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6943485: JVMTI always on capabilities change code generation too much

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Reviewed-by: twisti, dcubed
This commit is contained in:
Tom Rodriguez 2010-04-26 23:59:45 -07:00
parent cd48f31efe
commit eb534d777a
15 changed files with 20 additions and 54 deletions
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11
hotspot/src/share/vm/opto/graphKit.cpp
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@ -812,10 +812,6 @@ void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) {
JVMState* youngest_jvms = sync_jvms();
// Do we need debug info here? If it is a SafePoint and this method
// cannot de-opt, then we do NOT need any debug info.
bool full_info = (C->deopt_happens() || call->Opcode() != Op_SafePoint);
// If we are guaranteed to throw, we can prune everything but the
// input to the current bytecode.
bool can_prune_locals = false;
@ -829,10 +825,9 @@ void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) {
}
}
if (env()->jvmti_can_examine_or_deopt_anywhere()) {
if (env()->jvmti_can_access_local_variables()) {
// At any safepoint, this method can get breakpointed, which would
// then require an immediate deoptimization.
full_info = true;
can_prune_locals = false; // do not prune locals
stack_slots_not_pruned = 0;
}
@ -890,7 +885,7 @@ void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) {
k = in_jvms->locoff();
l = in_jvms->loc_size();
out_jvms->set_locoff(p);
if (full_info && !can_prune_locals) {
if (!can_prune_locals) {
for (j = 0; j < l; j++)
call->set_req(p++, in_map->in(k+j));
} else {
@ -901,7 +896,7 @@ void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) {
k = in_jvms->stkoff();
l = in_jvms->sp();
out_jvms->set_stkoff(p);
if (full_info && !can_prune_locals) {
if (!can_prune_locals) {
for (j = 0; j < l; j++)
call->set_req(p++, in_map->in(k+j));
} else if (can_prune_locals && stack_slots_not_pruned != 0) {