Smartphone Flash — Tool -runtime Trace Mode-l !full!

| Scenario | Logcat | Dmesg | JTAG Debugger | SP Flash Tool Trace Mode | |----------|--------|-------|---------------|--------------------------| | Kernel panic before init | ❌ No | ❌ Not logged | ✅ Yes | ✅ Yes | | Bootloop in Preloader | ❌ No | ❌ No | ✅ Yes | ✅ Yes | | Real-time power transition analysis | ❌ No | ❌ Too coarse | ✅ Yes | ✅ Yes | | Non-invasive tracing (no breakpoints) | ✅ Yes | ✅ Yes | ❌ Affects timing | ✅ Yes | | Tracing across CPU idle/suspend | ❌ No | ❌ Stops | ❌ Stops | ✅ Yes | | End-user device | ❌ Too slow | ❌ Too slow | ✅ Requires hardware | ✅ Requires engineering boot |

| Command | Effect | | :--- | :--- | | -runtime Trace Mode -l 5 -s COM5 | Traces only over physical COM port 5 (bypasses USB stack issues). | | -runtime Trace Mode -l 5 -b 921600 | Sets baud rate for trace to 921600 (faster logging for large RAM dumps). | | -runtime Trace Mode -l 5 -o C:\traces\debug.log | Outputs the runtime trace directly to a persistent log file. | Smartphone Flash Tool -runtime Trace Mode-l