DBG_FUNC_START, (uintptr_t)zone,
+ (uintptr_t)ptr, size, type_id);
+
+ void *new_ptr = NULL;
if (malloc_check_start) {
internal_check();
}
if (size > malloc_absolute_max_size) {
- return NULL;
+ goto out;
}
new_ptr = zone->realloc(zone, ptr, size);
if (os_unlikely(malloc_logger)) {
- malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone,
- (uintptr_t)ptr, (uintptr_t)size, (uintptr_t)new_ptr, 0);
+ uint32_t logger_type = MALLOC_LOG_TYPE_ALLOCATE |
+ MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE;
+ malloc_logger(logger_type, (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);
+ 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);
+out:
+#if MALLOC_TARGET_64BIT
+ if (clear_type) {
+ malloc_set_tsd_type_descriptor(MALLOC_TYPE_DESCRIPTOR_NONE);
+ }
+#endif // MALLOC_TARGET_64BIT
return new_ptr;
}
+MALLOC_NOINLINE
+void *
+malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size)
+{
+ return _malloc_zone_realloc(zone, ptr, size,
+ malloc_callsite_fallback_type_descriptor());
+}
+
+MALLOC_NOINLINE
void
malloc_zone_free(malloc_zone_t *zone, void *ptr)
{
@@ -1947,20 +2526,35 @@
if (!ptr) {
return NULL;
} else {
- return find_registered_zone(ptr, NULL, false);
+ return _find_registered_zone(ptr, NULL, false);
}
}
MALLOC_NOINLINE
-static void *
+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);
+ malloc_zone_options_t mzo, malloc_type_descriptor_t type_desc)
+{
+ uint64_t type_id = malloc_get_tsd_type_id();
+#if MALLOC_TARGET_64BIT
+ bool clear_type = false;
+ if (!type_id) {
+ // A type descriptor in the TSD takes precendence over one passed as a
+ // parameter - the one in the TSD will be a real one set by e.g.
+ // _malloc_type_aligned_alloc_outlined(), whereas the parameter will
+ // usually be a callsite-derived fallback
+ malloc_set_tsd_type_descriptor(type_desc);
+ type_id = type_desc.type_id;
+ clear_type = true;
+ }
+#endif // MALLOC_TARGET_64BIT
+ MALLOC_TRACE(TRACE_memalign | DBG_FUNC_START, (uintptr_t)zone, alignment,
+ size, type_id);
void *ptr = NULL;
int err = ENOMEM;
- if (zone->version < 5) { // Version must be >= 5 to look at the new memalign field.
+ // Version must be >= 5 to look at the new memalign field.
+ if (zone->version < 5) {
goto out;
}
if (malloc_check_start) {
@@ -1969,12 +2563,16 @@
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.
+ // excludes 0 == alignment
+ // relies on sizeof(void *) being a power of two.
+ if (alignment < sizeof(void *) ||
+ 0 != (alignment & (alignment - 1))) {
err = EINVAL;
goto out;
}
- if ((mzo & MZ_C11) && (size & (alignment - 1)) != 0) { /* C11 requires size to be a multiple of alignment */
+ // C11 aligned_alloc requires size to be a multiple of alignment, but
+ // posix_memalign does not
+ if ((mzo & MZ_C11) && (size & (alignment - 1)) != 0) {
err = EINVAL;
goto out;
}
@@ -1985,16 +2583,25 @@
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);
+ 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);
+ 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 MALLOC_TARGET_64BIT
+ if (clear_type) {
+ malloc_set_tsd_type_descriptor(MALLOC_TYPE_DESCRIPTOR_NONE);
+ }
+#endif // MALLOC_TARGET_64BIT
+
if (os_unlikely(ptr == NULL)) {
if (mzo & MZ_POSIX) {
malloc_set_errno_fast(mzo, err);
@@ -2003,10 +2610,12 @@
return ptr;
}
+MALLOC_NOINLINE
void *
malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
{
- return _malloc_zone_memalign(zone, alignment, size, MZ_NONE);
+ return _malloc_zone_memalign(zone, alignment, size, MZ_NONE,
+ malloc_callsite_fallback_type_descriptor());
}
boolean_t
@@ -2095,9 +2704,13 @@
