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
24 lines
1.0 KiB
C++
24 lines
1.0 KiB
C++
//===-- memprof_preinit.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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// Call __memprof_init at the very early stage of process startup.
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//===----------------------------------------------------------------------===//
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#include "memprof_internal.h"
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using namespace __memprof;
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#if SANITIZER_CAN_USE_PREINIT_ARRAY
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// The symbol is called __local_memprof_preinit, because it's not intended to
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// be exported. This code linked into the main executable when -fmemory-profile
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// is in the link flags. It can only use exported interface functions.
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__attribute__((section(".preinit_array"),
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used)) void (*__local_memprof_preinit)(void) = __memprof_preinit;
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#endif
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