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usr / src / contrib / llvm-project / compiler-rt / lib / sanitizer_common /

📁 ..
📄 sancov_flags.cpp(1.64 KB)
📄 sancov_flags.h(1.08 KB)
📄 sancov_flags.inc(777 B)
📄 sanitizer_addrhashmap.h(9.19 KB)
📄 sanitizer_allocator.cpp(8.73 KB)
📄 sanitizer_allocator.h(2.69 KB)
📄 sanitizer_allocator_bytemap.h(3.12 KB)
📄 sanitizer_allocator_checks.cpp(686 B)
📄 sanitizer_allocator_checks.h(2.67 KB)
📄 sanitizer_allocator_combined.h(6.29 KB)
📄 sanitizer_allocator_interface.h(1.83 KB)
📄 sanitizer_allocator_internal.h(2.03 KB)
📄 sanitizer_allocator_local_cache.h(8.95 KB)
📄 sanitizer_allocator_primary32.h(12.64 KB)
📄 sanitizer_allocator_primary64.h(32.71 KB)
📄 sanitizer_allocator_report.cpp(4.68 KB)
📄 sanitizer_allocator_report.h(1.72 KB)
📄 sanitizer_allocator_secondary.h(10.78 KB)
📄 sanitizer_allocator_size_class_map.h(10.12 KB)
📄 sanitizer_allocator_stats.h(2.76 KB)
📄 sanitizer_asm.h(2.57 KB)
📄 sanitizer_atomic.h(1.97 KB)
📄 sanitizer_atomic_clang.h(3.42 KB)
📄 sanitizer_atomic_clang_mips.h(3.77 KB)
📄 sanitizer_atomic_clang_other.h(3.02 KB)
📄 sanitizer_atomic_clang_x86.h(3.77 KB)
📄 sanitizer_atomic_msvc.h(8.53 KB)
📄 sanitizer_bitvector.h(9.43 KB)
📄 sanitizer_bvgraph.h(4.62 KB)
📄 sanitizer_common.cpp(10.13 KB)
📄 sanitizer_common.h(30.64 KB)
📄 sanitizer_common_interceptors.inc(348.66 KB)
📄 sanitizer_common_interceptors_format.inc(16.84 KB)
📄 sanitizer_common_interceptors_ioctl.inc(22.13 KB)
📄 sanitizer_common_interceptors_netbsd_compat.inc(4.07 KB)
📄 sanitizer_common_interceptors_vfork_aarch64.inc.S(1.23 KB)
📄 sanitizer_common_interceptors_vfork_arm.inc.S(1.24 KB)
📄 sanitizer_common_interceptors_vfork_i386.inc.S(1.66 KB)
📄 sanitizer_common_interceptors_vfork_x86_64.inc.S(1.03 KB)
📄 sanitizer_common_interface.inc(2.05 KB)
📄 sanitizer_common_interface_posix.inc(732 B)
📄 sanitizer_common_libcdep.cpp(5.4 KB)
📄 sanitizer_common_nolibc.cpp(1.12 KB)
📄 sanitizer_common_syscalls.inc(85 KB)
📄 sanitizer_coverage_fuchsia.cpp(10.1 KB)
📄 sanitizer_coverage_interface.inc(1.73 KB)
📄 sanitizer_coverage_libcdep_new.cpp(7.39 KB)
📄 sanitizer_coverage_win_dll_thunk.cpp(1.03 KB)
📄 sanitizer_coverage_win_dynamic_runtime_thunk.cpp(1.16 KB)
📄 sanitizer_coverage_win_sections.cpp(3.36 KB)
📄 sanitizer_coverage_win_weak_interception.cpp(1.17 KB)
📄 sanitizer_dbghelp.h(1.44 KB)
📄 sanitizer_deadlock_detector.h(13.28 KB)
📄 sanitizer_deadlock_detector1.cpp(5.6 KB)
📄 sanitizer_deadlock_detector2.cpp(10.84 KB)
