3d4bba302d
See RFC for background: http://lists.llvm.org/pipermail/llvm-dev/2020-June/142744.html Follow on companion to the clang/llvm instrumentation support in D85948 and committed earlier. This patch adds the compiler-rt runtime support for the memory profiling. Note that much of this support was cloned from asan (and then greatly simplified and renamed). For example the interactions with the sanitizer_common allocators, error handling, interception, etc. The bulk of the memory profiling specific code can be found in the MemInfoBlock, MemInfoBlockCache, and related classes defined and used in memprof_allocator.cpp. For now, the memory profile is dumped to text (stderr by default, but honors the sanitizer_common log_path flag). It is dumped in either a default verbose format, or an optional terse format. This patch also adds a set of tests for the core functionality. Differential Revision: https://reviews.llvm.org/D87120
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
//===-- memprof_posix.cpp ------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of MemProfiler, a memory profiler.
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//
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// Posix-specific details.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_common/sanitizer_platform.h"
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#if !SANITIZER_POSIX
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#error Only Posix supported
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#endif
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#include "memprof_thread.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include <pthread.h>
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namespace __memprof {
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// ---------------------- TSD ---------------- {{{1
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static pthread_key_t tsd_key;
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static bool tsd_key_inited = false;
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void TSDInit(void (*destructor)(void *tsd)) {
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CHECK(!tsd_key_inited);
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tsd_key_inited = true;
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CHECK_EQ(0, pthread_key_create(&tsd_key, destructor));
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}
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void *TSDGet() {
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CHECK(tsd_key_inited);
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return pthread_getspecific(tsd_key);
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}
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void TSDSet(void *tsd) {
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CHECK(tsd_key_inited);
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pthread_setspecific(tsd_key, tsd);
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}
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void PlatformTSDDtor(void *tsd) {
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MemprofThreadContext *context = (MemprofThreadContext *)tsd;
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if (context->destructor_iterations > 1) {
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context->destructor_iterations--;
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CHECK_EQ(0, pthread_setspecific(tsd_key, tsd));
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return;
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}
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MemprofThread::TSDDtor(tsd);
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}
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} // namespace __memprof
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