eventfilter.c

来自「This is a resource based on j2me embedde」· C语言 代码 · 共 1,327 行 · 第 1/3 页

            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) {
                      if (sourceName == 0 || !patternStringMatch(sourceName, desiredNamePattern)) {
                        /* We have no match */
                        jvmtiDeallocate(sourceName);
                        return JNI_FALSE;
                      }
                  }
                  jvmtiDeallocate(sourceName);
              }
              break;
          }
       
        default: 
            EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"Invalid filter modifier");
            return JNI_FALSE;
        }
    }
    return JNI_TRUE;
}

/* 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: 
                EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"Invalid filter modifier");
                return JNI_FALSE;
        }
    }
    return JNI_TRUE;
}

/**
 * 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 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 */
}

/***** filter set-up *****/

jvmtiError
eventFilter_setConditionalFilter(HandlerNode *node, jint index, 
                                 jint exprID)
{
    ConditionalFilter *filter = &FILTER(node, index).u.Conditional;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(Conditional);
    filter->exprID = exprID;
    return JVMTI_ERROR_NONE;
}

jvmtiError
eventFilter_setCountFilter(HandlerNode *node, jint index, 
                           jint count)
{
    CountFilter *filter = &FILTER(node, index).u.Count;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if (count <= 0) {
        return JDWP_ERROR(INVALID_COUNT);
    } else {
        FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(Count);
        filter->count = count;
        return JVMTI_ERROR_NONE;
    }
}

jvmtiError 
eventFilter_setThreadOnlyFilter(HandlerNode *node, jint index,
                                jthread thread)
{
    JNIEnv *env = getEnv();
    ThreadFilter *filter = &FILTER(node, index).u.ThreadOnly;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if (NODE_EI(node) == EI_GC_FINISH) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    } 
    
    /* Create a thread ref that will live beyond */
    /* the end of this call */
    saveGlobalRef(env, thread, &(filter->thread));
    FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(ThreadOnly);
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setLocationOnlyFilter(HandlerNode *node, jint index, 
                                  jclass clazz, jmethodID method,
                                  jlocation location)
{
    JNIEnv *env = getEnv();
    LocationFilter *filter = &FILTER(node, index).u.LocationOnly;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if ((NODE_EI(node) != EI_BREAKPOINT) && 
        (NODE_EI(node) != EI_FIELD_ACCESS) && 
        (NODE_EI(node) != EI_FIELD_MODIFICATION) && 
        (NODE_EI(node) != EI_SINGLE_STEP) && 
        (NODE_EI(node) != EI_EXCEPTION)) {

        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }

    /* Create a class ref that will live beyond */
    /* the end of this call */
    saveGlobalRef(env, clazz, &(filter->clazz));
    FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(LocationOnly);
    filter->method = method;
    filter->location = location;
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setFieldOnlyFilter(HandlerNode *node, jint index, 
                               jclass clazz, jfieldID field)
{
    JNIEnv *env = getEnv();
    FieldFilter *filter = &FILTER(node, index).u.FieldOnly;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if ((NODE_EI(node) != EI_FIELD_ACCESS) && 
        (NODE_EI(node) != EI_FIELD_MODIFICATION)) {

        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }

    /* Create a class ref that will live beyond */
    /* the end of this call */
    saveGlobalRef(env, clazz, &(filter->clazz));
    FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(FieldOnly);
    filter->field = field;
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setClassOnlyFilter(HandlerNode *node, jint index, 
                               jclass clazz)
{
    JNIEnv *env = getEnv();
    ClassFilter *filter = &FILTER(node, index).u.ClassOnly;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if (
        (NODE_EI(node) == EI_GC_FINISH) ||
        (NODE_EI(node) == EI_THREAD_START) ||
        (NODE_EI(node) == EI_THREAD_END)) {

        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }

    /* Create a class ref that will live beyond */
    /* the end of this call */
    saveGlobalRef(env, clazz, &(filter->clazz));
    FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(ClassOnly);
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setExceptionOnlyFilter(HandlerNode *node, jint index, 
                                   jclass exceptionClass, 
                                   jboolean caught,
                                   jboolean uncaught)
{
    JNIEnv *env = getEnv();
    ExceptionFilter *filter = &FILTER(node, index).u.ExceptionOnly;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if (NODE_EI(node) != EI_EXCEPTION) { 
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }

    filter->exception = NULL;
    if (exceptionClass != NULL) {
        /* Create a class ref that will live beyond */
        /* the end of this call */
        saveGlobalRef(env, exceptionClass, &(filter->exception));
    }
    FILTER(node, index).modifier = 
                       JDWP_REQUEST_MODIFIER(ExceptionOnly);
    filter->caught = caught;
    filter->uncaught = uncaught;
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setInstanceOnlyFilter(HandlerNode *node, jint index, 
                                  jobject instance)
{
    JNIEnv *env = getEnv();
    InstanceFilter *filter = &FILTER(node, index).u.InstanceOnly;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }

    filter->instance = NULL;
    if (instance != NULL) {
        /* Create an object ref that will live beyond 
         * the end of this call
         */
        saveGlobalRef(env, instance, &(filter->instance));
    }
    FILTER(node, index).modifier =
                       JDWP_REQUEST_MODIFIER(InstanceOnly);
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setClassMatchFilter(HandlerNode *node, jint index, 
                                char *classPattern)
{
    MatchFilter *filter = &FILTER(node, index).u.ClassMatch;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if (
        (NODE_EI(node) == EI_THREAD_START) ||
        (NODE_EI(node) == EI_THREAD_END)) {

        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }

    FILTER(node, index).modifier = 
                       JDWP_REQUEST_MODIFIER(ClassMatch);
    filter->classPattern = classPattern;
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setClassExcludeFilter(HandlerNode *node, jint index, 
                                  char *classPattern)
{
    MatchFilter *filter = &FILTER(node, index).u.ClassExclude;
    if (index >= FILTER_COUNT(node)) {
        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }
    if (
        (NODE_EI(node) == EI_THREAD_START) ||
        (NODE_EI(node) == EI_THREAD_END)) {

        return AGENT_ERROR_ILLEGAL_ARGUMENT;
    }

    FILTER(node, index).modifier = 
                       JDWP_REQUEST_MODIFIER(ClassExclude);
    filter->classPattern = classPattern;
    return JVMTI_ERROR_NONE;
}

jvmtiError 
eventFilter_setStepFilter(HandlerNode *node, jint index, 
                          jthread thread, jint size, jint depth)
{
    jvmtiError error;