📄 sanitizer_deadlock_detector_interface.h(2.66 KB)
📄 sanitizer_errno.cpp(1.09 KB)
📄 sanitizer_errno.h(1.3 KB)
📄 sanitizer_errno_codes.h(1.1 KB)
📄 sanitizer_file.cpp(6.24 KB)
📄 sanitizer_file.h(3.67 KB)
📄 sanitizer_flag_parser.cpp(5.55 KB)
📄 sanitizer_flag_parser.h(5.71 KB)
📄 sanitizer_flags.cpp(3.95 KB)
📄 sanitizer_flags.h(2.13 KB)
📄 sanitizer_flags.inc(12.73 KB)
📄 sanitizer_freebsd.h(3.31 KB)
📄 sanitizer_fuchsia.cpp(16.58 KB)
📄 sanitizer_fuchsia.h(1.03 KB)
📄 sanitizer_getauxval.h(1.73 KB)
📄 sanitizer_glibc_version.h(748 B)
📄 sanitizer_hash.h(1.04 KB)
📄 sanitizer_interceptors_ioctl_netbsd.inc(68.81 KB)
📄 sanitizer_interface_internal.h(5.28 KB)
📄 sanitizer_internal_defs.h(14.28 KB)
📄 sanitizer_lfstack.h(2.08 KB)
📄 sanitizer_libc.cpp(7.21 KB)
📄 sanitizer_libc.h(3.23 KB)
📄 sanitizer_libignore.cpp(4.24 KB)
📄 sanitizer_libignore.h(3.5 KB)
📄 sanitizer_linux.cpp(71.58 KB)
📄 sanitizer_linux.h(5.47 KB)
📄 sanitizer_linux_libcdep.cpp(25.67 KB)
📄 sanitizer_linux_s390.cpp(6.91 KB)
📄 sanitizer_list.h(3.81 KB)
📄 sanitizer_local_address_space_view.h(3.67 KB)
📄 sanitizer_mac.cpp(38.67 KB)
📄 sanitizer_mac.h(2.49 KB)
📄 sanitizer_mac_libcdep.cpp(968 B)
📄 sanitizer_malloc_mac.inc(13.06 KB)
📄 sanitizer_mutex.h(5.17 KB)
📄 sanitizer_netbsd.cpp(9.95 KB)
📄 sanitizer_openbsd.cpp(3.17 KB)
📄 sanitizer_persistent_allocator.cpp(687 B)
📄 sanitizer_persistent_allocator.h(2.31 KB)
📄 sanitizer_placement_new.h(885 B)
📄 sanitizer_platform.h(10.11 KB)
📄 sanitizer_platform_interceptors.h(24.93 KB)
📄 sanitizer_platform_limits_freebsd.cpp(19.79 KB)
📄 sanitizer_platform_limits_freebsd.h(18.41 KB)
📄 sanitizer_platform_limits_linux.cpp(3.32 KB)
📄 sanitizer_platform_limits_netbsd.cpp(109.73 KB)
📄 sanitizer_platform_limits_netbsd.h(81.54 KB)
📄 sanitizer_platform_limits_openbsd.cpp(8.69 KB)
📄 sanitizer_platform_limits_openbsd.h(8.68 KB)
📄 sanitizer_platform_limits_posix.cpp(48.89 KB)
📄 sanitizer_platform_limits_posix.h(40.65 KB)
📄 sanitizer_platform_limits_solaris.cpp(11.93 KB)
📄 sanitizer_platform_limits_solaris.h(12.26 KB)
📄 sanitizer_posix.cpp(11.93 KB)
📄 sanitizer_posix.h(5.14 KB)
📄 sanitizer_posix_libcdep.cpp(16.21 KB)
📄 sanitizer_printf.cpp(12.07 KB)
📄 sanitizer_procmaps.h(2.93 KB)
📄 sanitizer_procmaps_bsd.cpp(3.81 KB)
📄 sanitizer_procmaps_common.cpp(5.27 KB)
📄 sanitizer_procmaps_fuchsia.cpp(2.51 KB)
📄 sanitizer_procmaps_linux.cpp(2.9 KB)
📄 sanitizer_procmaps_mac.cpp(13.7 KB)
📄 sanitizer_procmaps_solaris.cpp(2.18 KB)
📄 sanitizer_ptrauth.h(720 B)
