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 12bdd1243dSDimitry Andric // Before Solaris 11.4, <procfs.h> doesn't work in a largefile environment. 13bdd1243dSDimitry Andric #undef _FILE_OFFSET_BITS 14*d686ce93SDimitry Andric 15*d686ce93SDimitry Andric // Avoid conflict between `_TIME_BITS` defined vs. `_FILE_OFFSET_BITS` 16*d686ce93SDimitry Andric // undefined in some Linux configurations. 17*d686ce93SDimitry Andric #undef _TIME_BITS 1868d75effSDimitry Andric #include "sanitizer_platform.h" 1968d75effSDimitry Andric #if SANITIZER_SOLARIS 20fcaf7f86SDimitry Andric # include <fcntl.h> 21fcaf7f86SDimitry Andric # include <limits.h> 22fcaf7f86SDimitry Andric # include <procfs.h> 23fcaf7f86SDimitry Andric 2468d75effSDimitry Andric # include "sanitizer_common.h" 2568d75effSDimitry Andric # include "sanitizer_procmaps.h" 2668d75effSDimitry Andric 2768d75effSDimitry Andric namespace __sanitizer { 2868d75effSDimitry Andric 2968d75effSDimitry Andric void ReadProcMaps(ProcSelfMapsBuff *proc_maps) { 30fcaf7f86SDimitry Andric uptr fd = internal_open("/proc/self/xmap", O_RDONLY); 31fcaf7f86SDimitry Andric CHECK_NE(fd, -1); 32fcaf7f86SDimitry Andric uptr Size = internal_filesize(fd); 33fcaf7f86SDimitry Andric CHECK_GT(Size, 0); 34fcaf7f86SDimitry Andric 35fcaf7f86SDimitry Andric // Allow for additional entries by following mmap. 36fcaf7f86SDimitry Andric size_t MmapedSize = Size * 4 / 3; 37fcaf7f86SDimitry Andric void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()"); 38fcaf7f86SDimitry Andric Size = internal_read(fd, VmMap, MmapedSize); 39fcaf7f86SDimitry Andric CHECK_NE(Size, -1); 40fcaf7f86SDimitry Andric internal_close(fd); 41fcaf7f86SDimitry Andric proc_maps->data = (char *)VmMap; 42fcaf7f86SDimitry Andric proc_maps->mmaped_size = MmapedSize; 43fcaf7f86SDimitry Andric proc_maps->len = Size; 4468d75effSDimitry Andric } 4568d75effSDimitry Andric 4668d75effSDimitry Andric bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) { 4768d75effSDimitry Andric if (Error()) return false; // simulate empty maps 4868d75effSDimitry Andric char *last = data_.proc_self_maps.data + data_.proc_self_maps.len; 4968d75effSDimitry Andric if (data_.current >= last) return false; 5068d75effSDimitry Andric 51e8d8bef9SDimitry Andric prxmap_t *xmapentry = 52e8d8bef9SDimitry Andric const_cast<prxmap_t *>(reinterpret_cast<const prxmap_t *>(data_.current)); 5368d75effSDimitry Andric 5468d75effSDimitry Andric segment->start = (uptr)xmapentry->pr_vaddr; 5568d75effSDimitry Andric segment->end = (uptr)(xmapentry->pr_vaddr + xmapentry->pr_size); 5668d75effSDimitry Andric segment->offset = (uptr)xmapentry->pr_offset; 5768d75effSDimitry Andric 5868d75effSDimitry Andric segment->protection = 0; 5968d75effSDimitry Andric if ((xmapentry->pr_mflags & MA_READ) != 0) 6068d75effSDimitry Andric segment->protection |= kProtectionRead; 6168d75effSDimitry Andric if ((xmapentry->pr_mflags & MA_WRITE) != 0) 6268d75effSDimitry Andric segment->protection |= kProtectionWrite; 6368d75effSDimitry Andric if ((xmapentry->pr_mflags & MA_EXEC) != 0) 6468d75effSDimitry Andric segment->protection |= kProtectionExecute; 65fcaf7f86SDimitry Andric if ((xmapentry->pr_mflags & MA_SHARED) != 0) 66fcaf7f86SDimitry Andric segment->protection |= kProtectionShared; 6768d75effSDimitry Andric 6868d75effSDimitry Andric if (segment->filename != NULL && segment->filename_size > 0) { 6968d75effSDimitry Andric char proc_path[PATH_MAX + 1]; 7068d75effSDimitry Andric 71fcaf7f86SDimitry Andric // Avoid unnecessary readlink on unnamed entires. 72fcaf7f86SDimitry Andric if (xmapentry->pr_mapname[0] == '\0') 73fcaf7f86SDimitry Andric segment->filename[0] = '\0'; 74fcaf7f86SDimitry Andric else { 7568d75effSDimitry Andric internal_snprintf(proc_path, sizeof(proc_path), "/proc/self/path/%s", 7668d75effSDimitry Andric xmapentry->pr_mapname); 77349cc55cSDimitry Andric ssize_t sz = internal_readlink(proc_path, segment->filename, 78349cc55cSDimitry Andric segment->filename_size - 1); 79349cc55cSDimitry Andric 80349cc55cSDimitry Andric // If readlink failed, the map is anonymous. 81fcaf7f86SDimitry Andric if (sz == -1) 82349cc55cSDimitry Andric segment->filename[0] = '\0'; 83fcaf7f86SDimitry Andric else if ((size_t)sz < segment->filename_size) 84349cc55cSDimitry Andric // readlink doesn't NUL-terminate. 85349cc55cSDimitry Andric segment->filename[sz] = '\0'; 8668d75effSDimitry Andric } 87fcaf7f86SDimitry Andric } 8868d75effSDimitry Andric 8968d75effSDimitry Andric data_.current += sizeof(prxmap_t); 9068d75effSDimitry Andric 9168d75effSDimitry Andric return true; 9268d75effSDimitry Andric } 9368d75effSDimitry Andric 9468d75effSDimitry Andric } // namespace __sanitizer 9568d75effSDimitry Andric 9668d75effSDimitry Andric #endif // SANITIZER_SOLARIS 97