michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * JavaScript Debugging support - Call stack support
michael@0:  */
michael@0: 
michael@0: #include "jsd.h"
michael@0: #include "jsfriendapi.h"
michael@0: #include "nsCxPusher.h"
michael@0: 
michael@0: using mozilla::AutoPushJSContext;
michael@0: 
michael@0: #ifdef DEBUG
michael@0: void JSD_ASSERT_VALID_THREAD_STATE(JSDThreadState* jsdthreadstate)
michael@0: {
michael@0:     MOZ_ASSERT(jsdthreadstate);
michael@0:     MOZ_ASSERT(jsdthreadstate->stackDepth > 0);
michael@0: }
michael@0: 
michael@0: void JSD_ASSERT_VALID_STACK_FRAME(JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     MOZ_ASSERT(jsdframe);
michael@0:     MOZ_ASSERT(jsdframe->jsdthreadstate);
michael@0: }
michael@0: #endif
michael@0: 
michael@0: static JSDStackFrameInfo* 
michael@0: _addNewFrame(JSDContext*        jsdc,
michael@0:              JSDThreadState*    jsdthreadstate,
michael@0:              JSScript*          script,
michael@0:              uintptr_t          pc,
michael@0:              bool               isConstructing,
michael@0:              JSAbstractFramePtr frame)
michael@0: {
michael@0:     JSDStackFrameInfo* jsdframe;
michael@0:     JSDScript*         jsdscript = nullptr;
michael@0: 
michael@0:     JSD_LOCK_SCRIPTS(jsdc);
michael@0:     jsdscript = jsd_FindJSDScript(jsdc, script);
michael@0:     JSD_UNLOCK_SCRIPTS(jsdc);
michael@0:     if (!jsdscript || (jsdc->flags & JSD_HIDE_DISABLED_FRAMES &&
michael@0:                        !JSD_IS_DEBUG_ENABLED(jsdc, jsdscript)))
michael@0:     {
michael@0:         return nullptr;
michael@0:     }
michael@0: 
michael@0:     if (!JSD_IS_DEBUG_ENABLED(jsdc, jsdscript))
michael@0:         jsdthreadstate->flags |= TS_HAS_DISABLED_FRAME;
michael@0: 
michael@0:     jsdframe = (JSDStackFrameInfo*) calloc(1, sizeof(JSDStackFrameInfo));
michael@0:     if( ! jsdframe )
michael@0:         return nullptr;
michael@0: 
michael@0:     jsdframe->jsdthreadstate = jsdthreadstate;
michael@0:     jsdframe->jsdscript      = jsdscript;
michael@0:     jsdframe->isConstructing = isConstructing;
michael@0:     jsdframe->pc             = pc;
michael@0:     jsdframe->frame          = frame;
michael@0: 
michael@0:     JS_APPEND_LINK(&jsdframe->links, &jsdthreadstate->stack);
michael@0:     jsdthreadstate->stackDepth++;
michael@0: 
michael@0:     return jsdframe;
michael@0: }
michael@0: 
michael@0: static void
michael@0: _destroyFrame(JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     /* kill any alloc'd objects in frame here... */
michael@0: 
michael@0:     if( jsdframe )
michael@0:         free(jsdframe);
michael@0: }
michael@0: 
michael@0: JSDThreadState*
michael@0: jsd_NewThreadState(JSDContext* jsdc, JSContext *cx )
michael@0: {
michael@0:     JSDThreadState* jsdthreadstate;
michael@0: 
michael@0:     jsdthreadstate = (JSDThreadState*)calloc(1, sizeof(JSDThreadState));
michael@0:     if( ! jsdthreadstate )
michael@0:         return nullptr;
michael@0: 
michael@0:     jsdthreadstate->context = cx;
michael@0:     jsdthreadstate->thread = JSD_CURRENT_THREAD();
michael@0:     JS_INIT_CLIST(&jsdthreadstate->stack);
michael@0:     jsdthreadstate->stackDepth = 0;
michael@0: 
michael@0:     JS_BeginRequest(jsdthreadstate->context);
michael@0: 
michael@0:     JSBrokenFrameIterator iter(cx);
michael@0:     while(!iter.done())
michael@0:     {
michael@0:         JSAbstractFramePtr frame = iter.abstractFramePtr();
michael@0:         JS::RootedScript script(cx, frame.script());
michael@0:         uintptr_t  pc = (uintptr_t)frame.pc();
michael@0:         JS::RootedValue dummyThis(cx);
michael@0: 
michael@0:         /*
michael@0:          * don't construct a JSDStackFrame for dummy frames (those without a
michael@0:          * |this| object, or native frames, if JSD_INCLUDE_NATIVE_FRAMES
michael@0:          * isn't set.
michael@0:          */
michael@0:         if (frame.getThisValue(cx, &dummyThis))
michael@0:         {
michael@0:             bool isConstructing = iter.isConstructing();
michael@0:             JSDStackFrameInfo *frameInfo = _addNewFrame( jsdc, jsdthreadstate, script, pc, isConstructing, frame );
michael@0: 
michael@0:             if ((jsdthreadstate->stackDepth == 0 && !frameInfo) ||
michael@0:                 (jsdthreadstate->stackDepth == 1 && frameInfo &&
michael@0:                  frameInfo->jsdscript && !JSD_IS_DEBUG_ENABLED(jsdc, frameInfo->jsdscript)))
michael@0:             {
michael@0:                 /*
michael@0:                  * if we failed to create the first frame, or the top frame
michael@0:                  * is not enabled for debugging, fail the entire thread state.
michael@0:                  */
michael@0:                 JS_INIT_CLIST(&jsdthreadstate->links);
michael@0:                 JS_EndRequest(jsdthreadstate->context);
michael@0:                 jsd_DestroyThreadState(jsdc, jsdthreadstate);
michael@0:                 return nullptr;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         ++iter;
michael@0:     }
michael@0:     JS_EndRequest(jsdthreadstate->context);
michael@0: 
michael@0:     if (jsdthreadstate->stackDepth == 0)
michael@0:     {
michael@0:         free(jsdthreadstate);
michael@0:         return nullptr;
michael@0:     }
michael@0:     
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     JS_APPEND_LINK(&jsdthreadstate->links, &jsdc->threadsStates);
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return jsdthreadstate;
michael@0: }
michael@0: 
michael@0: void
michael@0: jsd_DestroyThreadState(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
michael@0: {
michael@0:     JSDStackFrameInfo* jsdframe;
michael@0:     JSCList* list;
michael@0: 
michael@0:     MOZ_ASSERT(jsdthreadstate);
michael@0:     MOZ_ASSERT(JSD_CURRENT_THREAD() == jsdthreadstate->thread);
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     JS_REMOVE_LINK(&jsdthreadstate->links);
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     list = &jsdthreadstate->stack;
michael@0:     while( (JSDStackFrameInfo*)list != (jsdframe = (JSDStackFrameInfo*)list->next) )
michael@0:     {
michael@0:         JS_REMOVE_LINK(&jsdframe->links);
michael@0:         _destroyFrame(jsdframe);
michael@0:     }
michael@0:     free(jsdthreadstate);
michael@0: }
michael@0: 
michael@0: unsigned
michael@0: jsd_GetCountOfStackFrames(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
michael@0: {
michael@0:     unsigned count = 0;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidThreadState(jsdc, jsdthreadstate) )
michael@0:         count = jsdthreadstate->stackDepth;
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return count;
michael@0: }
michael@0: 
michael@0: JSDStackFrameInfo*
michael@0: jsd_GetStackFrame(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
michael@0: {
michael@0:     JSDStackFrameInfo* jsdframe = nullptr;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidThreadState(jsdc, jsdthreadstate) )
michael@0:         jsdframe = (JSDStackFrameInfo*) JS_LIST_HEAD(&jsdthreadstate->stack);
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return jsdframe;
michael@0: }
michael@0: 
michael@0: JSContext *
michael@0: jsd_GetJSContext (JSDContext* jsdc, JSDThreadState* jsdthreadstate)
michael@0: {
michael@0:     JSContext* cx = nullptr;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     if( jsd_IsValidThreadState(jsdc, jsdthreadstate) )
michael@0:         cx = jsdthreadstate->context;
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return cx;
michael@0: }
michael@0:     
michael@0: JSDStackFrameInfo*
michael@0: jsd_GetCallingStackFrame(JSDContext* jsdc, 
michael@0:                          JSDThreadState* jsdthreadstate,
michael@0:                          JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     JSDStackFrameInfo* nextjsdframe = nullptr;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:         if( JS_LIST_HEAD(&jsdframe->links) != &jsdframe->jsdthreadstate->stack )
michael@0:             nextjsdframe = (JSDStackFrameInfo*) JS_LIST_HEAD(&jsdframe->links);
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return nextjsdframe;
michael@0: }
michael@0: 
michael@0: JSDScript*
michael@0: jsd_GetScriptForStackFrame(JSDContext* jsdc, 
michael@0:                            JSDThreadState* jsdthreadstate,
michael@0:                            JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     JSDScript* jsdscript = nullptr;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:         jsdscript = jsdframe->jsdscript;
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return jsdscript;
michael@0: }
michael@0: 
michael@0: uintptr_t
michael@0: jsd_GetPCForStackFrame(JSDContext* jsdc, 
michael@0:                        JSDThreadState* jsdthreadstate,
michael@0:                        JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     uintptr_t pc = 0;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:         pc = jsdframe->pc;
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return pc;
michael@0: }
michael@0: 
michael@0: JSDValue*
michael@0: jsd_GetCallObjectForStackFrame(JSDContext* jsdc, 
michael@0:                                JSDThreadState* jsdthreadstate,
michael@0:                                JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     JSObject* obj;
michael@0:     JSDValue* jsdval = nullptr;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:     {
michael@0:         obj = jsdframe->frame.callObject(jsdthreadstate->context);
michael@0:         if(obj)                                                             
michael@0:             jsdval = JSD_NewValue(jsdc, OBJECT_TO_JSVAL(obj));              
michael@0:     }
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return jsdval;
michael@0: }
michael@0: 
michael@0: JSDValue*
michael@0: jsd_GetScopeChainForStackFrame(JSDContext* jsdc, 
michael@0:                                JSDThreadState* jsdthreadstate,
michael@0:                                JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     JS::RootedObject obj(jsdthreadstate->context);
michael@0:     JSDValue* jsdval = nullptr;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:     {
michael@0:         JS_BeginRequest(jsdthreadstate->context);
michael@0:         obj = jsdframe->frame.scopeChain(jsdthreadstate->context);
michael@0:         JS_EndRequest(jsdthreadstate->context);
michael@0:         if(obj)
michael@0:             jsdval = JSD_NewValue(jsdc, OBJECT_TO_JSVAL(obj));
michael@0:     }
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     return jsdval;
michael@0: }
michael@0: 
michael@0: JSDValue*
michael@0: jsd_GetThisForStackFrame(JSDContext* jsdc, 
michael@0:                          JSDThreadState* jsdthreadstate,
michael@0:                          JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     JSDValue* jsdval = nullptr;
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:     {
michael@0:         bool ok;
michael@0:         JS::RootedValue thisval(jsdthreadstate->context);
michael@0:         JS_BeginRequest(jsdthreadstate->context);
michael@0:         ok = jsdframe->frame.getThisValue(jsdthreadstate->context, &thisval);
michael@0:         JS_EndRequest(jsdthreadstate->context);
michael@0:         if(ok)
michael@0:             jsdval = JSD_NewValue(jsdc, thisval);
michael@0:     }
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0:     return jsdval;
michael@0: }
michael@0: 
michael@0: JSString*
michael@0: jsd_GetIdForStackFrame(JSDContext* jsdc, 
michael@0:                        JSDThreadState* jsdthreadstate,
michael@0:                        JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     JSString *rv = nullptr;
michael@0:     
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:     {
michael@0:         JSFunction *fun = jsdframe->frame.maybeFun();
michael@0:         if( fun )
michael@0:         {
michael@0:             rv = JS_GetFunctionId (fun);
michael@0: 
michael@0:             /*
michael@0:              * For compatibility we return "anonymous", not an empty string
michael@0:              * here.
michael@0:              */
michael@0:             if( !rv )
michael@0:                 rv = JS_GetAnonymousString(jsdc->jsrt);
michael@0:         }
michael@0:     }
michael@0:     
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0:     return rv;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_IsStackFrameDebugger(JSDContext* jsdc, 
michael@0:                          JSDThreadState* jsdthreadstate,
michael@0:                          JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     bool rv = true;
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:     {
michael@0:         rv = jsdframe->frame.isDebuggerFrame();
michael@0:     }
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0:     return rv;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_IsStackFrameConstructing(JSDContext* jsdc, 
michael@0:                              JSDThreadState* jsdthreadstate,
michael@0:                              JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     bool rv = true;
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
michael@0:     {
michael@0:         rv = jsdframe->isConstructing;
michael@0:     }
michael@0: 
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0:     return rv;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_EvaluateUCScriptInStackFrame(JSDContext* jsdc, 
michael@0:                                  JSDThreadState* jsdthreadstate,
michael@0:                                  JSDStackFrameInfo* jsdframe,
michael@0:                                  const jschar *bytes, unsigned length,
michael@0:                                  const char *filename, unsigned lineno,
michael@0:                                  bool eatExceptions, JS::MutableHandleValue rval)
michael@0: {
michael@0:     bool retval;
michael@0:     bool valid;
michael@0:     JSExceptionState* exceptionState = nullptr;
michael@0: 
michael@0:     MOZ_ASSERT(JSD_CURRENT_THREAD() == jsdthreadstate->thread);
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     valid = jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe);
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( ! valid )
michael@0:         return false;
michael@0: 
michael@0:     AutoPushJSContext cx(jsdthreadstate->context);
michael@0:     MOZ_ASSERT(cx);
michael@0: 
michael@0:     if (eatExceptions)
michael@0:         exceptionState = JS_SaveExceptionState(cx);
michael@0:     JS_ClearPendingException(cx);
michael@0:     jsd_StartingEvalUsingFilename(jsdc, filename);
michael@0:     retval = jsdframe->frame.evaluateUCInStackFrame(cx, bytes, length, filename, lineno,
michael@0:                                                     rval);
michael@0:     jsd_FinishedEvalUsingFilename(jsdc, filename);
michael@0:     if (eatExceptions)
michael@0:         JS_RestoreExceptionState(cx, exceptionState);
michael@0: 
michael@0:     return retval;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_EvaluateScriptInStackFrame(JSDContext* jsdc, 
michael@0:                                JSDThreadState* jsdthreadstate,
michael@0:                                JSDStackFrameInfo* jsdframe,
michael@0:                                const char *bytes, unsigned length,
michael@0:                                const char *filename, unsigned lineno,
michael@0:                                bool eatExceptions, JS::MutableHandleValue rval)
michael@0: {
michael@0:     bool retval;
michael@0:     bool valid;
michael@0:     JSExceptionState* exceptionState = nullptr;
michael@0: 
michael@0:     MOZ_ASSERT(JSD_CURRENT_THREAD() == jsdthreadstate->thread);
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     valid = jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe);
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if (!valid)
michael@0:         return false;
michael@0: 
michael@0:     AutoPushJSContext cx(jsdthreadstate->context);
michael@0:     MOZ_ASSERT(cx);
michael@0: 
michael@0:     if (eatExceptions)
michael@0:         exceptionState = JS_SaveExceptionState(cx);
michael@0:     JS_ClearPendingException(cx);
michael@0:     jsd_StartingEvalUsingFilename(jsdc, filename);
michael@0:     retval = jsdframe->frame.evaluateInStackFrame(cx, bytes, length, filename, lineno,
michael@0:                                                   rval);
