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Bug 738153 - Remove JSScript::inlineData. r=luke.

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--HG--
extra : rebase_source : f003203fbe0219735655d334192fca14cc434736
This commit is contained in:
Nicholas Nethercote 2012-03-21 23:05:23 -07:00
parent 52ec83db25
commit 78439dc8b2
2 changed files with 10 additions and 54 deletions
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54
js/src/jsscript.cpp
View File

@ -1001,29 +1001,14 @@ JSScript::NewScript(JSContext *cx, uint32_t length, uint32_t nsrcnotes, uint32_t
size += length * sizeof(jsbytecode) + nsrcnotes * sizeof(jssrcnote);
uint8_t *data = NULL;
#if JS_SCRIPT_INLINE_DATA_LIMIT
if (size <= JS_SCRIPT_INLINE_DATA_LIMIT) {
/*
* Check that if inlineData is big enough to store const values, we
* can do that without any special alignment requirements given that
* the script as a GC thing is always aligned on Cell::CellSize.
*/
JS_STATIC_ASSERT(Cell::CellSize % sizeof(Value) == 0);
JS_STATIC_ASSERT(JS_SCRIPT_INLINE_DATA_LIMIT < sizeof(Value) ||
offsetof(JSScript, inlineData) % sizeof(Value) == 0);
} else
#endif
{
/*
* We assume that calloc aligns on sizeof(Value) if the size we ask to
* allocate divides sizeof(Value).
*/
JS_STATIC_ASSERT(sizeof(Value) == sizeof(double));
data = static_cast<uint8_t *>(cx->calloc_(JS_ROUNDUP(size, sizeof(Value))));
if (!data)
return NULL;
}
/*
* We assume that calloc aligns on sizeof(Value) if the size we ask to
* allocate divides sizeof(Value).
*/
JS_STATIC_ASSERT(sizeof(Value) == sizeof(double));
uint8_t *data = static_cast<uint8_t *>(cx->calloc_(JS_ROUNDUP(size, sizeof(Value))));
if (!data)
return NULL;
JSScript *script = js_NewGCScript(cx);
if (!script) {
@ -1034,10 +1019,6 @@ JSScript::NewScript(JSContext *cx, uint32_t length, uint32_t nsrcnotes, uint32_t
PodZero(script);
#ifdef JS_CRASH_DIAGNOSTICS
script->cookie1[0] = script->cookie2[0] = JS_SCRIPT_COOKIE;
#endif
#if JS_SCRIPT_INLINE_DATA_LIMIT
if (!data)
data = script->inlineData;
#endif
script->data = data;
script->length = length;
@ -1325,11 +1306,6 @@ JSScript::NewScriptFromEmitter(JSContext *cx, BytecodeEmitter *bce)
size_t
JSScript::computedSizeOfData()
{
#if JS_SCRIPT_INLINE_DATA_LIMIT
if (data == inlineData)
return 0;
#endif
uint8_t *dataEnd = code + length * sizeof(jsbytecode) + numNotes() * sizeof(jssrcnote);
JS_ASSERT(dataEnd >= data);
return dataEnd - data;
@ -1338,11 +1314,6 @@ JSScript::computedSizeOfData()
size_t
JSScript::sizeOfData(JSMallocSizeOfFun mallocSizeOf)
{
#if JS_SCRIPT_INLINE_DATA_LIMIT
if (data == inlineData)
return 0;
#endif
return mallocSizeOf(data);
}
@ -1436,13 +1407,8 @@ JSScript::finalize(JSContext *cx, bool background)
cx->free_(debug);
}
#if JS_SCRIPT_INLINE_DATA_LIMIT
if (data != inlineData)
#endif
{
JS_POISON(data, 0xdb, computedSizeOfData());
cx->free_(data);
}
JS_POISON(data, 0xdb, computedSizeOfData());
cx->free_(data);
}
namespace js {

10
js/src/jsscript.h
View File

@ -452,16 +452,6 @@ struct JSScript : public js::gc::Cell
uint16_t nClosedArgs; /* number of args which are closed over. */
uint16_t nClosedVars; /* number of vars which are closed over. */
/*
* To ensure sizeof(JSScript) % gc::Cell::CellSize == 0 on we must pad
* the script with 4 bytes. We use them to store tiny scripts like empty
* scripts.
*/
#if JS_BITS_PER_WORD == 64
#define JS_SCRIPT_INLINE_DATA_LIMIT 4
uint8_t inlineData[JS_SCRIPT_INLINE_DATA_LIMIT];
#endif
const char *filename; /* source filename or null */
JSAtom **atoms; /* maps immediate index to literal struct */
private: