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Issue 22852024: Track JS allocations as they arrive with no affection on performance when tracking is switched off (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Make separate API for JS allocations recording, add example of checking JS allocations recording in… Created 7 years, 3 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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1953 heap_profiler->TakeHeapSnapshot(v8_str("snapshot")); 1953 heap_profiler->TakeHeapSnapshot(v8_str("snapshot"));
1954 CHECK(ValidateSnapshot(snapshot)); 1954 CHECK(ValidateSnapshot(snapshot));
1955 const v8::HeapGraphNode* global = GetGlobalObject(snapshot); 1955 const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
1956 const v8::HeapGraphNode* foo_func = 1956 const v8::HeapGraphNode* foo_func =
1957 GetProperty(global, v8::HeapGraphEdge::kProperty, "foo"); 1957 GetProperty(global, v8::HeapGraphEdge::kProperty, "foo");
1958 CHECK_NE(NULL, foo_func); 1958 CHECK_NE(NULL, foo_func);
1959 const v8::HeapGraphNode* code = 1959 const v8::HeapGraphNode* code =
1960 GetProperty(foo_func, v8::HeapGraphEdge::kInternal, "code"); 1960 GetProperty(foo_func, v8::HeapGraphEdge::kInternal, "code");
1961 CHECK_NE(NULL, code); 1961 CHECK_NE(NULL, code);
1962 } 1962 }
1963
1964
1965 // This is an example of using checking of JS allocations tracking in a test.
1966 TEST_TRACK_ALLOCATIONS(HeapObjectsTracker) {
1967 v8::HandleScope scope;
1968 LocalContext env;
1969 CompileRun("var a = 1.2");
1970 CompileRun("var a = 1.2; var b = 1.0; var c = 1.0;");
1971 CompileRun(
1972 "var a = [];"
1973 "for (var i = 0; i < 5; ++i)"
1974 " a[i] = i;\n"
1975 "for (var i = 0; i < 3; ++i)"
1976 " a.shift();\n"
1977 );
1978 }
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