libsanitizer/sanitizer_common/sanitizer_procmaps_solaris.cc

   1 //===-- sanitizer_procmaps_solaris.cc -------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // Information about the process mappings (Solaris-specific parts).
   9 //===----------------------------------------------------------------------===//
  10
  11 #include "sanitizer_platform.h"
  12 #if SANITIZER_SOLARIS
  13 #include "sanitizer_common.h"
  14 #include "sanitizer_procmaps.h"
  15
  16 // Before Solaris 11.4, <procfs.h> doesn't work in a largefile environment.
  17 #undef _FILE_OFFSET_BITS
  18 #include <procfs.h>
  19 #include <limits.h>
  20
  21 namespace __sanitizer {
  22
  23 void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
  24   ReadFileToBuffer("/proc/self/xmap", &proc_maps->data, &proc_maps->mmaped_size,
  25                    &proc_maps->len);
  26 }
  27
  28 bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
  29   char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
  30   if (data_.current >= last) return false;
  31
  32   prxmap_t *xmapentry = (prxmap_t*)data_.current;
  33
  34   segment->start = (uptr)xmapentry->pr_vaddr;
  35   segment->end = (uptr)(xmapentry->pr_vaddr + xmapentry->pr_size);
  36   segment->offset = (uptr)xmapentry->pr_offset;
  37
  38   segment->protection = 0;
  39   if ((xmapentry->pr_mflags & MA_READ) != 0)
  40     segment->protection |= kProtectionRead;
  41   if ((xmapentry->pr_mflags & MA_WRITE) != 0)
  42     segment->protection |= kProtectionWrite;
  43   if ((xmapentry->pr_mflags & MA_EXEC) != 0)
  44     segment->protection |= kProtectionExecute;
  45
  46   if (segment->filename != NULL && segment->filename_size > 0) {
  47     internal_snprintf(segment->filename,
  48                       Min(segment->filename_size, (uptr)PATH_MAX), "%s",
  49                       xmapentry->pr_mapname);
  50   }
  51
  52   data_.current += sizeof(prxmap_t);
  53
  54   return true;
  55 }
  56
  57 }  // namespace __sanitizer
  58
  59 #endif  // SANITIZER_SOLARIS