Change remaining slow path throw entrypoints to save everything.
Change DivZeroCheck, BoundsCheck and explicit NullCheck
slow path entrypoints to conform to kSaveEverything.
On Nexus 9, AOSP ToT, the boot.oat size reduction is
prebuilt multi-part boot image:
- 32-bit boot.oat: -12KiB (-0.04%)
- 64-bit boot.oat: -24KiB (-0.06%)
on-device built single boot image:
- 32-bit boot.oat: -8KiB (-0.03%)
- 64-bit boot.oat: -16KiB (-0.04%)
Test: Run ART test suite including gcstress on host and Nexus 9.
Test: Manually disable implicit null checks and test as above.
Change-Id: If82a8082ea9ae571c5d03b5e545e67fcefafb163
diff --git a/runtime/arch/mips/fault_handler_mips.cc b/runtime/arch/mips/fault_handler_mips.cc
index b6a63ca..1792f31 100644
--- a/runtime/arch/mips/fault_handler_mips.cc
+++ b/runtime/arch/mips/fault_handler_mips.cc
@@ -90,7 +90,7 @@
sc->sc_regs[mips::RA] = sc->sc_pc + 4; // RA needs to point to gc map location
sc->sc_pc = reinterpret_cast<uintptr_t>(art_quick_throw_null_pointer_exception_from_signal);
- sc->sc_regs[mips::T9] = sc->sc_pc; // make sure T9 points to the function
+ // Note: This entrypoint does not rely on T9 pointing to it, so we may as well preserve T9.
VLOG(signals) << "Generating null pointer exception";
return true;
}