1 files changed, 96 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_solaris.cpp b/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_solaris.cpp
new file mode 100644
index 000000000000..80b8158f43db
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_procmaps_solaris.cpp
@@ -0,0 +1,96 @@
+//===-- sanitizer_procmaps_solaris.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 (Solaris-specific parts).
+//===----------------------------------------------------------------------===//
+
+// Before Solaris 11.4, <procfs.h> doesn't work in a largefile environment.
+#undef _FILE_OFFSET_BITS
+
+// Avoid conflict between `_TIME_BITS` defined vs. `_FILE_OFFSET_BITS`
+// undefined in some Linux configurations.
+#undef _TIME_BITS
+#include "sanitizer_platform.h"
+#if SANITIZER_SOLARIS
+#  include <fcntl.h>
+#  include <limits.h>
+#  include <procfs.h>
+
+#  include "sanitizer_common.h"
+#  include "sanitizer_procmaps.h"
+
+namespace __sanitizer {
+
+void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
+  uptr fd = internal_open("/proc/self/xmap", O_RDONLY);
+  CHECK_NE(fd, -1);
+  uptr Size = internal_filesize(fd);
+  CHECK_GT(Size, 0);
+
+  // Allow for additional entries by following mmap.
+  size_t MmapedSize = Size * 4 / 3;
+  void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
+  Size = internal_read(fd, VmMap, MmapedSize);
+  CHECK_NE(Size, -1);
+  internal_close(fd);
+  proc_maps->data = (char *)VmMap;
+  proc_maps->mmaped_size = MmapedSize;
+  proc_maps->len = Size;
+}
+
+bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
+  if (Error()) return false; // simulate empty maps
+  char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
+  if (data_.current >= last) return false;
+
+  prxmap_t *xmapentry =
+      const_cast<prxmap_t *>(reinterpret_cast<const prxmap_t *>(data_.current));
+
+  segment->start = (uptr)xmapentry->pr_vaddr;
+  segment->end = (uptr)(xmapentry->pr_vaddr + xmapentry->pr_size);
+  segment->offset = (uptr)xmapentry->pr_offset;
+
+  segment->protection = 0;
+  if ((xmapentry->pr_mflags & MA_READ) != 0)
+    segment->protection |= kProtectionRead;
+  if ((xmapentry->pr_mflags & MA_WRITE) != 0)
+    segment->protection |= kProtectionWrite;
+  if ((xmapentry->pr_mflags & MA_EXEC) != 0)
+    segment->protection |= kProtectionExecute;
+  if ((xmapentry->pr_mflags & MA_SHARED) != 0)
+    segment->protection |= kProtectionShared;
+
+  if (segment->filename != NULL && segment->filename_size > 0) {
+    char proc_path[PATH_MAX + 1];
+
+    // Avoid unnecessary readlink on unnamed entires.
+    if (xmapentry->pr_mapname[0] == '\0')
+      segment->filename[0] = '\0';
+    else {
+      internal_snprintf(proc_path, sizeof(proc_path), "/proc/self/path/%s",
+                        xmapentry->pr_mapname);
+      ssize_t sz = internal_readlink(proc_path, segment->filename,
+                                     segment->filename_size - 1);
+
+      // If readlink failed, the map is anonymous.
+      if (sz == -1)
+        segment->filename[0] = '\0';
+      else if ((size_t)sz < segment->filename_size)
+        // readlink doesn't NUL-terminate.
+        segment->filename[sz] = '\0';
+    }
+  }
+
+  data_.current += sizeof(prxmap_t);
+
+  return true;
+}
+
+}  // namespace __sanitizer
+
+#endif  // SANITIZER_SOLARIS