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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_takeCensus_02.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_takeCensus_02.js')
-rw-r--r-- | devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_takeCensus_02.js | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_takeCensus_02.js b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_takeCensus_02.js new file mode 100644 index 0000000000..a26e9a96d8 --- /dev/null +++ b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_takeCensus_02.js @@ -0,0 +1,61 @@ +/* Any copyright is dedicated to the Public Domain. + http://creativecommons.org/publicdomain/zero/1.0/ */ +"use strict"; + +// 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. + const dbg = new Debugger(); + const census0 = saveHeapSnapshotAndTakeCensus(dbg); + Census.walkCensus(census0, "census0", Census.assertAllZeros); + + function newGlobalWithDefs() { + const 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. + const 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, () => () => {});"); + + const 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(); +} |