[compiler] Add relocatable pointer constants for wasm memory references.

test/cctest/test-wasm-relocation-disasm-arm.cc

Index: test/cctest/test-wasm-relocation-disasm-arm.cc
diff --git a/test/cctest/test-symbols.cc b/test/cctest/test-wasm-relocation-disasm-arm.cc
similarity index 51%
copy from test/cctest/test-symbols.cc
copy to test/cctest/test-wasm-relocation-disasm-arm.cc
index 1024a27edfd88cd0c5769f0b86d56b0a7f8475b2..1077bde6fe50a5205470048f2c0f095f14804755 100644
--- a/test/cctest/test-symbols.cc
+++ b/test/cctest/test-wasm-relocation-disasm-arm.cc
@@ -1,4 +1,4 @@
-// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright 2016 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,52 +25,75 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Check that we can traverse very deep stacks of ConsStrings using
-// StringCharacterStram.  Check that Get(int) works on very deep stacks
-// of ConsStrings.  These operations may not be very fast, but they
-// should be possible without getting errors due to too deep recursion.
+#include <iostream>  // NOLINT(readability/streams)
 
 #include "src/v8.h"
+#include "test/cctest/cctest.h"
 
-#include "src/objects.h"
+#include "src/arm/assembler-arm-inl.h"
+#include "src/arm/simulator-arm.h"
+#include "src/disassembler.h"
+#include "src/factory.h"
 #include "src/ostreams.h"
-#include "test/cctest/cctest.h"
+#include "test/cctest/compiler/c-signature.h"
+#include "test/cctest/compiler/call-tester.h"
 
+using namespace v8::base;
 using namespace v8::internal;
+using namespace v8::internal::compiler;
 
+#define __ assm.
 
-TEST(Create) {
+static int32_t DummyStaticFunction(Object* result) { return 1; }
+
+TEST(WasmRelocationArm) {
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   HandleScope scope(isolate);
+  v8::internal::byte buffer[4096];
+  DummyStaticFunction(NULL);
+  int32_t imm = 1234567;
+
+  Assembler assm(isolate, buffer, sizeof buffer);
 
-  const int kNumSymbols = 30;
-  Handle<Symbol> symbols[kNumSymbols];
+  __ mov(r0, Operand(imm, RelocInfo::WASM_MEMORY_REFERENCE));
+  __ mov(pc, Operand(lr));
 
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+
+  CSignature0<int32_t> csig;
+  CodeRunner<int32_t> runnable(isolate, code, &csig);
+  int32_t ret_value = runnable.Call();
+  CHECK_EQ(ret_value, imm);
+
+#ifdef DEBUG
   OFStream os(stdout);
-  for (int i = 0; i < kNumSymbols; ++i) {
-    symbols[i] = isolate->factory()->NewSymbol();
-    CHECK(symbols[i]->IsName());
-    CHECK(symbols[i]->IsSymbol());
-    CHECK(symbols[i]->HasHashCode());
-    CHECK_GT(symbols[i]->Hash(), 0u);
-    os << Brief(*symbols[i]) << "\n";
-#if OBJECT_PRINT
-    symbols[i]->Print(os);
-#endif
-#if VERIFY_HEAP
-    symbols[i]->ObjectVerify();
+  code->Print(os);
+  ::printf("f() = %d\n\n", ret_value);
 #endif
-  }
-
-  CcTest::heap()->CollectGarbage(i::NEW_SPACE);
-  CcTest::heap()->CollectAllGarbage();
+  size_t offset = 1234;
 
-  // All symbols should be distinct.
-  for (int i = 0; i < kNumSymbols; ++i) {
-    CHECK(symbols[i]->SameValue(*symbols[i]));
-    for (int j = i + 1; j < kNumSymbols; ++j) {
-      CHECK(!symbols[i]->SameValue(*symbols[j]));
+  // Relocating references by offset
+  int mode_mask = (1 << RelocInfo::WASM_MEMORY_REFERENCE);
+  for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
+    RelocInfo::Mode mode = it.rinfo()->rmode();
+    if (RelocInfo::IsWasmMemoryReference(mode)) {
+      it.rinfo()->update_wasm_memory_reference(
+          it.rinfo()->wasm_memory_reference() + offset, SKIP_ICACHE_FLUSH);
     }
   }
+
+  // Call into relocated code object
+  ret_value = runnable.Call();
+  CHECK_EQ((imm + offset), ret_value);
+
+#ifdef DEBUG
+  code->Print(os);
+  ::printf("f() = %d\n\n", ret_value);
+#endif
 }
+
+#undef __