1276789Sdim//===-- sanitizer_procmaps_freebsd.cc -------------------------------------===// 2276789Sdim// 3276789Sdim// The LLVM Compiler Infrastructure 4276789Sdim// 5276789Sdim// This file is distributed under the University of Illinois Open Source 6276789Sdim// License. See LICENSE.TXT for details. 7276789Sdim// 8276789Sdim//===----------------------------------------------------------------------===// 9276789Sdim// 10276789Sdim// Information about the process mappings (FreeBSD-specific parts). 11276789Sdim//===----------------------------------------------------------------------===// 12276789Sdim 13276789Sdim#include "sanitizer_platform.h" 14276789Sdim#if SANITIZER_FREEBSD 15276789Sdim#include "sanitizer_common.h" 16276789Sdim#include "sanitizer_freebsd.h" 17276789Sdim#include "sanitizer_procmaps.h" 18276789Sdim 19276789Sdim#include <unistd.h> 20276789Sdim#include <sys/sysctl.h> 21276789Sdim#include <sys/user.h> 22276789Sdim 23276789Sdim// Fix 'kinfo_vmentry' definition on FreeBSD prior v9.2 in 32-bit mode. 24276789Sdim#if SANITIZER_FREEBSD && (SANITIZER_WORDSIZE == 32) 25276789Sdim# include <osreldate.h> 26276789Sdim# if __FreeBSD_version <= 902001 // v9.2 27276789Sdim# define kinfo_vmentry xkinfo_vmentry 28276789Sdim# endif 29276789Sdim#endif 30276789Sdim 31276789Sdimnamespace __sanitizer { 32276789Sdim 33276789Sdimvoid ReadProcMaps(ProcSelfMapsBuff *proc_maps) { 34276789Sdim const int Mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid() }; 35276789Sdim size_t Size = 0; 36276789Sdim int Err = sysctl(Mib, 4, NULL, &Size, NULL, 0); 37276789Sdim CHECK_EQ(Err, 0); 38276789Sdim CHECK_GT(Size, 0); 39276789Sdim 40276789Sdim size_t MmapedSize = Size * 4 / 3; 41276789Sdim void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()"); 42276789Sdim Size = MmapedSize; 43276789Sdim Err = sysctl(Mib, 4, VmMap, &Size, NULL, 0); 44276789Sdim CHECK_EQ(Err, 0); 45276789Sdim 46276789Sdim proc_maps->data = (char*)VmMap; 47276789Sdim proc_maps->mmaped_size = MmapedSize; 48276789Sdim proc_maps->len = Size; 49276789Sdim} 50276789Sdim 51276789Sdimbool MemoryMappingLayout::Next(uptr *start, uptr *end, uptr *offset, 52276789Sdim char filename[], uptr filename_size, 53276789Sdim uptr *protection) { 54276789Sdim char *last = proc_self_maps_.data + proc_self_maps_.len; 55276789Sdim if (current_ >= last) return false; 56276789Sdim uptr dummy; 57276789Sdim if (!start) start = &dummy; 58276789Sdim if (!end) end = &dummy; 59276789Sdim if (!offset) offset = &dummy; 60276789Sdim if (!protection) protection = &dummy; 61276789Sdim struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry*)current_; 62276789Sdim 63276789Sdim *start = (uptr)VmEntry->kve_start; 64276789Sdim *end = (uptr)VmEntry->kve_end; 65276789Sdim *offset = (uptr)VmEntry->kve_offset; 66276789Sdim 67276789Sdim *protection = 0; 68276789Sdim if ((VmEntry->kve_protection & KVME_PROT_READ) != 0) 69276789Sdim *protection |= kProtectionRead; 70276789Sdim if ((VmEntry->kve_protection & KVME_PROT_WRITE) != 0) 71276789Sdim *protection |= kProtectionWrite; 72276789Sdim if ((VmEntry->kve_protection & KVME_PROT_EXEC) != 0) 73276789Sdim *protection |= kProtectionExecute; 74276789Sdim 75276789Sdim if (filename != NULL && filename_size > 0) { 76276789Sdim internal_snprintf(filename, 77276789Sdim Min(filename_size, (uptr)PATH_MAX), 78276789Sdim "%s", VmEntry->kve_path); 79276789Sdim } 80276789Sdim 81276789Sdim current_ += VmEntry->kve_structsize; 82276789Sdim 83276789Sdim return true; 84276789Sdim} 85276789Sdim 86276789Sdim} // namespace __sanitizer 87276789Sdim 88276789Sdim#endif // SANITIZER_FREEBSD 89