1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726
|
/* -*- 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 jscntxt_h___
#define jscntxt_h___
/*
* JS execution context.
*/
#include "jsarena.h" /* Added by JSIFY */
#include "jsclist.h"
#include "jslong.h"
#include "jsatom.h"
#include "jsconfig.h"
#include "jsdhash.h"
#include "jsgc.h"
#include "jsinterp.h"
#include "jsobj.h"
#include "jsprvtd.h"
#include "jspubtd.h"
#include "jsregexp.h"
JS_BEGIN_EXTERN_C
typedef enum JSGCMode { JS_NO_GC, JS_MAYBE_GC, JS_FORCE_GC } JSGCMode;
typedef enum JSRuntimeState {
JSRTS_DOWN,
JSRTS_LAUNCHING,
JSRTS_UP,
JSRTS_LANDING
} JSRuntimeState;
typedef struct JSPropertyTreeEntry {
JSDHashEntryHdr hdr;
JSScopeProperty *child;
} JSPropertyTreeEntry;
struct JSRuntime {
/* Runtime state, synchronized by the stateChange/gcLock condvar/lock. */
JSRuntimeState state;
/* Garbage collector state, used by jsgc.c. */
JSArenaPool gcArenaPool[GC_NUM_FREELISTS];
JSGCThing *gcFreeList[GC_NUM_FREELISTS];
JSDHashTable gcRootsHash;
JSDHashTable *gcLocksHash;
jsrefcount gcKeepAtoms;
uint32 gcBytes;
uint32 gcLastBytes;
uint32 gcMaxBytes;
uint32 gcLevel;
uint32 gcNumber;
JSPackedBool gcPoke;
JSPackedBool gcRunning;
JSGCCallback gcCallback;
uint32 gcMallocBytes;
/*
* API compatibility requires keeping GCX_PRIVATE bytes separate from the
* original GC types' byte tally. Otherwise embeddings that configure a
* good limit for pre-GCX_PRIVATE versions of the engine will see memory
* over-pressure too often, possibly leading to failed last-ditch GCs.
*
* The new XML GC-thing types do add to gcBytes, and they're larger than
* the original GC-thing type size (8 bytes on most architectures). So a
* user who enables E4X may want to increase the maxbytes value passed to
* JS_NewRuntime. TODO: Note this in the API docs.
*/
uint32 gcPrivateBytes;
#if JS_HAS_XML_SUPPORT
/* Lists of JSXML private data structures to be finalized. */
JSXMLNamespace *gcDoomedNamespaces;
JSXMLQName *gcDoomedQNames;
JSXML *gcDoomedXML;
#endif
#ifdef JS_GCMETER
JSGCStats gcStats;
#endif
/* Literal table maintained by jsatom.c functions. */
JSAtomState atomState;
/* Random number generator state, used by jsmath.c. */
JSBool rngInitialized;
int64 rngMultiplier;
int64 rngAddend;
int64 rngMask;
int64 rngSeed;
jsdouble rngDscale;
/* Well-known numbers held for use by this runtime's contexts. */
jsdouble *jsNaN;
jsdouble *jsNegativeInfinity;
jsdouble *jsPositiveInfinity;
/* Empty string held for use by this runtime's contexts. */
JSString *emptyString;
/* List of active contexts sharing this runtime; protected by gcLock. */
JSCList contextList;
/* These are used for debugging -- see jsprvtd.h and jsdbgapi.h. */
JSTrapHandler interruptHandler;
void *interruptHandlerData;
JSNewScriptHook newScriptHook;
void *newScriptHookData;
JSDestroyScriptHook destroyScriptHook;
void *destroyScriptHookData;
JSTrapHandler debuggerHandler;
void *debuggerHandlerData;
JSSourceHandler sourceHandler;
void *sourceHandlerData;
JSInterpreterHook executeHook;
void *executeHookData;
JSInterpreterHook callHook;
void *callHookData;
