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6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot

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Developed a reexecute logic for the interpreter to reexecute the bytecode when deopt happens

Reviewed-by: kvn, never, jrose, twisti
This commit is contained in:
Changpeng Fang 2009-07-31 17:12:33 -07:00
parent f2ea22a547
commit ae00753bf7
29 changed files with 465 additions and 241 deletions
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11
hotspot/src/share/vm/c1/c1_IR.hpp
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@ -239,15 +239,20 @@ class IRScopeDebugInfo: public CompilationResourceObj {
GrowableArray<MonitorValue*>* monitors() { return _monitors; }
IRScopeDebugInfo* caller() { return _caller; }
void record_debug_info(DebugInformationRecorder* recorder, int pc_offset) {
//Whether we should reexecute this bytecode for deopt
bool should_reexecute();
void record_debug_info(DebugInformationRecorder* recorder, int pc_offset, bool topmost) {
if (caller() != NULL) {
// Order is significant: Must record caller first.
caller()->record_debug_info(recorder, pc_offset);
caller()->record_debug_info(recorder, pc_offset, false/*topmost*/);
}
DebugToken* locvals = recorder->create_scope_values(locals());
DebugToken* expvals = recorder->create_scope_values(expressions());
DebugToken* monvals = recorder->create_monitor_values(monitors());
recorder->describe_scope(pc_offset, scope()->method(), bci(), locvals, expvals, monvals);
// reexecute allowed only for the topmost frame
bool reexecute = topmost ? should_reexecute() : false;
recorder->describe_scope(pc_offset, scope()->method(), bci(), reexecute, locvals, expvals, monvals);
}
};