gecko-dev/js/jsd/jsd_scpt.c

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C

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* JavaScript Debugging support - Script support
*/
#include "jsd.h"
/* Comment this out to disable (NT specific) dumping as we go */
/*
** #ifdef DEBUG
** #define JSD_DUMP 1
** #endif
*/
#define NOT_SET_YET -1
/***************************************************************************/
#ifdef DEBUG
void JSD_ASSERT_VALID_SCRIPT(JSDScript* jsdscript)
{
JS_ASSERT(jsdscript);
JS_ASSERT(jsdscript->script);
}
void JSD_ASSERT_VALID_EXEC_HOOK(JSDExecHook* jsdhook)
{
JS_ASSERT(jsdhook);
JS_ASSERT(jsdhook->hook);
}
#endif
#ifdef LIVEWIRE
static JSBool
HasFileExtention(const char* name, const char* ext)
{
int i;
int len = strlen(ext);
const char* p = strrchr(name,'.');
if( !p )
return JS_FALSE;
p++;
for(i = 0; i < len; i++ )
{
JS_ASSERT(islower(ext[i]));
if( 0 == p[i] || tolower(p[i]) != ext[i] )
return JS_FALSE;
}
if( 0 != p[i] )
return JS_FALSE;
return JS_TRUE;
}
#endif /* LIVEWIRE */
static JSDScript*
_newJSDScript(JSDContext* jsdc,
JSContext *cx,
JSScript *script,
JSFunction* function)
{
JSDScript* jsdscript;
uintN lineno;
const char* raw_filename;
JS_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
/* these are inlined javascript: urls and we can't handle them now */
lineno = (uintN) JS_GetScriptBaseLineNumber(cx, script);
if( lineno == 0 )
return NULL;
jsdscript = (JSDScript*) calloc(1, sizeof(JSDScript));
if( ! jsdscript )
return NULL;
raw_filename = JS_GetScriptFilename(cx,script);
JS_APPEND_LINK(&jsdscript->links, &jsdc->scripts);
jsdscript->jsdc = jsdc;
jsdscript->script = script;
jsdscript->function = function;
jsdscript->lineBase = lineno;
jsdscript->lineExtent = (uintN)NOT_SET_YET;
#ifndef LIVEWIRE
jsdscript->url = (char*) jsd_BuildNormalizedURL(raw_filename);
#else
jsdscript->app = LWDBG_GetCurrentApp();
if( jsdscript->app && raw_filename )
{
jsdscript->url = jsdlw_BuildAppRelativeFilename(jsdscript->app, raw_filename);
if( function )
{
jsdscript->lwscript =
LWDBG_GetScriptOfFunction(jsdscript->app,
JS_GetFunctionName(function));
/* also, make sure this file is added to filelist if is .js file */
if( HasFileExtention(raw_filename,"js") ||
HasFileExtention(raw_filename,"sjs") )
{
jsdlw_PreLoadSource(jsdc, jsdscript->app, raw_filename, JS_FALSE);
}
}
else
{
jsdscript->lwscript = LWDBG_GetCurrentTopLevelScript();
}
}
#endif
JS_INIT_CLIST(&jsdscript->hooks);
return jsdscript;
}
static void
_destroyJSDScript(JSDContext* jsdc,
JSDScript* jsdscript)
{
JS_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
/* destroy all hooks */
jsd_ClearAllExecutionHooksForScript(jsdc, jsdscript);
JS_REMOVE_LINK(&jsdscript->links);
if(jsdscript->url)
free(jsdscript->url);
if(jsdscript)
free(jsdscript);
}
/***************************************************************************/
#ifdef JSD_DUMP
static void
_dumpJSDScript(JSDContext* jsdc, JSDScript* jsdscript, const char* leadingtext)
{
const char* name;
const char* fun;
uintN base;
uintN extent;
char Buf[256];
name = jsd_GetScriptFilename(jsdc, jsdscript);
fun = jsd_GetScriptFunctionName(jsdc, jsdscript);
base = jsd_GetScriptBaseLineNumber(jsdc, jsdscript);
extent = jsd_GetScriptLineExtent(jsdc, jsdscript);
sprintf( Buf, "%sscript=%08X, %s, %s, %d-%d\n",
leadingtext,
(unsigned) jsdscript->script,
