1 //===-- sanitizer_procmaps.h ------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is shared between AddressSanitizer and ThreadSanitizer.
12 // Information about the process mappings.
13 //===----------------------------------------------------------------------===//
14 #ifndef SANITIZER_PROCMAPS_H
15 #define SANITIZER_PROCMAPS_H
17 #include "sanitizer_common.h"
18 #include "sanitizer_internal_defs.h"
19 #include "sanitizer_mutex.h"
21 namespace __sanitizer {
23 #if SANITIZER_FREEBSD || SANITIZER_LINUX
24 struct ProcSelfMapsBuff {
30 // Reads process memory map in an OS-specific way.
31 void ReadProcMaps(ProcSelfMapsBuff *proc_maps);
32 #endif // SANITIZER_FREEBSD || SANITIZER_LINUX
34 class MemoryMappingLayout {
36 explicit MemoryMappingLayout(bool cache_enabled);
37 ~MemoryMappingLayout();
38 bool Next(uptr *start, uptr *end, uptr *offset,
39 char filename[], uptr filename_size, uptr *protection);
41 // In some cases, e.g. when running under a sandbox on Linux, ASan is unable
42 // to obtain the memory mappings. It should fall back to pre-cached data
43 // instead of aborting.
44 static void CacheMemoryMappings();
46 // Adds all mapped objects into a vector.
47 void DumpListOfModules(InternalMmapVector<LoadedModule> *modules);
49 // Memory protection masks.
50 static const uptr kProtectionRead = 1;
51 static const uptr kProtectionWrite = 2;
52 static const uptr kProtectionExecute = 4;
53 static const uptr kProtectionShared = 8;
58 // FIXME: Hide implementation details for different platforms in
59 // platform-specific files.
60 # if SANITIZER_FREEBSD || SANITIZER_LINUX
61 ProcSelfMapsBuff proc_self_maps_;
64 // Static mappings cache.
65 static ProcSelfMapsBuff cached_proc_self_maps_;
66 static StaticSpinMutex cache_lock_; // protects cached_proc_self_maps_.
68 template<u32 kLCSegment, typename SegmentCommand>
69 bool NextSegmentLoad(uptr *start, uptr *end, uptr *offset,
70 char filename[], uptr filename_size,
74 u32 current_filetype_;
75 int current_load_cmd_count_;
76 char *current_load_cmd_addr_;
80 typedef void (*fill_profile_f)(uptr start, uptr rss, bool file,
81 /*out*/uptr *stats, uptr stats_size);
83 // Parse the contents of /proc/self/smaps and generate a memory profile.
84 // |cb| is a tool-specific callback that fills the |stats| array containing
85 // |stats_size| elements.
86 void GetMemoryProfile(fill_profile_f cb, uptr *stats, uptr stats_size);
88 // Returns code range for the specified module.
89 bool GetCodeRangeForFile(const char *module, uptr *start, uptr *end);
91 bool IsDecimal(char c);
92 uptr ParseDecimal(const char **p);
94 uptr ParseHex(const char **p);
96 } // namespace __sanitizer
98 #endif // SANITIZER_PROCMAPS_H