1//===-- memprof_stack.h ----------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is a part of MemProfiler, a memory profiler.
10//
11// MemProf-private header for memprof_stack.cpp.
12//===----------------------------------------------------------------------===//
13
14#ifndef MEMPROF_STACK_H
15#define MEMPROF_STACK_H
16
17#include "memprof_flags.h"
18#include "memprof_thread.h"
19#include "sanitizer_common/sanitizer_flags.h"
20#include "sanitizer_common/sanitizer_stacktrace.h"
21
22namespace __memprof {
23
24static const u32 kDefaultMallocContextSize = 30;
25
26void SetMallocContextSize(u32 size);
27u32 GetMallocContextSize();
28
29} // namespace __memprof
30
31// NOTE: A Rule of thumb is to retrieve stack trace in the interceptors
32// as early as possible (in functions exposed to the user), as we generally
33// don't want stack trace to contain functions from MemProf internals.
34
35#define GET_STACK_TRACE(max_size, fast) \
36 UNINITIALIZED BufferedStackTrace stack; \
37 if (max_size <= 2) { \
38 stack.size = max_size; \
39 if (max_size > 0) { \
40 stack.top_frame_bp = GET_CURRENT_FRAME(); \
41 stack.trace_buffer[0] = StackTrace::GetCurrentPc(); \
42 if (max_size > 1) \
43 stack.trace_buffer[1] = GET_CALLER_PC(); \
44 } \
45 } else { \
46 stack.Unwind(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), nullptr, \
47 fast, max_size); \
48 }
49
50#define GET_STACK_TRACE_FATAL_HERE \
51 GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_fatal)
52
53#define GET_STACK_TRACE_THREAD GET_STACK_TRACE(kStackTraceMax, true)
54
55#define GET_STACK_TRACE_MALLOC \
56 GET_STACK_TRACE(GetMallocContextSize(), common_flags()->fast_unwind_on_malloc)
57
58#define GET_STACK_TRACE_FREE GET_STACK_TRACE_MALLOC
59
60#define PRINT_CURRENT_STACK() \
61 { \
62 GET_STACK_TRACE_FATAL_HERE; \
63 stack.Print(); \
64 }
65
66#endif // MEMPROF_STACK_H
67