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7000578: CMS: assert(SafepointSynchronize::is_at_safepoint()) failed: Else races are possible

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Weakened assert in onj_is_alive() to allow its use at initialization time when is_at_safepoint() normally reports false; added some related asserts to check order of is_init_completed() after Universe::is_fully_initialized().

Reviewed-by: jcoomes
This commit is contained in:
Y. Srinivas Ramakrishna 2010-11-16 13:58:48 -08:00
parent fbe476856f
commit 9af444d011
4 changed files with 5 additions and 1 deletions
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3
hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp
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@ -1093,8 +1093,9 @@ bool CompactibleFreeListSpace::block_is_obj(const HeapWord* p) const {
// perm_gen_verify_bit_map where we store the "deadness" information if
// we did not sweep the perm gen in the most recent previous GC cycle.
bool CompactibleFreeListSpace::obj_is_alive(const HeapWord* p) const {
assert(SafepointSynchronize::is_at_safepoint() || !is_init_completed(),
"Else races are possible");
assert(block_is_obj(p), "The address should point to an object");
assert(SafepointSynchronize::is_at_safepoint(), "Else races are possible");
// If we're sweeping, we use object liveness information from the main bit map
// for both perm gen and old gen.

1
hotspot/src/share/vm/includeDB_core
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@ -4454,6 +4454,7 @@ universe.cpp genRemSet.hpp
universe.cpp generation.hpp
universe.cpp handles.inline.hpp
universe.cpp hashtable.inline.hpp
universe.cpp init.hpp
universe.cpp instanceKlass.hpp
universe.cpp instanceKlassKlass.hpp
universe.cpp instanceRefKlass.hpp

1
hotspot/src/share/vm/memory/universe.cpp
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@ -945,6 +945,7 @@ void universe2_init() {
extern void initialize_converter_functions();
bool universe_post_init() {
assert(!is_init_completed(), "Error: initialization not yet completed!");
Universe::_fully_initialized = true;
EXCEPTION_MARK;
{ ResourceMark rm;

1
hotspot/src/share/vm/runtime/init.cpp
View file

@ -160,5 +160,6 @@ bool is_init_completed() {
void set_init_completed() {
assert(Universe::is_fully_initialized(), "Should have completed initialization");
_init_completed = true;
}