1 //===-- sanitizer_procmaps_freebsd.cc -------------------------------------===//
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 // Information about the process mappings (FreeBSD and NetBSD-specific parts).
11 //===----------------------------------------------------------------------===//
13 #include "sanitizer_platform.h"
14 #if SANITIZER_FREEBSD || SANITIZER_NETBSD
15 #include "sanitizer_common.h"
17 #include "sanitizer_freebsd.h"
19 #include "sanitizer_procmaps.h"
22 #include <sys/sysctl.h>
27 // Fix 'kinfo_vmentry' definition on FreeBSD prior v9.2 in 32-bit mode.
28 #if SANITIZER_FREEBSD && (SANITIZER_WORDSIZE == 32)
29 # include <osreldate.h>
30 # if __FreeBSD_version <= 902001 // v9.2
31 # define kinfo_vmentry xkinfo_vmentry
35 namespace __sanitizer {
37 void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
49 sizeof(struct kinfo_vmentry)
54 int Err = sysctl(Mib, ARRAY_SIZE(Mib), NULL, &Size, NULL, 0);
58 size_t MmapedSize = Size * 4 / 3;
59 void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
61 Err = sysctl(Mib, ARRAY_SIZE(Mib), VmMap, &Size, NULL, 0);
64 proc_maps->data = (char*)VmMap;
65 proc_maps->mmaped_size = MmapedSize;
66 proc_maps->len = Size;
69 bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
70 char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
71 if (data_.current >= last) return false;
72 struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry *)data_.current;
74 segment->start = (uptr)VmEntry->kve_start;
75 segment->end = (uptr)VmEntry->kve_end;
76 segment->offset = (uptr)VmEntry->kve_offset;
78 segment->protection = 0;
79 if ((VmEntry->kve_protection & KVME_PROT_READ) != 0)
80 segment->protection |= kProtectionRead;
81 if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0)
82 segment->protection |= kProtectionWrite;
83 if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0)
84 segment->protection |= kProtectionExecute;
86 if (segment->filename != NULL && segment->filename_size > 0) {
87 internal_snprintf(segment->filename,
88 Min(segment->filename_size, (uptr)PATH_MAX), "%s",
93 data_.current += VmEntry->kve_structsize;
95 data_.current += sizeof(*VmEntry);
101 } // namespace __sanitizer
103 #endif // SANITIZER_FREEBSD || SANITIZER_NETBSD