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87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
//===-- sanitizer_procmaps_freebsd.cc -------------------------------------===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Information about the process mappings (FreeBSD-specific parts).
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//===----------------------------------------------------------------------===//
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#include "sanitizer_platform.h"
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#if SANITIZER_FREEBSD
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#include "sanitizer_common.h"
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#include "sanitizer_freebsd.h"
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#include "sanitizer_procmaps.h"
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#include <unistd.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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// Fix 'kinfo_vmentry' definition on FreeBSD prior v9.2 in 32-bit mode.
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#if SANITIZER_FREEBSD && (SANITIZER_WORDSIZE == 32)
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# include <osreldate.h>
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# if __FreeBSD_version <= 902001 // v9.2
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# define kinfo_vmentry xkinfo_vmentry
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# endif
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#endif
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namespace __sanitizer {
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void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
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const int Mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid() };
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size_t Size = 0;
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int Err = sysctl(Mib, 4, NULL, &Size, NULL, 0);
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CHECK_EQ(Err, 0);
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CHECK_GT(Size, 0);
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size_t MmapedSize = Size * 4 / 3;
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void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
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Size = MmapedSize;
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Err = sysctl(Mib, 4, VmMap, &Size, NULL, 0);
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CHECK_EQ(Err, 0);
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proc_maps->data = (char*)VmMap;
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proc_maps->mmaped_size = MmapedSize;
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proc_maps->len = Size;
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}
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bool MemoryMappingLayout::Next(uptr *start, uptr *end, uptr *offset,
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char filename[], uptr filename_size,
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uptr *protection) {
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char *last = proc_self_maps_.data + proc_self_maps_.len;
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if (current_ >= last) return false;
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uptr dummy;
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if (!start) start = &dummy;
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if (!end) end = &dummy;
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if (!offset) offset = &dummy;
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if (!protection) protection = &dummy;
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struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry*)current_;
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*start = (uptr)VmEntry->kve_start;
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*end = (uptr)VmEntry->kve_end;
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*offset = (uptr)VmEntry->kve_offset;
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*protection = 0;
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if ((VmEntry->kve_protection & KVME_PROT_READ) != 0)
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*protection |= kProtectionRead;
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if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0)
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*protection |= kProtectionWrite;
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if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0)
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*protection |= kProtectionExecute;
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if (filename != NULL && filename_size > 0) {
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internal_snprintf(filename,
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Min(filename_size, (uptr)PATH_MAX),
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"%s", VmEntry->kve_path);
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}
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current_ += VmEntry->kve_structsize;
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return true;
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}
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} // namespace __sanitizer
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#endif // SANITIZER_FREEBSD
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