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 - Hook support
michael@0:  */
michael@0: 
michael@0: #include "jsd.h"
michael@0: 
michael@0: JSTrapStatus
michael@0: jsd_InterruptHandler(JSContext *cx, JSScript *script, jsbytecode *pc, jsval *rval,
michael@0:                      void *closure)
michael@0: {
michael@0:     JSDScript*      jsdscript;
michael@0:     JSDContext*     jsdc = (JSDContext*) closure;
michael@0:     JSD_ExecutionHookProc hook;
michael@0:     void*                 hookData;
michael@0: 
michael@0:     if( ! jsdc || ! jsdc->inited )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     if( JSD_IS_DANGEROUS_THREAD(jsdc) )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     /* local in case jsdc->interruptHook gets cleared on another thread */
michael@0:     JSD_LOCK();
michael@0:     hook     = jsdc->interruptHook;
michael@0:     hookData = jsdc->interruptHookData;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     if (!hook)
michael@0:         return JSTRAP_CONTINUE;
michael@0:     
michael@0:     JSD_LOCK_SCRIPTS(jsdc);
michael@0:     jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, script, JSNullFramePtr());
michael@0:     JSD_UNLOCK_SCRIPTS(jsdc);
michael@0:     if( ! jsdscript )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     return jsd_CallExecutionHook(jsdc, cx, JSD_HOOK_INTERRUPTED,
michael@0:                                  hook, hookData, rval);
michael@0: }
michael@0: 
michael@0: JSTrapStatus
michael@0: jsd_DebuggerHandler(JSContext *cx, JSScript *script, jsbytecode *pc,
michael@0:                     jsval *rval, void *closure)
michael@0: {
michael@0:     JSDScript*      jsdscript;
michael@0:     JSDContext*     jsdc = (JSDContext*) closure;
michael@0:     JSD_ExecutionHookProc hook;
michael@0:     void*                 hookData;
michael@0: 
michael@0:     if( ! jsdc || ! jsdc->inited )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     if( JSD_IS_DANGEROUS_THREAD(jsdc) )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     /* local in case jsdc->debuggerHook gets cleared on another thread */
michael@0:     JSD_LOCK();
michael@0:     hook     = jsdc->debuggerHook;
michael@0:     hookData = jsdc->debuggerHookData;
michael@0:     JSD_UNLOCK();
michael@0:     if(!hook)
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     JSD_LOCK_SCRIPTS(jsdc);
michael@0:     jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, script, JSNullFramePtr());
michael@0:     JSD_UNLOCK_SCRIPTS(jsdc);
michael@0:     if( ! jsdscript )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     return jsd_CallExecutionHook(jsdc, cx, JSD_HOOK_DEBUGGER_KEYWORD,
michael@0:                                  hook, hookData, rval);
michael@0: }
michael@0: 
michael@0: 
michael@0: JSTrapStatus
michael@0: jsd_ThrowHandler(JSContext *cx, JSScript *script, jsbytecode *pc,
michael@0:                  jsval *rvalArg, void *closure)
michael@0: {
michael@0:     JSDScript*      jsdscript;
michael@0:     JSDContext*     jsdc = (JSDContext*) closure;
michael@0:     JSD_ExecutionHookProc hook;
michael@0:     void*                 hookData;
michael@0: 
michael@0:     if( ! jsdc || ! jsdc->inited )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     if( JSD_IS_DANGEROUS_THREAD(jsdc) )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     /* local in case jsdc->throwHook gets cleared on another thread */
michael@0:     JSD_LOCK();
michael@0:     hook     = jsdc->throwHook;
michael@0:     hookData = jsdc->throwHookData;
michael@0:     JSD_UNLOCK();
michael@0:     if (!hook)
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     JSD_LOCK_SCRIPTS(jsdc);
michael@0:     jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, script, JSNullFramePtr());
michael@0:     JSD_UNLOCK_SCRIPTS(jsdc);
michael@0:     if( ! jsdscript )
michael@0:         return JSTRAP_CONTINUE;
michael@0: 
michael@0:     JS::RootedValue rval(cx);
michael@0:     JS_GetPendingException(cx, &rval);
michael@0: 
michael@0:     JSTrapStatus result = jsd_CallExecutionHook(jsdc, cx, JSD_HOOK_THROW,
michael@0:                                                 hook, hookData, rval.address());
michael@0:     *rvalArg = rval;
michael@0:     return result;
michael@0: }
michael@0: 
michael@0: JSTrapStatus
michael@0: jsd_CallExecutionHook(JSDContext* jsdc,
michael@0:                       JSContext *cx,
michael@0:                       unsigned type,
michael@0:                       JSD_ExecutionHookProc hook,
michael@0:                       void* hookData,
michael@0:                       jsval* rval)
michael@0: {
michael@0:     unsigned hookanswer = JSD_HOOK_THROW == type ? 
