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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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6
hotspot/src/share/vm/code/scopeDesc.cpp
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@ -46,6 +46,7 @@ ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
_decode_offset = parent->_sender_decode_offset;
_objects = parent->_objects;
decode_body();
assert(_reexecute == false, "reexecute not allowed");
}
@ -56,6 +57,7 @@ void ScopeDesc::decode_body() {
_sender_decode_offset = DebugInformationRecorder::serialized_null;
_method = methodHandle(_code->method());
_bci = InvocationEntryBci;
_reexecute = false;
_locals_decode_offset = DebugInformationRecorder::serialized_null;
_expressions_decode_offset = DebugInformationRecorder::serialized_null;
_monitors_decode_offset = DebugInformationRecorder::serialized_null;
@ -65,7 +67,8 @@ void ScopeDesc::decode_body() {
_sender_decode_offset = stream->read_int();
_method = methodHandle((methodOop) stream->read_oop());
_bci = stream->read_bci();
_bci = stream->read_bci_and_reexecute(_reexecute);
// decode offsets for body and sender
_locals_decode_offset = stream->read_int();
_expressions_decode_offset = stream->read_int();
@ -170,6 +173,7 @@ void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin());
st->print_cr(" offset: %d", _decode_offset);
st->print_cr(" bci: %d", bci());
st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false");
st->print_cr(" locals: %d", _locals_decode_offset);
st->print_cr(" stack: %d", _expressions_decode_offset);
st->print_cr(" monitor: %d", _monitors_decode_offset);