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7028374: race in fix_oop_relocations for scavengeable nmethods

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Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2011-03-18 15:52:42 -07:00
parent 0317c7c485
commit f5ef48f3b9
11 changed files with 115 additions and 13 deletions
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16
hotspot/src/cpu/sparc/vm/nativeInst_sparc.cpp
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@ -52,6 +52,22 @@ void NativeInstruction::set_data64_sethi(address instaddr, intptr_t x) {
ICache::invalidate_range(instaddr, 7 * BytesPerInstWord);
}
void NativeInstruction::verify_data64_sethi(address instaddr, intptr_t x) {
ResourceMark rm;
unsigned char buffer[10 * BytesPerInstWord];
CodeBuffer buf(buffer, 10 * BytesPerInstWord);
MacroAssembler masm(&buf);
Register destreg = inv_rd(*(unsigned int *)instaddr);
// Generate the proper sequence into a temporary buffer and compare
// it with the original sequence.
masm.patchable_sethi(x, destreg);
int len = buffer - masm.pc();
for (int i = 0; i < len; i++) {
assert(instaddr[i] == buffer[i], "instructions must match");
}
}
void NativeInstruction::verify() {
// make sure code pattern is actually an instruction address
address addr = addr_at(0);