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