filter exception handlers by catch_type

Makefile

@@ -7,7 +7,7 @@ CC ?= gcc
 ARCH = -m32
 CFLAGS += -Wall -Werror -Wfatal-errors -Wno-error=unused-variable -fstack-protector -std=c2x -g
 CFLAGS += -DDEBUG
-CFLAGS += -DDEBUG_PRINT
+#CFLAGS += -DDEBUG_PRINT
 LDFLAGS = -lm
 OPT ?= -O0
 DEPFLAGS = -MMD -MP

c/class_resolver.c

@@ -464,6 +464,8 @@ struct method_entry class_resolver_lookup_method_from_interfacemethodref_index(i
     assert(class_entry != nullptr);
   }
 
+  print__class_file__class_name(objectref_class_entry->class_file);
+  printc('\n');
   assert(!"interfacemethodref method does not exist");
 }
 

c/debug.c

@@ -39,6 +39,13 @@ void debug_print__method_info__method_name(struct class_file * class_file, struc
   debug_print__constant__method_name(method_name_constant, method_descriptor_constant);
 }
 
+void print__string(const uint8_t * bytes, int length)
+{
+  for (int i = 0; i < length; i++) {
+    printc(bytes[i]);
+  }
+}
+
 void print__constant__utf8_string(struct constant * constant)
 {
   assert(constant->tag == CONSTANT_Utf8);

c/debug.h

@@ -9,6 +9,7 @@ void debug_print__class_file__class_name(struct class_file * class_file);
 void debug_print__constant__method_name(struct constant * name_constant, struct constant * descriptor_constant);
 void debug_print__method_info__method_name(struct class_file * class_file, struct method_info * method_info);
 
+void print__string(const uint8_t * bytes, int length);
 void print__constant__utf8_string(struct constant * constant);
 void print__class_file__class_name(struct class_file * class_file);
 void print__constant__method_name(struct constant * name_constant, struct constant * descriptor_constant);

c/frame.c

@@ -497,7 +497,14 @@ void vm_exception(struct vm * vm, int32_t * objectref)
   while (vm->frame_stack.ix > 0) {
     for (int i = 0; i < vm->current_frame->code_attribute->exception_table_length; i++) {
       struct exception_table_entry * entry = &vm->current_frame->code_attribute->exception_table[i];
-      if (vm->current_frame->pc >= entry->start_pc && vm->current_frame->pc < entry->end_pc) {
+      bool caught =
+        vm->current_frame->pc >= entry->start_pc &&
+        vm->current_frame->pc < entry->end_pc &&
+        exception_class_entry == class_resolver_lookup_class_from_class_index(vm->class_hash_table.length,
+                                                                              vm->class_hash_table.entry,
+                                                                              vm->current_frame->class_entry,
+                                                                              entry->catch_type);
+      if (caught) {
         operand_stack_push_u32(vm->current_frame, (uint32_t)objectref);
         vm->current_frame->next_pc = entry->handler_pc;
 
@@ -515,10 +522,27 @@ void vm_exception(struct vm * vm, int32_t * objectref)
     vm->current_frame = stack_pop_frame(&vm->frame_stack, 1);
   }
 
+  prints("exception: ");
+  print__class_file__class_name(exception_class_entry->class_file);
+  printc('\n');
+  {
+    int32_t * string_objectref = (int32_t *)objectref[2];
+    if (string_objectref != nullptr) {
+      prints("  message: ");
+      struct class_entry * string_class_entry = (struct class_entry *)string_objectref[0];
+      prints("(class: ");
+      print__class_file__class_name(string_class_entry->class_file);
+      printc(')');
+      prints("\n    ");
+      int32_t * arrayref = (int32_t *)string_objectref[1];
+      int32_t length = arrayref[0];
+      uint8_t * bytes = (uint8_t *)&arrayref[1];
+      print__string(bytes, length);
+      printc('\n');
+    }
+  }
   assert(objectref[1] != 0);
   backtrace_print((struct backtrace *)objectref[1]);
-
-  assert(!"exception");
 }
 
 static void print_vm_stack(struct vm * vm)

java/io/PrintStream.java

@@ -48,6 +48,10 @@ public class PrintStream
         write(String.valueOf(obj));
     }
 
+    public void print(String s) {
+        write(String.valueOf(s));
+    }
+
     public void println() {
         write(newline);
     }
@@ -91,4 +95,9 @@ public class PrintStream
         write(String.valueOf(obj));
         write(newline);
     }
+
+    public void println(String s) {
+        write(String.valueOf(s));
+        write(newline);
+    }
 }

p/TestException.java

@@ -1,20 +1,27 @@
 package p;
 
+class Exception2 extends Exception {
+    public Exception2(String message) {
+        super(message);
+    }
+}
+
 class TestException {
-    static void test2() throws Exception {
+    static void test2() throws Exception2 {
-        throw new Exception("asdf exception");
+        throw new Exception2("asdf exception");
     }
 
-    static void test() throws Exception {
+    static void test() throws Exception2 {
-        //        try {
+        try {
             test2();
-            //} catch (Exception e) {
+        } catch (Exception e) {
-            //System.out.println(e);
+            System.out.print("exception handler: ");
-            //throw e;
+            System.out.println(e);
-            //}
+            throw e;
+        }
     }
 
-    public static void main() throws Exception {
+    public static void main() throws Exception2 {
         test();
     }
 }