| 1 | //===-- memprof_stack.cpp ------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file is a part of MemProfiler, a memory profiler. |
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| 10 | // |
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| 11 | // Code for MemProf stack trace. |
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| 12 | //===----------------------------------------------------------------------===// |
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| 13 | #include "memprof_stack.h" |
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| 14 | #include "memprof_internal.h" |
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| 15 | #include "sanitizer_common/sanitizer_atomic.h" |
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| 16 | |
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| 17 | namespace __memprof { |
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| 18 | |
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| 19 | static atomic_uint32_t malloc_context_size; |
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| 20 | |
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| 21 | void SetMallocContextSize(u32 size) { |
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| 22 | atomic_store(a: &malloc_context_size, v: size, mo: memory_order_release); |
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| 23 | } |
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| 24 | |
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| 25 | u32 GetMallocContextSize() { |
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| 26 | return atomic_load(a: &malloc_context_size, mo: memory_order_acquire); |
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| 27 | } |
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| 28 | |
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| 29 | } // namespace __memprof |
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| 30 | |
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| 31 | void __sanitizer::BufferedStackTrace::UnwindImpl(uptr pc, uptr bp, |
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| 32 | void *context, |
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| 33 | bool request_fast, |
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| 34 | u32 max_depth) { |
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| 35 | using namespace __memprof; |
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| 36 | size = 0; |
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| 37 | if (UNLIKELY(!memprof_inited)) |
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| 38 | return; |
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| 39 | request_fast = StackTrace::WillUseFastUnwind(request_fast_unwind: request_fast); |
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| 40 | MemprofThread *t = GetCurrentThread(); |
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| 41 | if (request_fast) { |
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| 42 | if (t) { |
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| 43 | Unwind(max_depth, pc, bp, context: nullptr, stack_top: t->stack_top(), stack_bottom: t->stack_bottom(), |
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| 44 | request_fast_unwind: true); |
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| 45 | } |
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| 46 | return; |
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| 47 | } |
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| 48 | Unwind(max_depth, pc, bp, context, stack_top: 0, stack_bottom: 0, request_fast_unwind: false); |
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| 49 | } |
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| 50 | |
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| 51 | // ------------------ Interface -------------- {{{1 |
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| 52 | |
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| 53 | extern "C" { |
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| 54 | SANITIZER_INTERFACE_ATTRIBUTE |
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| 55 | void __sanitizer_print_stack_trace() { |
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| 56 | using namespace __memprof; |
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| 57 | PRINT_CURRENT_STACK(); |
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| 58 | } |
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| 59 | } // extern "C" |
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| 60 | |
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