Changes to support dprof and Observatory profiler UIs

runtime/vm/native_symbol_android.cc

Index: runtime/vm/native_symbol_android.cc
diff --git a/runtime/vm/native_symbol_android.cc b/runtime/vm/native_symbol_android.cc
index 76ee86ffb5e64fbb7e48fb79ca486b9fd96025f5..a5e63fadcde1cb05498dd6ad3ad47d4a25dfe442 100644
--- a/runtime/vm/native_symbol_android.cc
+++ b/runtime/vm/native_symbol_android.cc
@@ -20,7 +20,7 @@ void NativeSymbolResolver::ShutdownOnce() {
 }
 
 
-char* NativeSymbolResolver::LookupSymbolName(uintptr_t pc) {
+char* NativeSymbolResolver::LookupSymbolName(uintptr_t pc, uintptr_t* start) {
   Dl_info info;
   int r = dladdr(reinterpret_cast<void*>(pc), &info);
   if (r == 0) {
@@ -29,6 +29,9 @@ char* NativeSymbolResolver::LookupSymbolName(uintptr_t pc) {
   if (info.dli_sname == NULL) {
     return NULL;
   }
+  if (start != NULL) {
+    *start = reinterpret_cast<uintptr_t>(info.dli_saddr);
+  }
   return strdup(info.dli_sname);
 }