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6840152: JVM crashes when heavyweight monitors are used

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Turn off biased locking if !UseFastLocking or UseHeavyMonitors options are requested.

Reviewed-by: phh, never, dcubed, dholmes
This commit is contained in:
Coleen Phillimore 2011-02-16 11:34:44 -05:00
parent 89f51d79cc
commit 9c5679fe53
1 changed files with 13 additions and 0 deletions
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13
hotspot/src/share/vm/runtime/arguments.cpp
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@ -3103,6 +3103,19 @@ jint Arguments::parse(const JavaVMInitArgs* args) {
// Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled.
set_aggressive_opts_flags(); set_aggressive_opts_flags();
// Turn off biased locking for locking debug mode flags,
// which are subtlely different from each other but neither works with
// biased locking.
if (!UseFastLocking || UseHeavyMonitors) {
if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
// flag set to true on command line; warn the user that they
// can't enable biased locking here
warning("Biased Locking is not supported with locking debug flags"
"; ignoring UseBiasedLocking flag." );
}
UseBiasedLocking = false;
}
#ifdef CC_INTERP #ifdef CC_INTERP
// Clear flags not supported by the C++ interpreter // Clear flags not supported by the C++ interpreter
FLAG_SET_DEFAULT(ProfileInterpreter, false); FLAG_SET_DEFAULT(ProfileInterpreter, false);