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Postmortem Debugging to serial port (#20492)

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This commit is contained in:
X-Ryl669
2021-02-21 03:22:20 +01:00
committed by GitHub
parent fb8b421aac
commit 8d28853774
34 changed files with 1286 additions and 740 deletions
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21
Marlin/src/gcode/gcode_d.cpp
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@ -152,8 +152,7 @@
NOMORE(len, FLASH_SIZE - addr);
if (parser.seenval('X')) {
// TODO: Write the hex bytes after the X
//while (len--) {
//}
//while (len--) {}
}
else {
// while (len--) {
@ -180,7 +179,25 @@
for (int i = 10000; i--;) DELAY_US(1000UL);
ENABLE_ISRS();
SERIAL_ECHOLNPGM("FAILURE: Watchdog did not trigger board reset.");
} break;
#if ENABLED(POSTMORTEM_DEBUGGING)
case 451: { // Trigger all kind of faults to test exception catcher
SERIAL_ECHOLNPGM("Disabling heaters");
thermalManager.disable_all_heaters();
delay(1000); // Allow time to print
volatile uint8_t type[5] = { parser.byteval('T', 1) };
// The code below is obviously wrong and it's full of quirks to fool the compiler from optimizing away the code
switch (type[0]) {
case 1: default: *(int*)0 = 451; break; // Write at bad address
case 2: { volatile int a = 0; volatile int b = 452 / a; *(int*)&a = b; } break; // Divide by zero (some CPUs accept this, like ARM)
case 3: { *(uint32_t*)&type[1] = 453; volatile int a = *(int*)&type[1]; type[0] = a / 255; } break; // Unaligned access (some CPUs accept this)
case 4: { volatile void (*func)() = (volatile void (*)()) 0xE0000000; func(); } break; // Invalid instruction
}
break;
}
#endif
}
}