Mercurial > spidermonkey-playground

annotate memory_profiler.cpp @ 58:0b66a265df13

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Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
author Atul Varma <varmaa@toolness.com>
date Wed, 24 Jun 2009 21:15:45 -0700
parents 1fd63ee398dc
children ab600a5e6516
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
50
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1 #include "jsdhash.h"
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2 #include "jsdbgapi.h"
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3
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4 #include "memory_profiler.h"
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5 #include "server_socket.h"
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6
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7 #define SERVER_FILENAME "memory_profiler_server.js"
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8
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9 // TODO: Lots of code here is copied from spidermonkey-playground.cpp; we should
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10 // consolidate it.
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11
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12 /* The error reporter callback. */
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13 static void reportError(JSContext *cx, const char *message, JSErrorReport *report)
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14 {
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15 fprintf(stderr, "%s:%u:%s\n",
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16 report->filename ? report->filename : "<no filename>",
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17 (unsigned int) report->lineno,
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18 message);
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19 }
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20
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21 static JSClass global_class = {
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22 "serverGlobal", JSCLASS_GLOBAL_FLAGS,
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23 JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
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24 JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
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25 JSCLASS_NO_OPTIONAL_MEMBERS
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26 };
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27
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28 // This native JS function prints the given string to the console.
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29
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30 static JSBool print(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
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31 jsval *rval)
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32 {
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33 char *str;
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34
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35 if (!JS_ConvertArguments(cx, argc, argv, "s", &str))
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36 return JS_FALSE;
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37
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38 printf("%s\n", str);
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39
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40 return JS_TRUE;
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41 }
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42
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43 // Private structure to track the state of tracing the JS heap.
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44
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45 typedef struct TracingState {
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46 // Keeps track of what objects we've visited so far.
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47 JSDHashTable visited;
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48
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49 // Whether the tracing operation is successful or failed.
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50 JSBool result;
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51
51
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52 // Runtime that we're tracing.
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53 JSRuntime *runtime;
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54
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55 // Structure required to use JS tracing functions.
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56 JSTracer tracer;
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57 };
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58
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59 // Static singleton for tracking the state of tracing the JS heap.
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60 static TracingState tracingState;
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61
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62 typedef struct ChildTracingState {
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63 int num;
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64 void **things;
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65 uint32 *kinds;
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66 JSTracer tracer;
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67 };
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68
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69 static ChildTracingState childTracingState;
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70
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71 // JSTraceCallback to build a hashtable of children.
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72 static void childCountBuilder(JSTracer *trc, void *thing, uint32 kind)
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73 {
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74 childTracingState.num++;
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75 }
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76
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77 // JSTraceCallback to build a hashtable of children.
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78 static void childBuilder(JSTracer *trc, void *thing, uint32 kind)
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79 {
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80 *childTracingState.kinds = kind;
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81 childTracingState.kinds++;
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82 *childTracingState.things = thing;
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83 childTracingState.things++;
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84 }
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85
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86 // JSTraceCallback to build a hashtable of existing object references.
