77d0627c24
The latest libsanitizer import broke Solaris 11.3 bootstrap again, due to an oversight of mine. A fix has been committed upstream https://reviews.llvm.org/D133556 This patch cherry-picks it. Tested on Solaris 11.3 and 11.4, SPARC and x86. 2022-09-23 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> libsanitizer: PR sanitizer/105531 * sanitizer_common/sanitizer_procmaps_solaris.cpp: Cherry-pick llvm-project revision 1cd4d63fb9ab0f04c7151911dde0d58b673823de.
92 lines
3 KiB
C++
92 lines
3 KiB
C++
//===-- sanitizer_procmaps_solaris.cpp ------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Information about the process mappings (Solaris-specific parts).
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//===----------------------------------------------------------------------===//
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// Before Solaris 11.4, <procfs.h> doesn't work in a largefile environment.
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#undef _FILE_OFFSET_BITS
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#include "sanitizer_platform.h"
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#if SANITIZER_SOLARIS
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# include <fcntl.h>
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# include <limits.h>
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# include <procfs.h>
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# include "sanitizer_common.h"
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# include "sanitizer_procmaps.h"
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namespace __sanitizer {
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void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
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uptr fd = internal_open("/proc/self/xmap", O_RDONLY);
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CHECK_NE(fd, -1);
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uptr Size = internal_filesize(fd);
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CHECK_GT(Size, 0);
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// Allow for additional entries by following mmap.
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size_t MmapedSize = Size * 4 / 3;
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void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
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Size = internal_read(fd, VmMap, MmapedSize);
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CHECK_NE(Size, -1);
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internal_close(fd);
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proc_maps->data = (char *)VmMap;
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proc_maps->mmaped_size = MmapedSize;
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proc_maps->len = Size;
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}
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bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
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if (Error()) return false; // simulate empty maps
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char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
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if (data_.current >= last) return false;
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prxmap_t *xmapentry =
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const_cast<prxmap_t *>(reinterpret_cast<const prxmap_t *>(data_.current));
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segment->start = (uptr)xmapentry->pr_vaddr;
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segment->end = (uptr)(xmapentry->pr_vaddr + xmapentry->pr_size);
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segment->offset = (uptr)xmapentry->pr_offset;
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segment->protection = 0;
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if ((xmapentry->pr_mflags & MA_READ) != 0)
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segment->protection |= kProtectionRead;
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if ((xmapentry->pr_mflags & MA_WRITE) != 0)
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segment->protection |= kProtectionWrite;
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if ((xmapentry->pr_mflags & MA_EXEC) != 0)
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segment->protection |= kProtectionExecute;
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if ((xmapentry->pr_mflags & MA_SHARED) != 0)
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segment->protection |= kProtectionShared;
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if (segment->filename != NULL && segment->filename_size > 0) {
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char proc_path[PATH_MAX + 1];
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// Avoid unnecessary readlink on unnamed entires.
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if (xmapentry->pr_mapname[0] == '\0')
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segment->filename[0] = '\0';
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else {
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internal_snprintf(proc_path, sizeof(proc_path), "/proc/self/path/%s",
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xmapentry->pr_mapname);
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ssize_t sz = internal_readlink(proc_path, segment->filename,
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segment->filename_size - 1);
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// If readlink failed, the map is anonymous.
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if (sz == -1)
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segment->filename[0] = '\0';
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else if ((size_t)sz < segment->filename_size)
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// readlink doesn't NUL-terminate.
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segment->filename[sz] = '\0';
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}
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}
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data_.current += sizeof(prxmap_t);
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return true;
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}
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} // namespace __sanitizer
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#endif // SANITIZER_SOLARIS
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