void
malloc_set_zone_name(malloc_zone_t *z, const char *name)
{
- mprotect(z, sizeof(malloc_zone_t), PROT_READ | PROT_WRITE);
+ // TODO: save and restore permissions generally
+ bool mprotect_zone = true;
+ if (mprotect_zone) {
+ mprotect(z, sizeof(malloc_zone_t), PROT_READ | PROT_WRITE);
+ }
if (z->zone_name) {
- malloc_zone_t *old_zone = find_registered_zone(z->zone_name, NULL, false);
+ 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);
}
@@ -2110,12 +2723,36 @@
} else {
char *name_copy = _malloc_zone_malloc(z, buflen, MZ_NONE);
if (name_copy) {
- strlcpy(name_copy, name, buflen);
+ strcpy(name_copy, name);
z->zone_name = name_copy;
}
}
- }
- mprotect(z, sizeof(malloc_zone_t), PROT_READ);
+
+ malloc_zone_t *wrapped_zone = get_wrapped_zone(z);
+ if (wrapped_zone) {
+ // <name>-<wrapper_label>-<suffix>\0 // Wrapped zone name format
+ // ^ ^ ^ // 2 dashes and \0 -> +3
+ const char *wrapper_label = get_wrapper_zone_label(z);
+ const char *suffix = "Wrapped";
+ size_t buflen = strlen(name) + strlen(wrapper_label) + strlen(suffix) + 3;
+ char *wz_name = _malloc_zone_malloc(wrapped_zone, buflen, MZ_NONE);
+ if (wz_name) {
+ // snprintf() may allocate (not safe to use from libmalloc) and
+ // _simple_sprintf()/_simple_salloc() call vm_allocate() which is
+ // undesirable for such a simple API as malloc_set_zone_name()
+ strcpy(wz_name, name);
+ strcat(wz_name, "-");
+ strcat(wz_name, wrapper_label);
+ strcat(wz_name, "-");
+ strcat(wz_name, suffix);
+ malloc_set_zone_name(wrapped_zone, wz_name);
+ malloc_zone_free(wrapped_zone, wz_name);
+ }
+ }
+ }
+ if (mprotect_zone) {
+ mprotect(z, sizeof(malloc_zone_t), PROT_READ);
+ }
}
const char *
@@ -2133,7 +2770,7 @@
return;
}
- zone = find_registered_zone(ptr, &size, known_non_default);
+ 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))) {
@@ -2151,52 +2788,65 @@
/********* Generic ANSI callouts ************/
+MALLOC_NOINLINE
void *
malloc(size_t size)
{
return _malloc_zone_malloc(default_zone, size, MZ_POSIX);
}
+MALLOC_NOINLINE
void *
aligned_alloc(size_t alignment, size_t size)
{
return _malloc_zone_memalign(default_zone, alignment, size,
- MZ_POSIX | MZ_C11);
-}
-
+ MZ_POSIX | MZ_C11, malloc_callsite_fallback_type_descriptor());
+}
+
+MALLOC_NOINLINE
void *
calloc(size_t num_items, size_t size)
{
return _malloc_zone_calloc(default_zone, num_items, size, MZ_POSIX);
}
+// We have this function so code within libmalloc can call it without going
+// through the (potentially interposed) dyld symbol stub
+void
+_free(void *ptr)
+{
+ if (!ptr) {
+ return;
+ }
+
+ malloc_zone_t *zone0 = malloc_zones[0];
+ if (os_unlikely(malloc_slowpath ||
+ malloc_logger ||
+ zone0->version < 13)) {
+ find_zone_and_free(ptr, false);
+ return;
+ }
+
+ if (zone0->try_free_default) {
+ zone0->try_free_default(zone0, ptr);
+ } else {
+ find_zone_and_free(ptr, false);
+ }
+}
+
+MALLOC_NOINLINE
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);
-}
-
+ return _free(ptr);
+}
+
+// We have this function so code within libmalloc can call it without going
+// through the (potentially interposed) dyld symbol stub
void *
-realloc(void *in_ptr, size_t new_size)
+_realloc(void *in_ptr, size_t new_size)
{
void *retval = NULL;
- void *old_ptr;
malloc_zone_t *zone;
// SUSv3: "If size is 0 and ptr is not a null pointer, the object
@@ -2207,30 +2857,68 @@
// malloc_zone_malloc with zero size, which matches "If ptr is a null
// pointer, realloc() shall be equivalent to malloc() for the specified
// size." So we only free the original memory if the allocation succeeds.
