Rewrite cpp-define-generator
The new method works by generating temporary per-architecture
human-readable object file with the constants embedded in it.
Python script extracts those values and generates the header.
This means the values can now implicitly depend on pointer size,
compile time flags, or ABI specific object layout with no hacks.
Test: test-art-host-gtest-arch_test
Change-Id: Id6e8c77c01f9d6c49cd6d40e3487b56fa4777349
diff --git a/tools/cpp-define-generator/asm_defines.cc b/tools/cpp-define-generator/asm_defines.cc
new file mode 100644
index 0000000..de67f1b
--- /dev/null
+++ b/tools/cpp-define-generator/asm_defines.cc
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Art Offset file dependencies
+#define DEFINE_INCLUDE_DEPENDENCIES
+#include "offsets_all.def"
+
+// We use "asm volatile" to generate text that will stand out in the
+// compiler generated intermediate assembly file (eg. ">>FOO 42 0<<").
+// We emit all values as 64-bit integers (which we will printed as text).
+// We also store a flag which specifies whether the constant is negative.
+// Note that "asm volatile" must be inside a method to please the compiler.
+#define DEFINE_EXPR(NAME, TYPE, EXPR) \
+void AsmDefineHelperFor_##NAME() { \
+ asm volatile("\n.ascii \">>" #NAME " %0 %1<<\"" \
+ :: "i" (static_cast<int64_t>(EXPR)), "i" (EXPR < 0 ? 1 : 0)); \
+}
+#include "offsets_all.def"