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-specific parts).
11 //===----------------------------------------------------------------------===//
13 #include "sanitizer_platform.h"
15 #include "sanitizer_common.h"
16 #include "sanitizer_freebsd.h"
17 #include "sanitizer_procmaps.h"
20 #include <sys/sysctl.h>
23 // Fix 'kinfo_vmentry' definition on FreeBSD prior v9.2 in 32-bit mode.
24 #if SANITIZER_FREEBSD && (SANITIZER_WORDSIZE == 32)
25 # include <osreldate.h>
26 # if __FreeBSD_version <= 902001 // v9.2
27 # define kinfo_vmentry xkinfo_vmentry
31 namespace __sanitizer {
33 void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
34 const int Mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid() };
36 int Err = sysctl(Mib, 4, NULL, &Size, NULL, 0);
40 size_t MmapedSize = Size * 4 / 3;
41 void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
43 Err = sysctl(Mib, 4, VmMap, &Size, NULL, 0);
46 proc_maps->data = (char*)VmMap;
47 proc_maps->mmaped_size = MmapedSize;
48 proc_maps->len = Size;
51 bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
52 char *last = proc_self_maps_.data + proc_self_maps_.len;
53 if (current_ >= last) return false;
54 struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry*)current_;
56 segment->start = (uptr)VmEntry->kve_start;
57 segment->end = (uptr)VmEntry->kve_end;
58 segment->offset = (uptr)VmEntry->kve_offset;
60 segment->protection = 0;
61 if ((VmEntry->kve_protection & KVME_PROT_READ) != 0)
62 segment->protection |= kProtectionRead;
63 if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0)
64 segment->protection |= kProtectionWrite;
65 if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0)
66 segment->protection |= kProtectionExecute;
68 if (segment->filename != NULL && segment->filename_size > 0) {
69 internal_snprintf(segment->filename,
70 Min(segment->filename_size, (uptr)PATH_MAX), "%s",
74 current_ += VmEntry->kve_structsize;
79 } // namespace __sanitizer
81 #endif // SANITIZER_FREEBSD