100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
//===-- sanitizer_termination.cpp -------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// This file contains the Sanitizer termination functions CheckFailed and Die,
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/// and the callback functionalities associated with them.
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///
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//===----------------------------------------------------------------------===//
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#include "sanitizer_common.h"
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#include "sanitizer_libc.h"
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namespace __sanitizer {
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static const int kMaxNumOfInternalDieCallbacks = 5;
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static DieCallbackType InternalDieCallbacks[kMaxNumOfInternalDieCallbacks];
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bool AddDieCallback(DieCallbackType callback) {
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for (int i = 0; i < kMaxNumOfInternalDieCallbacks; i++) {
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if (InternalDieCallbacks[i] == nullptr) {
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InternalDieCallbacks[i] = callback;
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return true;
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}
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}
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return false;
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}
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bool RemoveDieCallback(DieCallbackType callback) {
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for (int i = 0; i < kMaxNumOfInternalDieCallbacks; i++) {
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if (InternalDieCallbacks[i] == callback) {
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internal_memmove(&InternalDieCallbacks[i], &InternalDieCallbacks[i + 1],
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sizeof(InternalDieCallbacks[0]) *
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(kMaxNumOfInternalDieCallbacks - i - 1));
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InternalDieCallbacks[kMaxNumOfInternalDieCallbacks - 1] = nullptr;
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return true;
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}
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}
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return false;
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}
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static DieCallbackType UserDieCallback;
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void SetUserDieCallback(DieCallbackType callback) {
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UserDieCallback = callback;
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}
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void NORETURN Die() {
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if (UserDieCallback)
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UserDieCallback();
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for (int i = kMaxNumOfInternalDieCallbacks - 1; i >= 0; i--) {
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if (InternalDieCallbacks[i])
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InternalDieCallbacks[i]();
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}
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if (common_flags()->abort_on_error)
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Abort();
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internal__exit(common_flags()->exitcode);
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}
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static void (*CheckUnwindCallback)();
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void SetCheckUnwindCallback(void (*callback)()) {
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CheckUnwindCallback = callback;
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}
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void NORETURN CheckFailed(const char *file, int line, const char *cond,
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u64 v1, u64 v2) {
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u32 tid = GetTid();
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Printf("%s: CHECK failed: %s:%d \"%s\" (0x%zx, 0x%zx) (tid=%u)\n",
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SanitizerToolName, StripModuleName(file), line, cond, (uptr)v1,
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(uptr)v2, tid);
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static atomic_uint32_t first_tid;
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u32 cmp = 0;
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if (!atomic_compare_exchange_strong(&first_tid, &cmp, tid,
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memory_order_relaxed)) {
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if (cmp == tid) {
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// Recursing into CheckFailed.
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} else {
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// Another thread fails already, let it print the stack and terminate.
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SleepForSeconds(2);
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}
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Trap();
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}
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if (CheckUnwindCallback)
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CheckUnwindCallback();
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Die();
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}
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} // namespace __sanitizer
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using namespace __sanitizer;
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extern "C" {
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SANITIZER_INTERFACE_ATTRIBUTE
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void __sanitizer_set_death_callback(void (*callback)(void)) {
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SetUserDieCallback(callback);
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}
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} // extern "C"
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