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- /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Mozilla Communicator client code, released
- * March 31, 1998.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #ifndef jsscript_h___
- #define jsscript_h___
- /*
- * JS script descriptor.
- */
- #include "jsatom.h"
- #include "jsprvtd.h"
-
- JS_BEGIN_EXTERN_C
-
- /*
- * Exception handling runtime information.
- *
- * All fields except length are code offsets relative to the main entry point
- * of the script. If script->trynotes is not null, it points to a vector of
- * these structs terminated by one with catchStart == 0.
- */
- struct JSTryNote {
- ptrdiff_t start; /* start of try statement */
- ptrdiff_t length; /* count of try statement bytecodes */
- ptrdiff_t catchStart; /* start of catch block (0 if end) */
- };
-
- #define JSTRYNOTE_GRAIN sizeof(ptrdiff_t)
- #define JSTRYNOTE_ALIGNMASK (JSTRYNOTE_GRAIN - 1)
-
- struct JSScript {
- jsbytecode *code; /* bytecodes and their immediate operands */
- uint32 length; /* length of code vector */
- jsbytecode *main; /* main entry point, after predef'ing prolog */
- uint16 version; /* JS version under which script was compiled */
- uint16 numGlobalVars; /* declared global var/const/function count */
- JSAtomMap atomMap; /* maps immediate index to literal struct */
- const char *filename; /* source filename or null */
- uintN lineno; /* base line number of script */
- uintN depth; /* maximum stack depth in slots */
- JSTryNote *trynotes; /* exception table for this script */
- JSPrincipals *principals; /* principals for this script */
- JSObject *object; /* optional Script-class object wrapper */
- };
-
- /* No need to store script->notes now that it is allocated right after code. */
- #define SCRIPT_NOTES(script) ((jssrcnote*)((script)->code+(script)->length))
-
- #define SCRIPT_FIND_CATCH_START(script, pc, catchpc) \
- JS_BEGIN_MACRO \
- JSTryNote *tn_ = (script)->trynotes; \
- jsbytecode *catchpc_ = NULL; \
- if (tn_) { \
- ptrdiff_t off_ = PTRDIFF(pc, (script)->main, jsbytecode); \
- if (off_ >= 0) { \
- while ((jsuword)(off_ - tn_->start) >= (jsuword)tn_->length) \
- ++tn_; \
- if (tn_->catchStart) \
- catchpc_ = (script)->main + tn_->catchStart; \
- } \
- } \
- catchpc = catchpc_; \
- JS_END_MACRO
-
- extern JS_FRIEND_DATA(JSClass) js_ScriptClass;
-
- extern JSObject *
- js_InitScriptClass(JSContext *cx, JSObject *obj);
-
- /*
- * On first new context in rt, initialize script runtime state, specifically
- * the script filename table and its lock.
- */
- extern JSBool
- js_InitRuntimeScriptState(JSRuntime *rt);
-
- /*
- * On last context destroy for rt, if script filenames are all GC'd, free the
- * script filename table and its lock.
- */
- extern void
- js_FinishRuntimeScriptState(JSRuntime *rt);
-
- /*
- * On JS_DestroyRuntime(rt), forcibly free script filename prefixes and any
- * script filename table entries that have not been GC'd, the latter using
- * js_FinishRuntimeScriptState.
- *
- * This allows script filename prefixes to outlive any context in rt.
- */
- extern void
- js_FreeRuntimeScriptState(JSRuntime *rt);
-
- extern const char *
- js_SaveScriptFilename(JSContext *cx, const char *filename);
-
- extern const char *
- js_SaveScriptFilenameRT(JSRuntime *rt, const char *filename, uint32 flags);
-
- extern uint32
- js_GetScriptFilenameFlags(const char *filename);
-
- extern void
- js_MarkScriptFilename(const char *filename);
-
- extern void
- js_MarkScriptFilenames(JSRuntime *rt, uintN gcflags);
-
- extern void
- js_SweepScriptFilenames(JSRuntime *rt);
-
- /*
- * Two successively less primitive ways to make a new JSScript. The first
- * does *not* call a non-null cx->runtime->newScriptHook -- only the second,
- * js_NewScriptFromCG, calls this optional debugger hook.
- *
- * The js_NewScript function can't know whether the script it creates belongs
- * to a function, or is top-level or eval code, but the debugger wants access
- * to the newly made script's function, if any -- so callers of js_NewScript
- * are responsible for notifying the debugger after successfully creating any
- * kind (function or other) of new JSScript.
- */
- extern JSScript *
- js_NewScript(JSContext *cx, uint32 length, uint32 snlength, uint32 tnlength);
-
- extern JS_FRIEND_API(JSScript *)
- js_NewScriptFromCG(JSContext *cx, JSCodeGenerator *cg, JSFunction *fun);
-
- /*
- * New-script-hook calling is factored from js_NewScriptFromCG so that it
- * and callers of js_XDRScript can share this code. In the case of callers
- * of js_XDRScript, the hook should be invoked only after successful decode
- * of any owning function (the fun parameter) or script object (null fun).
- */
- extern JS_FRIEND_API(void)
- js_CallNewScriptHook(JSContext *cx, JSScript *script, JSFunction *fun);
-
- extern JS_FRIEND_API(void)
- js_CallDestroyScriptHook(JSContext *cx, JSScript *script);
-
- extern void
- js_DestroyScript(JSContext *cx, JSScript *script);
-
- extern void
- js_MarkScript(JSContext *cx, JSScript *script, void *arg);
-
- extern jssrcnote *
- js_GetSrcNote(JSScript *script, jsbytecode *pc);
-
- /* XXX need cx to lock function objects declared by prolog bytecodes. */
- extern uintN
- js_PCToLineNumber(JSContext *cx, JSScript *script, jsbytecode *pc);
-
- extern jsbytecode *
- js_LineNumberToPC(JSScript *script, uintN lineno);
-
- extern JS_FRIEND_API(uintN)
- js_GetScriptLineExtent(JSScript *script);
-
- /*
- * If magic is non-null, js_XDRScript succeeds on magic number mismatch but
- * returns false in *magic; it reflects a match via a true *magic out param.
- * If magic is null, js_XDRScript returns false on bad magic number errors,
- * which it reports.
- *
- * NB: callers must call js_CallNewScriptHook after successful JSXDR_DECODE
- * and subsequent set-up of owning function or script object, if any.
- */
- extern JSBool
- js_XDRScript(JSXDRState *xdr, JSScript **scriptp, JSBool *magic);
-
- JS_END_EXTERN_C
-
- #endif /* jsscript_h___ */
-