src/os_cpu/linux_ppc/vm/thread_linux_ppc.cpp

rev 9421 : 8231949: [PPC64, s390]: Make async profiling more reliable
Summary: Better checks if method from interpreter frame is valid.
Reviewed-by: rrich, ghaug, goetz

@@ -49,18 +49,19 @@
       // ucontext wasn't useful
       return false;
     }
 
     if (ret_frame.is_interpreted_frame()) {
-       frame::ijava_state* istate = ret_frame.get_ijava_state();
-       if (!((Method*)(istate->method))->is_metaspace_object()) {
-         return false;
-       }
+      frame::ijava_state *istate = ret_frame.get_ijava_state();
+      const Method *m = (const Method*)(istate->method);
+      if (m == NULL || !m->is_valid_method()) return false;
+      if (!Metaspace::contains((const void*)m)) return false;
+
        uint64_t reg_bcp = uc->uc_mcontext.regs->gpr[14/*R14_bcp*/];
        uint64_t istate_bcp = istate->bcp;
-       uint64_t code_start = (uint64_t)(((Method*)(istate->method))->code_base());
-       uint64_t code_end = (uint64_t)(((Method*)istate->method)->code_base() + ((Method*)istate->method)->code_size());
+      uint64_t code_start = (uint64_t)(m->code_base());
+      uint64_t code_end = (uint64_t)(m->code_base() + m->code_size());
        if (istate_bcp >= code_start && istate_bcp < code_end) {
          // we have a valid bcp, don't touch it, do nothing
        } else if (reg_bcp >= code_start && reg_bcp < code_end) {
          istate->bcp = reg_bcp;
       } else {