1 //===-- memprof_linux.cpp ------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of MemProfiler, a memory profiler. 10 // 11 // Linux-specific details. 12 //===----------------------------------------------------------------------===// 13 14 #include "sanitizer_common/sanitizer_platform.h" 15 #if !SANITIZER_LINUX 16 #error Unsupported OS 17 #endif 18 19 #include "memprof_interceptors.h" 20 #include "memprof_internal.h" 21 #include "memprof_thread.h" 22 #include "sanitizer_common/sanitizer_flags.h" 23 #include "sanitizer_common/sanitizer_libc.h" 24 #include "sanitizer_common/sanitizer_procmaps.h" 25 26 #include <dlfcn.h> 27 #include <fcntl.h> 28 #include <limits.h> 29 #include <link.h> 30 #include <pthread.h> 31 #include <stdio.h> 32 #include <sys/mman.h> 33 #include <sys/resource.h> 34 #include <sys/syscall.h> 35 #include <sys/time.h> 36 #include <sys/types.h> 37 #include <sys/ucontext.h> 38 #include <unistd.h> 39 #include <unwind.h> 40 41 extern ElfW(Dyn) _DYNAMIC[]; 42 43 typedef enum { 44 MEMPROF_RT_VERSION_UNDEFINED = 0, 45 MEMPROF_RT_VERSION_DYNAMIC, 46 MEMPROF_RT_VERSION_STATIC, 47 } memprof_rt_version_t; 48 49 // FIXME: perhaps also store abi version here? 50 extern "C" { 51 SANITIZER_INTERFACE_ATTRIBUTE 52 memprof_rt_version_t __memprof_rt_version; 53 } 54 55 namespace __memprof { 56 57 void InitializePlatformInterceptors() {} 58 void InitializePlatformExceptionHandlers() {} 59 60 void *MemprofDoesNotSupportStaticLinkage() { 61 // This will fail to link with -static. 62 return &_DYNAMIC; 63 } 64 65 uptr FindDynamicShadowStart() { 66 uptr shadow_size_bytes = MemToShadowSize(kHighMemEnd); 67 return MapDynamicShadow(shadow_size_bytes, SHADOW_SCALE, 68 /*min_shadow_base_alignment*/ 0, kHighMemEnd); 69 } 70 71 void *MemprofDlSymNext(const char *sym) { return dlsym(RTLD_NEXT, sym); } 72 73 } // namespace __memprof 74