Fix stack overflow for mutual recursion.
There was an error where we would have a pc that was in the method
which generated the stack overflow. This didn't work however
because the stack overflow check was before we stored the method in
the stack. The result was that the stack overflow handler had a PC
which wasnt necessarily in the method at the top of the stack. This
is now fixed by always restoring the link register before branching
to the throw entrypoint.
Slight code size regression on ARM/Mips (unmeasured). Regression on ARM
is 4 bytes of code per stack overflow check. Some of this regression is
mitigated by having one less GC safepoint.
Also adds test case for StackOverflowError issue (from bdc).
Tests passing: ARM, X86, Mips
Phone booting: ARM
Bug: https://code.google.com/p/android/issues/detail?id=66411
Bug: 12967914
Change-Id: I96fe667799458b58d1f86671e051968f7be78d5d
(cherry-picked from c0f96d03a1855fda7d94332331b94860404874dd)
diff --git a/compiler/dex/quick/mips/mips_lir.h b/compiler/dex/quick/mips/mips_lir.h
index 59f442c..77ae337 100644
--- a/compiler/dex/quick/mips/mips_lir.h
+++ b/compiler/dex/quick/mips/mips_lir.h
@@ -138,7 +138,6 @@
#define r_FRESULT1 r_F1
// Regs not used for Mips.
-#define rMIPS_LR INVALID_REG
#define rMIPS_PC INVALID_REG
enum MipsResourceEncodingPos {
@@ -268,6 +267,7 @@
#define rMIPS_RET1 r_RESULT1
#define rMIPS_INVOKE_TGT r_T9
#define rMIPS_COUNT INVALID_REG
+#define rMIPS_LR r_RA
// RegisterLocation templates return values (r_V0, or r_V0/r_V1).
const RegLocation mips_loc_c_return