- old_ptr = (new_size == 0) ? NULL : in_ptr;
- if (!old_ptr) {
- retval = malloc_zone_malloc(default_zone, new_size);
+ //
+ // When in_ptr is NULL, we want to ensure that the fallback type descriptor
+ // is good. We can ensure that by tail-calling from here, so that the
+ // callsite information is accurate.
+ //
+ // We don't really care about the quality of the type descriptor
+ // for the new_size == 0 allocation, so it's fine for it to always be based
+ // on the callsite in this function.
+ //
+ // Note: the fact that we allocate from the default zone in the
+ // new_size == 0 case regardless of the zone in_ptr belongs to is arguably a
+ // bug.
+ if (!in_ptr) {
+ return _malloc_zone_malloc(default_zone, new_size, MZ_POSIX);
+ } else if (new_size == 0) {
+ retval = _malloc_zone_malloc(default_zone, new_size, MZ_NONE);
} else {
- zone = find_registered_zone(old_ptr, NULL, false);
+ zone = _find_registered_zone(in_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)) {
+ const int abort_flags =
+ (MALLOC_ABORT_ON_CORRUPTION | MALLOC_ABORT_ON_ERROR);
+ if (malloc_debug_flags & abort_flags) {
flags = MALLOC_REPORT_CRASH | MALLOC_REPORT_NOLOG;
}
- malloc_report(flags, "*** error for object %p: pointer being realloc'd was not allocated\n", in_ptr);
+ 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);
+ retval = _malloc_zone_realloc(zone, in_ptr, new_size,
+ malloc_callsite_fallback_type_descriptor());
}
}
if (retval == NULL) {
malloc_set_errno_fast(MZ_POSIX, ENOMEM);
} else if (new_size == 0) {
+ _free(in_ptr);
+ }
+ return retval;
+}
+
+MALLOC_NOINLINE
+void *
+realloc(void *in_ptr, size_t new_size)
+{
+ return _realloc(in_ptr, new_size);
+}
+
+MALLOC_NOINLINE
+void *
+reallocf(void *in_ptr, size_t new_size)
+{
+ void *ptr = realloc(in_ptr, new_size);
+
+ if (!ptr && in_ptr && new_size != 0) {
free(in_ptr);
}
- return retval;
-}
-
+
+ return ptr;
+}
+
+MALLOC_NOINLINE
void *
valloc(size_t size)
{
@@ -2240,7 +2928,7 @@
extern void
vfree(void *ptr)
{
- free(ptr);
+ _free(ptr);
}
size_t
@@ -2252,7 +2940,7 @@
return size;
}
- (void)find_registered_zone(ptr, &size, false);
+ (void)_find_registered_zone(ptr, &size, false);
return size;
}
@@ -2279,14 +2967,17 @@
* There is insufficient memory available with the requested alignment.
*/
+// We have this function so code within libmalloc can call it without going
+// through the (potentially interposed) dyld symbol stub
int
-posix_memalign(void **memptr, size_t alignment, size_t size)
+_posix_memalign(void **memptr, size_t alignment, size_t size)
{
void *retval;
/* POSIX is silent on NULL == memptr !?! */
- retval = malloc_zone_memalign(default_zone, alignment, size);
+ retval = _malloc_zone_memalign(default_zone, alignment, size, MZ_NONE,
+ malloc_callsite_fallback_type_descriptor());
if (retval == NULL) {
// To avoid testing the alignment constraints redundantly, we'll rely on the
// test made in malloc_zone_memalign to vet each request. Only if that test fails
@@ -2303,6 +2994,13 @@
}
}
+MALLOC_NOINLINE
+int
+posix_memalign(void **memptr, size_t alignment, size_t size)
+{
+ return _posix_memalign(memptr, alignment, size);
+}
+
boolean_t
malloc_claimed_address(void *ptr)
{
@@ -2364,6 +3062,137 @@
return reallocf(in_ptr, alloc_size);
}
+void *
+_malloc_zone_malloc_with_options_np_outlined(malloc_zone_t *zone, size_t align,
+ size_t size, malloc_options_np_t options)
+{
+ void *ptr = NULL;
+
+ if (zone == NULL || zone == default_zone) {
+ zone = runtime_default_zone();
+ }
+
+#if MALLOC_TARGET_64BIT
+ uint64_t type_id = malloc_get_tsd_type_id();
+ bool clear_type = false;
+ if (!type_id) {
+ malloc_type_descriptor_t fallback =
+ malloc_callsite_fallback_type_descriptor();
+ malloc_set_tsd_type_descriptor(fallback);
+ type_id = fallback.type_id;
+ clear_type = true;
+ }
+#endif // MALLOC_TARGET_64BIT
+
+ if (malloc_interposition_compat || (zone->version < 15) ||
+ !zone->malloc_with_options) {
+ // There's no reasonable way to have the fallback callsite type
+ // descriptor work here. That's okay, as it's uncommon and SPI, so its
+ // callers should be built with TMO.
+ if (align) {
+ ptr = malloc_zone_memalign(zone, align, size);
+ if (ptr && (options & MALLOC_NP_OPTION_CLEAR)) {
+ memset(ptr, 0, size);
+ }
+ } else if (options & MALLOC_NP_OPTION_CLEAR) {
+ ptr = malloc_zone_calloc(zone, 1, size);
+ } else {
+ ptr = malloc_zone_malloc(zone, size);
+ }
+ } else {
+ MALLOC_TRACE(TRACE_malloc_options | DBG_FUNC_START, (uintptr_t)zone,
+ align, size, 0);
+ ptr = zone->malloc_with_options(zone, align, size, options);
+
+ if (os_unlikely(malloc_logger)) {
+ uint32_t flags = MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE;
+ if (options & MALLOC_NP_OPTION_CLEAR) {
+ flags |= MALLOC_LOG_TYPE_CLEARED;
+ }
+ malloc_logger(flags, (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_with_options (%p/%llu,%llu): ", ptr,
+ (unsigned long long)align, (unsigned long long)size);
+ }
+ MALLOC_TRACE(TRACE_malloc_options | DBG_FUNC_END,
+ (uintptr_t)zone, align, size, (uintptr_t)ptr);
+ }
+
+#if MALLOC_TARGET_64BIT
+ if (clear_type) {
+ malloc_set_tsd_type_descriptor(MALLOC_TYPE_DESCRIPTOR_NONE);
+ }
+#endif
+
+ return ptr;
+}
+
+void *
+malloc_zone_malloc_with_options_np(malloc_zone_t *zone, size_t align,
+ size_t size, malloc_options_np_t options)
+{
+ if (os_unlikely((align != 0) && (!powerof2(align) ||
+ ((size & (align-1)) != 0)))) { // equivalent to (size % align != 0)
+ return NULL;
+ }
+
+ if (os_unlikely(malloc_logger || malloc_slowpath)) {
+ return _malloc_zone_malloc_with_options_np_outlined(zone, align, size,
+ options);
+ }
+
+ if (zone == NULL || zone == default_zone) {
+ zone = malloc_zones[0];
+ }
+
+ if (zone->version >= 16 && zone->malloc_type_malloc_with_options) {
+ return zone->malloc_type_malloc_with_options(zone, align, size,
+ options, malloc_callsite_fallback_type_id());
+ }
+
+ return _malloc_zone_malloc_with_options_np_outlined(zone, align, size,
+ options);
+}
+
+/********* Purgeable zone ************/
+
+static void
+_malloc_create_purgeable_zone(void * __unused ctx)
+{
+
+ //
+ // 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.
+ //
+ if (!initial_scalable_zone) {
+ // If the process didn't initially create a scalable zone because xzone
+ // malloc is enabled, we should create one now.
+ //
+ // TODO: xzone-backed purgeable zone
+ initial_scalable_zone = create_scalable_zone(0, malloc_debug_flags);
+ malloc_set_zone_name(initial_scalable_zone,
+ DEFAULT_SCALABLE_ZONE_STRING);
+ malloc_zone_register(initial_scalable_zone);
+ }
+
+ default_purgeable_zone = create_purgeable_zone(0, initial_scalable_zone,
+ malloc_debug_flags);
+ malloc_zone_register(default_purgeable_zone);
+ malloc_set_zone_name(default_purgeable_zone,
+ DEFAULT_PUREGEABLE_ZONE_STRING);
+}
+
+malloc_zone_t *
+malloc_default_purgeable_zone(void)
+{
+ static os_once_t pred;
+ os_once(&pred, NULL, _malloc_create_purgeable_zone);
+ return default_purgeable_zone;
+}
+
static malloc_zone_t *
find_registered_purgeable_zone(void *ptr)
{
@@ -2378,7 +3207,7 @@
* and only search those.
