/**
* Allocate a HandlerNode.
* We do it because eventHandler doesn't know how big to make it.
*/
HandlerNode *
eventFilterRestricted_alloc(jint filterCount)
{
/*LINTED*/
size_t size = offsetof(EventFilterPrivate_HandlerNode, ef) +
offsetof(EventFilters, filters) +
(filterCount * (int)sizeof(Filter));
HandlerNode *node = jvmtiAllocate((jint)size);
if (node != NULL) {
int i;
Filter *filter;
(void)memset(node, 0, size);
FILTER_COUNT(node) = filterCount;
/* Initialize all modifiers
*/
for (i = 0, filter = FILTERS_ARRAY(node);
i < filterCount;
i++, filter++) {
filter->modifier = JDWP_REQUEST_NONE;
}
}
return node;
}
/**
* Allocate a HandlerNode.
* We do it because eventHandler doesn't know how big to make it.
*/
HandlerNode *
eventFilterRestricted_alloc(jint filterCount)
{
size_t size = offsetof(EventFilterPrivate_HandlerNode, ef) +
offsetof(EventFilters, filters) +
(filterCount * sizeof(Filter));
HandlerNode *node = jdwpClearedAlloc(size);
if (node != NULL) {
int i;
Filter *filter;
FILTER_COUNT(node) = filterCount;
/* Initialize all modifiers
*/
for (i = 0, filter = FILTERS_ARRAY(node);
i < filterCount;
i++, filter++) {
filter->modifier = JDWP_REQUEST_NONE;
}
}
return node;
}
/**
* Free up global refs held by the filter.
* free things up at the JNI level if needed.
*/
static jvmtiError
clearFilters(HandlerNode *node)
{
JNIEnv *env = getEnv();
jint i;
jvmtiError error = JVMTI_ERROR_NONE;
Filter *filter = FILTERS_ARRAY(node);
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(ThreadOnly):
if ( filter->u.ThreadOnly.thread != NULL ) {
tossGlobalRef(env, &(filter->u.ThreadOnly.thread));
}
break;
case JDWP_REQUEST_MODIFIER(LocationOnly):
tossGlobalRef(env, &(filter->u.LocationOnly.clazz));
break;
case JDWP_REQUEST_MODIFIER(FieldOnly):
tossGlobalRef(env, &(filter->u.FieldOnly.clazz));
break;
case JDWP_REQUEST_MODIFIER(ExceptionOnly):
if ( filter->u.ExceptionOnly.exception != NULL ) {
tossGlobalRef(env, &(filter->u.ExceptionOnly.exception));
}
break;
case JDWP_REQUEST_MODIFIER(InstanceOnly):
if ( filter->u.InstanceOnly.instance != NULL ) {
tossGlobalRef(env, &(filter->u.InstanceOnly.instance));
}
break;
case JDWP_REQUEST_MODIFIER(ClassOnly):
tossGlobalRef(env, &(filter->u.ClassOnly.clazz));
break;
case JDWP_REQUEST_MODIFIER(ClassMatch):
jvmtiDeallocate(filter->u.ClassMatch.classPattern);
break;
case JDWP_REQUEST_MODIFIER(ClassExclude):
jvmtiDeallocate(filter->u.ClassExclude.classPattern);
break;
case JDWP_REQUEST_MODIFIER(Step): {
jthread thread = filter->u.Step.thread;
error = stepControl_endStep(thread);
if (error == JVMTI_ERROR_NONE) {
tossGlobalRef(env, &(filter->u.Step.thread));
}
break;
}
}
}
if (error == JVMTI_ERROR_NONE) {
FILTER_COUNT(node) = 0; /* blast so we don't clear again */
}
return error;
}
/**
* Return the Filter that is of the specified type (modifier).
* Return NULL if not found.
*/
static Filter *
findFilter(HandlerNode *node, jint modifier)
{
int i;
Filter *filter;
for (i = 0, filter = FILTERS_ARRAY(node);
i <FILTER_COUNT(node);
i++, filter++) {
if (filter->modifier == modifier) {
return filter;
}
}
return NULL;
}
/**
* Determine the thread this node is filtered on.
