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// |jit-test| skip-if: !getJitCompilerOptions()['baseline.enable'] && !getJitCompilerOptions()['ion.enable']
// Test that JIT frames (both Baseline and Ion) report accurate line and column
// numbers when captured via the Gecko profiler. This verifies that the profiler
// correctly attributes stack samples to the source line where execution occurs.
setJitCompilerOption("baseline.warmup.trigger", 0);
setJitCompilerOption("ion.warmup.trigger", 10);
// Update these values if the line and column numbers of readGeckoProfilingStack
// call inside testLoop changes.
const EXPECTED_LINE = 22;
const EXPECTED_COLUMN = 17;
// Run enough iterations to ensure JIT compilation occurs.
const ITERATION_COUNT = 100;
const stacks = [];
function testLoop() {
const items = Array.from({ length: ITERATION_COUNT }, (_, i) => i);
for (const item of items) {
Math.abs(item);
stacks.push(readGeckoProfilingStack());
Math.cos(item);
}
}
enableGeckoProfiling();
testLoop();
disableGeckoProfiling();
assertEq(stacks.length, ITERATION_COUNT, "Should have captured the expected number of stacks");
let stacksWithCorrectFrame = 0;
let stacksWithIncorrectFrame = 0;
// Now let's check that the `testLoop` frame line/column numbers are attributed
// to the correct ones. We need to skip the baseline-interpreter frames because
// the line/column number collection of them happens in a different location.
for (const stack of stacks) {
for (const physicalFrame of stack) {
const testLoopFrame = physicalFrame.find(
frame =>
frame.label &&
frame.label.includes("testLoop") &&
frame.kind !== "baseline-interpreter"
);
if (testLoopFrame) {
if (
testLoopFrame.line === EXPECTED_LINE &&
testLoopFrame.column === EXPECTED_COLUMN
) {
stacksWithCorrectFrame++;
} else {
print(
`ERROR: testLoop line ${testLoopFrame.line} and column ${testLoopFrame.column} is outside expected line ${EXPECTED_LINE} and column ${EXPECTED_COLUMN} (kind: ${testLoopFrame.kind})`
);
stacksWithIncorrectFrame++;
}
}
}
}
print(`Total stacks captured: ${stacks.length}`);
print(`Stacks with correct testLoop frame: ${stacksWithCorrectFrame}`);
print(`Stacks with incorrect testLoop frame: ${stacksWithIncorrectFrame}`);
assertEq(stacksWithCorrectFrame > 0, true, "Should have captured some correct JIT frames");
assertEq(stacksWithIncorrectFrame, 0, "All JIT frames should have correct line numbers");