📄 sanitizer_quarantine.h(9.57 KB)
📄 sanitizer_report_decorator.h(1.89 KB)
📄 sanitizer_ring_buffer.h(4.7 KB)
📄 sanitizer_rtems.cpp(7.61 KB)
📄 sanitizer_rtems.h(772 B)
📄 sanitizer_signal_interceptors.inc(2.89 KB)
📄 sanitizer_solaris.cpp(6.6 KB)
📄 sanitizer_stackdepot.cpp(4.54 KB)
📄 sanitizer_stackdepot.h(2.13 KB)
📄 sanitizer_stackdepotbase.h(5.58 KB)
📄 sanitizer_stacktrace.cpp(4.58 KB)
📄 sanitizer_stacktrace.h(5.65 KB)
📄 sanitizer_stacktrace_libcdep.cpp(5.54 KB)
📄 sanitizer_stacktrace_printer.cpp(9.08 KB)
📄 sanitizer_stacktrace_printer.h(3.08 KB)
📄 sanitizer_stacktrace_sparc.cpp(3.05 KB)
📄 sanitizer_stoptheworld.h(2.34 KB)
📄 sanitizer_stoptheworld_fuchsia.cpp(1.28 KB)
📄 sanitizer_stoptheworld_linux_libcdep.cpp(20.8 KB)
📄 sanitizer_stoptheworld_mac.cpp(5.29 KB)
📄 sanitizer_stoptheworld_netbsd_libcdep.cpp(11.02 KB)
📄 sanitizer_suppressions.cpp(5.67 KB)
📄 sanitizer_suppressions.h(1.69 KB)
📄 sanitizer_symbolizer.cpp(3.65 KB)
📄 sanitizer_symbolizer.h(6.62 KB)
📄 sanitizer_symbolizer_fuchsia.h(1.56 KB)
📄 sanitizer_symbolizer_internal.h(5.8 KB)
📄 sanitizer_symbolizer_libbacktrace.cpp(6.1 KB)
📄 sanitizer_symbolizer_libbacktrace.h(1.49 KB)
📄 sanitizer_symbolizer_libcdep.cpp(17.45 KB)
📄 sanitizer_symbolizer_mac.cpp(8.48 KB)
📄 sanitizer_symbolizer_mac.h(1.37 KB)
📄 sanitizer_symbolizer_markup.cpp(5.39 KB)
📄 sanitizer_symbolizer_posix_libcdep.cpp(16.5 KB)
📄 sanitizer_symbolizer_report.cpp(10.01 KB)
📄 sanitizer_symbolizer_rtems.h(1.56 KB)
📄 sanitizer_symbolizer_win.cpp(11.59 KB)
📄 sanitizer_syscall_generic.inc(1.06 KB)
📄 sanitizer_syscall_linux_aarch64.inc(4.58 KB)
📄 sanitizer_syscall_linux_arm.inc(4.58 KB)
📄 sanitizer_syscall_linux_x86_64.inc(3.07 KB)
📄 sanitizer_syscalls_netbsd.inc(120.97 KB)
📄 sanitizer_termination.cpp(2.86 KB)
📄 sanitizer_thread_registry.cpp(10.31 KB)
📄 sanitizer_thread_registry.h(5.44 KB)
📄 sanitizer_tls_get_addr.cpp(5.29 KB)
📄 sanitizer_tls_get_addr.h(2.21 KB)
📄 sanitizer_type_traits.cpp(708 B)
📄 sanitizer_type_traits.h(1.49 KB)
📄 sanitizer_unwind_linux_libcdep.cpp(6.13 KB)
📄 sanitizer_unwind_win.cpp(2.41 KB)
📄 sanitizer_vector.h(2.57 KB)
📄 sanitizer_win.cpp(33.3 KB)
📄 sanitizer_win.h(851 B)
📄 sanitizer_win_defs.h(7.23 KB)
📄 sanitizer_win_dll_thunk.cpp(3.41 KB)
📄 sanitizer_win_dll_thunk.h(11.13 KB)
📄 sanitizer_win_dynamic_runtime_thunk.cpp(1.16 KB)
📄 sanitizer_win_weak_interception.cpp(3.49 KB)
📄 sanitizer_win_weak_interception.h(1.64 KB)
📁 symbolizer
📄 weak_symbols.txt(230 B)

