bulk move of code to src/ SERVER-4551

1 files changed, 368 insertions, 0 deletions

diff --git a/src/third_party/js-1.7/jsgc.h b/src/third_party/js-1.7/jsgc.h
new file mode 100644
index 00000000000..ec623a1a331
--- /dev/null
+++ b/src/third_party/js-1.7/jsgc.h
@@ -0,0 +1,368 @@
+/* -*- 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 jsgc_h___
+#define jsgc_h___
+/*
+ * JS Garbage Collector.
+ */
+#include "jsprvtd.h"
+#include "jspubtd.h"
+#include "jsdhash.h"
+#include "jsutil.h"
+
+JS_BEGIN_EXTERN_C
+
+/* GC thing type indexes. */
+#define GCX_OBJECT              0               /* JSObject */
+#define GCX_STRING              1               /* JSString */
+#define GCX_DOUBLE              2               /* jsdouble */
+#define GCX_MUTABLE_STRING      3               /* JSString that's mutable --
+                                                   single-threaded only! */
+#define GCX_PRIVATE             4               /* private (unscanned) data */
+#define GCX_NAMESPACE           5               /* JSXMLNamespace */
+#define GCX_QNAME               6               /* JSXMLQName */
+#define GCX_XML                 7               /* JSXML */
+#define GCX_EXTERNAL_STRING     8               /* JSString w/ external chars */
+
+#define GCX_NTYPES_LOG2         4               /* type index bits */
+#define GCX_NTYPES              JS_BIT(GCX_NTYPES_LOG2)
+
+/* GC flag definitions, must fit in 8 bits (type index goes in the low bits). */
+#define GCF_TYPEMASK    JS_BITMASK(GCX_NTYPES_LOG2)
+#define GCF_MARK        JS_BIT(GCX_NTYPES_LOG2)
+#define GCF_FINAL       JS_BIT(GCX_NTYPES_LOG2 + 1)
+#define GCF_SYSTEM      JS_BIT(GCX_NTYPES_LOG2 + 2)
+#define GCF_LOCKSHIFT   (GCX_NTYPES_LOG2 + 3)   /* lock bit shift */
+#define GCF_LOCK        JS_BIT(GCF_LOCKSHIFT)   /* lock request bit in API */
+
+/* Pseudo-flag that modifies GCX_STRING to make GCX_MUTABLE_STRING. */
+#define GCF_MUTABLE     2
+
+#if (GCX_STRING | GCF_MUTABLE) != GCX_MUTABLE_STRING
+# error "mutable string type index botch!"
+#endif
+
+extern uint8 *
+js_GetGCThingFlags(void *thing);
+
+/*
+ * The sole purpose of the function is to preserve public API compatibility
+ * in JS_GetStringBytes which takes only single JSString* argument.
+ */
+JSRuntime*
+js_GetGCStringRuntime(JSString *str);
+
+#if 1
+/*
+ * Since we're forcing a GC from JS_GC anyway, don't bother wasting cycles
+ * loading oldval.  XXX remove implied force, fix jsinterp.c's "second arg
+ * ignored", etc.
+ */
+#define GC_POKE(cx, oldval) ((cx)->runtime->gcPoke = JS_TRUE)
+#else
+#define GC_POKE(cx, oldval) ((cx)->runtime->gcPoke = JSVAL_IS_GCTHING(oldval))
+#endif
+
+extern intN
+js_ChangeExternalStringFinalizer(JSStringFinalizeOp oldop,
+                                 JSStringFinalizeOp newop);
+
+extern JSBool
+js_InitGC(JSRuntime *rt, uint32 maxbytes);
+
+extern void
+js_FinishGC(JSRuntime *rt);
+
+extern JSBool
+js_AddRoot(JSContext *cx, void *rp, const char *name);
+
+extern JSBool
+js_AddRootRT(JSRuntime *rt, void *rp, const char *name);
+
+extern JSBool
+js_RemoveRoot(JSRuntime *rt, void *rp);
+
+#ifdef DEBUG
+extern void
+js_DumpNamedRoots(JSRuntime *rt,
+                  void (*dump)(const char *name, void *rp, void *data),
+                  void *data);
+#endif
+
+extern uint32
+js_MapGCRoots(JSRuntime *rt, JSGCRootMapFun map, void *data);
+
+/* Table of pointers with count valid members. */
+typedef struct JSPtrTable {
+    size_t      count;
+    void        **array;
+} JSPtrTable;
+
+extern JSBool
+js_RegisterCloseableIterator(JSContext *cx, JSObject *obj);
+
+#if JS_HAS_GENERATORS
+
+/*
+ * Runtime state to support generators' close hooks.
