LCOV - code coverage report
Current view: directory - js/src/perf - jsperf.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 89 31 34.8 %
Date: 2012-06-02 Functions: 22 5 22.7 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * the Mozilla Foundation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Zack Weinberg <zweinberg@mozilla.com>  (original author)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "jsperf.h"
      40                 : #include "jscntxt.h" /* for error messages */
      41                 : #include "jsobj.h" /* for unwrapping without a context */
      42                 : 
      43                 : #include "jsobjinlines.h"
      44                 : 
      45                 : using JS::PerfMeasurement;
      46                 : 
      47                 : // You cannot forward-declare a static object in C++, so instead
      48                 : // we have to forward-declare the helper functions that refer to it.
      49                 : static PerfMeasurement* GetPM(JSContext* cx, JSObject* obj, const char* fname);
      50                 : static PerfMeasurement* GetPMFromThis(JSContext* cx, jsval* vp);
      51                 : 
      52                 : // Constructor and destructor
      53                 : 
      54                 : static JSBool
      55               9 : pm_construct(JSContext* cx, unsigned argc, jsval* vp)
      56                 : {
      57                 :     uint32_t mask;
      58               9 :     if (!JS_ConvertArguments(cx, argc, JS_ARGV(cx, vp), "u", &mask))
      59               0 :         return JS_FALSE;
      60                 : 
      61               9 :     JSObject *obj = JS_NewObjectForConstructor(cx, vp);
      62               9 :     if (!obj)
      63               0 :         return JS_FALSE;
      64                 : 
      65               9 :     if (!JS_FreezeObject(cx, obj))
      66               0 :         return JS_FALSE;
      67                 : 
      68               9 :     PerfMeasurement* p = cx->new_<PerfMeasurement>(PerfMeasurement::EventMask(mask));
      69               9 :     if (!p) {
      70               0 :         JS_ReportOutOfMemory(cx);
      71               0 :         return JS_FALSE;
      72                 :     }
      73                 : 
      74               9 :     JS_SetPrivate(obj, p);
      75               9 :     *vp = OBJECT_TO_JSVAL(obj);
      76               9 :     return JS_TRUE;
      77                 : }
      78                 : 
      79                 : static void
      80           22833 : pm_finalize(JSContext* cx, JSObject* obj)
      81                 : {
      82           22833 :     cx->delete_((PerfMeasurement*) JS_GetPrivate(obj));
      83           22833 : }
      84                 : 
      85                 : // Property access
      86                 : 
      87                 : #define GETTER(name)                                                    \
      88                 :     static JSBool                                                       \
      89                 :     pm_get_##name(JSContext* cx, JSObject* obj, jsid /*unused*/, jsval* vp) \
      90                 :     {                                                                   \
      91                 :         PerfMeasurement* p = GetPM(cx, obj, #name);                     \
      92                 :         if (!p)                                                         \
      93                 :             return JS_FALSE;                                            \
      94                 :         return JS_NewNumberValue(cx, double(p->name), vp);              \
      95                 :     }
      96                 : 
      97               0 : GETTER(cpu_cycles)
      98               0 : GETTER(instructions)
      99               0 : GETTER(cache_references)
     100               0 : GETTER(cache_misses)
     101               0 : GETTER(branch_instructions)
     102               0 : GETTER(branch_misses)
     103               0 : GETTER(bus_cycles)
     104               0 : GETTER(page_faults)
     105               0 : GETTER(major_page_faults)
     106               0 : GETTER(context_switches)
