| Viktor Kutuzov | a37ad09 | 2014-08-06 10:16:52 +0000 | [diff] [blame^] | 1 | //===-- sanitizer_procmaps_freebsd.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 (FreeBSD-specific parts). |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #include "sanitizer_platform.h" |
| 14 | #if SANITIZER_FREEBSD |
| 15 | #include "sanitizer_common.h" |
| 16 | #include "sanitizer_freebsd.h" |
| 17 | #include "sanitizer_procmaps.h" |
| 18 | |
| 19 | #include <unistd.h> |
| 20 | #include <sys/sysctl.h> |
| 21 | #include <sys/user.h> |
| 22 | |
| 23 | namespace __sanitizer { |
| 24 | |
| 25 | void ReadProcMaps(ProcSelfMapsBuff *proc_maps) { |
| 26 | const int Mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid() }; |
| 27 | size_t Size = 0; |
| 28 | int Err = sysctl(Mib, 4, NULL, &Size, NULL, 0); |
| 29 | CHECK_EQ(Err, 0); |
| 30 | CHECK_GT(Size, 0); |
| 31 | |
| 32 | size_t MmapedSize = Size * 4 / 3; |
| 33 | void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()"); |
| 34 | Size = MmapedSize; |
| 35 | Err = sysctl(Mib, 4, VmMap, &Size, NULL, 0); |
| 36 | CHECK_EQ(Err, 0); |
| 37 | |
| 38 | proc_maps->data = (char*)VmMap; |
| 39 | proc_maps->mmaped_size = MmapedSize; |
| 40 | proc_maps->len = Size; |
| 41 | } |
| 42 | |
| 43 | bool MemoryMappingLayout::Next(uptr *start, uptr *end, uptr *offset, |
| 44 | char filename[], uptr filename_size, |
| 45 | uptr *protection) { |
| 46 | char *last = proc_self_maps_.data + proc_self_maps_.len; |
| 47 | if (current_ >= last) return false; |
| 48 | uptr dummy; |
| 49 | if (!start) start = &dummy; |
| 50 | if (!end) end = &dummy; |
| 51 | if (!offset) offset = &dummy; |
| 52 | if (!protection) protection = &dummy; |
| 53 | struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry*)current_; |
| 54 | |
| 55 | *start = (uptr)VmEntry->kve_start; |
| 56 | *end = (uptr)VmEntry->kve_end; |
| 57 | *offset = (uptr)VmEntry->kve_offset; |
| 58 | |
| 59 | *protection = 0; |
| 60 | if ((VmEntry->kve_protection & KVME_PROT_READ) != 0) |
| 61 | *protection |= kProtectionRead; |
| 62 | if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0) |
| 63 | *protection |= kProtectionWrite; |
| 64 | if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0) |
| 65 | *protection |= kProtectionExecute; |
| 66 | |
| 67 | if (filename != NULL && filename_size > 0) { |
| 68 | internal_snprintf(filename, |
| 69 | Min(filename_size, (uptr)PATH_MAX), |
| 70 | "%s", VmEntry->kve_path); |
| 71 | } |
| 72 | |
| 73 | current_ += VmEntry->kve_structsize; |
| 74 | |
| 75 | return true; |
| 76 | } |
| 77 | |
| 78 | } // namespace __sanitizer |
| 79 | |
| 80 | #endif // SANITIZER_FREEBSD |