Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 1 | //===-- sanitizer_procmaps_linux.cc ---------------------------------------===// |
| 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 | // Information about the process mappings (Linux-specific parts). |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #include "sanitizer_platform.h" |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 14 | #if SANITIZER_LINUX |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 15 | #include "sanitizer_common.h" |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 16 | #include "sanitizer_procmaps.h" |
| 17 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 18 | namespace __sanitizer { |
| 19 | |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 20 | void ReadProcMaps(ProcSelfMapsBuff *proc_maps) { |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 21 | proc_maps->len = ReadFileToBuffer("/proc/self/maps", &proc_maps->data, |
| 22 | &proc_maps->mmaped_size, 1 << 26); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 23 | } |
| 24 | |
| 25 | static bool IsOneOf(char c, char c1, char c2) { |
| 26 | return c == c1 || c == c2; |
| 27 | } |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 28 | |
| 29 | bool MemoryMappingLayout::Next(uptr *start, uptr *end, uptr *offset, |
| 30 | char filename[], uptr filename_size, |
| 31 | uptr *protection) { |
| 32 | char *last = proc_self_maps_.data + proc_self_maps_.len; |
| 33 | if (current_ >= last) return false; |
| 34 | uptr dummy; |
| 35 | if (!start) start = &dummy; |
| 36 | if (!end) end = &dummy; |
| 37 | if (!offset) offset = &dummy; |
| 38 | if (!protection) protection = &dummy; |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 39 | char *next_line = (char*)internal_memchr(current_, '\n', last - current_); |
| 40 | if (next_line == 0) |
| 41 | next_line = last; |
| 42 | // Example: 08048000-08056000 r-xp 00000000 03:0c 64593 /foo/bar |
| 43 | *start = ParseHex(¤t_); |
| 44 | CHECK_EQ(*current_++, '-'); |
| 45 | *end = ParseHex(¤t_); |
| 46 | CHECK_EQ(*current_++, ' '); |
| 47 | CHECK(IsOneOf(*current_, '-', 'r')); |
| 48 | *protection = 0; |
| 49 | if (*current_++ == 'r') |
| 50 | *protection |= kProtectionRead; |
| 51 | CHECK(IsOneOf(*current_, '-', 'w')); |
| 52 | if (*current_++ == 'w') |
| 53 | *protection |= kProtectionWrite; |
| 54 | CHECK(IsOneOf(*current_, '-', 'x')); |
| 55 | if (*current_++ == 'x') |
| 56 | *protection |= kProtectionExecute; |
| 57 | CHECK(IsOneOf(*current_, 's', 'p')); |
| 58 | if (*current_++ == 's') |
| 59 | *protection |= kProtectionShared; |
| 60 | CHECK_EQ(*current_++, ' '); |
| 61 | *offset = ParseHex(¤t_); |
| 62 | CHECK_EQ(*current_++, ' '); |
| 63 | ParseHex(¤t_); |
| 64 | CHECK_EQ(*current_++, ':'); |
| 65 | ParseHex(¤t_); |
| 66 | CHECK_EQ(*current_++, ' '); |
| 67 | while (IsDecimal(*current_)) |
| 68 | current_++; |
| 69 | // Qemu may lack the trailing space. |
| 70 | // http://code.google.com/p/address-sanitizer/issues/detail?id=160 |
| 71 | // CHECK_EQ(*current_++, ' '); |
| 72 | // Skip spaces. |
| 73 | while (current_ < next_line && *current_ == ' ') |
| 74 | current_++; |
| 75 | // Fill in the filename. |
| 76 | uptr i = 0; |
| 77 | while (current_ < next_line) { |
| 78 | if (filename && i < filename_size - 1) |
| 79 | filename[i++] = *current_; |
| 80 | current_++; |
| 81 | } |
| 82 | if (filename && i < filename_size) |
| 83 | filename[i] = 0; |
| 84 | current_ = next_line + 1; |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 85 | return true; |
| 86 | } |
| 87 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 88 | } // namespace __sanitizer |
| 89 | |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 90 | #endif // SANITIZER_LINUX |