* NULL if not thread filtered.
*/
static jthread
requestThread(HandlerNode *node)
{
int i;
Filter *filter = FILTERS_ARRAY(node);
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(ThreadOnly):
return filter->u.ThreadOnly.thread;
}
}
return NULL;
}
/**
* Determine if the given breakpoint node is in the specified class.
*/
jboolean
eventFilterRestricted_isBreakpointInClass(JNIEnv *env, jclass clazz,
HandlerNode *node)
{
Filter *filter = FILTERS_ARRAY(node);
int i;
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(LocationOnly):
return isSameObject(env, clazz, filter->u.LocationOnly.clazz);
}
}
return JNI_TRUE; /* should never come here */
}
/* Determine if this event is interesting to this handler. Do so
* by checking each of the handler's filters. Return false if any
* of the filters fail, true if the handler wants this event.
* Special version of filter for unloads since they don't have an
* event structure or a jclass.
*
* If shouldDelete is returned true, a count filter has expired
* and the corresponding node should be deleted.
*/
jboolean
eventFilterRestricted_passesUnloadFilter(JNIEnv *env,
char *classname,
HandlerNode *node,
jboolean *shouldDelete)
{
Filter *filter = FILTERS_ARRAY(node);
int i;
*shouldDelete = JNI_FALSE;
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(Count): {
JDI_ASSERT(filter->u.Count.count > 0);
if (--filter->u.Count.count > 0) {
return JNI_FALSE;
}
*shouldDelete = JNI_TRUE;
break;
}
case JDWP_REQUEST_MODIFIER(ClassMatch): {
if (!patternStringMatch(classname,
filter->u.ClassMatch.classPattern)) {
return JNI_FALSE;
}
break;
}
case JDWP_REQUEST_MODIFIER(ClassExclude): {
if (patternStringMatch(classname,
filter->u.ClassExclude.classPattern)) {
return JNI_FALSE;
}
break;
}
default:
ERROR_MESSAGE_EXIT("Invalid filter modifier");
return JNI_FALSE;
}
}
return JNI_TRUE;
}
/**
* Determine if the specified watchpoint node has the
* same field as the FieldFilter passed in arg.
*
* This is a match function called by a
* eventHandlerRestricted_iterator invokation.
*/
static jboolean
matchWatchpoint(JNIEnv *env, HandlerNode *node, void *arg)
{
FieldFilter *goal = (FieldFilter *)arg;
Filter *filter = FILTERS_ARRAY(node);
int i;
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(FieldOnly): {
FieldFilter *trial = &(filter->u.FieldOnly);
if (trial->field == goal->field &&
isSameObject(env, trial->clazz, goal->clazz)) {
return JNI_TRUE;
}
}
}
}
return JNI_FALSE;
}
/**
* Determine if the specified breakpoint node is in the
* same location as the LocationFilter passed in arg.
*
* This is a match function called by a
* eventHandlerRestricted_iterator invokation.
*/
static jboolean
matchBreakpoint(JNIEnv *env, HandlerNode *node, void *arg)
{
LocationFilter *goal = (LocationFilter *)arg;
Filter *filter = FILTERS_ARRAY(node);
int i;
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(LocationOnly): {
LocationFilter *trial = &(filter->u.LocationOnly);
if (trial->method == goal->method &&
trial->location == goal->location &&
isSameObject(env, trial->clazz, goal->clazz)) {
return JNI_TRUE;
}
}
}
}
return JNI_FALSE;
}
/**
* This function returns true only if it is certain that
* all events for the given node in the given frame will
* be filtered. It is used to optimize stepping. (If this
* function returns true the stepping algorithm does not
* have to step through every instruction in this frame;
* instead, it can use more efficient method entry/exit
* events.