JSObjectHook objectHook;
void *objectHookData;
JSTrapHandler throwHook;
void *throwHookData;
JSDebugErrorHook debugErrorHook;
void *debugErrorHookData;
/* More debugging state, see jsdbgapi.c. */
JSCList trapList;
JSCList watchPointList;
/* Weak links to properties, indexed by quickened get/set opcodes. */
/* XXX must come after JSCLists or MSVC alignment bug bites empty lists */
JSPropertyCache propertyCache;
/* Client opaque pointer */
void *data;
#ifdef JS_THREADSAFE
/* These combine to interlock the GC and new requests. */
PRLock *gcLock;
PRCondVar *gcDone;
PRCondVar *requestDone;
uint32 requestCount;
jsword gcThread;
/* Lock and owning thread pointer for JS_LOCK_RUNTIME. */
PRLock *rtLock;
#ifdef DEBUG
jsword rtLockOwner;
#endif
/* Used to synchronize down/up state change; protected by gcLock. */
PRCondVar *stateChange;
/* Used to serialize cycle checks when setting __proto__ or __parent__. */
PRLock *setSlotLock;
PRCondVar *setSlotDone;
JSBool setSlotBusy;
JSScope *setSlotScope; /* deadlock avoidance, see jslock.c */
/*
* State for sharing single-threaded scopes, once a second thread tries to
* lock a scope. The scopeSharingDone condvar is protected by rt->gcLock,
* to minimize number of locks taken in JS_EndRequest.
*
* The scopeSharingTodo linked list is likewise "global" per runtime, not
* one-list-per-context, to conserve space over all contexts, optimizing
* for the likely case that scopes become shared rarely, and among a very
* small set of threads (contexts).
*/
PRCondVar *scopeSharingDone;
JSScope *scopeSharingTodo;
/*
* Magic terminator for the rt->scopeSharingTodo linked list, threaded through
* scope->u.link. This hack allows us to test whether a scope is on the list
* by asking whether scope->u.link is non-null. We use a large, likely bogus
* pointer here to distinguish this value from any valid u.count (small int)
* value.
*/
#define NO_SCOPE_SHARING_TODO ((JSScope *) 0xfeedbeef)
#endif /* JS_THREADSAFE */
/*
* Check property accessibility for objects of arbitrary class. Used at
* present to check f.caller accessibility for any function object f.
*/
JSCheckAccessOp checkObjectAccess;
/* Security principals serialization support. */
JSPrincipalsTranscoder principalsTranscoder;
/* Optional hook to find principals for an object in this runtime. */
JSObjectPrincipalsFinder findObjectPrincipals;
/* Shared scope property tree, and allocator for its nodes. */
JSDHashTable propertyTreeHash;
JSScopeProperty *propertyFreeList;
JSArenaPool propertyArenaPool;
/* Script filename table. */
struct JSHashTable *scriptFilenameTable;
JSCList scriptFilenamePrefixes;
#ifdef JS_THREADSAFE
PRLock *scriptFilenameTableLock;
#endif
/* Number localization, used by jsnum.c */
const char *thousandsSeparator;
const char *decimalSeparator;
const char *numGrouping;
/*
* Weak references to lazily-created, well-known XML singletons.
*
* NB: Singleton objects must be carefully disconnected from the rest of
* the object graph usually associated with a JSContext's global object,
* including the set of standard class objects. See jsxml.c for details.
*/
JSObject *anynameObject;
JSObject *functionNamespaceObject;
#ifdef DEBUG
/* Function invocation metering. */
jsrefcount inlineCalls;
jsrefcount nativeCalls;
jsrefcount nonInlineCalls;
jsrefcount constructs;
/* Scope lock and property metering. */
jsrefcount claimAttempts;
jsrefcount claimedScopes;
jsrefcount deadContexts;
jsrefcount deadlocksAvoided;
jsrefcount liveScopes;
jsrefcount sharedScopes;
jsrefcount totalScopes;
jsrefcount badUndependStrings;
jsrefcount liveScopeProps;
jsrefcount totalScopeProps;
jsrefcount livePropTreeNodes;
jsrefcount duplicatePropTreeNodes;
jsrefcount totalPropTreeNodes;
jsrefcount propTreeKidsChunks;
jsrefcount middleDeleteFixups;
/* String instrumentation. */
jsrefcount liveStrings;
jsrefcount totalStrings;
jsrefcount liveDependentStrings;
jsrefcount totalDependentStrings;
double lengthSum;
double lengthSquaredSum;
double strdepLengthSum;
double strdepLengthSquaredSum;
#endif
};
#ifdef DEBUG
# define JS_RUNTIME_METER(rt, which) JS_ATOMIC_INCREMENT(&(rt)->which)
# define JS_RUNTIME_UNMETER(rt, which) JS_ATOMIC_DECREMENT(&(rt)->which)
#else
# define JS_RUNTIME_METER(rt, which) /* nothing */
# define JS_RUNTIME_UNMETER(rt, which) /* nothing */
#endif
#define JS_KEEP_ATOMS(rt) JS_ATOMIC_INCREMENT(&(rt)->gcKeepAtoms);
#define JS_UNKEEP_ATOMS(rt) JS_ATOMIC_DECREMENT(&(rt)->gcKeepAtoms);
#ifdef JS_ARGUMENT_FORMATTER_DEFINED
/*
* Linked list mapping format strings for JS_{Convert,Push}Arguments{,VA} to
* formatter functions. Elements are sorted in non-increasing format string
* length order.
*/
struct JSArgumentFormatMap {
const char *format;
size_t length;
JSArgumentFormatter formatter;
JSArgumentFormatMap *next;
};
#endif
struct JSStackHeader {
uintN nslots;
JSStackHeader *down;
};
#define JS_STACK_SEGMENT(sh) ((jsval *)(sh) + 2)
/*
* Key and entry types for the JSContext.resolvingTable hash table, typedef'd
* here because all consumers need to see these declarations (and not just the
* typedef names, as would be the case for an opaque pointer-to-typedef'd-type
* declaration), along with cx->resolvingTable.
*/
typedef struct JSResolvingKey {
JSObject *obj;
jsid id;
} JSResolvingKey;
typedef struct JSResolvingEntry {
JSDHashEntryHdr hdr;
JSResolvingKey key;
uint32 flags;
} JSResolvingEntry;
#define JSRESFLAG_LOOKUP 0x1 /* resolving id from lookup */
#define JSRESFLAG_WATCH 0x2 /* resolving id from watch */
typedef struct JSLocalRootChunk JSLocalRootChunk;
#define JSLRS_CHUNK_SHIFT 8
#define JSLRS_CHUNK_SIZE JS_BIT(JSLRS_CHUNK_SHIFT)
#define JSLRS_CHUNK_MASK JS_BITMASK(JSLRS_CHUNK_SHIFT)
struct JSLocalRootChunk {
jsval roots[JSLRS_CHUNK_SIZE];
JSLocalRootChunk *down;
};
typedef struct JSLocalRootStack {
uint32 scopeMark;
uint32 rootCount;
JSLocalRootChunk *topChunk;
JSLocalRootChunk firstChunk;
} JSLocalRootStack;
#define JSLRS_NULL_MARK ((uint32) -1)
typedef struct JSTempValueRooter JSTempValueRooter;
/*
* If count is -1, then u.value contains the single value to root. Otherwise
* u.array points to a stack-allocated vector of jsvals. Note that the vector
* may have length 0 or 1 for full generality, so we need -1 to discriminate
* the union.
*
* If you need to protect a result value that flows out of a C function across
* several layers of other functions, use the js_LeaveLocalRootScopeWithResult
* internal API (see further below) instead.
*/
struct JSTempValueRooter {
JSTempValueRooter *down;
jsint count;
union {
jsval value;
jsval *array;
} u;
};
#define JS_PUSH_TEMP_ROOT_COMMON(cx,tvr) \
JS_BEGIN_MACRO \
JS_ASSERT((cx)->tempValueRooters != (tvr)); \
(tvr)->down = (cx)->tempValueRooters; \
(cx)->tempValueRooters = (tvr); \
JS_END_MACRO
#define JS_PUSH_SINGLE_TEMP_ROOT(cx,val,tvr) \
JS_BEGIN_MACRO \
JS_PUSH_TEMP_ROOT_COMMON(cx, tvr); \
(tvr)->count = -1; \
(tvr)->u.value = (val); \
JS_END_MACRO
#define JS_PUSH_TEMP_ROOT(cx,cnt,arr,tvr) \
JS_BEGIN_MACRO \
JS_PUSH_TEMP_ROOT_COMMON(cx, tvr); \
(tvr)->count = (cnt); \
(tvr)->u.array = (arr); \
JS_END_MACRO
#define JS_POP_TEMP_ROOT(cx,tvr) \
JS_BEGIN_MACRO \
JS_ASSERT((cx)->tempValueRooters == (tvr)); \
(cx)->tempValueRooters = (tvr)->down; \
JS_END_MACRO
#define JS_TEMP_ROOT_EVAL(cx,cnt,val,expr) \
JS_BEGIN_MACRO \
JSTempValueRooter tvr; \
JS_PUSH_TEMP_ROOT(cx, cnt, val, &tvr); \
(expr); \
JS_POP_TEMP_ROOT(cx, &tvr); \
JS_END_MACRO
struct JSContext {
JSCList links;
/* Interpreter activation count. */
uintN interpLevel;
/* Limit pointer for checking stack consumption during recursion. */
jsuword stackLimit;
/* Runtime version control identifier and equality operators. */
uint16 version;
jsbytecode jsop_eq;
jsbytecode jsop_ne;
/* Data shared by threads in an address space. */
JSRuntime *runtime;
/* Stack arena pool and frame pointer register. */
JSArenaPool stackPool;
JSStackFrame *fp;
/* Temporary arena pool used while compiling and decompiling. */
JSArenaPool tempPool;
/* Top-level object and pointer to top stack frame's scope chain. */
JSObject *globalObject;
/* Most recently created things by type, members of the GC's root set. */
JSGCThing *newborn[GCX_NTYPES];
/* Atom root for the last-looked-up atom on this context. */
JSAtom *lastAtom;
/* Root for the result of the most recent js_InternalInvoke call. */
jsval lastInternalResult;
/* Regular expression class statics (XXX not shared globally). */
JSRegExpStatics regExpStatics;
/* State for object and array toSource conversion. */
JSSharpObjectMap sharpObjectMap;
/* Argument formatter support for JS_{Convert,Push}Arguments{,VA}. */
JSArgumentFormatMap *argumentFormatMap;
/* Last message string and trace file for debugging. */
char *lastMessage;
#ifdef DEBUG
void *tracefp;
#endif
/* Per-context optional user callbacks. */
JSBranchCallback branchCallback;
JSErrorReporter errorReporter;
/* Client opaque pointer */
void *data;
/* GC and thread-safe state. */
JSStackFrame *dormantFrameChain; /* dormant stack frame to scan */
#ifdef JS_THREADSAFE
jsword thread;
jsrefcount requestDepth;
JSScope *scopeToShare; /* weak reference, see jslock.c */
JSScope *lockedSealedScope; /* weak ref, for low-cost sealed
scope locking */
#endif
#if JS_HAS_LVALUE_RETURN
/*
* Secondary return value from native method called on the left-hand side
* of an assignment operator. The native should store the object in which
* to set a property in *rval, and return the property's id expressed as a
* jsval by calling JS_SetCallReturnValue2(cx, idval).
*/
jsval rval2;
JSPackedBool rval2set;
#endif
#if JS_HAS_XML_SUPPORT
/*
* Bit-set formed from binary exponentials of the XML_* tiny-ids defined
* for boolean settings in jsxml.c, plus an XSF_CACHE_VALID bit. Together
* these act as a cache of the boolean XML.ignore* and XML.prettyPrinting
* property values associated with this context's global object.
*/
uint8 xmlSettingFlags;
#endif
/*
* True if creating an exception object, to prevent runaway recursion.
* NB: creatingException packs with rval2set, #if JS_HAS_LVALUE_RETURN;
* with xmlSettingFlags, #if JS_HAS_XML_SUPPORT; and with throwing below.
*/
JSPackedBool creatingException;
/*
* Exception state -- the exception member is a GC root by definition.
* NB: throwing packs with creatingException and rval2set, above.
*/
JSPackedBool throwing; /* is there a pending exception? */
jsval exception; /* most-recently-thrown exception */
/* Per-context options. */
uint32 options; /* see jsapi.h for JSOPTION_* */
/* Locale specific callbacks for string conversion. */
JSLocaleCallbacks *localeCallbacks;
/*
* cx->resolvingTable is non-null and non-empty if we are initializing
* standard classes lazily, or if we are otherwise recursing indirectly
* from js_LookupProperty through a JSClass.resolve hook. It is used to
* limit runaway recursion (see jsapi.c and jsobj.c).
*/
JSDHashTable *resolvingTable;
/* PDL of stack headers describing stack slots not rooted by argv, etc. */
JSStackHeader *stackHeaders;
/* Optional stack of heap-allocated scoped local GC roots. */
JSLocalRootStack *localRootStack;
/* Stack of thread-stack-allocated temporary GC roots. */
JSTempValueRooter *tempValueRooters;
};
/*
* Slightly more readable macros for testing per-context option settings (also
* to hide bitset implementation detail).
*
* JSOPTION_XML must be handled specially in order to propagate from compile-
* to run-time (from cx->options to script->version/cx->version). To do that,
* we copy JSOPTION_XML from cx->options into cx->version as JSVERSION_HAS_XML
* whenever options are set, and preserve this XML flag across version number
* changes done via the JS_SetVersion API.
*
* But when executing a script or scripted function, the interpreter changes
* cx->version, including the XML flag, to script->version. Thus JSOPTION_XML
* is a compile-time option that causes a run-time version change during each
* activation of the compiled script. That version change has the effect of
* changing JS_HAS_XML_OPTION, so that any compiling done via eval enables XML
* support. If an XML-enabled script or function calls a non-XML function,
* the flag bit will be cleared during the callee's activation.
*
* Note that JS_SetVersion API calls never pass JSVERSION_HAS_XML or'd into
* that API's version parameter.
*
* Note also that script->version must contain this XML option flag in order
* for XDR'ed scripts to serialize and deserialize with that option preserved
* for detection at run-time. We can't copy other compile-time options into
* script->version because that would break backward compatibility (certain
* other options, e.g. JSOPTION_VAROBJFIX, are analogous to JSOPTION_XML).
*/
#define JS_HAS_OPTION(cx,option) (((cx)->options & (option)) != 0)
#define JS_HAS_STRICT_OPTION(cx) JS_HAS_OPTION(cx, JSOPTION_STRICT)
#define JS_HAS_WERROR_OPTION(cx) JS_HAS_OPTION(cx, JSOPTION_WERROR)
#define JS_HAS_COMPILE_N_GO_OPTION(cx) JS_HAS_OPTION(cx, JSOPTION_COMPILE_N_GO)
#define JS_HAS_ATLINE_OPTION(cx) JS_HAS_OPTION(cx, JSOPTION_ATLINE)
#define JSVERSION_MASK 0x0FFF /* see JSVersion in jspubtd.h */
#define JSVERSION_HAS_XML 0x1000 /* flag induced by XML option */
#define JSVERSION_NUMBER(cx) ((cx)->version & JSVERSION_MASK)
#define JS_HAS_XML_OPTION(cx) ((cx)->version & JSVERSION_HAS_XML || \
JSVERSION_NUMBER(cx) >= JSVERSION_1_6)
#define JS_HAS_NATIVE_BRANCH_CALLBACK_OPTION(cx) \
JS_HAS_OPTION(cx, JSOPTION_NATIVE_BRANCH_CALLBACK)
/*
* Wrappers for the JSVERSION_IS_* macros from jspubtd.h taking JSContext *cx
* and masking off the XML flag and any other high order bits.
*/
#define JS_VERSION_IS_ECMA(cx) JSVERSION_IS_ECMA(JSVERSION_NUMBER(cx))
#define JS_VERSION_IS_1_2(cx) (JSVERSION_NUMBER(cx) == JSVERSION_1_2)
/*
* Common subroutine of JS_SetVersion and js_SetVersion, to update per-context
* data that depends on version.
