mirror of
https://github.com/mozilla/gecko-dev.git
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370 lines
9.3 KiB
C
370 lines
9.3 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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** JavaScript Debugger Navigator API - Call Stack support
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*/
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#include "jsd.h"
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#ifdef NSPR20
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#ifdef XP_MAC
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#include "prpriv.h"
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#else
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#include "private/prpriv.h"
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#endif
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#endif
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#ifdef DEBUG
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void JSD_ASSERT_VALID_THREAD_STATE( JSDThreadState* jsdthreadstate )
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{
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PR_ASSERT(jsdthreadstate);
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PR_ASSERT(jsdthreadstate->stackDepth > 0);
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}
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void JSD_ASSERT_VALID_STACK_FRAME( JSDStackFrameInfo* jsdframe )
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{
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PR_ASSERT(jsdframe);
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PR_ASSERT(jsdframe->jsdthreadstate);
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}
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#endif
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static JSDStackFrameInfo*
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AddNewFrame( JSDContext* jsdc,
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JSDThreadState* jsdthreadstate,
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JSScript* script,
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prword_t pc,
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JSObject* object,
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JSObject* thisp,
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JSStackFrame* fp )
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{
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JSDStackFrameInfo* jsdframe;
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JSDScript* jsdscript;
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jsdscript = jsd_FindJSDScript(jsdc, script);
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if( ! jsdscript )
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return NULL;
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jsdframe = PR_NEWZAP(JSDStackFrameInfo);
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if( ! jsdframe )
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return NULL;
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jsdframe->jsdthreadstate = jsdthreadstate;
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jsdframe->jsdscript = jsdscript ;
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jsdframe->pc = pc ;
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jsdframe->object = object ;
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jsdframe->thisp = thisp ;
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jsdframe->fp = fp ;
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PR_APPEND_LINK(&jsdframe->links, &jsdthreadstate->stack);
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jsdthreadstate->stackDepth++;
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return jsdframe;
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}
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static void
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DestroyFrame(JSDStackFrameInfo* jsdframe)
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{
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/* kill any alloc'd objects in frame here... */
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PR_FREEIF(jsdframe);
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}
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JSDThreadState*
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jsd_NewThreadState(JSDContext* jsdc, JSContext *cx )
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{
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JSDThreadState* jsdthreadstate;
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JSStackFrame * iter = NULL;
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JSStackFrame * fp;
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jsdthreadstate = PR_NEWZAP(JSDThreadState);
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if( ! jsdthreadstate )
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return NULL;
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jsdthreadstate->context = cx;
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jsdthreadstate->thread = PR_CurrentThread();
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PR_INIT_CLIST(&jsdthreadstate->stack);
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jsdthreadstate->stackDepth = 0;
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while( NULL != (fp = JS_FrameIterator(cx, &iter)) )
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{
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JSScript* script = JS_GetFrameScript(cx, fp);
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prword_t pc = (prword_t) JS_GetFramePC(cx, fp);
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if( ! script || ! pc || JS_IsNativeFrame(cx, fp) )
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continue;
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AddNewFrame( jsdc, jsdthreadstate, script, pc,
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JS_GetFrameObject(cx, fp),
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JS_GetFrameThis(cx, fp), fp );
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}
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jsd_LockThreadsStates(jsdc);
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PR_APPEND_LINK(&jsdthreadstate->links, &jsdc->threadsStates);
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jsd_UnlockThreadStates(jsdc);
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return jsdthreadstate;
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}
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void
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jsd_DestroyThreadState(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
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{
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JSDStackFrameInfo* jsdframe;
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PRCList* list;
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int64 i;
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#ifndef NSPR20
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LL_I2L(i,100);
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#endif
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/* we need to wait if someone else is using the threadstate */
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jsd_LockThreadsStates(jsdc);
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while( jsdthreadstate->wait )
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{
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jsd_UnlockThreadStates(jsdc);
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#ifndef NSPR20
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PR_Sleep(i);
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#else
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PR_Sleep(PR_MicrosecondsToInterval(100));
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#endif
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jsd_LockThreadsStates(jsdc);
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}
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PR_REMOVE_LINK(&jsdthreadstate->links);
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jsd_UnlockThreadStates(jsdc);
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list = &jsdthreadstate->stack;
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while( (JSDStackFrameInfo*)list != (jsdframe = (JSDStackFrameInfo*)list->next) )
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{
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PR_REMOVE_LINK(&jsdframe->links);
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DestroyFrame(jsdframe);
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}
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PR_FREEIF(jsdthreadstate);
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}
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PRUintn
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jsd_GetCountOfStackFrames(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
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{
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PRUintn count = 0;
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jsd_LockThreadsStates(jsdc);
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if( jsd_IsValidThreadState(jsdc, jsdthreadstate) )
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count = jsdthreadstate->stackDepth;
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jsd_UnlockThreadStates(jsdc);
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return count;
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}
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JSDStackFrameInfo*
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jsd_GetStackFrame(JSDContext* jsdc, JSDThreadState* jsdthreadstate)
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{
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JSDStackFrameInfo* jsdframe = NULL;
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jsd_LockThreadsStates(jsdc);
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if( jsd_IsValidThreadState(jsdc, jsdthreadstate) )
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jsdframe = (JSDStackFrameInfo*) PR_LIST_HEAD(&jsdthreadstate->stack);
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jsd_UnlockThreadStates(jsdc);
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return jsdframe;
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}
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JSDStackFrameInfo*
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jsd_GetCallingStackFrame(JSDContext* jsdc,
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JSDThreadState* jsdthreadstate,
