gecko-dev/ef/Debugger/jvmdi.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (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.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "JavaVM.h"
#include "Debugger.h"
#include "jvmdi.h"
#include "NativeCodeCache.h"
#include "Thread.h"
extern "C" {
static JVMDI_EventHook eventHook;
/*
* Return via "statusPtr" the status of the thread as one of
* JVMDI_THREAD_STATUS_*.
* Errors: JVMDI_ERROR_INVALID_THREAD, JVMDI_ERROR_NULL_POINTER
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetThreadStatus(JNIEnv * /* env */, jthread thread, jint *statusPtr)
{
if (statusPtr == NULL) {
return JVMDI_ERROR_NULL_POINTER;
}
Thread::JavaThread *jt = (Thread::JavaThread *) thread;
Thread *t = (Thread*)static_cast<int32>(jt->eetop);
*statusPtr = t->getStatus();
return JVMDI_ERROR_NONE;
}
/* Note: jvm.h has suspend/resume (which may be deprecated - as
* Thread.suspend() has been). JVMDI version is different, as it
* takes precautions to attempt to avoid deadlock. Also it
* cannot be deprecated.
*/
/*
* Suspend the specified thread.
* Errors: JVMDI_ERROR_INVALID_THREAD, JVMDI_ERROR_THREAD_SUSPENDED,
* JVMDI_ERROR_VM_DEAD
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SuspendThread(JNIEnv * /*env*/, jthread thread)
{
Thread::JavaThread *jt = (Thread::JavaThread *) thread;
Thread *t = (Thread*)static_cast<int32>(jt->eetop);
t->suspend();
return JVMDI_ERROR_NONE;
}
/*
* Resume the specified thread.
* Errors: JVMDI_ERROR_INVALID_THREAD, JVMDI_ERROR_THREAD_NOT_SUSPENDED,
* JVMDI_ERROR_VM_DEAD
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_ResumeThread(JNIEnv * /*env*/, jthread thread)
{
Thread::JavaThread *jt = (Thread::JavaThread *) thread;
Thread *t = (Thread*)static_cast<int32>(jt->eetop);
t->resume();
return JVMDI_ERROR_NONE;
}
/*
* If shouldStep is true cause the thread to generate a
* JVMDI_EVENT_SINGLE_STEP event with each byte-code executed.
* Errors: JVMDI_ERROR_INVALID_THREAD,
* JVMDI_ERROR_THREAD_NOT_SUSPENDED (should suspension be a requirement?),
* JVMDI_ERROR_VM_DEAD
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetSingleStep(JNIEnv * /*env*/, jthread thread, jboolean shouldStep)
{
Thread::JavaThread *jt = (Thread::JavaThread *) thread;
jt->single_step = shouldStep;
return JVMDI_ERROR_NONE;
}
/*
* Thread Groups
*/
/*
* Return in 'groupsPtr' an array of top-level thread groups (parentless
* thread groups).
* Note: array returned via 'groupsPtr' is allocated globally and must be
* explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_NULL_POINTER, JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetTopThreadGroups(JNIEnv * /*env*/, jobjectArray * /*groupsPtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return in 'threadsPtr' an array of the threads within the specified
* thread group.
* Note: array returned via 'threadsPtr' is allocated globally and must be
* explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_INVALID_THREAD_GROUP, JVMDI_ERROR_NULL_POINTER,
* JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetGroupsThreads(JNIEnv * /*env*/, jthreadGroup /*group*/,
jobjectArray * /*threadsPtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return in 'groupsPtr' an array of the thread groups within the
* specified thread group.
* Note: array returned via 'groupsPtr' is allocated globally and must be
* explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_INVALID_THREAD_GROUP, JVMDI_ERROR_NULL_POINTER,
* JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetGroupsThreadGroups(JNIEnv * /*env*/, jthreadGroup /*group*/,
jobjectArray * /*groupsPtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Suspend all threads recursively contained in the thread group,
* except the specified threads.
* If except is NULL suspend all threads in group.
* Errors: JVMDI_ERROR_INVALID_THREAD_GROUP, JVMDI_ERROR_INVALID_THREAD
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SuspendThreadGroup(JNIEnv * /*env*/, jthreadGroup /*group*/,
jobjectArray /*except*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Resume all threads (recursively) in the thread group, except the
* specified threads. If except is NULL resume all threads in group.
* Errors: JVMDI_ERROR_INVALID_THREAD_GROUP, JVMDI_ERROR_INVALID_THREAD
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_ResumeThreadGroup(JNIEnv * /*env*/, jthreadGroup /*group*/, jobjectArray /*except*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Stack access
*/
/*
* Return via "framePtr" the frame ID for the current stack frame
* of this thread. Thread must be suspended. Only Java and
* Java native frames are returned. FrameIDs become invalid if
* the frame is resumed.
* Errors: JVMDI_ERROR_NO_MORE_FRAMES, JVMDI_ERROR_INVALID_THREAD,
* JVMDI_ERROR_THREAD_NOT_SUSPENDED, JVMDI_ERROR_NULL_POINTER
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetCurrentFrame(JNIEnv * /*env*/, jthread /*thread*/, jframeID* framePtr)
{
if (framePtr == NULL) {
return JVMDI_ERROR_NULL_POINTER;
}
return JVMDI_ERROR_NONE;
}
/*
* Return via "framePtr" the frame ID for the stack frame that called
* the specified frame. Only Java and Java native frames are returned.
* Errors: JVMDI_ERROR_NO_MORE_FRAMES, JVMDI_ERROR_INVALID_FRAMEID,
* JVMDI_ERROR_NULL_POINTER
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetCallerFrame(JNIEnv * /* env */, jframeID /* called*/, jframeID * /*framePtr*/)
{
// Use code from the stackwalker here
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return via "classPtr" and "methodPtr" the active method in the
* specified frame.
* Note: class returned via 'classPtr' is allocated globally and must be
* explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_NULL_POINTER
* JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetFrameMethod(JNIEnv * /*env*/, jframeID /*frame*/,
jclass * /*classPtr*/, jmethodID * /*methodPtr*/)
{
// Use code from the stackwalker here
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return via "bciPtr" the byte-code index within the active method of
* the specified frame. This is the index of the currently executing
* instruction.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_NATIVE_FRAME,
* JVMDI_ERROR_NULL_POINTER
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetFrameBCI(JNIEnv * /*env*/, jframeID /*frame*/, jint * /*bciPtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Local variables
*/
/*
* Return via "valuePtr" the value of the local variable at the
* specificied slot.
* Note: object returned via 'valuePtr' is allocated globally and must be
* explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NULL_POINTER,
* JVMDI_ERROR_NATIVE_FRAME, JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetLocalObject(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/,
jobject * /*valuePtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return via "valuePtr" the value of the local variable at the
* specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NULL_POINTER,
* JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetLocalInt(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/,
jint * /*valuePtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return via "valuePtr" the value of the local variable at the
* specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NULL_POINTER,
* JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetLocalLong(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/,
jlong * /*valuePtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return via "valuePtr" the value of the local variable at the
* specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NULL_POINTER,
* JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetLocalFloat(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/,
jfloat * /*valuePtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return via "valuePtr" the value of the local variable at the
* specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NULL_POINTER,
* JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetLocalDouble(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/,
jdouble * /*valuePtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Set the value of the local variable at the specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetLocalObject(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/, jobject /*value*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Set the value of the local variable at the specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetLocalInt(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/, jint /*value*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Set the value of the local variable at the specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetLocalLong(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/, jlong /*value*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Set the value of the local variable at the specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetLocalFloat(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/, jfloat /*value*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Set the value of the local variable at the specificied slot.
* Errors: JVMDI_ERROR_INVALID_FRAMEID, JVMDI_ERROR_INVALID_SLOT,
* JVMDI_ERROR_TYPE_MISMATCH, JVMDI_ERROR_NATIVE_FRAME
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetLocalDouble(JNIEnv * /*env*/, jframeID /*frame*/, jint /*slot*/, jdouble /*value*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Breakpoints
*/
/*
* Set a breakpoint. Send a JVMDI_EVENT_BREAKPOINT event when the
* instruction at the specified byte-code index in the specified
* method is about to be executed.
* Errors: JVMDI_ERROR_INVALID_METHODID, JVMDI_ERROR_INVALID_CLASS,
* JVMDI_ERROR_INVALID_BCI, JVMDI_ERROR_DUPLICATE_BREAKPOINT,
* JVMDI_ERROR_VM_DEAD, JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetBreakpoint(JNIEnv * /*env*/, jclass /* clazz */,
jmethodID method, jint /*bci*/)
{
CacheEntry* ce;
ce = NativeCodeCache::getCache().lookupByRange((Uint8*) method);
if (ce == NULL) {
/* either the method is not compiled - in which case compile it */
return JVMDI_ERROR_INVALID_METHODID;
}
void *code = addressFunction(ce->descriptor.method->getCode());
if (code == NULL) {
return JVMDI_ERROR_INVALID_METHODID;
} // else if (code == stub) compile and then break;
// Convert the bci to a pc offset and add it to code
VM::debugger.setBreakPoint(code);
return JVMDI_ERROR_NONE;
}
/*
* Clear a breakpoint.
