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-rw-r--r--lib/sanitizer_common/sanitizer_procmaps_bsd.cpp139
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
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index 000000000000..02ff7c0e91a8
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+++ 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