Editing: sanitizer_allocator.cpp

//===-- sanitizer_allocator.cpp -------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries.
// This allocator is used inside run-times.
//===----------------------------------------------------------------------===//

#include "sanitizer_allocator.h"

#include "sanitizer_allocator_checks.h"
#include "sanitizer_allocator_internal.h"
#include "sanitizer_atomic.h"
#include "sanitizer_common.h"

namespace __sanitizer {

// Default allocator names.
const char *PrimaryAllocatorName = "SizeClassAllocator";
const char *SecondaryAllocatorName = "LargeMmapAllocator";

// ThreadSanitizer for Go uses libc malloc/free.
#if defined(SANITIZER_USE_MALLOC)
# if SANITIZER_LINUX && !SANITIZER_ANDROID
extern "C" void *__libc_malloc(uptr size);
#  if !SANITIZER_GO
extern "C" void *__libc_memalign(uptr alignment, uptr size);
#  endif
extern "C" void *__libc_realloc(void *ptr, uptr size);
extern "C" void __libc_free(void *ptr);
# else
#  include <stdlib.h>
#  define __libc_malloc malloc
#  if !SANITIZER_GO
static void *__libc_memalign(uptr alignment, uptr size) {
  void *p;
  uptr error = posix_memalign(&p, alignment, size);
  if (error) return nullptr;
  return p;
}
#  endif
#  define __libc_realloc realloc
#  define __libc_free free
# endif

static void *RawInternalAlloc(uptr size, InternalAllocatorCache *cache,
                              uptr alignment) {
  (void)cache;
#if !SANITIZER_GO
  if (alignment == 0)
    return __libc_malloc(size);
  else
    return __libc_memalign(alignment, size);
#else
  // Windows does not provide __libc_memalign/posix_memalign. It provides
  // __aligned_malloc, but the allocated blocks can't be passed to free,
  // they need to be passed to __aligned_free. InternalAlloc interface does
  // not account for such requirement. Alignemnt does not seem to be used
  // anywhere in runtime, so just call __libc_malloc for now.
  DCHECK_EQ(alignment, 0);
  return __libc_malloc(size);
#endif
}

static void *RawInternalRealloc(void *ptr, uptr size,
                                InternalAllocatorCache *cache) {
  (void)cache;
  return __libc_realloc(ptr, size);
}

static void RawInternalFree(void *ptr, InternalAllocatorCache *cache) {
  (void)cache;
  __libc_free(ptr);
}

InternalAllocator *internal_allocator() {
  return 0;
}

#else  // SANITIZER_GO || defined(SANITIZER_USE_MALLOC)

static ALIGNED(64) char internal_alloc_placeholder[sizeof(InternalAllocator)];
static atomic_uint8_t internal_allocator_initialized;
static StaticSpinMutex internal_alloc_init_mu;

static InternalAllocatorCache internal_allocator_cache;
static StaticSpinMutex internal_allocator_cache_mu;

InternalAllocator *internal_allocator() {
  InternalAllocator *internal_allocator_instance =
      reinterpret_cast<InternalAllocator *>(&internal_alloc_placeholder);
  if (atomic_load(&internal_allocator_initialized, memory_order_acquire) == 0) {
    SpinMutexLock l(&internal_alloc_init_mu);
    if (atomic_load(&internal_allocator_initialized, memory_order_relaxed) ==
        0) {
      internal_allocator_instance->Init(kReleaseToOSIntervalNever);
      atomic_store(&internal_allocator_initialized, 1, memory_order_release);
    }
  }
  return internal_allocator_instance;
}

static void *RawInternalAlloc(uptr size, InternalAllocatorCache *cache,
                              uptr alignment) {
  if (alignment == 0) alignment = 8;
  if (cache == 0) {
    SpinMutexLock l(&internal_allocator_cache_mu);
    return internal_allocator()->Allocate(&internal_allocator_cache, size,
                                          alignment);
  }
  return internal_allocator()->Allocate(cache, size, alignment);
}

static void *RawInternalRealloc(void *ptr, uptr size,
                                InternalAllocatorCache *cache) {
  uptr alignment = 8;
  if (cache == 0) {
    SpinMutexLock l(&internal_allocator_cache_mu);
    return internal_allocator()->Reallocate(&internal_allocator_cache, ptr,
                                            size, alignment);
  }
  return internal_allocator()->Reallocate(cache, ptr, size, alignment);
}

static void RawInternalFree(void *ptr, InternalAllocatorCache *cache) {
  if (!cache) {
    SpinMutexLock l(&internal_allocator_cache_mu);
    return internal_allocator()->Deallocate(&internal_allocator_cache, ptr);
  }
  internal_allocator()->Deallocate(cache, ptr);
}