*/
size_t size = 0;
- malloc_zone_t *zone = find_registered_zone(ptr, &size, false);
+ 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. */
@@ -2427,32 +3256,34 @@
return 0;
}
+/********* Memory events ************/
+
void
malloc_enter_process_memory_limit_warn_mode(void)
{
// <rdar://problem/25063714>
}
-
-
// Note that malloc_memory_event_handler is not thread-safe, and we are relying on the callers of this for synchronization
void
malloc_memory_event_handler(unsigned long event)
{
- if (event & NOTE_MEMORYSTATUS_PRESSURE_WARN) {
+#if CONFIG_MADVISE_PRESSURE_RELIEF || (CONFIG_LARGE_CACHE && !CONFIG_DEFERRED_RECLAIM)
+ if (event & MALLOC_MEMORYSTATUS_MASK_PRESSURE_RELIEF) {
malloc_zone_pressure_relief(0, 0);
}
+#endif /* CONFIG_MADVISE_PRESSURE_RELIEF || (CONFIG_LARGE_CACHE && !CONFIG_DEFERRED_RECLAIM) */
if ((event & NOTE_MEMORYSTATUS_MSL_STATUS) != 0 && (event & ~NOTE_MEMORYSTATUS_MSL_STATUS) == 0) {
malloc_register_stack_logger();
}
#if ENABLE_MEMORY_RESOURCE_EXCEPTION_HANDLING
- if (event & (NOTE_MEMORYSTATUS_PROC_LIMIT_WARN | NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL | NOTE_MEMORYSTATUS_PRESSURE_CRITICAL)) {
+ if (event & MALLOC_MEMORYSTATUS_MASK_RESOURCE_EXCEPTION_HANDLING) {
malloc_register_stack_logger();
}
-#endif // ENABLE_MEMORY_RESOURCE_EXCEPTION_HANDLING
-
+#endif /* ENABLE_MEMORY_RESOURCE_EXCEPTION_HANDLING */
+
if (msl.handle_memory_event) {
// Let MSL see the event.
msl.handle_memory_event(event);
@@ -2549,6 +3380,85 @@
}
}
+/********* Functions for sanitization ************/
+
+#if TARGET_OS_OSX
+
+// Shadow memory helpers
+#define SHADOW_MEMORY_BASE (0x0000200000000000ull)
+#define SHADOW_GRANULARITY_BITS 3u
+#define SHADOW_GRANULARITY (1u << SHADOW_GRANULARITY_BITS)
+#define PTR_TO_SHADOW(p) (void *)((((uintptr_t)ptr) >> SHADOW_GRANULARITY_BITS) + SHADOW_MEMORY_BASE)
+#define SIZE_TO_SHADOW_SIZE(p) ((p) >> SHADOW_GRANULARITY_BITS)
+#define SHADOW_POISON_HEAP_LEFT_RZ 0xfa
+#define SHADOW_POISON_HEAP_RIGHT_RZ 0xfb
+#define SHADOW_POISON_HEAP_FREED 0xfd
+
+static void
+malloc_sanitizer_fallback_allocate_poison(uintptr_t ptr, size_t leftrz_sz, size_t alloc_sz, size_t rightrz_sz)
+{
+ uintptr_t alloc_ptr, rightrz_ptr;
+ MALLOC_ASSERT(!os_add_overflow(ptr, leftrz_sz, &alloc_ptr) &&
+ !os_add_overflow(alloc_ptr, alloc_sz, &rightrz_ptr));
+
+ // Tag the ASan shadow as ASAN_POISON_USER/ASAN_VALID/ASAN_POISON_USER
+ if (sanitizer_fallback_ptrs.memory_poison && sanitizer_fallback_ptrs.memory_unpoison) {
+ (*sanitizer_fallback_ptrs.memory_poison)(ptr, leftrz_sz);
+ (*sanitizer_fallback_ptrs.memory_unpoison)(alloc_ptr, alloc_sz);
+ (*sanitizer_fallback_ptrs.memory_poison)(rightrz_ptr, rightrz_sz);
+ } else {
+ // This code should only be executed by Rosetta on macOS
+ MALLOC_ASSERT(!(leftrz_sz % SHADOW_GRANULARITY) &&
+ !((alloc_sz + rightrz_sz) % SHADOW_GRANULARITY));
+
+ const uint8_t partial = alloc_sz & (SHADOW_GRANULARITY - 1);
+ // Partial poison is not supported, leave it unpoisoned
+ const size_t left = SIZE_TO_SHADOW_SIZE(leftrz_sz),
+ right = SIZE_TO_SHADOW_SIZE(rightrz_sz),
+ alloc = SIZE_TO_SHADOW_SIZE(alloc_sz) + !!partial;
+ uint8_t *shadow = PTR_TO_SHADOW(ptr);
+ memset(shadow, SHADOW_POISON_HEAP_LEFT_RZ, left);
+ shadow += left;
+ bzero(shadow + left, alloc);
+ shadow += alloc;
+ memset(shadow, SHADOW_POISON_HEAP_RIGHT_RZ, right);
+ }
+}
+
+static void
