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
50 lines
2.3 KiB
C++
50 lines
2.3 KiB
C++
//===-- memprof_flags.inc --------------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// MemProf runtime flags.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#ifndef MEMPROF_FLAG
|
|
#error "Define MEMPROF_FLAG prior to including this file!"
|
|
#endif
|
|
|
|
// MEMPROF_FLAG(Type, Name, DefaultValue, Description)
|
|
// See COMMON_FLAG in sanitizer_flags.inc for more details.
|
|
|
|
MEMPROF_FLAG(bool, unmap_shadow_on_exit, false,
|
|
"If set, explicitly unmaps the (huge) shadow at exit.")
|
|
MEMPROF_FLAG(bool, protect_shadow_gap, true, "If set, mprotect the shadow gap")
|
|
MEMPROF_FLAG(bool, print_legend, true, "Print the legend for the shadow bytes.")
|
|
MEMPROF_FLAG(bool, atexit, false,
|
|
"If set, prints MemProf exit stats even after program terminates "
|
|
"successfully.")
|
|
MEMPROF_FLAG(
|
|
bool, print_full_thread_history, true,
|
|
"If set, prints thread creation stacks for the threads involved in the "
|
|
"report and their ancestors up to the main thread.")
|
|
|
|
MEMPROF_FLAG(bool, halt_on_error, true,
|
|
"Crash the program after printing the first error report "
|
|
"(WARNING: USE AT YOUR OWN RISK!)")
|
|
MEMPROF_FLAG(bool, allocator_frees_and_returns_null_on_realloc_zero, true,
|
|
"realloc(p, 0) is equivalent to free(p) by default (Same as the "
|
|
"POSIX standard). If set to false, realloc(p, 0) will return a "
|
|
"pointer to an allocated space which can not be used.")
|
|
MEMPROF_FLAG(bool, print_terse, false,
|
|
"If set, prints memory profile in a terse format.")
|
|
|
|
MEMPROF_FLAG(
|
|
int, mem_info_cache_entries, 16381,
|
|
"Size in entries of the mem info block cache, should be closest prime"
|
|
" number to a power of two for best hashing.")
|
|
MEMPROF_FLAG(bool, print_mem_info_cache_miss_rate, false,
|
|
"If set, prints the miss rate of the mem info block cache.")
|
|
MEMPROF_FLAG(
|
|
bool, print_mem_info_cache_miss_rate_details, false,
|
|
"If set, prints detailed miss rates of the mem info block cache sets.")
|