[Sanitizers] GetMemoryProfile implementation for FreeBSD

[devnexen]

ping :)

compiler-rt/lib/sanitizer_common/sanitizer_procmaps_bsd.cpp

 #include <osreldate.h>
 #if __FreeBSD_version <= 902001 // v9.2
 #define kinfo_vmentry xkinfo_vmentry
 #endif
 #endif
 
 namespace __sanitizer {
 
+#if SANITIZER_FREEBSD
+void GetMemoryProfile(fill_profile_f cb, uptr *stats) {
+  const int Mib[] = {
+    CTL_KERN,
+    KERN_PROC,
+    KERN_PROC_PID,
+    getpid()
+  }; 
+
+  struct kinfo_proc InfoProc;
+  uptr Len = sizeof(InfoProc);
+  CHECK_EQ(internal_sysctl(Mib, ARRAY_SIZE(Mib), nullptr, (uptr *)&InfoProc, &Len, 0), 0);
+  cb(0, InfoProc.ki_rssize * GetPageSizeCached(), false, stats);
+}
+#endif
+
 void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
   const int Mib[] = {
 #if SANITIZER_FREEBSD
     CTL_KERN,
     KERN_PROC,
     KERN_PROC_VMMAP,
     getpid()
 #elif SANITIZER_NETBSD

compiler-rt/lib/sanitizer_common/sanitizer_procmaps_common.cpp

for (uptr i = 0; Next(&segment); i++) {
     uptr base_address = (i ? segment.start : 0) - segment.offset;
     LoadedModule cur_module;
     cur_module.set(cur_name, base_address);
     segment.AddAddressRanges(&cur_module);
     modules->push_back(cur_module);
   }
 }
 
+#if SANITIZER_LINUX || SANITIZER_ANDROID || SANITIZER_SOLARIS || SANITIZER_NETBSD
 void GetMemoryProfile(fill_profile_f cb, uptr *stats) {
   char *smaps = nullptr;
   uptr smaps_cap = 0;
   uptr smaps_len = 0;
   if (!ReadFileToBuffer("/proc/self/smaps", &smaps, &smaps_cap, &smaps_len))
     return;
   ParseUnixMemoryProfile(cb, stats, smaps, smaps_len);
   UnmapOrDie(smaps, smaps_cap);
while (pos < end) {
     } else if (internal_strncmp(pos, "Rss:", 4) == 0) {
       while (pos < end && !IsDecimal(*pos)) pos++;
       uptr rss = ParseDecimal(&pos) * 1024;
       cb(start, rss, file, stats);
     }
     while (*pos++ != '\n') {}
   }
 }
+#endif
 
 } // namespace __sanitizer
 
 #endif