*/
jboolean
eventFilter_predictFiltering(HandlerNode *node, jframeID frame)
{
Filter *filter = FILTERS_ARRAY(node);
int i;
jclass clazz;
jmethodID method;
jlocation location;
jboolean willBeFiltered = JNI_FALSE;
jboolean done = JNI_FALSE;
JNIEnv *env = getEnv();
jint error;
error = jvmdi->GetFrameLocation(frame, &clazz,
&method, &location);
if (error != JVMDI_ERROR_NONE) {
return JNI_FALSE;
}
for (i = 0; (i < FILTER_COUNT(node)) && (!done); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(ClassOnly):
if (!(*env)->IsAssignableFrom(env, clazz,
filter->u.ClassOnly.clazz)) {
willBeFiltered = JNI_TRUE;
done = JNI_TRUE;
}
break;
case JDWP_REQUEST_MODIFIER(Count): {
/*
* If preceeding filters have determined that events will
* be filtered out, that is fine and we won't get here.
* However, the count must be decremented - even if
* subsequent filters will filter these events. We
* thus must end now unable to predict
*/
done = JNI_TRUE;
break;
}
case JDWP_REQUEST_MODIFIER(ClassMatch): {
if (!patternMatch(clazz,
filter->u.ClassMatch.classPattern)) {
willBeFiltered = JNI_TRUE;
done = JNI_TRUE;
}
break;
}
case JDWP_REQUEST_MODIFIER(ClassExclude): {
if (patternMatch(clazz,
filter->u.ClassExclude.classPattern)) {
willBeFiltered = JNI_TRUE;
done = JNI_TRUE;
}
break;
}
}
}
(*env)->DeleteGlobalRef(env, clazz);
return willBeFiltered;
}
/*
* Determine if this event is interesting to this handler.
* Do so by checking each of the handler's filters.
* Return false if any of the filters fail,
* true if the handler wants this event.
* Anyone modifying this function should check
* eventFilterRestricted_passesUnloadFilter and
* eventFilter_predictFiltering as well.
*
* If shouldDelete is returned true, a count filter has expired
* and the corresponding node should be deleted.
*/
jboolean
eventFilterRestricted_passesFilter(JNIEnv *env,
JVMDI_Event *event,
HandlerNode *node,
jboolean *shouldDelete)
{
jthread thread;
jclass clazz;
Filter *filter = FILTERS_ARRAY(node);
int i;
*shouldDelete = JNI_FALSE;
eventThreadAndClass(event, &thread, &clazz);
/*
* Suppress most events if they happen in debug threads
*/
if ((event->kind != JVMDI_EVENT_CLASS_PREPARE) &&
(event->kind != JVMDI_EVENT_CLASS_UNLOAD) &&
(event->kind != JVMDI_EVENT_CLASS_LOAD) &&
threadControl_isDebugThread(thread)) {
return JNI_FALSE;
}
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(ThreadOnly):
if (!(*env)->IsSameObject(env, thread,
filter->u.ThreadOnly.thread)) {
return JNI_FALSE;
}
break;
case JDWP_REQUEST_MODIFIER(ClassOnly):
/* Class filters catch events in the specified
* class and any subclass/subinterface.
*/
if (!(*env)->IsAssignableFrom(env, clazz,
filter->u.ClassOnly.clazz)) {
return JNI_FALSE;
}
break;
/* This is kinda cheating assumming the JVMDI event
* fields will be in the same locations, but it is
* true now.
*/
case JDWP_REQUEST_MODIFIER(LocationOnly):
if (event->u.breakpoint.method !=
filter->u.LocationOnly.method ||
event->u.breakpoint.location !=
filter->u.LocationOnly.location ||
!(*env)->IsSameObject(env, clazz,
filter->u.LocationOnly.clazz)) {
return JNI_FALSE;
}
break;
case JDWP_REQUEST_MODIFIER(FieldOnly):
/* Field watchpoints can be triggered from the
* declared class or any subclass/subinterface.
*/
if ((event->u.field_access.field !=
filter->u.FieldOnly.field) ||
!(*env)->IsSameObject(env,
event->u.field_access.field_clazz,
filter->u.FieldOnly.clazz)) {
return JNI_FALSE;
}
break;
case JDWP_REQUEST_MODIFIER(ExceptionOnly):
/* do we want caught/uncaught exceptions */
if (!((event->u.exception.catch_clazz == NULL)?
filter->u.ExceptionOnly.uncaught :
filter->u.ExceptionOnly.caught)) {
return JNI_FALSE;
}
/* do we care about exception class */
if (filter->u.ExceptionOnly.exception != NULL) {
jclass exception = event->u.exception.exception;
/* do we want this exception class */
if (!(*env)->IsInstanceOf(env, exception,
filter->u.ExceptionOnly.exception)) {
return JNI_FALSE;
}
}
break;
case JDWP_REQUEST_MODIFIER(InstanceOnly): {
jobject eventInst = eventInstance(event);
jobject filterInst = filter->u.InstanceOnly.instance;
/* if no error and doesn't match, don't pass
* filter
*/
if (eventInst != NULL &&
!(*env)->IsSameObject(env, eventInst,
filterInst)) {
return JNI_FALSE;
}
break;
}
case JDWP_REQUEST_MODIFIER(Count): {
JDI_ASSERT(filter->u.Count.count > 0);
if (--filter->u.Count.count > 0) {
return JNI_FALSE;
}
*shouldDelete = JNI_TRUE;
break;
}
case JDWP_REQUEST_MODIFIER(Conditional):
/***
if (... filter->u.Conditional.exprID ...) {
return JNI_FALSE;
}
***/
break;
case JDWP_REQUEST_MODIFIER(ClassMatch): {
if (!patternMatch(clazz,
filter->u.ClassMatch.classPattern)) {
return JNI_FALSE;
}
break;
}
case JDWP_REQUEST_MODIFIER(ClassExclude): {
if (patternMatch(clazz,
filter->u.ClassExclude.classPattern)) {
return JNI_FALSE;
}
break;
}
case JDWP_REQUEST_MODIFIER(Step):
if (!(*env)->IsSameObject(env, thread,
filter->u.Step.thread)) {
return JNI_FALSE;
}
if (!stepControl_handleStep(env, event)) {
return JNI_FALSE;
}
break;
default:
ERROR_MESSAGE_EXIT("Invalid filter modifier");
return JNI_FALSE;
}
}
return JNI_TRUE;
}
/**
* Free up global refs held by the filter.
* free things up at the JNI level if needed.
*/
static jint
clearFilters(HandlerNode *node)
{
JNIEnv *env = getEnv();
jint i;
jint error = JVMDI_ERROR_NONE;
Filter *filter = FILTERS_ARRAY(node);
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(ThreadOnly): {
jthread threadOnly = filter->u.ThreadOnly.thread;
if (threadOnly != NULL) {
(*env)->DeleteGlobalRef(env, threadOnly);
}
break;
}
case JDWP_REQUEST_MODIFIER(LocationOnly): {
jclass clazz = filter->u.LocationOnly.clazz;
(*env)->DeleteGlobalRef(env, clazz);
break;
}
case JDWP_REQUEST_MODIFIER(FieldOnly): {
jclass clazz = filter->u.FieldOnly.clazz;
(*env)->DeleteGlobalRef(env, clazz);
break;
}
case JDWP_REQUEST_MODIFIER(ExceptionOnly): {
(*env)->DeleteGlobalRef(env,
filter->u.ExceptionOnly.exception);
break;
}
case JDWP_REQUEST_MODIFIER(InstanceOnly): {
(*env)->DeleteGlobalRef(env,
filter->u.InstanceOnly.instance);
break;
}
case JDWP_REQUEST_MODIFIER(ClassOnly): {
(*env)->DeleteGlobalRef(env,
filter->u.ClassOnly.clazz);
break;
}
case JDWP_REQUEST_MODIFIER(ClassMatch): {
jdwpFree(filter->u.ClassMatch.classPattern);
break;
}
case JDWP_REQUEST_MODIFIER(ClassExclude): {
jdwpFree(filter->u.ClassExclude.classPattern);
break;
}
case JDWP_REQUEST_MODIFIER(Step): {
jthread thread = filter->u.Step.thread;
error = stepControl_endStep(thread);
if (error == JVMDI_ERROR_NONE) {
(*env)->DeleteGlobalRef(env, thread);
}
break;
}
}
}
if (error == JVMDI_ERROR_NONE) {
FILTER_COUNT(node) = 0; /* blast so we don't clear again */
}
return error;
}
/**
* This function returns true only if it is certain that
* all events for the given node in the given stack frame will
* be filtered. It is used to optimize stepping. (If this
* function returns true the stepping algorithm does not
* have to step through every instruction in this stack frame;
* instead, it can use more efficient method entry/exit
* events.
*/
jboolean
eventFilter_predictFiltering(HandlerNode *node, jclass clazz, char *classname)
{
JNIEnv *env;
jboolean willBeFiltered;
Filter *filter;
jboolean done;
int count;
int i;
willBeFiltered = JNI_FALSE;
env = NULL;
filter = FILTERS_ARRAY(node);
count = FILTER_COUNT(node);
done = JNI_FALSE;
for (i = 0; (i < count) && (!done); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(ClassOnly):
if ( env==NULL ) {
env = getEnv();
}
if (!JNI_FUNC_PTR(env,IsAssignableFrom)(env, clazz,
filter->u.ClassOnly.clazz)) {
willBeFiltered = JNI_TRUE;
done = JNI_TRUE;
}
break;
case JDWP_REQUEST_MODIFIER(Count): {
/*
* If preceeding filters have determined that events will
* be filtered out, that is fine and we won't get here.
* However, the count must be decremented - even if
* subsequent filters will filter these events. We
* thus must end now unable to predict
*/
done = JNI_TRUE;
break;
}
case JDWP_REQUEST_MODIFIER(ClassMatch): {
if (!patternStringMatch(classname,
filter->u.ClassMatch.classPattern)) {
willBeFiltered = JNI_TRUE;
done = JNI_TRUE;
}
break;
}
case JDWP_REQUEST_MODIFIER(ClassExclude): {
if (patternStringMatch(classname,
filter->u.ClassExclude.classPattern)) {
willBeFiltered = JNI_TRUE;
done = JNI_TRUE;
}
break;
}
}
}
return willBeFiltered;
}
/*
* Determine if this event is interesting to this handler.
* Do so by checking each of the handler's filters.
* Return false if any of the filters fail,
* true if the handler wants this event.
* Anyone modifying this function should check
* eventFilterRestricted_passesUnloadFilter and
* eventFilter_predictFiltering as well.
*
* If shouldDelete is returned true, a count filter has expired
* and the corresponding node should be deleted.
*/
jboolean
eventFilterRestricted_passesFilter(JNIEnv *env,
char *classname,
EventInfo *evinfo,
HandlerNode *node,
jboolean *shouldDelete)
{
jthread thread;
jclass clazz;
jmethodID method;
Filter *filter = FILTERS_ARRAY(node);
int i;
*shouldDelete = JNI_FALSE;
thread = evinfo->thread;
clazz = evinfo->clazz;
method = evinfo->method;
/*
* Suppress most events if they happen in debug threads
*/
if ((evinfo->ei != EI_CLASS_PREPARE) &&
(evinfo->ei != EI_GC_FINISH) &&
(evinfo->ei != EI_CLASS_LOAD) &&
threadControl_isDebugThread(thread)) {
return JNI_FALSE;
}
for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) {
switch (filter->modifier) {
case JDWP_REQUEST_MODIFIER(ThreadOnly):
if (!isSameObject(env, thread, filter->u.ThreadOnly.thread)) {
return JNI_FALSE;
}
break;
case JDWP_REQUEST_MODIFIER(ClassOnly):
/* Class filters catch events in the specified
* class and any subclass/subinterface.
*/
if (!JNI_FUNC_PTR(env,IsAssignableFrom)(env, clazz,
filter->u.ClassOnly.clazz)) {
return JNI_FALSE;
}
break;
/* This is kinda cheating assumming the event
* fields will be in the same locations, but it is
* true now.
