1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
//===-- sanitizer_procmaps_bsd.cpp ----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Information about the process mappings
// (FreeBSD and NetBSD-specific parts).
//===----------------------------------------------------------------------===//
#include "sanitizer_platform.h"
#if SANITIZER_FREEBSD || SANITIZER_NETBSD
#include "sanitizer_common.h"
#include "sanitizer_procmaps.h"
// clang-format off
#include <sys/types.h>
#include <sys/sysctl.h>
// clang-format on
#include <unistd.h>
#if SANITIZER_FREEBSD
#include <sys/user.h>
#endif
#include <limits.h>
namespace __sanitizer {
#if SANITIZER_FREEBSD
void GetMemoryProfile(fill_profile_f cb, uptr *stats) {
const int Mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()};
struct kinfo_proc *InfoProc;
uptr Len = sizeof(*InfoProc);
uptr Size = Len;
InfoProc = (struct kinfo_proc *)MmapOrDie(Size, "GetMemoryProfile()");
CHECK_EQ(
internal_sysctl(Mib, ARRAY_SIZE(Mib), nullptr, (uptr *)InfoProc, &Len, 0),
0);
cb(0, InfoProc->ki_rssize * GetPageSizeCached(), false, stats);
UnmapOrDie(InfoProc, Size, true);
}
#elif SANITIZER_NETBSD
void GetMemoryProfile(fill_profile_f cb, uptr *stats) {
struct kinfo_proc2 *InfoProc;
uptr Len = sizeof(*InfoProc);
uptr Size = Len;
const int Mib[] = {CTL_KERN, KERN_PROC2, KERN_PROC_PID,
getpid(), (int)Size, 1};
InfoProc = (struct kinfo_proc2 *)MmapOrDie(Size, "GetMemoryProfile()");
CHECK_EQ(
internal_sysctl(Mib, ARRAY_SIZE(Mib), nullptr, (uptr *)InfoProc, &Len, 0),
0);
cb(0, InfoProc->p_vm_rssize * GetPageSizeCached(), false, stats);
UnmapOrDie(InfoProc, Size, true);
}
#endif
void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
const int Mib[] = {
#if SANITIZER_FREEBSD
CTL_KERN,
KERN_PROC,
KERN_PROC_VMMAP,
getpid()
#elif SANITIZER_NETBSD
CTL_VM,
VM_PROC,
VM_PROC_MAP,
getpid(),
sizeof(struct kinfo_vmentry)
#else
#error "not supported"
#endif
};
uptr Size = 0;
int Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), NULL, &Size, NULL, 0);
CHECK_EQ(Err, 0);
CHECK_GT(Size, 0);
size_t MmapedSize = Size * 4 / 3;
void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
Size = MmapedSize;
Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), VmMap, &Size, NULL, 0);
CHECK_EQ(Err, 0);
proc_maps->data = (char *)VmMap;
proc_maps->mmaped_size = MmapedSize;
proc_maps->len = Size;
}
bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
CHECK(!Error()); // can not fail
char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
if (data_.current >= last)
return false;
const struct kinfo_vmentry *VmEntry =
(const struct kinfo_vmentry *)data_.current;
segment->start = (uptr)VmEntry->kve_start;
segment->end = (uptr)VmEntry->kve_end;
segment->offset = (uptr)VmEntry->kve_offset;
segment->protection = 0;
if ((VmEntry->kve_protection & KVME_PROT_READ) != 0)
segment->protection |= kProtectionRead;
if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0)
segment->protection |= kProtectionWrite;
if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0)
segment->protection |= kProtectionExecute;
if (segment->filename != NULL && segment->filename_size > 0) {
internal_snprintf(segment->filename,
Min(segment->filename_size, (uptr)PATH_MAX), "%s",
VmEntry->kve_path);
}
#if SANITIZER_FREEBSD
data_.current += VmEntry->kve_structsize;
#else
data_.current += sizeof(*VmEntry);
#endif
return true;
}
} // namespace __sanitizer
#endif
|
