1//===-- memprof_stack.cpp ------------------------------------------------===//
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// Code for MemProf stack trace.
12//===----------------------------------------------------------------------===//
13#include "memprof_stack.h"
14#include "memprof_internal.h"
15#include "sanitizer_common/sanitizer_atomic.h"
16
17namespace __memprof {
18
19static atomic_uint32_t malloc_context_size;
20
21void SetMallocContextSize(u32 size) {
22 atomic_store(a: &malloc_context_size, v: size, mo: memory_order_release);
23}
24
25u32 GetMallocContextSize() {
26 return atomic_load(a: &malloc_context_size, mo: memory_order_acquire);
27}
28
29} // namespace __memprof
30
31void __sanitizer::BufferedStackTrace::UnwindImpl(uptr pc, uptr bp,
32 void *context,
33 bool request_fast,
34 u32 max_depth) {
35 using namespace __memprof;
36 size = 0;
37 if (UNLIKELY(!memprof_inited))
38 return;
39 request_fast = StackTrace::WillUseFastUnwind(request_fast_unwind: request_fast);
40 MemprofThread *t = GetCurrentThread();
41 if (request_fast) {
42 if (t) {
43 Unwind(max_depth, pc, bp, context: nullptr, stack_top: t->stack_top(), stack_bottom: t->stack_bottom(),
44 request_fast_unwind: true);
45 }
46 return;
47 }
48 Unwind(max_depth, pc, bp, context, stack_top: 0, stack_bottom: 0, request_fast_unwind: false);
49}
50
51// ------------------ Interface -------------- {{{1
52
53extern "C" {
54SANITIZER_INTERFACE_ATTRIBUTE
55void __sanitizer_print_stack_trace() {
56 using namespace __memprof;
57 PRINT_CURRENT_STACK();
58}
59} // extern "C"
60