ART: Single-frame deopt
Add deoptimization of a single frame. Works by removing the managed
code frame and jumping into the quick-to-interpreter bridge, and
the bridge understanding a stored ShadowFrame.
We need a separate fixup pass. For x86, we leave the return address
on the stack so we don't need to push it there.
Bug: 21611912
Change-Id: I06625685ced8b054244f8685ab50b238a705b9d2
diff --git a/runtime/arch/mips64/context_mips64.h b/runtime/arch/mips64/context_mips64.h
index 26fbcfe..84b1c9b 100644
--- a/runtime/arch/mips64/context_mips64.h
+++ b/runtime/arch/mips64/context_mips64.h
@@ -78,14 +78,20 @@
void SmashCallerSaves() OVERRIDE;
NO_RETURN void DoLongJump() OVERRIDE;
+ void SetArg0(uintptr_t new_arg0_value) OVERRIDE {
+ SetGPR(A0, new_arg0_value);
+ }
+
private:
// Pointers to registers in the stack, initialized to null except for the special cases below.
uintptr_t* gprs_[kNumberOfGpuRegisters];
uint64_t* fprs_[kNumberOfFpuRegisters];
// Hold values for sp and t9 if they are not located within a stack frame. We use t9 for the
- // PC (as ra is required to be valid for single-frame deopt and must not be clobbered).
- uintptr_t sp_, t9_;
+ // PC (as ra is required to be valid for single-frame deopt and must not be clobbered). We
+ // also need the first argument for single-frame deopt.
+ uintptr_t sp_, t9_, arg0_;
};
+
} // namespace mips64
} // namespace art