forked from OSchip/llvm-project
113 lines
3.0 KiB
C++
113 lines
3.0 KiB
C++
//===-- 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 and NetBSD-specific parts).
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "sanitizer_platform.h"
|
|
#if SANITIZER_FREEBSD || SANITIZER_NETBSD
|
|
#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>
|
|
|
|
// 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_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);
|
|
|
|
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;
|
|
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 (segment->filename != NULL && segment->filename_size > 0) {
|
|
internal_snprintf(segment->filename,
|
|
Min(segment->filename_size, (uptr)PATH_MAX), "%s",
|
|
VmEntry->kve_path);
|
|
}
|
|
|
|
#if SANITIZER_FREEBSD
|
|
data_.current += VmEntry->kve_structsize;
|
|
#else
|
|
data_.current += sizeof(*VmEntry);
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace __sanitizer
|
|
|
|
#endif
|