sanitizer_linux.h revision 7847d77b246635211c3bf465421d49d7af5226c1
1//===-- sanitizer_linux.h ---------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// Linux-specific syscall wrappers and classes. 11// 12//===----------------------------------------------------------------------===// 13#ifndef SANITIZER_LINUX_H 14#define SANITIZER_LINUX_H 15 16#include "sanitizer_platform.h" 17#if SANITIZER_LINUX 18#include "sanitizer_common.h" 19#include "sanitizer_internal_defs.h" 20 21struct link_map; // Opaque type returned by dlopen(). 22struct sigaltstack; 23 24namespace __sanitizer { 25// Dirent structure for getdents(). Note that this structure is different from 26// the one in <dirent.h>, which is used by readdir(). 27struct linux_dirent; 28 29// Syscall wrappers. 30uptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count); 31uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5); 32uptr internal_sigaltstack(const struct sigaltstack* ss, 33 struct sigaltstack* oss); 34#ifdef __x86_64__ 35uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg, 36 int *parent_tidptr, void *newtls, int *child_tidptr); 37#endif 38 39// This class reads thread IDs from /proc/<pid>/task using only syscalls. 40class ThreadLister { 41 public: 42 explicit ThreadLister(int pid); 43 ~ThreadLister(); 44 // GetNextTID returns -1 if the list of threads is exhausted, or if there has 45 // been an error. 46 int GetNextTID(); 47 void Reset(); 48 bool error(); 49 50 private: 51 bool GetDirectoryEntries(); 52 53 int pid_; 54 int descriptor_; 55 InternalScopedBuffer<char> buffer_; 56 bool error_; 57 struct linux_dirent* entry_; 58 int bytes_read_; 59}; 60 61void AdjustStackSizeLinux(void *attr, int verbosity); 62 63// Exposed for testing. 64uptr ThreadDescriptorSize(); 65uptr ThreadSelf(); 66uptr ThreadSelfOffset(); 67 68// Matches a library's file name against a base name (stripping path and version 69// information). 70bool LibraryNameIs(const char *full_name, const char *base_name); 71 72// Read the name of the current binary from /proc/self/exe. 73uptr ReadBinaryName(/*out*/char *buf, uptr buf_len); 74// Cache the value of /proc/self/exe. 75void CacheBinaryName(); 76 77// Call cb for each region mapped by map. 78void ForEachMappedRegion(link_map *map, void (*cb)(const void *, uptr)); 79 80} // namespace __sanitizer 81 82#endif // SANITIZER_LINUX 83#endif // SANITIZER_LINUX_H 84