1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/profiler/pc-count-profiler.js b/js/src/jit-test/tests/profiler/pc-count-profiler.js
new file mode 100644
index 0000000000..235055af3b
--- /dev/null
+++ b/js/src/jit-test/tests/profiler/pc-count-profiler.js
@@ -0,0 +1,53 @@
+// Smoke test for the PC count profiler. 
+
+function f(x) {
+    if (x < 10)
+        return 0;
+    if (x < 50)
+        return 1;
+    return 2;
+}
+
+L: try {
+    // Profile the test function "f".
+    pccount.start();
+    for (var i = 0; i < 100; ++i) f(i);
+    pccount.stop();
+
+    // Count the profiled scripts, stop if no scripts were profiled.
+    var n = pccount.count();
+    if (n === 0)
+        break L;
+
+    // Find the script index for "f".
+    var scriptIndex = -1;
+    for (var i = 0; i < n; ++i) {
+        var summary = JSON.parse(pccount.summary(i));
+        if (summary.name === "f")
+            scriptIndex = i;
+    }
+
+    // Stop if the script index for "f" wasn't found.
+    if (scriptIndex < 0)
+        break L;
+
+    // Retrieve the profiler data for "f".
+    var contents = pccount.contents(scriptIndex);
+    assertEq(typeof contents, "string");
+
+    // The profiler data should be parsable as JSON text.
+    var contents = JSON.parse(contents, (name, value) => {
+        // Split the Ion code segments into multiple entries.
+        if (name === "code")
+            return value.split("\n");
+
+        return value;
+    });
+
+    // Pretty print the profiler data.
+    var pretty = JSON.stringify(contents, null, 1);
+    print(pretty);
+} finally {
+    // Clean-up.
+    pccount.purge();
+}