+ */
+typedef struct JSGCCloseState {
+    /*
+     * Singly linked list of generators that are reachable from GC roots or
+     * were created after the last GC.
+     */
+    JSGenerator         *reachableList;
+
+    /*
+     * Head of the queue of generators that have already become unreachable but
+     * whose close hooks are not yet run.
+     */
+    JSGenerator         *todoQueue;
+
+#ifndef JS_THREADSAFE
+    /*
+     * Flag indicating that the current thread is excuting a close hook for
+     * single thread case.
+     */
+    JSBool              runningCloseHook;
+#endif
+} JSGCCloseState;
+
+extern void
+js_RegisterGenerator(JSContext *cx, JSGenerator *gen);
+
+extern JSBool
+js_RunCloseHooks(JSContext *cx);
+
+#endif
+
+/*
+ * The private JSGCThing struct, which describes a gcFreeList element.
+ */
+struct JSGCThing {
+    JSGCThing   *next;
+    uint8       *flagp;
+};
+
+#define GC_NBYTES_MAX           (10 * sizeof(JSGCThing))
+#define GC_NUM_FREELISTS        (GC_NBYTES_MAX / sizeof(JSGCThing))
+#define GC_FREELIST_NBYTES(i)   (((i) + 1) * sizeof(JSGCThing))
+#define GC_FREELIST_INDEX(n)    (((n) / sizeof(JSGCThing)) - 1)
+
+extern void *
+js_NewGCThing(JSContext *cx, uintN flags, size_t nbytes);
+
+extern JSBool
+js_LockGCThing(JSContext *cx, void *thing);
+
+extern JSBool
+js_LockGCThingRT(JSRuntime *rt, void *thing);
+
+extern JSBool
+js_UnlockGCThingRT(JSRuntime *rt, void *thing);
+
+extern JSBool
+js_IsAboutToBeFinalized(JSContext *cx, void *thing);
+
+extern void
+js_MarkAtom(JSContext *cx, JSAtom *atom);
+
+/* We avoid a large number of unnecessary calls by doing the flag check first */
+#define GC_MARK_ATOM(cx, atom)                                                \
+    JS_BEGIN_MACRO                                                            \
+        if (!((atom)->flags & ATOM_MARK))                                     \
+            js_MarkAtom(cx, atom);                                            \
+    JS_END_MACRO
+
+/*
+ * Always use GC_MARK macro and never call js_MarkGCThing directly so
+ * when GC_MARK_DEBUG is defined the dump of live GC things does not miss
+ * a thing.
+ */
+extern void
+js_MarkGCThing(JSContext *cx, void *thing);
+
+#ifdef GC_MARK_DEBUG
+
+# define GC_MARK(cx, thing, name) js_MarkNamedGCThing(cx, thing, name)
+
+extern void
+js_MarkNamedGCThing(JSContext *cx, void *thing, const char *name);
+
+extern JS_FRIEND_DATA(FILE *) js_DumpGCHeap;
+JS_EXTERN_DATA(void *) js_LiveThingToFind;
+
+#else
+
+# define GC_MARK(cx, thing, name) js_MarkGCThing(cx, thing)
+
+#endif
+
+extern void
+js_MarkStackFrame(JSContext *cx, JSStackFrame *fp);
+
+/*
+ * Kinds of js_GC invocation.
+ */
+typedef enum JSGCInvocationKind {
+    /* Normal invocation. */
+    GC_NORMAL,
+
+    /*
+     * Called from js_DestroyContext for last JSContext in a JSRuntime, when
+     * it is imperative that rt->gcPoke gets cleared early in js_GC.
+     */
+    GC_LAST_CONTEXT,
+
+    /*
+     * Called from js_NewGCThing as a last-ditch GC attempt. See comments
+     * before js_GC definition for details.
