riscv64: add initial support for ART.

The only supported mode is the switch interpreter. JNI transitions are
not implemented yet (not even generic JNI trampoline), therefore it is
impossible to run even a simple hello world test (because it requires
loading Java libraries and initializing classes in them, many of which
call native methods). The only passing ART test is 000-nop.

Test: run ART test 000-nop on a Linux RISC-V VM:
  lunch aosp_riscv64-userdebug

  export ART_TEST_SSH_USER=ubuntu
  export ART_TEST_SSH_HOST=localhost
  export ART_TEST_SSH_PORT=10001
  export ART_TEST_ON_VM=true

  . art/tools/buildbot-utils.sh
  art/tools/buildbot-build.sh --target

  # Create, boot and configure the VM.
  art/tools/buildbot-vm.sh create
  art/tools/buildbot-vm.sh boot
  art/tools/buildbot-vm.sh setup-ssh  # password: 'ubuntu'

  art/tools/buildbot-cleanup-device.sh
  art/tools/buildbot-setup-device.sh
  art/tools/buildbot-sync.sh

  art/test.py --target -r --no-prebuild --ndebug --no-image \
    --64 --interpreter 000-nop

Co-authored-by: Lifang Xia <lifang_xia@linux.alibaba.com>
Change-Id: Iac267525527901b74e863cb8c72ddcf0789e8a5d

1 files changed, 8 insertions, 0 deletions

diff --git a/compiler/optimizing/codegen_test_utils.h b/compiler/optimizing/codegen_test_utils.h
index 88551d8e90..7af9d0f44c 100644
--- a/compiler/optimizing/codegen_test_utils.h
+++ b/compiler/optimizing/codegen_test_utils.h
@@ -36,6 +36,10 @@
 #include "code_generator_arm64.h"
 #endif
 
+#ifdef ART_ENABLE_CODEGEN_riscv64
+#include "code_generator_riscv64.h"
+#endif
+
 #ifdef ART_ENABLE_CODEGEN_x86
 #include "code_generator_x86.h"
 #endif
@@ -329,6 +333,10 @@ inline CodeGenerator* create_codegen_arm64(HGraph* graph, const CompilerOptions&
 }
 #endif
 
+#ifdef ART_ENABLE_CODEGEN_riscv64
+inline CodeGenerator* create_codegen_riscv64(HGraph*, const CompilerOptions&) { return nullptr; }
+#endif
+
 #ifdef ART_ENABLE_CODEGEN_x86
 inline CodeGenerator* create_codegen_x86(HGraph* graph, const CompilerOptions& compiler_options) {
   return new (graph->GetAllocator()) TestCodeGeneratorX86(graph, compiler_options);