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
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
//===-- memprof_stats.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 statistics.
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//===----------------------------------------------------------------------===//
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#ifndef MEMPROF_STATS_H
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#define MEMPROF_STATS_H
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#include "memprof_allocator.h"
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#include "memprof_internal.h"
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namespace __memprof {
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// MemprofStats struct is NOT thread-safe.
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// Each MemprofThread has its own MemprofStats, which are sometimes flushed
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// to the accumulated MemprofStats.
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struct MemprofStats {
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// MemprofStats must be a struct consisting of uptr fields only.
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// When merging two MemprofStats structs, we treat them as arrays of uptr.
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uptr mallocs;
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uptr malloced;
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uptr malloced_overhead;
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uptr frees;
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uptr freed;
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uptr real_frees;
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uptr really_freed;
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uptr reallocs;
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uptr realloced;
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uptr mmaps;
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uptr mmaped;
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uptr munmaps;
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uptr munmaped;
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uptr malloc_large;
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uptr malloced_by_size[kNumberOfSizeClasses];
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// Ctor for global MemprofStats (accumulated stats for dead threads).
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explicit MemprofStats(LinkerInitialized) {}
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// Creates empty stats.
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MemprofStats();
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void Print(); // Prints formatted stats to stderr.
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void Clear();
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void MergeFrom(const MemprofStats *stats);
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};
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// Returns stats for GetCurrentThread(), or stats for fake "unknown thread"
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// if GetCurrentThread() returns 0.
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MemprofStats &GetCurrentThreadStats();
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// Flushes a given stats into accumulated stats of dead threads.
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void FlushToDeadThreadStats(MemprofStats *stats);
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} // namespace __memprof
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#endif // MEMPROF_STATS_H
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