+malloc_sanitizer_fallback_deallocate_poison(uintptr_t ptr, size_t sz)
+{
+ // Tag the ASan shadow as ASAN_POISON_USER
+ if (sanitizer_fallback_ptrs.memory_poison) {
+ (*sanitizer_fallback_ptrs.memory_poison)(ptr, sz);
+ } else {
+ memset(PTR_TO_SHADOW(ptr), SHADOW_POISON_HEAP_FREED, SIZE_TO_SHADOW_SIZE(sz));
+ }
+}
+
+#endif // TARGET_OS_OSX
+
+bool malloc_sanitizer_is_enabled(void)
+{
+ return malloc_sanitizer_enabled;
+}
+
+const struct malloc_sanitizer_poison *
+malloc_sanitizer_get_functions(void)
+{
+#if TARGET_OS_OSX
+ return sanitizer ? sanitizer : &sanitizer_fallback;
+#else
+ return sanitizer;
+#endif
+}
+
+void
+malloc_sanitizer_set_functions(struct malloc_sanitizer_poison *s)
+{
+ sanitizer = s;
+}
+
/********* Functions for performance tools ************/
kern_return_t
@@ -2563,9 +3473,8 @@
vm_address_t *zones_address_ref;
unsigned num_zones;
unsigned *num_zones_ref;
- if (!reader) {
- reader = _malloc_default_reader;
- }
+ reader = reader_or_in_memory_fallback(reader, task);
+
// printf("Read malloc_zones at address %p should be %p\n", &malloc_zones, malloc_zones);
err = reader(task, remote_malloc_zones, sizeof(void *), (void **)&zones_address_ref);
// printf("Read malloc_zones[%p]=%p\n", remote_malloc_zones, *zones_address_ref);
@@ -2717,10 +3626,21 @@
{
unsigned index = 0;
MALLOC_LOCK();
+#if CONFIG_EARLY_MALLOC
+ mfm_lock();
+#endif
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_lock(zone);
}
+#if CONFIG_XZONE_MALLOC
+ // All of the xzone malloc zones share some global state, and that global
+ // state needs to be locked after all the zone specific state has been
+ // locked, to prevent deadlocks
+ if (initial_xzone_zone) {
+ xzm_force_lock_global_state(initial_xzone_zone);
+ }
+#endif // CONFIG_XZONE_MALLOC
if (callout) {
callout();
}
@@ -2729,6 +3649,11 @@
static void
_malloc_unlock_all(void (*callout)(void))
{
+#if CONFIG_XZONE_MALLOC
+ if (initial_xzone_zone) {
+ xzm_force_unlock_global_state(initial_xzone_zone);
+ }
+#endif // CONFIG_XZONE_MALLOC
unsigned index = 0;
if (callout) {
callout();
@@ -2737,12 +3662,20 @@
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_unlock(zone);
}
+#if CONFIG_EARLY_MALLOC
+ mfm_unlock();
+#endif
MALLOC_UNLOCK();
}
static void
_malloc_reinit_lock_all(void (*callout)(void))
{
+#if CONFIG_XZONE_MALLOC
+ if (initial_xzone_zone) {
+ xzm_force_reinit_lock_global_state(initial_xzone_zone);
+ }
+#endif // CONFIG_XZONE_MALLOC
unsigned index = 0;
if (callout) {
callout();
@@ -2755,6 +3688,9 @@
zone->introspect->reinit_lock(zone);
}
}
+#if CONFIG_EARLY_MALLOC
+ mfm_reinit_lock();
+#endif
MALLOC_REINIT_LOCK();
}
@@ -2781,7 +3717,7 @@
{
#if CONFIG_NANOZONE
if (_malloc_entropy_initialized) {
- if (_malloc_engaged_nano == NANO_V2) {
+ if (initial_nano_zone) {
nanov2_forked_zone((nanozonev2_t *)initial_nano_zone);
}
}
@@ -2886,7 +3822,21 @@
malloc_zero_policy = MALLOC_ZERO_NONE;
}
+bool
+malloc_variant_is_debug_4test(void)
+{
+#ifdef DEBUG
+ return true;
+#else
+ return false;
+#endif
+}
+
/***************** OBSOLETE ENTRY POINTS ********************/
+
+#ifndef PHASE_OUT_OLD_MALLOC
+#define PHASE_OUT_OLD_MALLOC 0
+#endif
#if PHASE_OUT_OLD_MALLOC
#error PHASE OUT THE FOLLOWING FUNCTIONS
@@ -2974,7 +3924,8 @@
if (0==strncmp(*e, "MallocStackLogging", 18)) {
_malloc_register_stack_logger(true);
if (msl.set_flags_from_environment) {
- msl.set_flags_from_environment(env);
