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8003553: NPG: metaspace objects should be zeroed in constructors

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Zero metadata in constructors, not in allocation (and some in constructors)

Reviewed-by: jmasa, sspitsyn
This commit is contained in:
Coleen Phillimore 2013-03-08 11:47:57 -05:00
parent 4cdcd6dc13
commit addd95f165
13 changed files with 111 additions and 97 deletions
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26
hotspot/src/share/vm/oops/methodData.cpp
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@ -652,23 +652,25 @@ MethodData::MethodData(methodHandle method, int size, TRAPS) {
// Set the method back-pointer.
_method = method();
if (TieredCompilation) {
_invocation_counter.init();
_backedge_counter.init();
_invocation_counter_start = 0;
_backedge_counter_start = 0;
_num_loops = 0;
_num_blocks = 0;
_highest_comp_level = 0;
_highest_osr_comp_level = 0;
_would_profile = true;
}
_invocation_counter.init();
_backedge_counter.init();
_invocation_counter_start = 0;
_backedge_counter_start = 0;
_num_loops = 0;
_num_blocks = 0;
_highest_comp_level = 0;
_highest_osr_comp_level = 0;
_would_profile = true;
set_creation_mileage(mileage_of(method()));
// Initialize flags and trap history.
_nof_decompiles = 0;
_nof_overflow_recompiles = 0;
_nof_overflow_traps = 0;
_eflags = 0;
_arg_local = 0;
_arg_stack = 0;
_arg_returned = 0;
assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align");
Copy::zero_to_words((HeapWord*) &_trap_hist,
sizeof(_trap_hist) / sizeof(HeapWord));
@ -677,6 +679,7 @@ MethodData::MethodData(methodHandle method, int size, TRAPS) {
// corresponding data cells.
int data_size = 0;
int empty_bc_count = 0; // number of bytecodes lacking data
_data[0] = 0; // apparently not set below.
BytecodeStream stream(method);
Bytecodes::Code c;
while ((c = stream.next()) >= 0) {
@ -710,6 +713,7 @@ MethodData::MethodData(methodHandle method, int size, TRAPS) {
post_initialize(&stream);
set_size(object_size);
}
// Get a measure of how much mileage the method has on it.