Instrument ARM64 generated code to check the Marking Register.

Generate run-time code in the Optimizing compiler checking that
the Marking Register's value matches `self.tls32_.is.gc_marking`
in debug mode (on target; and on host with JIT, or with AOT when
compiling the core image). If a check fails, abort.

Test: m test-art-target
Test: m test-art-target with tree built with ART_USE_READ_BARRIER=false
Test: ARM64 device boot test with libartd.
Bug: 37707231
Change-Id: Ie9b322b22b3d26654a06821e1db71dbda3c43061

1 files changed, 8 insertions, 1 deletions

diff --git a/compiler/utils/jni_macro_assembler.h b/compiler/utils/jni_macro_assembler.h
index 59a1a48e20..a8ca1119e5 100644
--- a/compiler/utils/jni_macro_assembler.h
+++ b/compiler/utils/jni_macro_assembler.h
@@ -216,8 +216,15 @@ class JNIMacroAssembler : public DeletableArenaObject<kArenaAllocAssembler> {
    */
   virtual DebugFrameOpCodeWriterForAssembler& cfi() = 0;
 
+  void SetEmitRunTimeChecksInDebugMode(bool value) {
+    emit_run_time_checks_in_debug_mode_ = value;
+  }
+
  protected:
-  explicit JNIMacroAssembler() {}
+  JNIMacroAssembler() {}
+
+  // Should run-time checks be emitted in debug mode?
+  bool emit_run_time_checks_in_debug_mode_ = false;
 };
 
 // A "Label" class used with the JNIMacroAssembler