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//===-- asan_stack.h --------------------------------------------*- 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 is a part of AddressSanitizer, an address sanity checker.
//
// ASan-private header for asan_stack.cpp.
//===----------------------------------------------------------------------===//
#ifndef ASAN_STACK_H
#define ASAN_STACK_H
#include "asan_flags.h"
#include "asan_thread.h"
#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_stacktrace.h"
namespace __asan {
static const u32 kDefaultMallocContextSize = 30;
void SetMallocContextSize(u32 size);
u32 GetMallocContextSize();
} // namespace __asan
// NOTE: A Rule of thumb is to retrieve stack trace in the interceptors
// as early as possible (in functions exposed to the user), as we generally
// don't want stack trace to contain functions from ASan internals.
#define GET_STACK_TRACE(max_size, fast) \
BufferedStackTrace stack; \
if (max_size <= 2) { \
stack.size = max_size; \
if (max_size > 0) { \
stack.top_frame_bp = GET_CURRENT_FRAME(); \
stack.trace_buffer[0] = StackTrace::GetCurrentPc(); \
if (max_size > 1) stack.trace_buffer[1] = GET_CALLER_PC(); \
} \
} else { \
stack.Unwind(StackTrace::GetCurrentPc(), \
GET_CURRENT_FRAME(), nullptr, fast, max_size); \
}
#define GET_STACK_TRACE_FATAL(pc, bp) \
BufferedStackTrace stack; \
stack.Unwind(pc, bp, nullptr, \
common_flags()->fast_unwind_on_fatal)
#define GET_STACK_TRACE_SIGNAL(sig) \
BufferedStackTrace stack; \
stack.Unwind((sig).pc, (sig).bp, (sig).context, \
common_flags()->fast_unwind_on_fatal)
#define GET_STACK_TRACE_FATAL_HERE \
GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_fatal)
#define GET_STACK_TRACE_CHECK_HERE \
GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_check)
#define GET_STACK_TRACE_THREAD \
GET_STACK_TRACE(kStackTraceMax, true)
#define GET_STACK_TRACE_MALLOC \
GET_STACK_TRACE(GetMallocContextSize(), common_flags()->fast_unwind_on_malloc)
#define GET_STACK_TRACE_FREE GET_STACK_TRACE_MALLOC
#define PRINT_CURRENT_STACK() \
{ \
GET_STACK_TRACE_FATAL_HERE; \
stack.Print(); \
}
#define PRINT_CURRENT_STACK_CHECK() \
{ \
GET_STACK_TRACE_CHECK_HERE; \
stack.Print(); \
}
#endif // ASAN_STACK_H
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