1 files changed, 139 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_procmaps_bsd.cpp b/lib/sanitizer_common/sanitizer_procmaps_bsd.cpp
new file mode 100644
index 0000000000000..02ff7c0e91a86
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_procmaps_bsd.cpp
@@ -0,0 +1,139 @@
+//===-- sanitizer_procmaps_bsd.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
+// (FreeBSD, OpenBSD and NetBSD-specific parts).
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_platform.h"
+#if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_OPENBSD
+#include "sanitizer_common.h"
+#if SANITIZER_FREEBSD
+#include "sanitizer_freebsd.h"
+#endif
+#include "sanitizer_procmaps.h"
+
+// clang-format off
+#include <sys/types.h>
+#include <sys/sysctl.h>
+// clang-format on
+#include <unistd.h>
+#if SANITIZER_FREEBSD
+#include <sys/user.h>
+#endif
+
+#include <limits.h>
+#if SANITIZER_OPENBSD
+#define KVME_PROT_READ KVE_PROT_READ
+#define KVME_PROT_WRITE KVE_PROT_WRITE
+#define KVME_PROT_EXEC KVE_PROT_EXEC
+#endif
+
+// Fix 'kinfo_vmentry' definition on FreeBSD prior v9.2 in 32-bit mode.
+#if SANITIZER_FREEBSD && (SANITIZER_WORDSIZE == 32)
+#include <osreldate.h>
+#if __FreeBSD_version <= 902001 // v9.2
+#define kinfo_vmentry xkinfo_vmentry
+#endif
+#endif
+
+namespace __sanitizer {
+
+void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
+  const int Mib[] = {
+#if SANITIZER_FREEBSD
+    CTL_KERN,
+    KERN_PROC,
+    KERN_PROC_VMMAP,
+    getpid()
+#elif SANITIZER_OPENBSD
+    CTL_KERN,
+    KERN_PROC_VMMAP,
+    getpid()
+#elif SANITIZER_NETBSD
+    CTL_VM,
+    VM_PROC,
+    VM_PROC_MAP,
+    getpid(),
+    sizeof(struct kinfo_vmentry)
+#else
+#error "not supported"
+#endif
+  };
+
+  uptr Size = 0;
+  int Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), NULL, &Size, NULL, 0);
+  CHECK_EQ(Err, 0);
+  CHECK_GT(Size, 0);
+
+#if !SANITIZER_OPENBSD
+  size_t MmapedSize = Size * 4 / 3;
+  void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
+  Size = MmapedSize;
+  Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), VmMap, &Size, NULL, 0);
+  CHECK_EQ(Err, 0);
+  proc_maps->data = (char *)VmMap;
+#else
+  size_t PageSize = GetPageSize();
+  size_t MmapedSize = Size;
+  MmapedSize = ((MmapedSize - 1) / PageSize + 1) * PageSize;
+  char *Mem = (char *)MmapOrDie(MmapedSize, "ReadProcMaps()");
+  Size = 2 * Size + 10 * sizeof(struct kinfo_vmentry);
+  if (Size > 0x10000)
+    Size = 0x10000;
+  Size = (Size / sizeof(struct kinfo_vmentry)) * sizeof(struct kinfo_vmentry);
+  Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), Mem, &Size, NULL, 0);
+  CHECK_EQ(Err, 0);
+  MmapedSize = Size;
+  proc_maps->data = Mem;
+#endif
+
+  proc_maps->mmaped_size = MmapedSize;
+  proc_maps->len = Size;
+}
+
+bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
+  CHECK(!Error()); // can not fail
+  char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
+  if (data_.current >= last)
+    return false;
+  const struct kinfo_vmentry *VmEntry =
+      (const struct kinfo_vmentry *)data_.current;
+
+  segment->start = (uptr)VmEntry->kve_start;
+  segment->end = (uptr)VmEntry->kve_end;
+  segment->offset = (uptr)VmEntry->kve_offset;
+
+  segment->protection = 0;
+  if ((VmEntry->kve_protection & KVME_PROT_READ) != 0)
+    segment->protection |= kProtectionRead;
+  if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0)
+    segment->protection |= kProtectionWrite;
+  if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0)
+    segment->protection |= kProtectionExecute;
+
+#if !SANITIZER_OPENBSD
+  if (segment->filename != NULL && segment->filename_size > 0) {
+    internal_snprintf(segment->filename,
+                      Min(segment->filename_size, (uptr)PATH_MAX), "%s",
+                      VmEntry->kve_path);
+  }
+#endif
+
+#if SANITIZER_FREEBSD
+  data_.current += VmEntry->kve_structsize;
+#else
+  data_.current += sizeof(*VmEntry);
+#endif
+
+  return true;
+}
+
+} // namespace __sanitizer
+
+#endif