+ // rdar://125495815 - re-fetch env, as it may have moved
+ msl.set_flags_from_environment((const char **)*_NSGetEnviron());
}
break;
}
@@ -2996,7 +3947,6 @@
if (!dylib) {
return;
}
- msld.dylib = dylib;
msl.handle_memory_event = _dlsym(dylib, "msl_handle_memory_event");
msl.stack_logging_locked = _dlsym(dylib, "msl_stack_logging_locked");
msl.fork_prepare = _dlsym(dylib, "msl_fork_prepare");
@@ -3007,13 +3957,6 @@
msl.set_flags_from_environment = _dlsym(dylib, "msl_set_flags_from_environment");
msl.initialize = _dlsym(dylib, "msl_initialize");
-
- // TODO delete these ones
- msld.get_frames_for_address = _dlsym(dylib, "msl_get_frames_for_address");
- msld.stackid_for_vm_region = _dlsym(dylib, "msl_stackid_for_vm_region");
- msld.get_frames_for_stackid = _dlsym(dylib, "msl_get_frames_for_stackid");
- msld.uniquing_table_read_stack = _dlsym(dylib, "msl_uniquing_table_read_stack");
-
void (*msl_copy_msl_lite_hooks) (struct _malloc_msl_lite_hooks_s *hooksp, size_t size);
msl_copy_msl_lite_hooks = _dlsym(dylib, "msl_copy_msl_lite_hooks");
if (msl_copy_msl_lite_hooks) {
@@ -3033,7 +3976,7 @@
_malloc_register_stack_logger(bool at_startup)
{
void *dylib = NULL;
- if (malloc_quarantine_enabled && !at_startup) {
+ if (malloc_sanitizer_enabled && !at_startup) {
return false;
}
#if !TARGET_OS_DRIVERKIT
@@ -3090,227 +4033,6 @@
}
}
-//deprecated
-kern_return_t
-__mach_stack_logging_start_reading(task_t task, vm_address_t shared_memory_address, boolean_t *uses_lite_mode)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return KERN_FAILURE;
- }
- kern_return_t (*f) (task_t task, vm_address_t shared_memory_address, boolean_t *uses_lite_mode);
- f = _dlsym(msld.dylib, "msl_start_reading");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task, shared_memory_address, uses_lite_mode);
-}
-
-
-//deprecated
-kern_return_t
-__mach_stack_logging_stop_reading(task_t task)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return KERN_FAILURE;
- }
- kern_return_t (*f) (task_t task);
- f = _dlsym(msld.dylib, "msl_stop_reading");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task);
-}
-
-kern_return_t
-__mach_stack_logging_get_frames(task_t task,
- mach_vm_address_t address,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count)
-{
- malloc_register_stack_logger();
- if (!msld.get_frames_for_address) {
- return KERN_FAILURE;
- }
- return msld.get_frames_for_address(task, address, stack_frames_buffer, max_stack_frames, count);
-}
-
-uint64_t
-__mach_stack_logging_stackid_for_vm_region(task_t task, mach_vm_address_t address)
-{
- malloc_register_stack_logger();
- if (!msld.stackid_for_vm_region) {
- return -1ull;
- }
- return msld.stackid_for_vm_region(task, address);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_frames_for_uniqued_stack(task_t task,
- uint64_t stack_identifier,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count)
-{
- malloc_register_stack_logger();
- if (!msld.get_frames_for_stackid) {
- return KERN_FAILURE;
- }
- return msld.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, NULL);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_get_frames_for_stackid(task_t task,
- uint64_t stack_identifier,
- mach_vm_address_t *stack_frames_buffer,
- uint32_t max_stack_frames,
- uint32_t *count,
- bool *last_frame_is_threadid)
-{
- malloc_register_stack_logger();
- if (!msld.get_frames_for_stackid) {
- return KERN_FAILURE;
- }
