sanitizer_linux.h revision cb339108cca40fb4c1ed520656cb6cb75889a237 
15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)//===-- sanitizer_linux.h ---------------------------------------*- C++ -*-===//
25d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)//
35d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)//                     The LLVM Compiler Infrastructure
45d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)//
55d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// This file is distributed under the University of Illinois Open Source
65d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// License. See LICENSE.TXT for details.
75d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)//
85d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)//===----------------------------------------------------------------------===//
9a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)//
10a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Linux-specific syscall wrappers and classes.
11a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)//
12a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)//===----------------------------------------------------------------------===//
13a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifndef SANITIZER_LINUX_H
14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define SANITIZER_LINUX_H
150529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch
160529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch#include "sanitizer_common.h"
170529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch#include "sanitizer_internal_defs.h"
180529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch
190529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochstruct link_map;  // Opaque type returned by dlopen().
200529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochstruct sigaltstack;
210529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch
220529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochnamespace __sanitizer {
230529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch// Dirent structure for getdents(). Note that this structure is different from
240529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch// the one in <dirent.h>, which is used by readdir().
250529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochstruct linux_dirent;
260529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch
270529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch// Syscall wrappers.
280529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochuptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count);
290529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochuptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5);
300529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochuptr internal_sigaltstack(const struct sigaltstack* ss,
310529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch                          struct sigaltstack* oss);
32a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifdef __x86_64__
33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
34a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)                    int *parent_tidptr, void *newtls, int *child_tidptr);
35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif
36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)
370529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch// This class reads thread IDs from /proc/<pid>/task using only syscalls.
380529e5d033099cbfc42635f6f6183833b09dff6eBen Murdochclass ThreadLister {
39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) public:
40  explicit ThreadLister(int pid);
41  ~ThreadLister();
42  // GetNextTID returns -1 if the list of threads is exhausted, or if there has
43  // been an error.
44  int GetNextTID();
45  void Reset();
46  bool error();
47
48 private:
49  bool GetDirectoryEntries();
50
51  int pid_;
52  int descriptor_;
53  InternalScopedBuffer<char> buffer_;
54  bool error_;
55  struct linux_dirent* entry_;
56  int bytes_read_;
57};
58
59void AdjustStackSizeLinux(void *attr, int verbosity);
60
61// Exposed for testing.
62uptr ThreadDescriptorSize();
63uptr ThreadSelf();
64uptr ThreadSelfOffset();
65
66// Matches a library's file name against a base name (stripping path and version
67// information).
68bool LibraryNameIs(const char *full_name, const char *base_name);
69
70// Read the name of the current binary from /proc/self/exe.
71uptr ReadBinaryName(/*out*/char *buf, uptr buf_len);
72
73// Call cb for each region mapped by map.
74void ForEachMappedRegion(link_map *map, void (*cb)(const void *, uptr));
75
76}  // namespace __sanitizer
77
78#endif  // SANITIZER_LINUX_H
79