MIPS: Check that address given to __RecordWrite is correct.

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
===================================================================
--- src/mips/macro-assembler-mips.cc	(revision 10367)
+++ src/mips/macro-assembler-mips.cc	(working copy)
@@ -252,6 +252,12 @@
   // registers are cp.
   ASSERT(!address.is(cp) && !value.is(cp));
 
+  if (emit_debug_code()) {
+    lw(at, MemOperand(address));
+    Assert(
+        eq, "Wrong address or value passed to RecordWrite", at, Operand(value));
+  }
+
   Label done;
 
   if (smi_check == INLINE_SMI_CHECK) {
@@ -297,7 +303,7 @@
                                          SaveFPRegsMode fp_mode,
                                          RememberedSetFinalAction and_then) {
   Label done;
-  if (FLAG_debug_code) {
+  if (emit_debug_code()) {
     Label ok;
     JumpIfNotInNewSpace(object, scratch, &ok);
     stop("Remembered set pointer is in new space");
@@ -4838,7 +4844,7 @@
   And(t8, mask_scratch, load_scratch);
   Branch(&done, ne, t8, Operand(zero_reg));
 
-  if (FLAG_debug_code) {
+  if (emit_debug_code()) {
     // Check for impossible bit pattern.
     Label ok;
     // sll may overflow, making the check conservative.