- return msld.get_frames_for_stackid(task, stack_identifier, stack_frames_buffer, max_stack_frames, count, last_frame_is_threadid);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_uniquing_table_read_stack(struct backtrace_uniquing_table *uniquing_table,
- uint64_t stackid,
- mach_vm_address_t *out_frames_buffer,
- uint32_t *out_frames_count,
- uint32_t max_frames)
-{
- malloc_register_stack_logger();
- if (!msld.uniquing_table_read_stack) {
- return KERN_FAILURE;
- }
- return msld.uniquing_table_read_stack(uniquing_table, stackid, out_frames_buffer, out_frames_count, max_frames);
-}
-
-//deprecated
-kern_return_t
-__mach_stack_logging_enumerate_records(task_t task,
- mach_vm_address_t address,
- void enumerator(mach_stack_logging_record_t, void *),
- void *context)
-{
- malloc_register_stack_logger();
- kern_return_t (*f) (task_t task,
- mach_vm_address_t address,
- void enumerator(mach_stack_logging_record_t, void *),
- void *context);
- if (!msld.dylib) {
- return KERN_FAILURE;
- }
- f = _dlsym(msld.dylib, "msl_disk_stack_logs_enumerate_from_task");
- if (!f) {
- return KERN_FAILURE;
- }
- return f(task, address, enumerator, context);
-}
-
-
-//deprecated
-struct backtrace_uniquing_table *
-__mach_stack_logging_copy_uniquing_table(task_t task)
-{
- malloc_register_stack_logger();
- struct backtrace_uniquing_table * (*f) (task_t task);
- if (!msld.dylib) {
- return NULL;
- }
- f = _dlsym(msld.dylib, "msl_uniquing_table_copy_from_task");
- if (!f) {
- return NULL;
- }
- return f(task);
-}
-
-//deprecated
-struct backtrace_uniquing_table *
-__mach_stack_logging_uniquing_table_copy_from_serialized(void *buffer, size_t size)
-{
- malloc_register_stack_logger();
- struct backtrace_uniquing_table * (*f) (void *buffer, size_t size);
- if (!msld.dylib) {
- return NULL;
- }
- f = _dlsym(msld.dylib, "msl_uniquing_table_copy_from_serialized");
- if (!f) {
- return NULL;
- }
- return f(buffer, size);
-}
-
-//deprecated
-void
-__mach_stack_logging_uniquing_table_release(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return;
- }
- void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msld.dylib, "msl_uniquing_table_release");
- if (f) {
- f(table);
- }
-}
-
-//deprecated
-void
-__mach_stack_logging_uniquing_table_retain(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return;
- }
- void (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msld.dylib, "msl_uniquing_table_retain");
- if (f) {
- f(table);
- }
-}
-
-//deprecated
-extern
-size_t
-__mach_stack_logging_uniquing_table_sizeof(struct backtrace_uniquing_table *table)
-{
- malloc_register_stack_logger();
- size_t (*f) (struct backtrace_uniquing_table *table);
- f = _dlsym(msld.dylib, "msl_uniquing_table_retain");
- return f(table);
-}
-
-//deprecated
-void *
-__mach_stack_logging_uniquing_table_serialize(struct backtrace_uniquing_table *table, mach_vm_size_t *size)
-{
- malloc_register_stack_logger();
- if (!msld.dylib) {
- return NULL;
- }
- void * (*f) (struct backtrace_uniquing_table *table, mach_vm_size_t *size);
- f = _dlsym(msld.dylib, "msl_uniquing_table_serialize");
- if (!f) {
- return NULL;
- }
- return f(table, size);
-}
-
-kern_return_t
-__mach_stack_logging_set_file_path(task_t task, char* file_path)
-{
- return KERN_SUCCESS;
-}
-
/* WeChat references this, only god knows why. This symbol does nothing. */
int stack_logging_enable_logging = 0;