This lets us enabled/disable specific VM faults from regression tests
Signed-off-by: Tomek Grabiec <[email protected]>
---
Makefile | 3 +-
include/vm/fault-inject.h | 23 ++++++++++++
regression/jato/internal/VM.java | 4 ++
vm/class.c | 26 ++++++++++++++
vm/fault-inject.c | 69 ++++++++++++++++++++++++++++++++++++++
vm/jato.c | 3 ++
6 files changed, 127 insertions(+), 1 deletions(-)
create mode 100644 include/vm/fault-inject.h
create mode 100644 vm/fault-inject.c
diff --git a/Makefile b/Makefile
index 640e2dd..0273900 100644
--- a/Makefile
+++ b/Makefile
@@ -107,7 +107,8 @@ VM_OBJS = \
vm/types.o \
vm/utf8.o \
vm/zalloc.o \
- vm/preload.o
+ vm/preload.o \
+ vm/fault-inject.o
LIB_OBJS = \
lib/bitset.o \
diff --git a/include/vm/fault-inject.h b/include/vm/fault-inject.h
new file mode 100644
index 0000000..33d58fe
--- /dev/null
+++ b/include/vm/fault-inject.h
@@ -0,0 +1,23 @@
+#ifndef JATO_VM_FAULT_INJECT_H
+#define JATO_VM_FAULT_INJECT_H
+
+#include <stdbool.h>
+
+#include "vm/natives.h"
+
+struct vm_object;
+
+enum vm_fault {
+ VM_FAULT_CLASS_INIT = 1,
+ VM_FAULT_MAX
+};
+
+bool vm_fault_enabled(enum vm_fault fault);
+struct vm_object *vm_fault_arg(enum vm_fault fault);
+
+void __vm_native native_vm_enable_fault(enum vm_fault fault,
+ struct vm_object *arg);
+
+void __vm_native native_vm_disable_fault(enum vm_fault fault);
+
+#endif
diff --git a/regression/jato/internal/VM.java b/regression/jato/internal/VM.java
index 14015be..18721bd 100644
--- a/regression/jato/internal/VM.java
+++ b/regression/jato/internal/VM.java
@@ -1,6 +1,10 @@
package jato.internal;
public class VM {
+ public static final int FAULT_IN_CLASS_INIT = 1;
+
public static native void exit(int status);
public static native void println(String line);
+ public static native void enableFault(int kind, Object arg);
+ public static native void disableFault(int kind);
};
diff --git a/vm/class.c b/vm/class.c
index 961449d..96405db 100644
--- a/vm/class.c
+++ b/vm/class.c
@@ -37,6 +37,7 @@
#include <vm/class.h>
#include <vm/classloader.h>
#include <vm/die.h>
+#include <vm/fault-inject.h>
#include <vm/field.h>
#include <vm/preload.h>
#include <vm/method.h>
@@ -284,6 +285,19 @@ int vm_class_link_bogus_class(struct vm_class *vmc, const
char *class_name)
return 0;
}
+static bool vm_class_check_class_init_fault(struct vm_class *vmc,
+ struct vm_object *arg)
+{
+ char * str;
+ bool fault;
+
+ str = vm_string_to_cstr(arg);
+ fault = (strcmp(str, vmc->name) == 0);
+ free(str);
+
+ return fault;
+}
+
int vm_class_init(struct vm_class *vmc)
{
struct vm_object *exception;
@@ -299,6 +313,18 @@ int vm_class_init(struct vm_class *vmc)
/* XXX: Not entirely true, but we need it to break the recursion. */
vmc->state = VM_CLASS_INITIALIZED;
+ /* Fault injection, for testing purposes */
+ if (vm_fault_enabled(VM_FAULT_CLASS_INIT)) {
+ struct vm_object *arg;
+
+ arg = vm_fault_arg(VM_FAULT_CLASS_INIT);
+ if (vm_class_check_class_init_fault(vmc, arg)) {
+ signal_new_exception(vm_java_lang_RuntimeException,
+ NULL);
+ goto error;
+ }
+ }
+
/* JVM spec, 2nd. ed., 2.17.1: "But before Terminator can be
* initialized, its direct superclass must be initialized, as well
* as the direct superclass of its direct superclass, and so on,
diff --git a/vm/fault-inject.c b/vm/fault-inject.c
new file mode 100644
index 0000000..87cf3e7
--- /dev/null
+++ b/vm/fault-inject.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2009 Tomasz Grabiec
+ *
+ * This file is released under the GPL version 2 with the following
+ * clarification and special exception:
+ *
+ * Linking this library statically or dynamically with other modules is
+ * making a combined work based on this library. Thus, the terms and
+ * conditions of the GNU General Public License cover the whole
+ * combination.
+ *
+ * As a special exception, the copyright holders of this library give you
+ * permission to link this library with independent modules to produce an
+ * executable, regardless of the license terms of these independent
+ * modules, and to copy and distribute the resulting executable under terms
+ * of your choice, provided that you also meet, for each linked independent
+ * module, the terms and conditions of the license of that module. An
+ * independent module is a module which is not derived from or based on
+ * this library. If you modify this library, you may extend this exception
+ * to your version of the library, but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version.
+ *
+ * Please refer to the file LICENSE for details.
+ */
+
+#include "vm/fault-inject.h"
+#include "vm/object.h"
+
+struct vm_fault_entry {
+ bool enabled;
+ struct vm_object *arg;
+};
+
+static struct vm_fault_entry vm_fault_entries[VM_FAULT_MAX];
+
+bool vm_fault_enabled(enum vm_fault fault)
+{
+ if (fault < 0 || fault >= VM_FAULT_MAX)
+ return false;
+
+ return vm_fault_entries[fault].enabled;
+}
+
+struct vm_object *vm_fault_arg(enum vm_fault fault)
+{
+ if (fault < 0 || fault >= VM_FAULT_MAX)
+ return NULL;
+
+ return vm_fault_entries[fault].arg;
+}
+
+void __vm_native native_vm_enable_fault(enum vm_fault fault,
+ struct vm_object *arg)
+{
+ if (fault < 0 || fault >= VM_FAULT_MAX)
+ return;
+
+ vm_fault_entries[fault].enabled = true;
+ vm_fault_entries[fault].arg = arg;
+}
+
+void __vm_native native_vm_disable_fault(enum vm_fault fault)
+{
+ if (fault < 0 || fault >= VM_FAULT_MAX)
+ return;
+
+ vm_fault_entries[fault].enabled = false;
+}
diff --git a/vm/jato.c b/vm/jato.c
index 6595699..61ae285 100644
--- a/vm/jato.c
+++ b/vm/jato.c
@@ -42,6 +42,7 @@
#include "vm/class.h"
#include "vm/classloader.h"
+#include "vm/fault-inject.h"
#include "vm/preload.h"
#include "vm/method.h"
#include "vm/natives.h"
@@ -211,6 +212,8 @@ static struct vm_native natives[] = {
DEFINE_NATIVE("java/lang/VMSystem", "identityHashCode",
&native_vmsystem_identityhashcode),
DEFINE_NATIVE("java/lang/VMThrowable", "fillInStackTrace",
&native_vmthrowable_fill_in_stack_trace),
DEFINE_NATIVE("java/lang/VMThrowable", "getStackTrace",
&native_vmthrowable_get_stack_trace),
+ DEFINE_NATIVE("jato/internal/VM", "enableFault",
&native_vm_enable_fault),
+ DEFINE_NATIVE("jato/internal/VM", "disableFault",
&native_vm_disable_fault),
};
static void jit_init_natives(void)
--
1.6.0.6
------------------------------------------------------------------------------
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