riscv64: Enable JNI compiler.

Implement the required `WriteCIE()`, fix a bug in the
`art_jni_dlsym_lookup_critical_stub`, fix reference loads
to be zero-extended and enable the JNI compiler for riscv64.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: run-gtests.sh
Test: testrunner.py --target --64 --ndebug --prebuild --no-prebuild -t 178
Test: # Edit `run-test` to disable checker, then
      testrunner.py --target --64 --ndebug --cdex-none --optimizing
      # 7 tests fail (pre-existing failures): 004-StackWalk, 137-cfi,
      # 2042-reference-processing, 597-deopt-busy-loop, 629-vdex-speed,
      # 638-checker-inline-cache-intrinsic and 661-oat-writer-layout.
Test: aosp_cf_riscv64_phone-userdebug boots without crashes.
Bug: 283082089
Change-Id: Ifd47098b7428919b601dd22a130ad1bd51ae516d

1 files changed, 18 insertions, 0 deletions

diff --git a/compiler/utils/jni_macro_assembler.cc b/compiler/utils/jni_macro_assembler.cc
index a0230e37fe..dc7ec60032 100644
--- a/compiler/utils/jni_macro_assembler.cc
+++ b/compiler/utils/jni_macro_assembler.cc
@@ -37,6 +37,7 @@
 #include "base/casts.h"
 #include "base/globals.h"
 #include "base/memory_region.h"
+#include "gc_root.h"
 
 namespace art HIDDEN {
 
@@ -97,4 +98,21 @@ MacroAsm64UniquePtr JNIMacroAssembler<PointerSize::k64>::Create(
   }
 }
 
+template <PointerSize kPointerSize>
+void JNIMacroAssembler<kPointerSize>::LoadGcRootWithoutReadBarrier(ManagedRegister dest,
+                                                                   ManagedRegister base,
+                                                                   MemberOffset offs) {
+  static_assert(sizeof(uint32_t) == sizeof(GcRoot<mirror::Object>));
+  Load(dest, base, offs, sizeof(uint32_t));
+}
+
+template
+void JNIMacroAssembler<PointerSize::k32>::LoadGcRootWithoutReadBarrier(ManagedRegister dest,
+                                                                       ManagedRegister base,
+                                                                       MemberOffset offs);
+template
+void JNIMacroAssembler<PointerSize::k64>::LoadGcRootWithoutReadBarrier(ManagedRegister dest,
+                                                                       ManagedRegister base,
+                                                                       MemberOffset offs);
+
 }  // namespace art