Fix a crash related to ElfParser::loadSymbolTable (#191) (#192)

Author: yanglong1010

ddprof-lib/src/main/cpp/symbols_linux.cpp

@@ -353,14 +353,11 @@ void ElfParser::loadSymbolTable(const char *symbols, size_t total_size,
        symbols += ent_size) {
     ElfSymbol *sym = (ElfSymbol *)symbols;
     if (sym->st_name != 0 && sym->st_value != 0) {
-      // sanity check the offsets not to exceed the file size
-      if (_length == 0 || (sym->st_name < _length && sym->st_value < _length)) {
-        // Skip special AArch64 mapping symbols: $x and $d
-        if (sym->st_size != 0 || sym->st_info != 0 ||
-            strings[sym->st_name] != '$') {
-          _cc->add(_base + sym->st_value, (int)sym->st_size,
-                   strings + sym->st_name);
-        }
+      // Skip special AArch64 mapping symbols: $x and $d
+      if (sym->st_size != 0 || sym->st_info != 0 ||
+          strings[sym->st_name] != '$') {
+        _cc->add(_base + sym->st_value, (int)sym->st_size,
+                 strings + sym->st_name);
       }
     }
   }