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87 static void visitedBuilder(JSTracer *trc, void *thing, uint32 kind)
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88 {
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89 switch (kind) {
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90 case JSTRACE_OBJECT:
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91 JSDHashEntryStub *entry = (JSDHashEntryStub *)
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92 JS_DHashTableOperate(&tracingState.visited,
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93 thing,
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94 JS_DHASH_LOOKUP);
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95 if (JS_DHASH_ENTRY_IS_FREE((JSDHashEntryHdr *)entry)) {
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96 entry = (JSDHashEntryStub *) JS_DHashTableOperate(&tracingState.visited,
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97 thing,
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98 JS_DHASH_ADD);
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99 if (entry == NULL) {
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100 JS_ReportOutOfMemory(trc->context);
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101 tracingState.result = JS_FALSE;
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102 return;
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103 }
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104 entry->key = thing;
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105 JS_TraceChildren(trc, thing, kind);
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106 }
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107 break;
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108 case JSTRACE_DOUBLE:
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109 break;
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110 case JSTRACE_STRING:
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111 break;
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112 }
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113 }
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114
51
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115 static intN countRoots(void *rp, const char *name, void *data)
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116 {
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117 return JS_MAP_GCROOT_NEXT;
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118 }
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119
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120 static intN rootMapFun(void *rp, const char *name, void *data)
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121 {
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122 jsval **currIndex = (jsval **) data;
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123 **currIndex = INT_TO_JSVAL((unsigned int) rp);
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124 *currIndex++;
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125 return JS_MAP_GCROOT_NEXT;
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126 }
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127
57
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128 static JSBool getChildrenInfo(JSContext *cx, JSObject *info,
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129 JSObject *target, JSContext *targetCx)
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130 {
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131 childTracingState.tracer.context = targetCx;
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132 childTracingState.tracer.callback = childCountBuilder;
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133 childTracingState.num = 0;
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134 JS_TraceChildren(&childTracingState.tracer, target, JSTRACE_OBJECT);
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135
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136 void *things[childTracingState.num];
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137 uint32 kinds[childTracingState.num];
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138
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139 childTracingState.things = things;
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140 childTracingState.kinds = kinds;
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141
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142 childTracingState.tracer.callback = childBuilder;
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143 JS_TraceChildren(&childTracingState.tracer, target, JSTRACE_OBJECT);
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144
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145 int numObjectChildren = 0;
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146 for (int i = 0; i < childTracingState.num; i++) {
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147 if (kinds[i] == JSTRACE_OBJECT)
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148 numObjectChildren++;
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149 }
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150
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diff changeset
151 jsval childrenVals[numObjectChildren];
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152
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153 int currChild = 0;
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154 for (int i = 0; i < childTracingState.num; i++) {
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155 if (kinds[i] == JSTRACE_OBJECT) {
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156 childrenVals[currChild] = INT_TO_JSVAL((unsigned int) things[i]);
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157 currChild += 1;
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158 }
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159 }
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160
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161 JSObject *children = JS_NewArrayObject(cx, numObjectChildren, childrenVals);
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162 if (children == NULL) {
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163 JS_ReportOutOfMemory(cx);
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164 return JS_FALSE;
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165 }
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166
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167 return JS_DefineProperty(cx, info, "children", OBJECT_TO_JSVAL(children),
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168 NULL, NULL, JSPROP_ENUMERATE);
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169 }
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170
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171 static JSBool getObjInfo(JSContext *cx, JSObject *obj, uintN argc,
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172 jsval *argv, jsval *rval)
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173 {
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174 uint32 id;
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175
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176 if (!JS_ConvertArguments(cx, argc, argv, "u", &id))
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177 return JS_FALSE;
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178
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179 JSDHashEntryStub *entry = (JSDHashEntryStub *)
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180 JS_DHashTableOperate(&tracingState.visited,
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181 (void *) id,
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diff changeset
182 JS_DHASH_LOOKUP);
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diff changeset
183 if (entry == NULL) {
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184 JS_ReportOutOfMemory(cx);
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185 return JS_FALSE;
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186 }
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187
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188 if (JS_DHASH_ENTRY_IS_BUSY((JSDHashEntryHdr *)entry)) {
c451579bf83c Built out more of the /objects/ method.
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189 JSObject *info = JS_NewObject(cx, NULL, NULL, NULL);
55
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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190
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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191 JSObject *target = (JSObject *) id;
56
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192 JSContext *targetCx = tracingState.tracer.context;
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193 JSClass *classp = JS_GET_CLASS(targetCx, target);
55
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194 if (classp != NULL) {
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diff changeset
195 // TODO: Should really be using an interned string here or something.
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196 JSString *name = JS_NewStringCopyZ(cx, classp->name);
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diff changeset
197 if (name == NULL) {
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diff changeset
198 JS_ReportOutOfMemory(cx);
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diff changeset
199 return JS_FALSE;
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
200 }
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
201 if (!JS_DefineProperty(cx, info, "nativeClass", STRING_TO_JSVAL(name),
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
202 NULL, NULL, JSPROP_ENUMERATE)) {
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
203 JS_ReportOutOfMemory(cx);
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
204 return JS_FALSE;
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
205 }
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
206 }
1aba1b7a0a2c Added a 'nativeClass' property to object info method.