*/
extern void
js_OnVersionChange(JSContext *cx);
/*
* Unlike the JS_SetVersion API, this function stores JSVERSION_HAS_XML and
* any future non-version-number flags induced by compiler options.
*/
extern void
js_SetVersion(JSContext *cx, JSVersion version);
/*
* Create and destroy functions for JSContext, which is manually allocated
* and exclusively owned.
*/
extern JSContext *
js_NewContext(JSRuntime *rt, size_t stackChunkSize);
extern void
js_DestroyContext(JSContext *cx, JSGCMode gcmode);
/*
* Return true if cx points to a context in rt->contextList, else return false.
* NB: the caller (see jslock.c:ClaimScope) must hold rt->gcLock.
*/
extern JSBool
js_ValidContextPointer(JSRuntime *rt, JSContext *cx);
/*
* If unlocked, acquire and release rt->gcLock around *iterp update; otherwise
* the caller must be holding rt->gcLock.
*/
extern JSContext *
js_ContextIterator(JSRuntime *rt, JSBool unlocked, JSContext **iterp);
/*
* JSClass.resolve and watchpoint recursion damping machinery.
*/
extern JSBool
js_StartResolving(JSContext *cx, JSResolvingKey *key, uint32 flag,
JSResolvingEntry **entryp);
extern void
js_StopResolving(JSContext *cx, JSResolvingKey *key, uint32 flag,
JSResolvingEntry *entry, uint32 generation);
/*
* Local root set management.
*/
extern JSBool
js_EnterLocalRootScope(JSContext *cx);
extern void
js_LeaveLocalRootScope(JSContext *cx);
extern void
js_ForgetLocalRoot(JSContext *cx, jsval v);
extern int
js_PushLocalRoot(JSContext *cx, JSLocalRootStack *lrs, jsval v);
extern void
js_MarkLocalRoots(JSContext *cx, JSLocalRootStack *lrs);
/*
* Report an exception, which is currently realized as a printf-style format
* string and its arguments.
*/
typedef enum JSErrNum {
#define MSG_DEF(name, number, count, exception, format) \
name = number,
#include "js.msg"
#undef MSG_DEF
JSErr_Limit
} JSErrNum;
extern const JSErrorFormatString *
js_GetErrorMessage(void *userRef, const char *locale, const uintN errorNumber);
#ifdef va_start
extern JSBool
js_ReportErrorVA(JSContext *cx, uintN flags, const char *format, va_list ap);
extern JSBool
js_ReportErrorNumberVA(JSContext *cx, uintN flags, JSErrorCallback callback,
void *userRef, const uintN errorNumber,
JSBool charArgs, va_list ap);
extern JSBool
js_ExpandErrorArguments(JSContext *cx, JSErrorCallback callback,
void *userRef, const uintN errorNumber,
char **message, JSErrorReport *reportp,
JSBool *warningp, JSBool charArgs, va_list ap);
#endif
extern void
js_ReportOutOfMemory(JSContext *cx);
/*
* Report an exception using a previously composed JSErrorReport.
* XXXbe remove from "friend" API
*/
extern JS_FRIEND_API(void)
js_ReportErrorAgain(JSContext *cx, const char *message, JSErrorReport *report);
extern void
js_ReportIsNotDefined(JSContext *cx, const char *name);
extern JSErrorFormatString js_ErrorFormatString[JSErr_Limit];
/*
* See JS_SetThreadStackLimit in jsapi.c, where we check that the stack grows
* in the expected direction. On Unix-y systems, JS_STACK_GROWTH_DIRECTION is
* computed on the build host by jscpucfg.c and written into jsautocfg.h. The
* macro is hardcoded in jscpucfg.h on Windows and Mac systems (for historical
* reasons pre-dating autoconf usage).
*/
#if JS_STACK_GROWTH_DIRECTION > 0
# define JS_CHECK_STACK_SIZE(cx, lval) ((jsuword)&(lval) < (cx)->stackLimit)
#else
# define JS_CHECK_STACK_SIZE(cx, lval) ((jsuword)&(lval) > (cx)->stackLimit)
#endif
JS_END_EXTERN_C
#endif /* jscntxt_h___ */
|