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
94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
//===-- memprof_flags.cpp --------------------------------------*- 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 flag parsing logic.
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//===----------------------------------------------------------------------===//
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#include "memprof_flags.h"
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#include "memprof_interface_internal.h"
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#include "memprof_stack.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_flag_parser.h"
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#include "sanitizer_common/sanitizer_flags.h"
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namespace __memprof {
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Flags memprof_flags_dont_use_directly; // use via flags().
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static const char *MaybeUseMemprofDefaultOptionsCompileDefinition() {
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#ifdef MEMPROF_DEFAULT_OPTIONS
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return SANITIZER_STRINGIFY(MEMPROF_DEFAULT_OPTIONS);
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#else
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return "";
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#endif
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}
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void Flags::SetDefaults() {
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#define MEMPROF_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
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#include "memprof_flags.inc"
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#undef MEMPROF_FLAG
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}
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static void RegisterMemprofFlags(FlagParser *parser, Flags *f) {
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#define MEMPROF_FLAG(Type, Name, DefaultValue, Description) \
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RegisterFlag(parser, #Name, Description, &f->Name);
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#include "memprof_flags.inc"
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#undef MEMPROF_FLAG
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}
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void InitializeFlags() {
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// Set the default values and prepare for parsing MemProf and common flags.
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SetCommonFlagsDefaults();
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{
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CommonFlags cf;
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cf.CopyFrom(*common_flags());
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cf.external_symbolizer_path = GetEnv("MEMPROF_SYMBOLIZER_PATH");
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cf.malloc_context_size = kDefaultMallocContextSize;
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cf.intercept_tls_get_addr = true;
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cf.exitcode = 1;
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OverrideCommonFlags(cf);
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}
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Flags *f = flags();
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f->SetDefaults();
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FlagParser memprof_parser;
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RegisterMemprofFlags(&memprof_parser, f);
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RegisterCommonFlags(&memprof_parser);
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// Override from MemProf compile definition.
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const char *memprof_compile_def =
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MaybeUseMemprofDefaultOptionsCompileDefinition();
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memprof_parser.ParseString(memprof_compile_def);
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// Override from user-specified string.
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const char *memprof_default_options = __memprof_default_options();
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memprof_parser.ParseString(memprof_default_options);
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// Override from command line.
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memprof_parser.ParseStringFromEnv("MEMPROF_OPTIONS");
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InitializeCommonFlags();
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if (Verbosity())
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ReportUnrecognizedFlags();
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if (common_flags()->help) {
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memprof_parser.PrintFlagDescriptions();
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}
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CHECK_LE((uptr)common_flags()->malloc_context_size, kStackTraceMax);
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}
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} // namespace __memprof
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SANITIZER_INTERFACE_WEAK_DEF(const char *, __memprof_default_options, void) {
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return "";
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}
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