printf crashes after reset when built/flashed with fast semihosting enabled

[borbmizzet]

I’ve noticed that when I build with fast semihosting enabled, using –specs=rdimon.specs and –specs=nosys.specs, after I reset either via hard powercycle or the “Reset Device” button in the GDB Session window, calls to printf essentially crash the program in FastSemihosting.cpp::WriteRawFastSemihostingData(line 65) as it goes into an infintite loop:
while ((s_FastSemihostingState.WriteOffset – s_FastSemihostingState.ReadOffset) > (FAST_SEMIHOSTING_BUFFER_SIZE – minRequiredSize))
{
#if FAST_SEMIHOSTING_BLOCKING_MODE
continue;
#else
return 0;
#endif
}

s_FastSemihostingState.WriteOffset is 0, and s_FastSemihostingState.ReadOffset is some big number.

[borbmizzet]

I just switched the semihosting settings to discard further data when the buffer is full. So that probably fixed it. Still something to think about though.

[support]

Hi,

Thanks, we will investigate and fix it in the upcoming v5.3.

[Author]

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