1 //===-- sanitizer_procmaps_solaris.cpp ------------------------------------===//
2 //
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
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Information about the process mappings (Solaris-specific parts).
10 //===----------------------------------------------------------------------===//
11
12 #include "sanitizer_platform.h"
13 #if SANITIZER_SOLARIS
14 #include "sanitizer_common.h"
15 #include "sanitizer_procmaps.h"
16
17 // Before Solaris 11.4, <procfs.h> doesn't work in a largefile environment.
18 #undef _FILE_OFFSET_BITS
19 #include <procfs.h>
20 #include <limits.h>
21
22 namespace __sanitizer {
23
ReadProcMaps(ProcSelfMapsBuff * proc_maps)24 void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
25 if (!ReadFileToBuffer("/proc/self/xmap", &proc_maps->data,
26 &proc_maps->mmaped_size, &proc_maps->len)) {
27 proc_maps->data = nullptr;
28 proc_maps->mmaped_size = 0;
29 proc_maps->len = 0;
30 }
31 }
32
Next(MemoryMappedSegment * segment)33 bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
34 if (Error()) return false; // simulate empty maps
35 char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
36 if (data_.current >= last) return false;
37
38 prxmap_t *xmapentry = (prxmap_t*)data_.current;
39
40 segment->start = (uptr)xmapentry->pr_vaddr;
41 segment->end = (uptr)(xmapentry->pr_vaddr + xmapentry->pr_size);
42 segment->offset = (uptr)xmapentry->pr_offset;
43
44 segment->protection = 0;
45 if ((xmapentry->pr_mflags & MA_READ) != 0)
46 segment->protection |= kProtectionRead;
47 if ((xmapentry->pr_mflags & MA_WRITE) != 0)
48 segment->protection |= kProtectionWrite;
49 if ((xmapentry->pr_mflags & MA_EXEC) != 0)
50 segment->protection |= kProtectionExecute;
51
52 if (segment->filename != NULL && segment->filename_size > 0) {
53 char proc_path[PATH_MAX + 1];
54
55 internal_snprintf(proc_path, sizeof(proc_path), "/proc/self/path/%s",
56 xmapentry->pr_mapname);
57 internal_readlink(proc_path, segment->filename, segment->filename_size);
58 }
59
60 data_.current += sizeof(prxmap_t);
61
62 return true;
63 }
64
65 } // namespace __sanitizer
66
67 #endif // SANITIZER_SOLARIS
68