name ? name : "no URL",
fun ? fun : "no fun",
base, base + extent - 1 );
OutputDebugString( Buf );
}
static void
_dumpJSDScriptList( JSDContext* jsdc )
{
JSDScript* iterp = NULL;
JSDScript* jsdscript = NULL;
OutputDebugString( "*** JSDScriptDump\n" );
while( NULL != (jsdscript = jsd_IterateScripts(jsdc, &iterp)) )
_dumpJSDScript( jsdc, jsdscript, " script: " );
}
#endif /* JSD_DUMP */
/***************************************************************************/
void
jsd_DestroyAllJSDScripts( JSDContext* jsdc )
{
JSDScript *jsdscript;
JSDScript *next;
JS_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
for( jsdscript = (JSDScript*)jsdc->scripts.next;
jsdscript != (JSDScript*)&jsdc->scripts;
jsdscript = next )
{
next = (JSDScript*)jsdscript->links.next;
_destroyJSDScript( jsdc, jsdscript );
}
}
JSDScript*
jsd_FindJSDScript( JSDContext* jsdc,
JSScript *script )
{
JSDScript *jsdscript;
JS_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
for( jsdscript = (JSDScript *)jsdc->scripts.next;
jsdscript != (JSDScript *)&jsdc->scripts;
jsdscript = (JSDScript *)jsdscript->links.next )
{
if (jsdscript->script == script)
return jsdscript;
}
return NULL;
}
JSDScript*
jsd_IterateScripts(JSDContext* jsdc, JSDScript **iterp)
{
JSDScript *jsdscript = *iterp;
JS_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
if( !jsdscript )
jsdscript = (JSDScript *)jsdc->scripts.next;
if( jsdscript == (JSDScript *)&jsdc->scripts )
return NULL;
*iterp = (JSDScript*) jsdscript->links.next;
return jsdscript;
}
JSBool
jsd_IsActiveScript(JSDContext* jsdc, JSDScript *jsdscript)
{
JSDScript *current;
JS_ASSERT(JSD_SCRIPTS_LOCKED(jsdc));
for( current = (JSDScript *)jsdc->scripts.next;
current != (JSDScript *)&jsdc->scripts;
current = (JSDScript *)current->links.next )
{
if(jsdscript == current)
return JS_TRUE;
}
return JS_FALSE;
}
const char*
jsd_GetScriptFilename(JSDContext* jsdc, JSDScript *jsdscript)
{
return jsdscript->url;
}
const char*
jsd_GetScriptFunctionName(JSDContext* jsdc, JSDScript *jsdscript)
{
if( ! jsdscript->function )
return NULL;
return JS_GetFunctionName(jsdscript->function);
}
uintN
jsd_GetScriptBaseLineNumber(JSDContext* jsdc, JSDScript *jsdscript)
{
return jsdscript->lineBase;
}
uintN
jsd_GetScriptLineExtent(JSDContext* jsdc, JSDScript *jsdscript)
{
if( NOT_SET_YET == jsdscript->lineExtent )
jsdscript->lineExtent = JS_GetScriptLineExtent(jsdc->dumbContext, jsdscript->script);
return jsdscript->lineExtent;
}
jsuword
jsd_GetClosestPC(JSDContext* jsdc, JSDScript* jsdscript, uintN line)
{
#ifdef LIVEWIRE
if( jsdscript && jsdscript->lwscript )
{
uintN newline;
jsdlw_RawToProcessedLineNumber(jsdc, jsdscript, line, &newline);
if( line != newline )
line = newline;
}
#endif
return (jsuword) JS_LineNumberToPC(jsdc->dumbContext,
jsdscript->script, line );
}
uintN
jsd_GetClosestLine(JSDContext* jsdc, JSDScript* jsdscript, jsuword pc)
{
uintN first = jsdscript->lineBase;
uintN last = first + jsd_GetScriptLineExtent(jsdc, jsdscript) - 1;
uintN line = JS_PCToLineNumber(jsdc->dumbContext,
jsdscript->script, (jsbytecode*)pc);
if( line < first )
return first;
if( line > last )
return last;
#ifdef LIVEWIRE
if( jsdscript && jsdscript->lwscript )
{
uintN newline;
jsdlw_ProcessedToRawLineNumber(jsdc, jsdscript, line, &newline);
line = newline;
}
#endif
return line;
}
JSBool
