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      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   if (!ReadFileToBuffer("/proc/self/xmap", &proc_maps->data,
     25                         &proc_maps->mmaped_size, &proc_maps->len)) {
     26     proc_maps->data = nullptr;
     27     proc_maps->mmaped_size = 0;
     28     proc_maps->len = 0;
     29   }
     30 }
     31 
     32 bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
     33   if (Error()) return false; // simulate empty maps
     34   char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
     35   if (data_.current >= last) return false;
     36 
     37   prxmap_t *xmapentry = (prxmap_t*)data_.current;
     38 
     39   segment->start = (uptr)xmapentry->pr_vaddr;
     40   segment->end = (uptr)(xmapentry->pr_vaddr + xmapentry->pr_size);
     41   segment->offset = (uptr)xmapentry->pr_offset;
     42 
     43   segment->protection = 0;
     44   if ((xmapentry->pr_mflags & MA_READ) != 0)
     45     segment->protection |= kProtectionRead;
     46   if ((xmapentry->pr_mflags & MA_WRITE) != 0)
     47     segment->protection |= kProtectionWrite;
     48   if ((xmapentry->pr_mflags & MA_EXEC) != 0)
     49     segment->protection |= kProtectionExecute;
     50 
     51   if (segment->filename != NULL && segment->filename_size > 0) {
     52     internal_snprintf(segment->filename,
     53                       Min(segment->filename_size, (uptr)PATH_MAX), "%s",
     54                       xmapentry->pr_mapname);
     55   }
     56 
     57   data_.current += sizeof(prxmap_t);
     58 
     59   return true;
     60 }
     61 
     62 }  // namespace __sanitizer
     63 
     64 #endif  // SANITIZER_SOLARIS
     65