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diff changeset
207
56
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diff changeset
208 if (!JS_DefineProperty(
b36c15de56f6 added a size property to info
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diff changeset
209 cx, info, "size",
b36c15de56f6 added a size property to info
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diff changeset
210 INT_TO_JSVAL(JS_GetObjectTotalSize(targetCx, target)),
b36c15de56f6 added a size property to info
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diff changeset
211 NULL, NULL, JSPROP_ENUMERATE)) {
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diff changeset
212 JS_ReportOutOfMemory(cx);
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diff changeset
213 return JS_FALSE;
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parents: 55
diff changeset
214 }
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diff changeset
215
57
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diff changeset
216 if (!getChildrenInfo(cx, info, target, targetCx))
1fd63ee398dc Added some really terrible code that adds a 'children' array property to object info.
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diff changeset
217 return JS_FALSE;
1fd63ee398dc Added some really terrible code that adds a 'children' array property to object info.
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diff changeset
218
54
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diff changeset
219 *rval = OBJECT_TO_JSVAL(info);
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diff changeset
220 } else
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diff changeset
221 *rval = JSVAL_NULL;
c451579bf83c Built out more of the /objects/ method.
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diff changeset
222
c451579bf83c Built out more of the /objects/ method.
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diff changeset
223 return JS_TRUE;
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parents: 51
diff changeset
224 }
c451579bf83c Built out more of the /objects/ method.
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diff changeset
225
51
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diff changeset
226 static JSBool getGCRoots(JSContext *cx, JSObject *obj, uintN argc,
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
227 jsval *argv, jsval *rval)
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
228 {
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
229 uint32 numRoots = JS_MapGCRoots(tracingState.runtime, countRoots, NULL);
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
230 jsval rootList[numRoots];
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
231 jsval *currIndex = rootList;
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
232
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
233 JS_MapGCRoots(tracingState.runtime, rootMapFun, &currIndex);
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
234
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
235 JSObject *roots = JS_NewArrayObject(cx, numRoots, rootList);
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
236 if (roots == NULL) {
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
237 JS_ReportError(cx, "Creating array failed.");
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
238 return JS_FALSE;
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
239 }
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
240
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
241 *rval = OBJECT_TO_JSVAL(roots);
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
242 return JS_TRUE;
8750e9ecf3af Added a getGCRoots() function.
Atul Varma <varmaa@toolness.com>
parents: 50
diff changeset
243 }
8750e9ecf3af Added a getGCRoots() function.
Atul Varma <varmaa@toolness.com>
parents: 50
diff changeset
244
50
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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parents:
diff changeset
245 static JSFunctionSpec server_global_functions[] = {
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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parents:
diff changeset
246 JS_FS("print", print, 1, 0, 0),
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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parents:
diff changeset
247 JS_FS("ServerSocket", createServerSocket, 0, 0, 0),
51
8750e9ecf3af Added a getGCRoots() function.
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diff changeset
248 JS_FS("getGCRoots", getGCRoots, 0, 0, 0),
54
c451579bf83c Built out more of the /objects/ method.
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parents: 51
diff changeset
249 JS_FS("getObjectInfo", getObjInfo, 1, 0, 0),
50
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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parents:
diff changeset
250 JS_FS_END
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
Atul Varma <varmaa@toolness.com>
parents:
diff changeset
251 };
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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parents:
diff changeset
252
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
Atul Varma <varmaa@toolness.com>
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253 JSBool profileMemory(JSContext *cx, JSObject *obj, uintN argc,
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254 jsval *argv, jsval *rval)
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255 {
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256 if (!JS_DHashTableInit(&tracingState.visited, JS_DHashGetStubOps(),
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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257 NULL, sizeof(JSDHashEntryStub),
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258 JS_DHASH_DEFAULT_CAPACITY(100))) {
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259 JS_ReportOutOfMemory(cx);
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260 return JS_FALSE;
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261 }
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262
51
8750e9ecf3af Added a getGCRoots() function.
