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-rw-r--r--tools/profiler/tests/xpcshell/test_enterjit_osr.js52
1 files changed, 52 insertions, 0 deletions
diff --git a/tools/profiler/tests/xpcshell/test_enterjit_osr.js b/tools/profiler/tests/xpcshell/test_enterjit_osr.js
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index 0000000000..86845ddc76
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+++ b/tools/profiler/tests/xpcshell/test_enterjit_osr.js
@@ -0,0 +1,52 @@
+// Check that the EnterJIT frame, added by the JIT trampoline and
+// usable by a native unwinder to resume unwinding after encountering
+// JIT code, is pushed as expected.
+function run_test() {
+ // This test assumes that it's starting on an empty profiler stack.
+ // (Note that the other profiler tests also assume the profiler
+ // isn't already started.)
+ Assert.ok(!Services.profiler.IsActive());
+
+ const ms = 5;
+ Services.profiler.StartProfiler(10000, ms, ["js"]);
+
+ function has_arbitrary_name_in_stack() {
+ // A frame for |arbitrary_name| has been pushed. Do a sequence of
+ // increasingly long spins until we get a sample.
+ var delayMS = 5;
+ while (1) {
+ info("loop: ms = " + delayMS);
+ const then = Date.now();
+ do {
+ let n = 10000;
+ // eslint-disable-next-line no-empty
+ while (--n) {} // OSR happens here
+ // Spin in the hope of getting a sample.
+ } while (Date.now() - then < delayMS);
+ let profile = Services.profiler.getProfileData().threads[0];
+
+ // Go through all of the stacks, and search for this function name.
+ for (const sample of profile.samples.data) {
+ const stack = getInflatedStackLocations(profile, sample);
+ info(`The following stack was found: ${stack}`);
+ for (var i = 0; i < stack.length; i++) {
+ if (stack[i].match(/arbitrary_name/)) {
+ // This JS sample was correctly found.
+ return true;
+ }
+ }
+ }
+
+ // Continue running this function with an increasingly long delay.
+ delayMS *= 2;
+ if (delayMS > 30000) {
+ return false;
+ }
+ }
+ }
+ Assert.ok(
+ has_arbitrary_name_in_stack(),
+ "A JS frame was found before the test timeout."
+ );
+ Services.profiler.StopProfiler();
+}