jsd_SetScriptHook(JSDContext* jsdc, JSD_ScriptHookProc hook, void* callerdata)
{
JSD_LOCK();
jsdc->scriptHook = hook;
jsdc->scriptHookData = callerdata;
JSD_UNLOCK();
return JS_TRUE;
}
JSBool
jsd_GetScriptHook(JSDContext* jsdc, JSD_ScriptHookProc* hook, void** callerdata)
{
JSD_LOCK();
if( hook )
*hook = jsdc->scriptHook;
if( callerdata )
*callerdata = jsdc->scriptHookData;
JSD_UNLOCK();
return JS_TRUE;
}
/***************************************************************************/
void JS_DLL_CALLBACK
jsd_NewScriptHookProc(
JSContext *cx,
const char *filename, /* URL this script loads from */
uintN lineno, /* line where this script starts */
JSScript *script,
JSFunction *fun,
void* callerdata )
{
JSDScript* jsdscript = NULL;
JSDContext* jsdc = (JSDContext*) callerdata;
JSD_ScriptHookProc hook;
void* hookData;
JSD_ASSERT_VALID_CONTEXT(jsdc);
if( JSD_IS_DANGEROUS_THREAD(jsdc) )
return;
#ifdef LIVEWIRE
if( 1 == lineno )
jsdlw_PreLoadSource(jsdc, LWDBG_GetCurrentApp(), filename, JS_TRUE );
#endif
JSD_LOCK_SCRIPTS(jsdc);
jsdscript = _newJSDScript(jsdc, cx, script, fun);
JSD_UNLOCK_SCRIPTS(jsdc);
if( ! jsdscript )
return;
#ifdef JSD_DUMP
JSD_LOCK_SCRIPTS(jsdc);
_dumpJSDScript(jsdc, jsdscript, "***NEW Script: ");
_dumpJSDScriptList( jsdc );
JSD_UNLOCK_SCRIPTS(jsdc);
#endif /* JSD_DUMP */
/* local in case jsdc->scriptHook gets cleared on another thread */
JSD_LOCK();
hook = jsdc->scriptHook;
hookData = jsdc->scriptHookData;
JSD_UNLOCK();
if( hook )
hook(jsdc, jsdscript, JS_TRUE, hookData);
}
void JS_DLL_CALLBACK
jsd_DestroyScriptHookProc(
JSContext *cx,
JSScript *script,
void* callerdata )
{
JSDScript* jsdscript = NULL;
JSDContext* jsdc = (JSDContext*) callerdata;
JSD_ScriptHookProc hook;
void* hookData;
JSD_ASSERT_VALID_CONTEXT(jsdc);
if( JSD_IS_DANGEROUS_THREAD(jsdc) )
return;
JSD_LOCK_SCRIPTS(jsdc);
jsdscript = jsd_FindJSDScript(jsdc, script);
JSD_UNLOCK_SCRIPTS(jsdc);
if( ! jsdscript )
return;
#ifdef JSD_DUMP
JSD_LOCK_SCRIPTS(jsdc);
_dumpJSDScript(jsdc, jsdscript, "***DESTROY Script: ");
JSD_UNLOCK_SCRIPTS(jsdc);
#endif /* JSD_DUMP */
/* local in case hook gets cleared on another thread */
JSD_LOCK();
hook = jsdc->scriptHook;
hookData = jsdc->scriptHookData;
JSD_UNLOCK();
if( hook )
hook(jsdc, jsdscript, JS_FALSE, hookData);
JSD_LOCK_SCRIPTS(jsdc);
_destroyJSDScript(jsdc, jsdscript);
JSD_UNLOCK_SCRIPTS(jsdc);
#ifdef JSD_DUMP
JSD_LOCK_SCRIPTS(jsdc);
_dumpJSDScriptList(jsdc);
JSD_UNLOCK_SCRIPTS(jsdc);
#endif /* JSD_DUMP */
}
/***************************************************************************/
static JSDExecHook*
_findHook(JSDContext* jsdc, JSDScript* jsdscript, jsuword pc)
{
JSDExecHook* jsdhook;
JSCList* list = &jsdscript->hooks;
for( jsdhook = (JSDExecHook*)list->next;
jsdhook != (JSDExecHook*)list;
jsdhook = (JSDExecHook*)jsdhook->links.next )
{
if (jsdhook->pc == pc)
return jsdhook;
}
return NULL;
}
static JSBool
_isActiveHook(JSDContext* jsdc, JSScript *script, JSDExecHook* jsdhook)
{
JSDExecHook* current;
JSCList* list;
JSDScript* jsdscript;
JSD_LOCK_SCRIPTS(jsdc);
jsdscript = jsd_FindJSDScript(jsdc, script);
if( ! jsdscript)
{
JSD_UNLOCK_SCRIPTS(jsdc);
return JS_FALSE;
}
list = &jsdscript->hooks;
for( current = (JSDExecHook*)list->next;
current != (JSDExecHook*)list;
current = (JSDExecHook*)current->links.next )
{
if(current == jsdhook)
{
JSD_UNLOCK_SCRIPTS(jsdc);
