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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
80 lines
4.1 KiB
C++
80 lines
4.1 KiB
C++
//===-- memprof_interceptors_memintrinsics.h -------------------*- C++ -*-===//
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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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// MemProf-private header for memprof_interceptors_memintrinsics.cpp
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//===---------------------------------------------------------------------===//
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#ifndef MEMPROF_MEMINTRIN_H
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#define MEMPROF_MEMINTRIN_H
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#include "interception/interception.h"
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#include "memprof_interface_internal.h"
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#include "memprof_internal.h"
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#include "memprof_mapping.h"
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DECLARE_REAL(void *, memcpy, void *to, const void *from, uptr size)
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DECLARE_REAL(void *, memset, void *block, int c, uptr size)
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namespace __memprof {
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// We implement ACCESS_MEMORY_RANGE, MEMPROF_READ_RANGE,
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// and MEMPROF_WRITE_RANGE as macro instead of function so
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// that no extra frames are created, and stack trace contains
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// relevant information only.
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#define ACCESS_MEMORY_RANGE(offset, size) \
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do { \
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__memprof_record_access_range(offset, size); \
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} while (0)
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// memcpy is called during __memprof_init() from the internals of printf(...).
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// We do not treat memcpy with to==from as a bug.
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// See http://llvm.org/bugs/show_bug.cgi?id=11763.
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#define MEMPROF_MEMCPY_IMPL(to, from, size) \
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do { \
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if (UNLIKELY(!memprof_inited)) \
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return internal_memcpy(to, from, size); \
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if (memprof_init_is_running) { \
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return REAL(memcpy)(to, from, size); \
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} \
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ENSURE_MEMPROF_INITED(); \
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MEMPROF_READ_RANGE(from, size); \
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MEMPROF_WRITE_RANGE(to, size); \
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return REAL(memcpy)(to, from, size); \
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} while (0)
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// memset is called inside Printf.
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#define MEMPROF_MEMSET_IMPL(block, c, size) \
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do { \
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if (UNLIKELY(!memprof_inited)) \
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return internal_memset(block, c, size); \
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if (memprof_init_is_running) { \
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return REAL(memset)(block, c, size); \
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} \
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ENSURE_MEMPROF_INITED(); \
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MEMPROF_WRITE_RANGE(block, size); \
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return REAL(memset)(block, c, size); \
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} while (0)
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#define MEMPROF_MEMMOVE_IMPL(to, from, size) \
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do { \
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if (UNLIKELY(!memprof_inited)) \
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return internal_memmove(to, from, size); \
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ENSURE_MEMPROF_INITED(); \
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MEMPROF_READ_RANGE(from, size); \
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MEMPROF_WRITE_RANGE(to, size); \
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return internal_memmove(to, from, size); \
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} while (0)
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#define MEMPROF_READ_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size)
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#define MEMPROF_WRITE_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size)
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} // namespace __memprof
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#endif // MEMPROF_MEMINTRIN_H
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