Retro68/gcc/libsanitizer/sanitizer_common/sanitizer_procmaps_freebsd.cc
2015-08-28 17:33:40 +02:00

87 lines
2.6 KiB
C++

//===-- sanitizer_procmaps_freebsd.cc -------------------------------------===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Information about the process mappings (FreeBSD-specific parts).
//===----------------------------------------------------------------------===//
#include "sanitizer_platform.h"
#if SANITIZER_FREEBSD
#include "sanitizer_common.h"
#include "sanitizer_freebsd.h"
#include "sanitizer_procmaps.h"
#include <unistd.h>
#include <sys/sysctl.h>
#include <sys/user.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[4] = { CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid() };
size_t Size = 0;
int Err = sysctl(Mib, 4, 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 = sysctl(Mib, 4, 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(uptr *start, uptr *end, uptr *offset,
char filename[], uptr filename_size,
uptr *protection) {
char *last = proc_self_maps_.data + proc_self_maps_.len;
if (current_ >= last) return false;
uptr dummy;
if (!start) start = &dummy;
if (!end) end = &dummy;
if (!offset) offset = &dummy;
if (!protection) protection = &dummy;
struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry*)current_;
*start = (uptr)VmEntry->kve_start;
*end = (uptr)VmEntry->kve_end;
*offset = (uptr)VmEntry->kve_offset;
*protection = 0;
if ((VmEntry->kve_protection & KVME_PROT_READ) != 0)
*protection |= kProtectionRead;
if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0)
*protection |= kProtectionWrite;
if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0)
*protection |= kProtectionExecute;
if (filename != NULL && filename_size > 0) {
internal_snprintf(filename,
Min(filename_size, (uptr)PATH_MAX),
"%s", VmEntry->kve_path);
}
current_ += VmEntry->kve_structsize;
return true;
}
} // namespace __sanitizer
#endif // SANITIZER_FREEBSD