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
79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
//===-- memprof_linux.cpp ------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of MemProfiler, a memory profiler.
|
|
//
|
|
// Linux-specific details.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "sanitizer_common/sanitizer_platform.h"
|
|
#if !SANITIZER_LINUX
|
|
#error Unsupported OS
|
|
#endif
|
|
|
|
#include "memprof_interceptors.h"
|
|
#include "memprof_internal.h"
|
|
#include "memprof_thread.h"
|
|
#include "sanitizer_common/sanitizer_flags.h"
|
|
#include "sanitizer_common/sanitizer_freebsd.h"
|
|
#include "sanitizer_common/sanitizer_libc.h"
|
|
#include "sanitizer_common/sanitizer_procmaps.h"
|
|
|
|
#include <dlfcn.h>
|
|
#include <fcntl.h>
|
|
#include <limits.h>
|
|
#include <link.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ucontext.h>
|
|
#include <unistd.h>
|
|
#include <unwind.h>
|
|
|
|
typedef enum {
|
|
MEMPROF_RT_VERSION_UNDEFINED = 0,
|
|
MEMPROF_RT_VERSION_DYNAMIC,
|
|
MEMPROF_RT_VERSION_STATIC,
|
|
} memprof_rt_version_t;
|
|
|
|
// FIXME: perhaps also store abi version here?
|
|
extern "C" {
|
|
SANITIZER_INTERFACE_ATTRIBUTE
|
|
memprof_rt_version_t __memprof_rt_version;
|
|
}
|
|
|
|
namespace __memprof {
|
|
|
|
void InitializePlatformInterceptors() {}
|
|
void InitializePlatformExceptionHandlers() {}
|
|
|
|
void *MemprofDoesNotSupportStaticLinkage() {
|
|
// This will fail to link with -static.
|
|
return &_DYNAMIC; // defined in link.h
|
|
}
|
|
|
|
uptr FindDynamicShadowStart() {
|
|
uptr shadow_size_bytes = MemToShadowSize(kHighMemEnd);
|
|
return MapDynamicShadow(shadow_size_bytes, SHADOW_SCALE,
|
|
/*min_shadow_base_alignment*/ 0, kHighMemEnd);
|
|
}
|
|
|
|
void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
|
|
ucontext_t *ucp = (ucontext_t *)context;
|
|
*stack = (uptr)ucp->uc_stack.ss_sp;
|
|
*ssize = ucp->uc_stack.ss_size;
|
|
}
|
|
|
|
void *MemprofDlSymNext(const char *sym) { return dlsym(RTLD_NEXT, sym); }
|
|
|
|
} // namespace __memprof
|