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//===-- asan_stack.h --------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// ASan-private header for asan_stack.cc.
//===----------------------------------------------------------------------===//
#ifndef ASAN_STACK_H
#define ASAN_STACK_H
#include "asan_internal.h"
namespace __asan {
static const size_t kStackTraceMax = 64;
struct AsanStackTrace {
size_t size;
size_t max_size;
uintptr_t trace[kStackTraceMax];
static void PrintStack(uintptr_t *addr, size_t size);
void PrintStack() {
PrintStack(this->trace, this->size);
}
void CopyTo(uintptr_t *dst, size_t dst_size) {
for (size_t i = 0; i < size && i < dst_size; i++)
dst[i] = trace[i];
for (size_t i = size; i < dst_size; i++)
dst[i] = 0;
}
void CopyFrom(uintptr_t *src, size_t src_size) {
size = src_size;
if (size > kStackTraceMax) size = kStackTraceMax;
for (size_t i = 0; i < size; i++) {
trace[i] = src[i];
}
}
void FastUnwindStack(uintptr_t pc, uintptr_t bp);
// static _Unwind_Reason_Code Unwind_Trace(
// struct _Unwind_Context *ctx, void *param);
static uintptr_t GetCurrentPc();
static size_t CompressStack(AsanStackTrace *stack,
uint32_t *compressed, size_t size);
static void UncompressStack(AsanStackTrace *stack,
uint32_t *compressed, size_t size);
size_t full_frame_count;
};
} // namespace __asan
// Get the stack trace with the given pc and bp.
// The pc will be in the position 0 of the resulting stack trace.
// The bp may refer to the current frame or to the caller's frame.
// fast_unwind is currently unused.
#define GET_STACK_TRACE_WITH_PC_AND_BP(max_s, fast_unwind, pc, bp) \
AsanStackTrace stack; \
{ \
uintptr_t saved_pc = pc; \
uintptr_t saved_bp = bp; \
stack.size = 0; \
stack.full_frame_count = 0; \
stack.trace[0] = saved_pc; \
if ((max_s) > 1) { \
stack.max_size = max_s; \
stack.FastUnwindStack(saved_pc, saved_bp); \
} \
} \
#define GET_STACK_TRACE_HERE(max_size, fast_unwind) \
GET_STACK_TRACE_WITH_PC_AND_BP(max_size, fast_unwind, \
AsanStackTrace::GetCurrentPc(), GET_CURRENT_FRAME()) \
#define GET_STACK_TRACE_HERE_FOR_MALLOC \
GET_STACK_TRACE_HERE(FLAG_malloc_context_size, FLAG_fast_unwind)
#define GET_STACK_TRACE_HERE_FOR_FREE(ptr) \
GET_STACK_TRACE_HERE(FLAG_malloc_context_size, FLAG_fast_unwind)
#define PRINT_CURRENT_STACK() \
{ \
GET_STACK_TRACE_HERE(kStackTraceMax, false); \
stack.PrintStack(); \
} \
#endif // ASAN_STACK_H
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