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6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?")

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Fix block_size_if_printezis_bits() so it does not expect the bits, only uses them when available. Fix block_size_no_stall() so it does not stall when the bits are missing such cases, letting the caller deal with zero size returns. Constant pool cache oops do not need to be unparsable or conc_unsafe after their klass pointer is installed. Some cosmetic clean-ups and some assertion checking for conc-usafety which, in the presence of class file redefinition, has no a-priori time boundedness, so all GCs must be able to safely deal with putatively conc-unsafe objects in a stop-world pause.

Reviewed-by: jmasa, johnc
This commit is contained in:
Y. Srinivas Ramakrishna 2011-02-07 22:19:57 -08:00
parent 60418bbde3
commit 7eccb460db
16 changed files with 67 additions and 76 deletions
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8
hotspot/src/share/vm/prims/methodHandleWalk.cpp
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@ -1134,8 +1134,9 @@ int MethodHandleCompiler::cpool_primitive_put(BasicType bt, jvalue* con) {
constantPoolHandle MethodHandleCompiler::get_constant_pool(TRAPS) const {
constantPoolHandle nullHandle;
bool is_conc_safe = true;
constantPoolOop cpool_oop = oopFactory::new_constantPool(_constants.length(), is_conc_safe, CHECK_(nullHandle));
constantPoolOop cpool_oop = oopFactory::new_constantPool(_constants.length(),
oopDesc::IsSafeConc,
CHECK_(nullHandle));
constantPoolHandle cpool(THREAD, cpool_oop);
// Fill the real constant pool skipping the zero element.
@ -1180,10 +1181,9 @@ methodHandle MethodHandleCompiler::get_method_oop(TRAPS) const {
else
flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC);
bool is_conc_safe = true;
methodOop m_oop = oopFactory::new_method(bytecode_length(),
accessFlags_from(flags_bits),
0, 0, 0, is_conc_safe, CHECK_(nullHandle));
0, 0, 0, oopDesc::IsSafeConc, CHECK_(nullHandle));
methodHandle m(THREAD, m_oop);
m_oop = NULL; // oop not GC safe