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JSDStackFrameInfo* jsdframe)
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{
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JSDStackFrameInfo* nextjsdframe = NULL;
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jsd_LockThreadsStates(jsdc);
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if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
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if( PR_LIST_HEAD(&jsdframe->links) != &jsdframe->jsdthreadstate->stack )
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nextjsdframe = (JSDStackFrameInfo*) PR_LIST_HEAD(&jsdframe->links);
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jsd_UnlockThreadStates(jsdc);
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return nextjsdframe;
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}
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JSDScript*
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jsd_GetScriptForStackFrame(JSDContext* jsdc,
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JSDThreadState* jsdthreadstate,
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JSDStackFrameInfo* jsdframe)
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{
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JSDScript* jsdscript = NULL;
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jsd_LockThreadsStates(jsdc);
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if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
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jsdscript = jsdframe->jsdscript;
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jsd_UnlockThreadStates(jsdc);
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return jsdscript;
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}
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prword_t
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jsd_GetPCForStackFrame(JSDContext* jsdc,
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JSDThreadState* jsdthreadstate,
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JSDStackFrameInfo* jsdframe)
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{
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prword_t pc = 0;
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jsd_LockThreadsStates(jsdc);
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if( jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
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pc = jsdframe->pc;
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jsd_UnlockThreadStates(jsdc);
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return pc;
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}
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JSBool
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jsd_EvaluateScriptInStackFrame(JSDContext* jsdc,
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JSDThreadState* jsdthreadstate,
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JSDStackFrameInfo* jsdframe,
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const char *bytes, PRUintn length,
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const char *filename, PRUintn lineno, jsval *rval)
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{
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JSBool retval;
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jsd_LockThreadsStates(jsdc);
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if( ! jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
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{
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jsd_UnlockThreadStates(jsdc);
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return JS_FALSE;
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}
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jsdthreadstate->wait++ ;
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jsd_UnlockThreadStates(jsdc);
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retval = JS_EvaluateInStackFrame(jsdthreadstate->context, jsdframe->fp,
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bytes, length, filename, lineno, rval);
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jsd_LockThreadsStates(jsdc);
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jsdthreadstate->wait-- ;
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jsd_UnlockThreadStates(jsdc);
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return retval;
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}
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JSString*
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jsd_ValToStringInStackFrame(JSDContext* jsdc,
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JSDThreadState* jsdthreadstate,
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JSDStackFrameInfo* jsdframe,
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jsval val)
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{
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JSString* jsstr = NULL;
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jsd_LockThreadsStates(jsdc);
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if( ! jsd_IsValidFrameInThreadState(jsdc, jsdthreadstate, jsdframe) )
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{
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jsd_UnlockThreadStates(jsdc);
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return NULL;
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}
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jsdthreadstate->wait++ ;
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jsd_UnlockThreadStates(jsdc);
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jsstr = JS_ValueToString(jsdthreadstate->context, val);
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jsd_LockThreadsStates(jsdc);
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jsdthreadstate->wait-- ;
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jsd_UnlockThreadStates(jsdc);
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return jsstr;
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}
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/***************************************************************************/
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#ifndef JSD_SIMULATION
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static PRMonitor *jsd_threadstate_mon = NULL;
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#endif /* JSD_SIMULATION */
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void
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jsd_LockThreadsStates(JSDContext* jsdc)
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{
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#ifndef JSD_SIMULATION
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if (jsd_threadstate_mon == NULL)
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jsd_threadstate_mon = PR_NewNamedMonitor("jsd-threadstate-monitor");
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PR_EnterMonitor(jsd_threadstate_mon);
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#endif /* JSD_SIMULATION */
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}
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void
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jsd_UnlockThreadStates(JSDContext* jsdc)
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{
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#ifndef JSD_SIMULATION
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PR_ExitMonitor(jsd_threadstate_mon);
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#endif /* JSD_SIMULATION */
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}
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JSBool
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jsd_ThreadStatesIsLocked(JSDContext* jsdc)
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{
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#ifndef JSD_SIMULATION
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return jsd_threadstate_mon && PR_InMonitor(jsd_threadstate_mon);
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#else
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return JS_TRUE;
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#endif /* JSD_SIMULATION */
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}
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JSBool
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jsd_IsValidThreadState(JSDContext* jsdc,
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JSDThreadState* jsdthreadstate )
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{
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JSDThreadState *cur;
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PR_ASSERT( jsd_ThreadStatesIsLocked(jsdc) );
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for (cur = (JSDThreadState*)jsdc->threadsStates.next;
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cur != (JSDThreadState*)&jsdc->threadsStates;
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cur = (JSDThreadState*)cur->links.next )
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{
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if( cur == jsdthreadstate )
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return JS_TRUE;
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}
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return JS_FALSE;
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}
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JSBool
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jsd_IsValidFrameInThreadState(JSDContext* jsdc,
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JSDThreadState* jsdthreadstate,
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JSDStackFrameInfo* jsdframe )
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{
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PR_ASSERT( jsd_ThreadStatesIsLocked(jsdc) );
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if( ! jsd_IsValidThreadState(jsdc, jsdthreadstate) )
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return JS_FALSE;
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if( jsdframe->jsdthreadstate != jsdthreadstate )
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return JS_FALSE;
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JSD_ASSERT_VALID_THREAD_STATE(jsdthreadstate);
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JSD_ASSERT_VALID_STACK_FRAME(jsdframe);
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return JS_TRUE;
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}
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