michael@0:     jsd_FinishedEvalUsingFilename(jsdc, filename);
michael@0:     if (eatExceptions)
michael@0:         JS_RestoreExceptionState(cx, exceptionState);
michael@0: 
michael@0:     return retval;
michael@0: }
michael@0: 
michael@0: JSString*
michael@0: jsd_ValToStringInStackFrame(JSDContext* jsdc, 
michael@0:                             JSDThreadState* jsdthreadstate,
michael@0:                             JSDStackFrameInfo* jsdframe,
michael@0:                             jsval val)
michael@0: {
michael@0:     bool valid;
michael@0:     JSExceptionState* exceptionState;
michael@0:     JSContext *cx = jsdthreadstate->context;
michael@0: 
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     valid = jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe);
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0: 
michael@0:     if( ! valid )
michael@0:         return nullptr;
michael@0: 
michael@0:     JS::RootedString retval(cx);
michael@0:     MOZ_ASSERT(cx);
michael@0:     JS::RootedValue v(cx, val);
michael@0:     {
michael@0:         AutoPushJSContext cx(jsdthreadstate->context);
michael@0:         exceptionState = JS_SaveExceptionState(cx);
michael@0:         retval = JS::ToString(cx, v);
michael@0:         JS_RestoreExceptionState(cx, exceptionState);
michael@0:     }
michael@0: 
michael@0:     return retval;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_IsValidThreadState(JSDContext*        jsdc, 
michael@0:                        JSDThreadState*    jsdthreadstate)
michael@0: {
michael@0:     JSDThreadState *cur;
michael@0: 
michael@0:     MOZ_ASSERT( JSD_THREADSTATES_LOCKED(jsdc) );
michael@0: 
michael@0:     for( cur = (JSDThreadState*)jsdc->threadsStates.next;
michael@0:          cur != (JSDThreadState*)&jsdc->threadsStates;
michael@0:          cur = (JSDThreadState*)cur->links.next ) 
michael@0:     {
michael@0:         if( cur == jsdthreadstate )
michael@0:             return true;
michael@0:     }
michael@0:     return false;
michael@0: }    
michael@0: 
michael@0: bool
michael@0: jsd_IsValidFrameInThreadState(JSDContext*        jsdc, 
michael@0:                               JSDThreadState*    jsdthreadstate,
michael@0:                               JSDStackFrameInfo* jsdframe)
michael@0: {
michael@0:     MOZ_ASSERT(JSD_THREADSTATES_LOCKED(jsdc));
michael@0: 
michael@0:     if( ! jsd_IsValidThreadState(jsdc, jsdthreadstate) )
michael@0:         return false;
michael@0:     if( jsdframe->jsdthreadstate != jsdthreadstate )
michael@0:         return false;
michael@0: 
michael@0:     JSD_ASSERT_VALID_THREAD_STATE(jsdthreadstate);
michael@0:     JSD_ASSERT_VALID_STACK_FRAME(jsdframe);
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: static JSContext*
michael@0: _getContextForThreadState(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
michael@0: {
michael@0:     bool valid;
michael@0:     JSD_LOCK_THREADSTATES(jsdc);
michael@0:     valid = jsd_IsValidThreadState(jsdc, jsdthreadstate);
michael@0:     JSD_UNLOCK_THREADSTATES(jsdc);
michael@0:     if( valid )
michael@0:         return jsdthreadstate->context;
michael@0:     return nullptr;
michael@0: }
michael@0: 
michael@0: JSDValue*
michael@0: jsd_GetException(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
michael@0: {
michael@0:     JSContext* cx;
michael@0:     if(!(cx = _getContextForThreadState(jsdc, jsdthreadstate)))
michael@0:         return nullptr;
michael@0: 
michael@0:     JS::RootedValue val(cx);
michael@0:     if(JS_GetPendingException(cx, &val))
michael@0:         return jsd_NewValue(jsdc, val);
michael@0:     return nullptr;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_SetException(JSDContext* jsdc, JSDThreadState* jsdthreadstate,
michael@0:                  JSDValue* jsdval)
michael@0: {
michael@0:     JSContext* cx;
michael@0: 
michael@0:     if(!(cx = _getContextForThreadState(jsdc, jsdthreadstate)))
michael@0:         return false;
michael@0: 
michael@0:     if(jsdval) {
michael@0:         JS::RootedValue exn(cx, JSD_GetValueWrappedJSVal(jsdc, jsdval));
michael@0:         JS_SetPendingException(cx, exn);
michael@0:     } else {
michael@0:         JS_ClearPendingException(cx);
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: