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src/hotspot/cpu/arm/macroAssembler_arm.cpp
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rev 52777 : 8214512: ARM32: Jtreg test compiler/c2/Test8062950.java fails on ARM
Summary: fix assertion failures with -XX:-OptoBiasInlining
Reviewed-by: duke
Contributed-by: nick.gasson@arm.com
@@ -1969,11 +1969,11 @@
return bs->resolve(this, decorators, obj);
}
#ifdef COMPILER2
-void MacroAssembler::fast_lock(Register Roop, Register Rbox, Register Rscratch, Register Rscratch2)
+void MacroAssembler::fast_lock(Register Roop, Register Rbox, Register Rscratch, Register Rscratch2, Register scratch3)
{
assert(VM_Version::supports_ldrex(), "unsupported, yet?");
Register Rmark = Rscratch2;
@@ -1983,15 +1983,17 @@
assert(Rbox != Rmark, "");
Label fast_lock, done;
if (UseBiasedLocking && !UseOptoBiasInlining) {
- Label failed;
- biased_locking_enter(Roop, Rmark, Rscratch, false, noreg, done, failed);
- bind(failed);
+ assert(scratch3 != noreg, "need extra temporary for -XX:-UseOptoBiasInlining");
+ biased_locking_enter(Roop, Rmark, Rscratch, false, scratch3, done, done);
+ // Fall through if lock not biased otherwise branch to done
}
+ // Invariant: Rmark loaded below does not contain biased lock pattern
+
ldr(Rmark, Address(Roop, oopDesc::mark_offset_in_bytes()));
tst(Rmark, markOopDesc::unlocked_value);
b(fast_lock, ne);
// Check for recursive lock
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