1 //===-- sanitizer_procmaps_bsd.cpp ----------------------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // Information about the process mappings
10 // (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/types.h>
23 #include <sys/sysctl.h>
32 // Fix 'kinfo_vmentry' definition on FreeBSD prior v9.2 in 32-bit mode.
33 #if SANITIZER_FREEBSD && (SANITIZER_WORDSIZE == 32)
34 #include <osreldate.h>
35 #if __FreeBSD_version <= 902001 // v9.2
36 #define kinfo_vmentry xkinfo_vmentry
40 namespace __sanitizer {
42 void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
49 #elif SANITIZER_NETBSD
54 sizeof(struct kinfo_vmentry)
56 #error "not supported"
61 int Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), NULL, &Size, NULL, 0);
65 size_t MmapedSize = Size * 4 / 3;
66 void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
68 Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), VmMap, &Size, NULL, 0);
70 proc_maps->data = (char *)VmMap;
71 proc_maps->mmaped_size = MmapedSize;
72 proc_maps->len = Size;
75 bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
76 CHECK(!Error()); // can not fail
77 char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
78 if (data_.current >= last)
80 const struct kinfo_vmentry *VmEntry =
81 (const struct kinfo_vmentry *)data_.current;
83 segment->start = (uptr)VmEntry->kve_start;
84 segment->end = (uptr)VmEntry->kve_end;
85 segment->offset = (uptr)VmEntry->kve_offset;
87 segment->protection = 0;
88 if ((VmEntry->kve_protection & KVME_PROT_READ) != 0)
89 segment->protection |= kProtectionRead;
90 if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0)
91 segment->protection |= kProtectionWrite;
92 if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0)
93 segment->protection |= kProtectionExecute;
95 if (segment->filename != NULL && segment->filename_size > 0) {
96 internal_snprintf(segment->filename,
97 Min(segment->filename_size, (uptr)PATH_MAX), "%s",
101 #if SANITIZER_FREEBSD
102 data_.current += VmEntry->kve_structsize;
104 data_.current += sizeof(*VmEntry);
110 } // namespace __sanitizer