Add suspend checks to special methods.
Generate suspend checks at the beginning of special methods.
If we need to call to runtime, go to the slow path where we
create a simplified but valid frame, spill all arguments,
call art_quick_test_suspend, restore necessary arguments and
return back to the fast path. This keeps the fast path
overhead to a minimum.
Bug: 19245639
Change-Id: I3de5aee783943941322a49c4cf2c4c94411dbaa2
diff --git a/compiler/dex/quick/mips/call_mips.cc b/compiler/dex/quick/mips/call_mips.cc
index 0719b52..d9471f6 100644
--- a/compiler/dex/quick/mips/call_mips.cc
+++ b/compiler/dex/quick/mips/call_mips.cc
@@ -315,6 +315,26 @@
OpReg(kOpBx, rs_rRA);
}
+void MipsMir2Lir::GenSpecialEntryForSuspend() {
+ // Keep 16-byte stack alignment - push A0, i.e. ArtMethod*, 2 filler words and RA.
+ core_spill_mask_ = (1u << rs_rRA.GetRegNum());
+ num_core_spills_ = 1u;
+ fp_spill_mask_ = 0u;
+ num_fp_spills_ = 0u;
+ frame_size_ = 16u;
+ core_vmap_table_.clear();
+ fp_vmap_table_.clear();
+ OpRegImm(kOpSub, rs_rMIPS_SP, frame_size_);
+ Store32Disp(rs_rMIPS_SP, frame_size_ - 4, rs_rRA);
+ Store32Disp(rs_rMIPS_SP, 0, rs_rA0);
+}
+
+void MipsMir2Lir::GenSpecialExitForSuspend() {
+ // Pop the frame. Don't pop ArtMethod*, it's no longer needed.
+ Load32Disp(rs_rMIPS_SP, frame_size_ - 4, rs_rRA);
+ OpRegImm(kOpAdd, rs_rMIPS_SP, frame_size_);
+}
+
/*
* Bit of a hack here - in the absence of a real scheduling pass,
* emit the next instruction in static & direct invoke sequences.