     107               0 : GETTER(cpu_migrations)
     108               9 : GETTER(eventsMeasured)
     109                 : 
     110                 : #undef GETTER
     111                 : 
     112                 : // Calls
     113                 : 
     114                 : static JSBool
     115               0 : pm_start(JSContext* cx, unsigned /*unused*/, jsval* vp)
     116                 : {
     117               0 :     PerfMeasurement* p = GetPMFromThis(cx, vp);
     118               0 :     if (!p)
     119               0 :         return JS_FALSE;
     120                 : 
     121               0 :     p->start();
     122               0 :     return JS_TRUE;
     123                 : }
     124                 : 
     125                 : static JSBool
     126               0 : pm_stop(JSContext* cx, unsigned /*unused*/, jsval* vp)
     127                 : {
     128               0 :     PerfMeasurement* p = GetPMFromThis(cx, vp);
     129               0 :     if (!p)
     130               0 :         return JS_FALSE;
     131                 : 
     132               0 :     p->stop();
     133               0 :     return JS_TRUE;
     134                 : }
     135                 : 
     136                 : static JSBool
     137               0 : pm_reset(JSContext* cx, unsigned /*unused*/, jsval* vp)
     138                 : {
     139               0 :     PerfMeasurement* p = GetPMFromThis(cx, vp);
     140               0 :     if (!p)
     141               0 :         return JS_FALSE;
     142                 : 
     143               0 :     p->reset();
     144               0 :     return JS_TRUE;
     145                 : }
     146                 : 
     147                 : static JSBool
     148               0 : pm_canMeasureSomething(JSContext* cx, unsigned /*unused*/, jsval* vp)
     149                 : {
     150               0 :     PerfMeasurement* p = GetPMFromThis(cx, vp);
     151               0 :     if (!p)
     152               0 :         return JS_FALSE;
     153                 : 
     154               0 :     JS_SET_RVAL(cx, vp, BOOLEAN_TO_JSVAL(p->canMeasureSomething()));
     155               0 :     return JS_TRUE;
     156                 : }
     157                 : 
     158                 : const uint8_t PM_FATTRS = JSPROP_READONLY | JSPROP_PERMANENT | JSPROP_SHARED;
     159                 : static JSFunctionSpec pm_fns[] = {
     160                 :     JS_FN("start",               pm_start,               0, PM_FATTRS),
     161                 :     JS_FN("stop",                pm_stop,                0, PM_FATTRS),
     162                 :     JS_FN("reset",               pm_reset,               0, PM_FATTRS),
     163                 :     JS_FN("canMeasureSomething", pm_canMeasureSomething, 0, PM_FATTRS),
     164                 :     JS_FS_END
     165                 : };
     166                 : 
     167                 : const uint8_t PM_PATTRS =
     168                 :     JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT | JSPROP_SHARED;
     169                 : 
     170                 : #define GETTER(name)                            \
     171                 :     { #name, 0, PM_PATTRS, pm_get_##name, 0 }
     172                 : 
     173                 : static JSPropertySpec pm_props[] = {
     174                 :     GETTER(cpu_cycles),
     175                 :     GETTER(instructions),
     176                 :     GETTER(cache_references),
     177                 :     GETTER(cache_misses),
     178                 :     GETTER(branch_instructions),
     179                 :     GETTER(branch_misses),
     180                 :     GETTER(bus_cycles),
     181                 :     GETTER(page_faults),
     182                 :     GETTER(major_page_faults),
     183                 :     GETTER(context_switches),
     184                 :     GETTER(cpu_migrations),
     185                 :     GETTER(eventsMeasured),
     186                 :     {0,0,0,0,0}
     187                 : };
     188                 : 
     189                 : #undef GETTER
     190                 : 
     191                 : // If this were C++ these would be "static const" members.