* Errors: JVMDI_ERROR_INVALID_METHODID, JVMDI_ERROR_INVALID_CLASS,
* JVMDI_ERROR_INVALID_BCI, JVMDI_ERROR_NO_SUCH_BREAKPOINT,
* JVMDI_ERROR_VM_DEAD
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_ClearBreakpoint(JNIEnv * /*env*/, jclass /*clazz*/, jmethodID /*method*/, jint /*bci*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Clear all breakpoints.
* Errors: JVMDI_ERROR_VM_DEAD
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_ClearAllBreakpoints(JNIEnv * /*env*/)
{
VM::debugger.clearAllBreakPoints();
return JVMDI_ERROR_NONE;
}
/*
* Set the routine which will handle in-coming events.
* Passing NULL as hook unsets hook.
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_SetEventHook(JNIEnv * /*env*/, JVMDI_EventHook hook)
{
eventHook = hook;
return JVMDI_ERROR_NONE;
}
/*
* Method access
*/
/*
* Return via "namePtr" the method's name and via "signaturePtr" the
* method's signature.
* Note: strings returned via 'namePtr' and 'signaturePtr' are
* allocated globally and must be explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_INVALID_METHODID, JVMDI_ERROR_INVALID_CLASS,
* JVMDI_ERROR_NULL_POINTER, JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetMethodName(JNIEnv * env, jclass /*clazz*/, jmethodID method,
jstring *namePtr, jstring *signaturePtr)
{
CacheEntry* ce;
ce = NativeCodeCache::getCache().lookupByRange((Uint8*) method);
if (namePtr == NULL || signaturePtr == NULL) {
return JVMDI_ERROR_NULL_POINTER;
}
if (ce == NULL) {
return JVMDI_ERROR_INVALID_METHODID;
}
*namePtr = (jstring) env->NewGlobalRef(
env->NewStringUTF(ce->descriptor.method->toString()));
*signaturePtr = (jstring) env->NewGlobalRef(
env->NewStringUTF(ce->descriptor.method->getSignatureString()));
return JVMDI_ERROR_NONE;
}
/*
* Return via "definingClassPtr" the class in which this method is
* defined.
* Note: class returned via 'definingClassPtr' is allocated globally
* and must be explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_INVALID_METHODID, JVMDI_ERROR_INVALID_CLASS,
* JVMDI_ERROR_NULL_POINTER, JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetMethodDefiningClass(JNIEnv * env, jclass /* clazz */, jmethodID method,
jclass * definingClassPtr)
{
CacheEntry* ce;
ce = NativeCodeCache::getCache().lookupByRange((Uint8*) method);
if (definingClassPtr == NULL) {
return JVMDI_ERROR_NULL_POINTER;
}
*definingClassPtr = (jclass) (env->NewGlobalRef((jobject)
ce->descriptor.method->getDeclaringClass()));
return JVMDI_ERROR_NONE;
}
/*
* Return via "isNativePtr" a boolean indicating whether the method
* is native.
* Errors: JVMDI_ERROR_INVALID_METHODID, JVMDI_ERROR_INVALID_CLASS,
* JVMDI_ERROR_NULL_POINTER
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_IsMethodNative(JNIEnv * /* env */, jclass /* clazz */, jmethodID method,
jboolean * isNativePtr)
{
if (isNativePtr == NULL) {
return JVMDI_ERROR_NULL_POINTER;
}
CacheEntry* ce;
ce = NativeCodeCache::getCache().lookupByRange((Uint8*) method);
if (ce == NULL) {
/* either the method is not compiled - in which case compile it */
return JVMDI_ERROR_INVALID_METHODID;
}
*isNativePtr = ce->descriptor.method->getMethodInfo().isNative();
return JVMDI_ERROR_NONE;
}
/*
* Misc
*/
/*
* Return via "classesPtr" all classes currently loaded in the VM.
* Note: array returned via 'classesPtr' is allocated globally
* and must be explictly freed with DeleteGlobalRef.
* Errors: JVMDI_ERROR_NULL_POINTER, JVMDI_ERROR_OUT_OF_MEMORY
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetLoadedClasses(JNIEnv * /*env*/, jobjectArray * /*classesPtr*/)
{
return JVMDI_ERROR_NOT_IMPLEMENTED;
}
/*
* Return via "versionPtr" the JVMDI version number.
* Higher 16 bits is major version number, lower 16 bit is minor
* version number.
* Errors: JVMDI_ERROR_NULL_POINTER
*/
JNIEXPORT JNICALL(jvmdiError)
JVMDI_GetVersionNumber(JNIEnv * /*env*/, jint *versionPtr)
{
if (versionPtr == NULL) {
return JVMDI_ERROR_NULL_POINTER;
}
*versionPtr = 0x00000003;
return JVMDI_ERROR_NONE;
}
} // extern C