SysprogsProfiler and FreeRTOS Causes SIGTRAP using vsnprintf

[bjornharinkParticipant]

Perhaps this is something avoidable, but using a VisualGDB example to print to UART using SysProfiler and FreeRTOS causes a SIGTRAP when using the vsnprintf function. It stops inside the xEventGroupWaitBits  function at uxReturn = uxTaskResetEventItemValue();.

Somehow I did not encounter this issue before. Anyone have a thought on this? Function used and called in start of a FreeRTOS task, it hangs on the vsnprintf:

C++

char * pmpGetValue(const char *cmd, ...) { char send_data[PMP_CMD_LEN]; memset(send_data, 0x00, PMP_CMD_LEN); va_list args; va_start(args, cmd); int cx = vsnprintf(send_data, PMP_CMD_LEN, cmd, args); va_end(args); if (cx < 0 | cx > PMP_CMD_LEN) { addConsoleBuffer("Buffer overflow."); } pmpSend(send_data); char *data = pmpReceive(); char *data_parse = pmpParse(data); return data_parse; }

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char * pmpGetValue(const char *cmd, ...) { char send_data[PMP_CMD_LEN]; memset(send_data, 0x00, PMP_CMD_LEN); va_list args; va_start(args, cmd); int cx = vsnprintf(send_data, PMP_CMD_LEN, cmd, args); va_end(args); if (cx < 0 | cx > PMP_CMD_LEN) { addConsoleBuffer("Buffer overflow."); } pmpSend(send_data); char *data = pmpReceive(); char *data_parse = pmpParse(data); return data_parse; }

• This topic was modified 2 years ago by  bjornharink.

[bjornharinkParticipant]

OKay. Apologies. This was an easy fix. The task stack was way too small to deal with a vsnprintf. Had it at 128 bytes and increased it to 512 bytes and resolved the issue.

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