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263 tracingState.runtime = JS_GetRuntime(cx);
50
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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264 tracingState.result = JS_TRUE;
51
8750e9ecf3af Added a getGCRoots() function.
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265 tracingState.tracer.context = cx;
57
1fd63ee398dc Added some really terrible code that adds a 'children' array property to object info.
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266 tracingState.tracer.callback = visitedBuilder;
51
8750e9ecf3af Added a getGCRoots() function.
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267 JS_TraceRuntime(&tracingState.tracer);
50
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268
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269 if (!tracingState.result)
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270 return JS_FALSE;
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271
51
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272 JSRuntime *serverRuntime = JS_NewRuntime(8L * 1024L * 1024L);
50
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273 if (serverRuntime == NULL) {
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274 JS_ReportError(cx, "Couldn't create server JS runtime.");
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275 return JS_FALSE;
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276 }
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277
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278 JSContext *serverCx = JS_NewContext(serverRuntime, 8192);
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279 if (serverCx == NULL) {
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280 JS_ReportError(cx, "Couldn't create server JS context.");
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281 return JS_FALSE;
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282 }
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283 JS_SetOptions(serverCx, JSOPTION_VAROBJFIX);
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284 JS_SetVersion(serverCx, JSVERSION_LATEST);
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285 JS_SetErrorReporter(serverCx, reportError);
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286
58
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
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diff changeset
287 JS_BeginRequest(serverCx);
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288
50
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289 JSObject *serverGlobal = JS_NewObject(serverCx, &global_class, NULL, NULL);
58
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
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290
50
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291 if (serverGlobal == NULL) {
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292 JS_ReportError(cx, "Couldn't create server JS global.");
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293 return JS_FALSE;
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294 }
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295
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296 if (!JS_InitStandardClasses(serverCx, serverGlobal)) {
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297 JS_ReportError(cx, "Couldn't init standard classes on server JS global.");
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298 return JS_FALSE;
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299 }
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300
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301 if (!JS_DefineFunctions(serverCx, serverGlobal, server_global_functions)) {
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302 JS_ReportError(cx, "Couldn't define functions on server JS global.");
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303 return JS_FALSE;
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304 }
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305
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306 FILE *f = fopen(SERVER_FILENAME, "r");
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307 if (!f) {
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308 JS_ReportError(cx, "Couldn't open " SERVER_FILENAME);
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309 return JS_FALSE;
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310 }
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311
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312 fseek(f, 0, SEEK_END);
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313 long fileSize = ftell(f);
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314 fseek(f, 0, SEEK_SET);
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315
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316 char source[fileSize];
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317 fread(source, fileSize, 1, f);
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318 fclose(f);
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diff changeset
319
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diff changeset
320 jsval serverRval;
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diff changeset
321 if (!JS_EvaluateScript(serverCx, serverGlobal, source,
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diff changeset
322 fileSize, SERVER_FILENAME, 1,
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diff changeset
323 &serverRval)) {
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diff changeset
324 JS_ReportError(cx, "Server failed.");
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diff changeset
325 return JS_FALSE;
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326 }
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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parents:
diff changeset
327
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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328 /* Cleanup. */
54
c451579bf83c Built out more of the /objects/ method.
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parents: 51
diff changeset
329 JS_DHashTableFinish(&tracingState.visited);
58
0b66a265df13 Fixed some bugs that raised assertions in debug builds of SpiderMonkey.
Atul Varma <varmaa@toolness.com>
parents: 57
diff changeset
330 JS_EndRequest(serverCx);
50
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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331 JS_DestroyContext(serverCx);
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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diff changeset
332 JS_DestroyRuntime(serverRuntime);
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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parents:
diff changeset
333
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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diff changeset
334 *rval = JSVAL_VOID;
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diff changeset
335 return JS_TRUE;
853f80bd3b4b Added tentative profileMemory() server, which suspends the current JS runtime, creates a new one and runs a web server in it.
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diff changeset
336 }