return JS_TRUE;
}
}
JSD_UNLOCK_SCRIPTS(jsdc);
return JS_FALSE;
}
JSTrapStatus JS_DLL_CALLBACK
jsd_TrapHandler(JSContext *cx, JSScript *script, jsbytecode *pc, jsval *rval,
void *closure)
{
JSDExecHook* jsdhook = (JSDExecHook*) closure;
JSD_ExecutionHookProc hook;
void* hookData;
JSDContext* jsdc;
JSDScript* jsdscript;
JSD_LOCK();
if( NULL == (jsdc = jsd_JSDContextForJSContext(cx)) ||
! _isActiveHook(jsdc, script, jsdhook) )
{
JSD_UNLOCK();
return JSTRAP_CONTINUE;
}
JSD_ASSERT_VALID_EXEC_HOOK(jsdhook);
JS_ASSERT(jsdhook->pc == (jsuword)pc);
JS_ASSERT(jsdhook->jsdscript->script == script);
JS_ASSERT(jsdhook->jsdscript->jsdc == jsdc);
hook = jsdhook->hook;
hookData = jsdhook->callerdata;
jsdscript = jsdhook->jsdscript;
/* do not use jsdhook-> after this point */
JSD_UNLOCK();
if( ! jsdc || ! jsdc->inited )
return JSTRAP_CONTINUE;
if( JSD_IS_DANGEROUS_THREAD(jsdc) )
return JSTRAP_CONTINUE;
#ifdef LIVEWIRE
if( ! jsdlw_UserCodeAtPC(jsdc, jsdscript, (jsuword)pc) )
return JSTRAP_CONTINUE;
#endif
return jsd_CallExecutionHook(jsdc, cx, JSD_HOOK_BREAKPOINT,
hook, hookData, rval);
}
JSBool
jsd_SetExecutionHook(JSDContext* jsdc,
JSDScript* jsdscript,
jsuword pc,
JSD_ExecutionHookProc hook,
void* callerdata)
{
JSDExecHook* jsdhook;
JSD_LOCK();
if( ! hook )
{
jsd_ClearExecutionHook(jsdc, jsdscript, pc);
JSD_UNLOCK();
return JS_TRUE;
}
jsdhook = _findHook(jsdc, jsdscript, pc);
if( jsdhook )
{
jsdhook->hook = hook;
jsdhook->callerdata = callerdata;
return JS_TRUE;
}
/* else... */
jsdhook = (JSDExecHook*)calloc(1, sizeof(JSDExecHook));
if( ! jsdhook )
return JS_FALSE;
jsdhook->jsdscript = jsdscript;
jsdhook->pc = pc;
jsdhook->hook = hook;
jsdhook->callerdata = callerdata;
if( ! JS_SetTrap(jsdc->dumbContext, jsdscript->script,
(jsbytecode*)pc, jsd_TrapHandler, (void*) jsdhook) )
{
free(jsdhook);
return JS_FALSE;
}
JS_APPEND_LINK(&jsdhook->links, &jsdscript->hooks);
JSD_UNLOCK();
return JS_TRUE;
}
JSBool
jsd_ClearExecutionHook(JSDContext* jsdc,
JSDScript* jsdscript,
jsuword pc)
{
JSDExecHook* jsdhook;
JSD_LOCK();
jsdhook = _findHook(jsdc, jsdscript, pc);
if( ! jsdhook )
{
JS_ASSERT(0);
JSD_UNLOCK();
return JS_FALSE;
}
JS_ClearTrap(jsdc->dumbContext, jsdscript->script,
(jsbytecode*)pc, NULL, NULL );
JS_REMOVE_LINK(&jsdhook->links);
free(jsdhook);
JSD_UNLOCK();
return JS_TRUE;
}
JSBool
jsd_ClearAllExecutionHooksForScript(JSDContext* jsdc, JSDScript* jsdscript)
{
JSDExecHook* jsdhook;
JSCList* list = &jsdscript->hooks;
JSD_LOCK();
while( (JSDExecHook*)list != (jsdhook = (JSDExecHook*)list->next) )
{
JS_REMOVE_LINK(&jsdhook->links);
free(jsdhook);
}
JS_ClearScriptTraps(jsdc->dumbContext, jsdscript->script);
JSD_UNLOCK();
return JS_TRUE;
}
JSBool
jsd_ClearAllExecutionHooks(JSDContext* jsdc)
{
JSDScript* jsdscript;
JSDScript* iterp = NULL;
JSD_LOCK();
while( NULL != (jsdscript = jsd_IterateScripts(jsdc, &iterp)) )
jsd_ClearAllExecutionHooksForScript(jsdc, jsdscript);
JSD_UNLOCK();
return JS_TRUE;
}
void
jsd_ScriptCreated(JSDContext* jsdc,
JSContext *cx,
const char *filename, /* URL this script loads from */
uintN lineno, /* line where this script starts */
JSScript *script,
JSFunction *fun)
{
jsd_NewScriptHookProc(cx, filename, lineno, script, fun, jsdc);
}
void
jsd_ScriptDestroyed(JSDContext* jsdc,
JSContext *cx,
JSScript *script)
{
jsd_DestroyScriptHookProc(cx, script, jsdc);
}