Prepare turbine for JDK 10

Including handling module-info's in ct.sym for JDK 10 and up.
Don't assert on unsupported class file major versions; we'll
still find out if changes are necessary.

MOE_MIGRATED_REVID=207294946

2 files changed, 9 insertions, 3 deletions

diff --git a/java/com/google/turbine/binder/CtSymClassBinder.java b/java/com/google/turbine/binder/CtSymClassBinder.java
index 5988ac5..8e15c1b 100644
--- a/java/com/google/turbine/binder/CtSymClassBinder.java
+++ b/java/com/google/turbine/binder/CtSymClassBinder.java
@@ -20,6 +20,7 @@ import com.google.common.base.Supplier;
 import com.google.common.base.Suppliers;
 import com.google.common.collect.ImmutableMap;
 import com.google.turbine.binder.bound.ModuleInfo;
+import com.google.turbine.binder.bytecode.BytecodeBinder;
 import com.google.turbine.binder.bytecode.BytecodeBoundClass;
 import com.google.turbine.binder.env.Env;
 import com.google.turbine.binder.env.SimpleEnv;
@@ -47,6 +48,7 @@ public class CtSymClassBinder {
       throw new IllegalStateException("lib/ct.sym does not exist in " + javaHome);
     }
     Map<ClassSymbol, BytecodeBoundClass> map = new HashMap<>();
+    Map<ModuleSymbol, ModuleInfo> modules = new HashMap<>();
     Env<ClassSymbol, BytecodeBoundClass> benv =
         new Env<ClassSymbol, BytecodeBoundClass>() {
           @Override
@@ -70,6 +72,11 @@ public class CtSymClassBinder {
       if (!ze.name().substring(0, idx).contains(version)) {
         continue;
       }
+      if (name.substring(name.lastIndexOf('/') + 1).equals("module-info.sig")) {
+        ModuleInfo moduleInfo = BytecodeBinder.bindModuleInfo(name, toByteArrayOrDie(ze));
+        modules.put(new ModuleSymbol(moduleInfo.name()), moduleInfo);
+        continue;
+      }
       ClassSymbol sym = new ClassSymbol(name.substring(idx + 1, name.length() - ".sig".length()));
       if (!map.containsKey(sym)) {
         map.put(
@@ -81,8 +88,7 @@ public class CtSymClassBinder {
       return null;
     }
     SimpleEnv<ClassSymbol, BytecodeBoundClass> env = new SimpleEnv<>(ImmutableMap.copyOf(map));
-    // TODO(cushon): support ct.sym module-infos once they exist (JDK 10?)
-    Env<ModuleSymbol, ModuleInfo> moduleEnv = new SimpleEnv<>(ImmutableMap.of());
+    Env<ModuleSymbol, ModuleInfo> moduleEnv = new SimpleEnv<>(ImmutableMap.copyOf(modules));
     TopLevelIndex index = SimpleTopLevelIndex.of(env.asMap().keySet());
     return new ClassPath() {
       @Override
diff --git a/java/com/google/turbine/bytecode/ClassReader.java b/java/com/google/turbine/bytecode/ClassReader.java
index 0032e63..1a98ce3 100644
--- a/java/com/google/turbine/bytecode/ClassReader.java
+++ b/java/com/google/turbine/bytecode/ClassReader.java
@@ -74,7 +74,7 @@ public class ClassReader {
     }
     int minorVersion = reader.u2();
     int majorVersion = reader.u2();
-    if (majorVersion < 45 || majorVersion > 53) {
+    if (majorVersion < 45) {
       throw error("bad version: %d.%d", majorVersion, minorVersion);
     }
     ConstantPoolReader constantPool = ConstantPoolReader.readConstantPool(reader);