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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /devtools/shared/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_02.js | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'devtools/shared/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_02.js')
-rw-r--r-- | devtools/shared/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_02.js | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_02.js b/devtools/shared/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_02.js new file mode 100644 index 000000000..680ac9b58 --- /dev/null +++ b/devtools/shared/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_02.js @@ -0,0 +1,57 @@ +/* Any copyright is dedicated to the Public Domain. + http://creativecommons.org/publicdomain/zero/1.0/ */ + +// HeapSnapshot.prototype.takeCensus behaves plausibly as we allocate objects. +// +// Exact object counts vary in ways we can't predict. For example, +// BaselineScripts can hold onto "template objects", which exist only to hold +// the shape and type for newly created objects. When BaselineScripts are +// discarded, these template objects go with them. +// +// So instead of expecting precise counts, we expect counts that are at least as +// many as we would expect given the object graph we've built. +// +// Ported from js/src/jit-tests/debug/Memory-takeCensus-02.js + +function run_test() { + // A Debugger with no debuggees had better not find anything. + var dbg = new Debugger; + var census0 = saveHeapSnapshotAndTakeCensus(dbg); + Census.walkCensus(census0, "census0", Census.assertAllZeros); + + function newGlobalWithDefs() { + var g = newGlobal(); + g.eval(` + function times(n, fn) { + var a=[]; + for (var i = 0; i<n; i++) + a.push(fn()); + return a; + } + `); + return g; + } + + // Allocate a large number of various types of objects, and check that census + // finds them. + var g = newGlobalWithDefs(); + dbg.addDebuggee(g); + + g.eval("var objs = times(100, () => ({}));"); + g.eval("var rxs = times(200, () => /foo/);"); + g.eval("var ars = times(400, () => []);"); + g.eval("var fns = times(800, () => () => {});"); + + var census1 = dbg.memory.takeCensus(dbg); + Census.walkCensus(census1, "census1", + Census.assertAllNotLessThan( + { "objects": + { "Object": { count: 100 }, + "RegExp": { count: 200 }, + "Array": { count: 400 }, + "Function": { count: 800 } + } + })); + + do_test_finished(); +} |