michael@0:                             JSD_HOOK_RETURN_CONTINUE_THROW :
michael@0:                             JSD_HOOK_RETURN_CONTINUE;
michael@0:     JSDThreadState* jsdthreadstate;
michael@0: 
michael@0:     if(hook && nullptr != (jsdthreadstate = jsd_NewThreadState(jsdc, cx)))
michael@0:     {
michael@0:         if ((type != JSD_HOOK_THROW && type != JSD_HOOK_INTERRUPTED) ||
michael@0:             jsdc->flags & JSD_MASK_TOP_FRAME_ONLY ||
michael@0:             !(jsdthreadstate->flags & TS_HAS_DISABLED_FRAME))
michael@0:         {
michael@0:             /*
michael@0:              * if it's not a throw and it's not an interrupt,
michael@0:              * or we're only masking the top frame,
michael@0:              * or there are no disabled frames in this stack,
michael@0:              * then call out.
michael@0:              */
michael@0:              hookanswer = hook(jsdc, jsdthreadstate, type, hookData, rval);
michael@0:              jsd_DestroyThreadState(jsdc, jsdthreadstate);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     switch(hookanswer)
michael@0:     {
michael@0:         case JSD_HOOK_RETURN_ABORT:
michael@0:         case JSD_HOOK_RETURN_HOOK_ERROR:
michael@0:             return JSTRAP_ERROR;
michael@0:         case JSD_HOOK_RETURN_RET_WITH_VAL:
michael@0:             return JSTRAP_RETURN;
michael@0:         case JSD_HOOK_RETURN_THROW_WITH_VAL:
michael@0:             return JSTRAP_THROW;
michael@0:         case JSD_HOOK_RETURN_CONTINUE:
michael@0:             break;
michael@0:         case JSD_HOOK_RETURN_CONTINUE_THROW:
michael@0:             /* only makes sense for jsd_ThrowHandler (which init'd rval) */
michael@0:             MOZ_ASSERT(JSD_HOOK_THROW == type);
michael@0:             return JSTRAP_THROW;
michael@0:         default:
michael@0:             MOZ_ASSERT(0);
michael@0:             break;
michael@0:     }
michael@0:     return JSTRAP_CONTINUE;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_CallCallHook (JSDContext* jsdc,
michael@0:                   JSContext *cx,
michael@0:                   unsigned type,
michael@0:                   JSD_CallHookProc hook,
michael@0:                   void* hookData)
michael@0: {
michael@0:     bool hookanswer;
michael@0:     JSDThreadState*  jsdthreadstate;
michael@0:     
michael@0:     hookanswer = false;
michael@0:     if(hook && nullptr != (jsdthreadstate = jsd_NewThreadState(jsdc, cx)))
michael@0:     {
michael@0:         hookanswer = hook(jsdc, jsdthreadstate, type, hookData);
michael@0:         jsd_DestroyThreadState(jsdc, jsdthreadstate);
michael@0:     }
michael@0: 
michael@0:     return hookanswer;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_SetInterruptHook(JSDContext*           jsdc,
michael@0:                      JSD_ExecutionHookProc hook,
michael@0:                      void*                 callerdata)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->interruptHookData  = callerdata;
michael@0:     jsdc->interruptHook      = hook;
michael@0:     JS_SetInterrupt(jsdc->jsrt, jsd_InterruptHandler, (void*) jsdc);
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_ClearInterruptHook(JSDContext* jsdc)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     JS_ClearInterrupt(jsdc->jsrt, nullptr, nullptr);
michael@0:     jsdc->interruptHook      = nullptr;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_SetDebugBreakHook(JSDContext*           jsdc,
michael@0:                       JSD_ExecutionHookProc hook,
michael@0:                       void*                 callerdata)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->debugBreakHookData  = callerdata;
michael@0:     jsdc->debugBreakHook      = hook;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_ClearDebugBreakHook(JSDContext* jsdc)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->debugBreakHook      = nullptr;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_SetDebuggerHook(JSDContext*           jsdc,
michael@0:                       JSD_ExecutionHookProc hook,
michael@0:                       void*                 callerdata)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->debuggerHookData  = callerdata;
michael@0:     jsdc->debuggerHook      = hook;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_ClearDebuggerHook(JSDContext* jsdc)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->debuggerHook      = nullptr;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_SetThrowHook(JSDContext*           jsdc,
michael@0:                  JSD_ExecutionHookProc hook,
michael@0:                  void*                 callerdata)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->throwHookData  = callerdata;
michael@0:     jsdc->throwHook      = hook;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_ClearThrowHook(JSDContext* jsdc)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->throwHook      = nullptr;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_SetFunctionHook(JSDContext*      jsdc,
michael@0:                     JSD_CallHookProc hook,
michael@0:                     void*            callerdata)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->functionHookData  = callerdata;
michael@0:     jsdc->functionHook      = hook;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_ClearFunctionHook(JSDContext* jsdc)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->functionHook      = nullptr;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_SetTopLevelHook(JSDContext*      jsdc,
michael@0:                     JSD_CallHookProc hook,
michael@0:                     void*            callerdata)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->toplevelHookData  = callerdata;
michael@0:     jsdc->toplevelHook      = hook;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: jsd_ClearTopLevelHook(JSDContext* jsdc)
michael@0: {
michael@0:     JSD_LOCK();
michael@0:     jsdc->toplevelHook      = nullptr;
michael@0:     JSD_UNLOCK();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: