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📄 README.txt(924 B)
📄 asan.syms.extra(39 B)
📄 asan_activation.cpp(4.55 KB)
📄 asan_activation.h(736 B)
📄 asan_activation_flags.inc(1.42 KB)
📄 asan_allocator.cpp(40.63 KB)
📄 asan_allocator.h(8.05 KB)
📄 asan_blacklist.txt(513 B)
📄 asan_debugging.cpp(4.7 KB)
📄 asan_descriptions.cpp(16.44 KB)
📄 asan_descriptions.h(7.59 KB)
📄 asan_errors.cpp(21.78 KB)
📄 asan_errors.h(14.75 KB)
📄 asan_fake_stack.cpp(10.82 KB)
📄 asan_fake_stack.h(6.89 KB)
📄 asan_flags.cpp(7.32 KB)
📄 asan_flags.h(1.45 KB)
📄 asan_flags.inc(7.92 KB)
📄 asan_fuchsia.cpp(8.18 KB)
📄 asan_globals.cpp(16.98 KB)
📄 asan_globals_win.cpp(2.03 KB)
📄 asan_init_version.h(1.88 KB)
📄 asan_interceptors.cpp(23.89 KB)
📄 asan_interceptors.h(4.86 KB)
📄 asan_interceptors_memintrinsics.cpp(1.52 KB)
📄 asan_interceptors_memintrinsics.h(8.12 KB)
📄 asan_interceptors_vfork.S(526 B)
📄 asan_interface.inc(7.25 KB)
📄 asan_interface_internal.h(10.88 KB)
📄 asan_internal.h(5.95 KB)
📄 asan_linux.cpp(7.45 KB)
📄 asan_lock.h(0 B)
📄 asan_mac.cpp(11.64 KB)
📄 asan_malloc_linux.cpp(9.8 KB)
📄 asan_malloc_local.h(1.92 KB)
📄 asan_malloc_mac.cpp(3.83 KB)
📄 asan_malloc_win.cpp(19.55 KB)
📄 asan_mapping.h(14.72 KB)
📄 asan_mapping_myriad.h(2.11 KB)
📄 asan_mapping_sparc64.h(2.95 KB)
📄 asan_memory_profile.cpp(4.12 KB)
📄 asan_new_delete.cpp(8.16 KB)
📄 asan_poisoning.cpp(16 KB)
📄 asan_poisoning.h(3.85 KB)
📄 asan_posix.cpp(4.12 KB)
📄 asan_preinit.cpp(1 KB)
📄 asan_premap_shadow.cpp(2.7 KB)
📄 asan_premap_shadow.h(913 B)
📄 asan_report.cpp(20.2 KB)
📄 asan_report.h(4.59 KB)
📄 asan_rtems.cpp(8.9 KB)
📄 asan_rtl.cpp(22.99 KB)
📄 asan_scariness_score.h(2.25 KB)
📄 asan_shadow_setup.cpp(6.2 KB)
📄 asan_stack.cpp(2.28 KB)
📄 asan_stack.h(3.29 KB)
📄 asan_stats.cpp(5.62 KB)
📄 asan_stats.h(2.05 KB)
📄 asan_suppressions.cpp(3.62 KB)
📄 asan_suppressions.h(1.01 KB)
📄 asan_thread.cpp(18.01 KB)
📄 asan_thread.h(5.56 KB)
📄 asan_win.cpp(13.74 KB)
📄 asan_win_dll_thunk.cpp(5.12 KB)
📄 asan_win_dynamic_runtime_thunk.cpp(5.4 KB)
📄 asan_win_weak_interception.cpp(1.14 KB)
📄 weak_symbols.txt(268 B)

Editing: asan_posix.cpp

//===-- asan_posix.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 a part of AddressSanitizer, an address sanity checker.
//
// Posix-specific details.
//===----------------------------------------------------------------------===//

#include "sanitizer_common/sanitizer_platform.h"
#if SANITIZER_POSIX

#include "asan_internal.h"
#include "asan_interceptors.h"
#include "asan_mapping.h"
#include "asan_poisoning.h"
#include "asan_report.h"
#include "asan_stack.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "sanitizer_common/sanitizer_posix.h"
#include "sanitizer_common/sanitizer_procmaps.h"

#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>

namespace __asan {

void AsanOnDeadlySignal(int signo, void *siginfo, void *context) {
  StartReportDeadlySignal();
  SignalContext sig(siginfo, context);
  ReportDeadlySignal(sig);
}

bool PlatformUnpoisonStacks() {
  stack_t signal_stack;
  CHECK_EQ(0, sigaltstack(nullptr, &signal_stack));
  uptr sigalt_bottom = (uptr)signal_stack.ss_sp;
  uptr sigalt_top = (uptr)((char *)signal_stack.ss_sp + signal_stack.ss_size);
  // If we're executing on the signal alternate stack AND the Linux flag
  // SS_AUTODISARM was used, then we cannot get the signal alternate stack
  // bounds from sigaltstack -- sigaltstack's output looks just as if no
  // alternate stack has ever been set up.
  // We're always unpoisoning the signal alternate stack to support jumping
  // between the default stack and signal alternate stack.
  if (signal_stack.ss_flags != SS_DISABLE)
    UnpoisonStack(sigalt_bottom, sigalt_top, "sigalt");

if (signal_stack.ss_flags != SS_ONSTACK)
    return false;

// Since we're on the signal altnerate stack, we cannot find the DEFAULT
  // stack bottom using a local variable.
  uptr default_bottom, tls_addr, tls_size, stack_size;
  GetThreadStackAndTls(/*main=*/false, &default_bottom, &stack_size, &tls_addr,
                       &tls_size);
  UnpoisonStack(default_bottom, default_bottom + stack_size, "default");
  return true;
}

// ---------------------- TSD ---------------- {{{1

#if SANITIZER_NETBSD && !ASAN_DYNAMIC
// Thread Static Data cannot be used in early static ASan init on NetBSD.
// Reuse the Asan TSD API for compatibility with existing code
// with an alternative implementation.

static void (*tsd_destructor)(void *tsd) = nullptr;

struct tsd_key {
  tsd_key() : key(nullptr) {}
  ~tsd_key() {
    CHECK(tsd_destructor);
    if (key)
      (*tsd_destructor)(key);
  }
  void *key;
};

static thread_local struct tsd_key key;

void AsanTSDInit(void (*destructor)(void *tsd)) {
  CHECK(!tsd_destructor);
  tsd_destructor = destructor;
}

void *AsanTSDGet() {
  CHECK(tsd_destructor);
  return key.key;
}

void AsanTSDSet(void *tsd) {
  CHECK(tsd_destructor);
  CHECK(tsd);
  CHECK(!key.key);
  key.key = tsd;
}

void PlatformTSDDtor(void *tsd) {
  CHECK(tsd_destructor);
  CHECK_EQ(key.key, tsd);
  key.key = nullptr;
  // Make sure that signal handler can not see a stale current thread pointer.
  atomic_signal_fence(memory_order_seq_cst);
  AsanThread::TSDDtor(tsd);
}
#else
static pthread_key_t tsd_key;
static bool tsd_key_inited = false;
void AsanTSDInit(void (*destructor)(void *tsd)) {
  CHECK(!tsd_key_inited);
  tsd_key_inited = true;
  CHECK_EQ(0, pthread_key_create(&tsd_key, destructor));
}

void *AsanTSDGet() {
  CHECK(tsd_key_inited);
  return pthread_getspecific(tsd_key);
}

void AsanTSDSet(void *tsd) {
  CHECK(tsd_key_inited);
  pthread_setspecific(tsd_key, tsd);
}

void PlatformTSDDtor(void *tsd) {
  AsanThreadContext *context = (AsanThreadContext*)tsd;
  if (context->destructor_iterations > 1) {
    context->destructor_iterations--;
    CHECK_EQ(0, pthread_setspecific(tsd_key, tsd));
    return;
  }
  AsanThread::TSDDtor(tsd);
}
#endif
}  // namespace __asan

#endif  // SANITIZER_POSIX

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Editing: asan_posix.cpp

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