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Bug 514585: Use bitfields in JSScript instead of a flag word. r=brendan

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This is behavior-neutral cleanup in preparation for the real patch.
This commit is contained in:
Jim Blandy 2009-10-08 10:29:03 -07:00
parent b101872320
commit 0d6cdd1921
7 changed files with 15 additions and 14 deletions
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4
js/src/jsfun.cpp
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@ -471,7 +471,9 @@ WrapEscapingClosure(JSContext *cx, JSStackFrame *fp, JSObject *funobj, JSFunctio
* Fill in the rest of wscript. This means if you add members to JSScript
* you must update this code. FIXME: factor into JSScript::clone method.
*/
wscript->flags = script->flags;
wscript->noScriptRval = script->noScriptRval;
wscript->savedCallerFun = script->savedCallerFun;
wscript->hasSharps = script->hasSharps;
wscript->version = script->version;
wscript->nfixed = script->nfixed;
wscript->filename = script->filename;

4
js/src/jsinterp.cpp
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@ -1523,11 +1523,11 @@ js_Execute(JSContext *cx, JSObject *chain, JSScript *script,
#if JS_HAS_SHARP_VARS
JS_STATIC_ASSERT(SHARP_NSLOTS == 2);
if (script->flags & JSSF_HAS_SHARPS) {
if (script->hasSharps) {
JS_ASSERT(script->nfixed >= SHARP_NSLOTS);
jsval *sharps = &frame.slots[script->nfixed - SHARP_NSLOTS];
if (down && down->script && (down->script->flags & JSSF_HAS_SHARPS)) {
if (down && down->script && down->script->hasSharps) {
JS_ASSERT(down->script->nfixed >= SHARP_NSLOTS);
int base = (down->fun && !(down->flags & JSFRAME_SPECIAL))
? down->fun->sharpSlotBase(cx)

2
js/src/jsobj.cpp
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@ -1419,7 +1419,7 @@ obj_eval(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
EVAL_CACHE_METER(probe);
while ((script = *scriptp) != NULL) {
if ((script->flags & JSSF_SAVED_CALLER_FUN) &&
if (script->savedCallerFun &&
script->version == cx->version &&
(script->principals == principals ||
(principals->subsume(principals, script->principals) &&

2
js/src/jsopcode.cpp
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@ -2816,7 +2816,7 @@ Decompile(SprintStack *ss, jsbytecode *pc, intN nb, JSOp nextop)
case JSOP_CALLDSLOT:
{
if (!jp->fun) {
JS_ASSERT(jp->script->flags & JSSF_SAVED_CALLER_FUN);
JS_ASSERT(jp->script->savedCallerFun);
jp->fun = jp->script->getFunction(0);
}

2
js/src/jsparse.cpp
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@ -1001,7 +1001,7 @@ JSCompiler::compileScript(JSContext *cx, JSObject *scopeChain, JSStackFrame *cal
#endif
script = js_NewScriptFromCG(cx, &cg);
if (script && funbox)
script->flags |= JSSF_SAVED_CALLER_FUN;
script->savedCallerFun = true;
#ifdef JS_SCOPE_DEPTH_METER
if (script) {

4
js/src/jsscript.cpp
View File

@ -1531,9 +1531,9 @@ js_NewScriptFromCG(JSContext *cx, JSCodeGenerator *cg)
if (cg->regexpList.length != 0)
cg->regexpList.finish(script->regexps());
if (cg->flags & TCF_NO_SCRIPT_RVAL)
script->flags |= JSSF_NO_SCRIPT_RVAL;
script->noScriptRval = true;
if (cg->hasSharps())
script->flags |= JSSF_HAS_SHARPS;
script->hasSharps = true;
if (cg->upvarList.count != 0) {
JS_ASSERT(cg->upvarList.count <= cg->upvarMap.length);

11
js/src/jsscript.h
View File

@ -115,7 +115,11 @@ struct JSScript {
regexps or 0 if none. */
uint8 trynotesOffset; /* offset to the array of try notes or
0 if none */
uint8 flags; /* see below */
bool noScriptRval:1; /* no need for result value of last
expression statement */
bool savedCallerFun:1; /* object 0 is caller function */
bool hasSharps:1; /* script uses sharp variables */
jsbytecode *main; /* main entry point, after predef'ing prolog */
JSAtomMap atomMap; /* maps immediate index to literal struct */
const char *filename; /* source filename or null */
@ -170,11 +174,6 @@ struct JSScript {
inline JSObject *getRegExp(size_t index);
};
#define JSSF_NO_SCRIPT_RVAL 0x01 /* no need for result value of last
expression statement */
#define JSSF_SAVED_CALLER_FUN 0x02 /* object 0 is caller function */
#define JSSF_HAS_SHARPS 0x04 /* script uses sharp variables */
#define SHARP_NSLOTS 2 /* [#array, #depth] slots if the script
uses sharp variables */