*/
case JDWP_REQUEST_MODIFIER(LocationOnly):
if (evinfo->method !=
filter->u.LocationOnly.method ||
evinfo->location !=
filter->u.LocationOnly.location ||
!isSameObject(env, clazz, filter->u.LocationOnly.clazz)) {
return JNI_FALSE;
}
break;
case JDWP_REQUEST_MODIFIER(FieldOnly):
/* Field watchpoints can be triggered from the
* declared class or any subclass/subinterface.
*/
if ((evinfo->u.field_access.field !=
filter->u.FieldOnly.field) ||
!isSameObject(env, evinfo->u.field_access.field_clazz,
filter->u.FieldOnly.clazz)) {
return JNI_FALSE;
}
break;
case JDWP_REQUEST_MODIFIER(ExceptionOnly):
/* do we want caught/uncaught exceptions */
if (!((evinfo->u.exception.catch_clazz == NULL)?
filter->u.ExceptionOnly.uncaught :
filter->u.ExceptionOnly.caught)) {
return JNI_FALSE;
}
/* do we care about exception class */
if (filter->u.ExceptionOnly.exception != NULL) {
jclass exception = evinfo->object;
/* do we want this exception class */
if (!JNI_FUNC_PTR(env,IsInstanceOf)(env, exception,
filter->u.ExceptionOnly.exception)) {
return JNI_FALSE;
}
}
break;
case JDWP_REQUEST_MODIFIER(InstanceOnly): {
jobject eventInst = eventInstance(evinfo);
jobject filterInst = filter->u.InstanceOnly.instance;
/* if no error and doesn't match, don't pass
* filter
*/
if (eventInst != NULL &&
!isSameObject(env, eventInst, filterInst)) {
return JNI_FALSE;
}
break;
}
case JDWP_REQUEST_MODIFIER(Count): {
JDI_ASSERT(filter->u.Count.count > 0);
if (--filter->u.Count.count > 0) {
return JNI_FALSE;
}
*shouldDelete = JNI_TRUE;
break;
}
case JDWP_REQUEST_MODIFIER(Conditional):
/***
if (... filter->u.Conditional.exprID ...) {
return JNI_FALSE;
}
***/
break;
case JDWP_REQUEST_MODIFIER(ClassMatch): {
if (!patternStringMatch(classname,
filter->u.ClassMatch.classPattern)) {
return JNI_FALSE;
}
break;
}
case JDWP_REQUEST_MODIFIER(ClassExclude): {
if (patternStringMatch(classname,
filter->u.ClassExclude.classPattern)) {
return JNI_FALSE;
}
break;
}
case JDWP_REQUEST_MODIFIER(Step):
if (!isSameObject(env, thread, filter->u.Step.thread)) {
return JNI_FALSE;
}
if (!stepControl_handleStep(env, thread, clazz, method)) {
return JNI_FALSE;
}
break;
case JDWP_REQUEST_MODIFIER(SourceNameMatch): {
char* desiredNamePattern = filter->u.SourceNameOnly.sourceNamePattern;
if (!searchAllSourceNames(env, clazz,
desiredNamePattern) == 1) {
/* The name isn't in the SDE; try the sourceName in the ref
* type
*/
char *sourceName = 0;
jvmtiError error = JVMTI_FUNC_PTR(gdata->jvmti,GetSourceFileName)
(gdata->jvmti, clazz, &sourceName);
if (error == JVMTI_ERROR_NONE &&
sourceName != 0 &&
patternStringMatch(sourceName, desiredNamePattern)) {
// got a hit - report the event
jvmtiDeallocate(sourceName);
break;
}
// We have no match, we have no source file name,
// or we got a JVM TI error. Don't report the event.
jvmtiDeallocate(sourceName);
return JNI_FALSE;
}
break;
}
default:
EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"Invalid filter modifier");
return JNI_FALSE;
}
}
return JNI_TRUE;
}
