168d75effSDimitry Andric //===-- sanitizer_procmaps_solaris.cpp ------------------------------------===// 268d75effSDimitry Andric // 368d75effSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 468d75effSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 568d75effSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 668d75effSDimitry Andric // 768d75effSDimitry Andric //===----------------------------------------------------------------------===// 868d75effSDimitry Andric // 968d75effSDimitry Andric // Information about the process mappings (Solaris-specific parts). 1068d75effSDimitry Andric //===----------------------------------------------------------------------===// 1168d75effSDimitry Andric 1268d75effSDimitry Andric #include "sanitizer_platform.h" 1368d75effSDimitry Andric #if SANITIZER_SOLARIS 14*fcaf7f86SDimitry Andric # include <fcntl.h> 15*fcaf7f86SDimitry Andric # include <limits.h> 16*fcaf7f86SDimitry Andric # include <procfs.h> 17*fcaf7f86SDimitry Andric 1868d75effSDimitry Andric # include "sanitizer_common.h" 1968d75effSDimitry Andric # include "sanitizer_procmaps.h" 2068d75effSDimitry Andric 2168d75effSDimitry Andric namespace __sanitizer { 2268d75effSDimitry Andric 2368d75effSDimitry Andric void ReadProcMaps(ProcSelfMapsBuff *proc_maps) { 24*fcaf7f86SDimitry Andric uptr fd = internal_open("/proc/self/xmap", O_RDONLY); 25*fcaf7f86SDimitry Andric CHECK_NE(fd, -1); 26*fcaf7f86SDimitry Andric uptr Size = internal_filesize(fd); 27*fcaf7f86SDimitry Andric CHECK_GT(Size, 0); 28*fcaf7f86SDimitry Andric 29*fcaf7f86SDimitry Andric // Allow for additional entries by following mmap. 30*fcaf7f86SDimitry Andric size_t MmapedSize = Size * 4 / 3; 31*fcaf7f86SDimitry Andric void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()"); 32*fcaf7f86SDimitry Andric Size = internal_read(fd, VmMap, MmapedSize); 33*fcaf7f86SDimitry Andric CHECK_NE(Size, -1); 34*fcaf7f86SDimitry Andric internal_close(fd); 35*fcaf7f86SDimitry Andric proc_maps->data = (char *)VmMap; 36*fcaf7f86SDimitry Andric proc_maps->mmaped_size = MmapedSize; 37*fcaf7f86SDimitry Andric proc_maps->len = Size; 3868d75effSDimitry Andric } 3968d75effSDimitry Andric 4068d75effSDimitry Andric bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) { 4168d75effSDimitry Andric if (Error()) return false; // simulate empty maps 4268d75effSDimitry Andric char *last = data_.proc_self_maps.data + data_.proc_self_maps.len; 4368d75effSDimitry Andric if (data_.current >= last) return false; 4468d75effSDimitry Andric 45e8d8bef9SDimitry Andric prxmap_t *xmapentry = 46e8d8bef9SDimitry Andric const_cast<prxmap_t *>(reinterpret_cast<const prxmap_t *>(data_.current)); 4768d75effSDimitry Andric 4868d75effSDimitry Andric segment->start = (uptr)xmapentry->pr_vaddr; 4968d75effSDimitry Andric segment->end = (uptr)(xmapentry->pr_vaddr + xmapentry->pr_size); 5068d75effSDimitry Andric segment->offset = (uptr)xmapentry->pr_offset; 5168d75effSDimitry Andric 5268d75effSDimitry Andric segment->protection = 0; 5368d75effSDimitry Andric if ((xmapentry->pr_mflags & MA_READ) != 0) 5468d75effSDimitry Andric segment->protection |= kProtectionRead; 5568d75effSDimitry Andric if ((xmapentry->pr_mflags & MA_WRITE) != 0) 5668d75effSDimitry Andric segment->protection |= kProtectionWrite; 5768d75effSDimitry Andric if ((xmapentry->pr_mflags & MA_EXEC) != 0) 5868d75effSDimitry Andric segment->protection |= kProtectionExecute; 59*fcaf7f86SDimitry Andric if ((xmapentry->pr_mflags & MA_SHARED) != 0) 60*fcaf7f86SDimitry Andric segment->protection |= kProtectionShared; 6168d75effSDimitry Andric 6268d75effSDimitry Andric if (segment->filename != NULL && segment->filename_size > 0) { 6368d75effSDimitry Andric char proc_path[PATH_MAX + 1]; 6468d75effSDimitry Andric 65*fcaf7f86SDimitry Andric // Avoid unnecessary readlink on unnamed entires. 66*fcaf7f86SDimitry Andric if (xmapentry->pr_mapname[0] == '\0') 67*fcaf7f86SDimitry Andric segment->filename[0] = '\0'; 68*fcaf7f86SDimitry Andric else { 6968d75effSDimitry Andric internal_snprintf(proc_path, sizeof(proc_path), "/proc/self/path/%s", 7068d75effSDimitry Andric xmapentry->pr_mapname); 71349cc55cSDimitry Andric ssize_t sz = internal_readlink(proc_path, segment->filename, 72349cc55cSDimitry Andric segment->filename_size - 1); 73349cc55cSDimitry Andric 74349cc55cSDimitry Andric // If readlink failed, the map is anonymous. 75*fcaf7f86SDimitry Andric if (sz == -1) 76349cc55cSDimitry Andric segment->filename[0] = '\0'; 77*fcaf7f86SDimitry Andric else if ((size_t)sz < segment->filename_size) 78349cc55cSDimitry Andric // readlink doesn't NUL-terminate. 79349cc55cSDimitry Andric segment->filename[sz] = '\0'; 8068d75effSDimitry Andric } 81*fcaf7f86SDimitry Andric } 8268d75effSDimitry Andric 8368d75effSDimitry Andric data_.current += sizeof(prxmap_t); 8468d75effSDimitry Andric 8568d75effSDimitry Andric return true; 8668d75effSDimitry Andric } 8768d75effSDimitry Andric 8868d75effSDimitry Andric } // namespace __sanitizer 8968d75effSDimitry Andric 9068d75effSDimitry Andric #endif // SANITIZER_SOLARIS 91