#endif  // SANITIZER_GO || defined(SANITIZER_USE_MALLOC)

const u64 kBlockMagic = 0x6A6CB03ABCEBC041ull;

static void NORETURN ReportInternalAllocatorOutOfMemory(uptr requested_size) {
  SetAllocatorOutOfMemory();
  Report("FATAL: %s: internal allocator is out of memory trying to allocate "
         "0x%zx bytes\n", SanitizerToolName, requested_size);
  Die();
}

void *InternalAlloc(uptr size, InternalAllocatorCache *cache, uptr alignment) {
  if (size + sizeof(u64) < size)
    return nullptr;
  void *p = RawInternalAlloc(size + sizeof(u64), cache, alignment);
  if (UNLIKELY(!p))
    ReportInternalAllocatorOutOfMemory(size + sizeof(u64));
  ((u64*)p)[0] = kBlockMagic;
  return (char*)p + sizeof(u64);
}

void *InternalRealloc(void *addr, uptr size, InternalAllocatorCache *cache) {
  if (!addr)
    return InternalAlloc(size, cache);
  if (size + sizeof(u64) < size)
    return nullptr;
  addr = (char*)addr - sizeof(u64);
  size = size + sizeof(u64);
  CHECK_EQ(kBlockMagic, ((u64*)addr)[0]);
  void *p = RawInternalRealloc(addr, size, cache);
  if (UNLIKELY(!p))
    ReportInternalAllocatorOutOfMemory(size);
  return (char*)p + sizeof(u64);
}

void *InternalReallocArray(void *addr, uptr count, uptr size,
                           InternalAllocatorCache *cache) {
  if (UNLIKELY(CheckForCallocOverflow(count, size))) {
    Report(
        "FATAL: %s: reallocarray parameters overflow: count * size (%zd * %zd) "
        "cannot be represented in type size_t\n",
        SanitizerToolName, count, size);
    Die();
  }
  return InternalRealloc(addr, count * size, cache);
}

void *InternalCalloc(uptr count, uptr size, InternalAllocatorCache *cache) {
  if (UNLIKELY(CheckForCallocOverflow(count, size))) {
    Report("FATAL: %s: calloc parameters overflow: count * size (%zd * %zd) "
           "cannot be represented in type size_t\n", SanitizerToolName, count,
           size);
    Die();
  }
  void *p = InternalAlloc(count * size, cache);
  if (LIKELY(p))
    internal_memset(p, 0, count * size);
  return p;
}

void InternalFree(void *addr, InternalAllocatorCache *cache) {
  if (!addr)
    return;
  addr = (char*)addr - sizeof(u64);
  CHECK_EQ(kBlockMagic, ((u64*)addr)[0]);
  ((u64*)addr)[0] = 0;
  RawInternalFree(addr, cache);
}

// LowLevelAllocator
constexpr uptr kLowLevelAllocatorDefaultAlignment = 8;
static uptr low_level_alloc_min_alignment = kLowLevelAllocatorDefaultAlignment;
static LowLevelAllocateCallback low_level_alloc_callback;

void *LowLevelAllocator::Allocate(uptr size) {
  // Align allocation size.
  size = RoundUpTo(size, low_level_alloc_min_alignment);
  if (allocated_end_ - allocated_current_ < (sptr)size) {
    uptr size_to_allocate = RoundUpTo(size, GetPageSizeCached());
    allocated_current_ =
        (char*)MmapOrDie(size_to_allocate, __func__);
    allocated_end_ = allocated_current_ + size_to_allocate;
    if (low_level_alloc_callback) {
      low_level_alloc_callback((uptr)allocated_current_,
                               size_to_allocate);
    }
  }
  CHECK(allocated_end_ - allocated_current_ >= (sptr)size);
  void *res = allocated_current_;
  allocated_current_ += size;
  return res;
}

void SetLowLevelAllocateMinAlignment(uptr alignment) {
  CHECK(IsPowerOfTwo(alignment));
  low_level_alloc_min_alignment = Max(alignment, low_level_alloc_min_alignment);
}

void SetLowLevelAllocateCallback(LowLevelAllocateCallback callback) {
  low_level_alloc_callback = callback;
}

// Allocator's OOM and other errors handling support.

static atomic_uint8_t allocator_out_of_memory = {0};
static atomic_uint8_t allocator_may_return_null = {0};

bool IsAllocatorOutOfMemory() {
  return atomic_load_relaxed(&allocator_out_of_memory);
}

void SetAllocatorOutOfMemory() {
  atomic_store_relaxed(&allocator_out_of_memory, 1);
}

bool AllocatorMayReturnNull() {
  return atomic_load(&allocator_may_return_null, memory_order_relaxed);
}

void SetAllocatorMayReturnNull(bool may_return_null) {
  atomic_store(&allocator_may_return_null, may_return_null,
               memory_order_relaxed);
}

void PrintHintAllocatorCannotReturnNull() {
  Report("HINT: if you don't care about these errors you may set "
         "allocator_may_return_null=1\n");
}

} // namespace __sanitizer

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