     192                 : 
     193                 : const uint8_t PM_CATTRS = JSPROP_ENUMERATE|JSPROP_READONLY|JSPROP_PERMANENT;
     194                 : 
     195                 : #define CONSTANT(name) { #name, PerfMeasurement::name }
     196                 : 
     197                 : static const struct pm_const {
     198                 :     const char *name;
     199                 :     PerfMeasurement::EventMask value;
     200                 : } pm_consts[] = {
     201                 :     CONSTANT(CPU_CYCLES),
     202                 :     CONSTANT(INSTRUCTIONS),
     203                 :     CONSTANT(CACHE_REFERENCES),
     204                 :     CONSTANT(CACHE_MISSES),
     205                 :     CONSTANT(BRANCH_INSTRUCTIONS),
     206                 :     CONSTANT(BRANCH_MISSES),
     207                 :     CONSTANT(BUS_CYCLES),
     208                 :     CONSTANT(PAGE_FAULTS),
     209                 :     CONSTANT(MAJOR_PAGE_FAULTS),
     210                 :     CONSTANT(CONTEXT_SWITCHES),
     211                 :     CONSTANT(CPU_MIGRATIONS),
     212                 :     CONSTANT(ALL),
     213                 :     CONSTANT(NUM_MEASURABLE_EVENTS),
     214                 :     { 0, PerfMeasurement::EventMask(0) }
     215                 : };
     216                 : 
     217                 : #undef CONSTANT
     218                 : 
     219                 : static JSClass pm_class = {
     220                 :     "PerfMeasurement", JSCLASS_HAS_PRIVATE,
     221                 :     JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
     222                 :     JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, pm_finalize,
     223                 :     JSCLASS_NO_OPTIONAL_MEMBERS
     224                 : };
     225                 : 
     226                 : // Helpers (declared above)
     227                 : 
     228                 : static PerfMeasurement*
     229               9 : GetPM(JSContext* cx, JSObject* obj, const char* fname)
     230                 : {
     231                 :     PerfMeasurement* p = (PerfMeasurement*)
     232               9 :         JS_GetInstancePrivate(cx, obj, &pm_class, 0);
     233               9 :     if (p)
     234               9 :         return p;
     235                 : 
     236                 :     // JS_GetInstancePrivate only sets an exception if its last argument
     237                 :     // is nonzero, so we have to do it by hand.
     238                 :     JS_ReportErrorNumber(cx, js_GetErrorMessage, 0, JSMSG_INCOMPATIBLE_PROTO,
     239               0 :                          pm_class.name, fname, JS_GetClass(obj)->name);
     240               0 :     return 0;
     241                 : }
     242                 : 
     243                 : static PerfMeasurement*
     244               0 : GetPMFromThis(JSContext* cx, jsval* vp)
     245                 : {
     246               0 :     JSObject* this_ = JS_THIS_OBJECT(cx, vp);
     247               0 :     if (!this_)
     248               0 :         return 0;
     249                 :     return (PerfMeasurement*)
     250               0 :         JS_GetInstancePrivate(cx, this_, &pm_class, JS_ARGV(cx, vp));
     251                 : }
     252                 : 
     253                 : namespace JS {
     254                 : 
     255                 : JSObject*
     256           22824 : RegisterPerfMeasurement(JSContext *cx, JSObject *global)
     257                 : {
     258           45648 :     js::RootedVarObject prototype(cx);
     259                 :     prototype = JS_InitClass(cx, global, 0 /* parent */,
     260                 :                              &pm_class, pm_construct, 1,
     261           22824 :                              pm_props, pm_fns, 0, 0);
     262           22824 :     if (!prototype)
     263               0 :         return 0;
     264                 : 
     265           45648 :     js::RootedVarObject ctor(cx);
     266           22824 :     ctor = JS_GetConstructor(cx, prototype);
     267           22824 :     if (!ctor)
     268               0 :         return 0;
     269                 : 
     270          319536 :     for (const pm_const *c = pm_consts; c->name; c++) {
     271          593424 :         if (!JS_DefineProperty(cx, ctor, c->name, INT_TO_JSVAL(c->value),
     272          296712 :                                JS_PropertyStub, JS_StrictPropertyStub, PM_CATTRS))
     273               0 :             return 0;
     274                 :     }
     275                 : 
     276           45648 :     if (!JS_FreezeObject(cx, prototype) ||
     277           22824 :         !JS_FreezeObject(cx, ctor)) {
     278               0 :         return 0;
     279                 :     }
     280                 : 
     281           22824 :     return prototype;
     282                 : }
     283                 : 
     284                 : PerfMeasurement*
     285               0 : ExtractPerfMeasurement(jsval wrapper)
     286                 : {
     287               0 :     if (JSVAL_IS_PRIMITIVE(wrapper))
     288               0 :         return 0;
     289                 : 
     290                 :     // This is what JS_GetInstancePrivate does internally.  We can't
     291                 :     // call JS_anything from here, because we don't have a JSContext.
     292               0 :     JSObject *obj = JSVAL_TO_OBJECT(wrapper);
     293               0 :     if (obj->getClass() != js::Valueify(&pm_class))
     294               0 :         return 0;
     295                 : 
     296               0 :     return (PerfMeasurement*) obj->getPrivate();
     297                 : }
     298                 : 
     299                 : } // namespace JS

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