+     */
+    GC_LAST_DITCH
+} JSGCInvocationKind;
+
+extern void
+js_GC(JSContext *cx, JSGCInvocationKind gckind);
+
+/* Call this after succesful malloc of memory for GC-related things. */
+extern void
+js_UpdateMallocCounter(JSContext *cx, size_t nbytes);
+
+#ifdef DEBUG_notme
+#define JS_GCMETER 1
+#endif
+
+#ifdef JS_GCMETER
+
+typedef struct JSGCStats {
+#ifdef JS_THREADSAFE
+    uint32  localalloc; /* number of succeeded allocations from local lists */
+#endif
+    uint32  alloc;      /* number of allocation attempts */
+    uint32  retry;      /* allocation attempt retries after running the GC */
+    uint32  retryhalt;  /* allocation retries halted by the branch callback */
+    uint32  fail;       /* allocation failures */
+    uint32  finalfail;  /* finalizer calls allocator failures */
+    uint32  lockborn;   /* things born locked */
+    uint32  lock;       /* valid lock calls */
+    uint32  unlock;     /* valid unlock calls */
+    uint32  depth;      /* mark tail recursion depth */
+    uint32  maxdepth;   /* maximum mark tail recursion depth */
+    uint32  cdepth;     /* mark recursion depth of C functions */
+    uint32  maxcdepth;  /* maximum mark recursion depth of C functions */
+    uint32  unscanned;  /* mark C stack overflows or number of times
+                           GC things were put in unscanned bag */
+#ifdef DEBUG
+    uint32  maxunscanned;       /* maximum size of unscanned bag */
+#endif
+    uint32  maxlevel;   /* maximum GC nesting (indirect recursion) level */
+    uint32  poke;       /* number of potentially useful GC calls */
+    uint32  nopoke;     /* useless GC calls where js_PokeGC was not set */
+    uint32  afree;      /* thing arenas freed so far */
+    uint32  stackseg;   /* total extraordinary stack segments scanned */
+    uint32  segslots;   /* total stack segment jsval slots scanned */
+    uint32  nclose;     /* number of objects with close hooks */
+    uint32  maxnclose;  /* max number of objects with close hooks */
+    uint32  closelater; /* number of close hooks scheduled to run */
+    uint32  maxcloselater; /* max number of close hooks scheduled to run */
+} JSGCStats;
+
+extern JS_FRIEND_API(void)
+js_DumpGCStats(JSRuntime *rt, FILE *fp);
+
+#endif /* JS_GCMETER */
+
+typedef struct JSGCArena JSGCArena;
+typedef struct JSGCArenaList JSGCArenaList;
+
+#ifdef JS_GCMETER
+typedef struct JSGCArenaStats JSGCArenaStats;
+
+struct JSGCArenaStats {
+    uint32  narenas;        /* number of arena in list */
+    uint32  maxarenas;      /* maximun number of allocated arenas */
+    uint32  nthings;        /* number of allocates JSGCThing */
+    uint32  maxthings;      /* maximum number number of allocates JSGCThing */
+    uint32  totalnew;       /* number of succeeded calls to js_NewGCThing */
+    uint32  freelen;        /* freeList lengths */
+    uint32  recycle;        /* number of things recycled through freeList */
+    uint32  totalarenas;    /* total number of arenas with live things that
+                               GC scanned so far */
+    uint32  totalfreelen;   /* total number of things that GC put to free
+                               list so far */
+};
+#endif
+
+struct JSGCArenaList {
+    JSGCArena   *last;          /* last allocated GC arena */
+    uint16      lastLimit;      /* end offset of allocated so far things in
+                                   the last arena */
+    uint16      thingSize;      /* size of things to allocate on this list */
+    JSGCThing   *freeList;      /* list of free GC things */
+#ifdef JS_GCMETER
+    JSGCArenaStats stats;
+#endif
+};
+
+typedef struct JSWeakRoots {
+    /* 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;
+} JSWeakRoots;
+
+JS_STATIC_ASSERT(JSVAL_NULL == 0);
+#define JS_CLEAR_WEAK_ROOTS(wr) (memset((wr), 0, sizeof(JSWeakRoots)))
+
+#ifdef DEBUG_notme
+#define TOO_MUCH_GC 1
+#endif
+
+#ifdef WAY_TOO_MUCH_GC
+#define TOO_MUCH_GC 1
+#endif
+
+JS_END_EXTERN_C
+
+#endif /* jsgc_h___ */