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stlink: swo: use completely the available buffer 

The buffer passed to stlink_usb_trace_read() is allocated of size
*size and does not need to be zero-terminated. There is no reason
to not fill its last byte.

When checking the bytes available on swo, limit the retrieved byte
length to *size.

Change-Id: Iade0f8963118695931f13a8a3f1ab204911236b6
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reported-by: Adrian Negreanu <adrian.negreanu@nxp.com>
Reviewed-on: http://openocd.zylin.com/6061
Tested-by: jenkins
Reviewed-by: Adrian M Negreanu <adrian.negreanu@nxp.com>
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
This commit is contained in:
Antonio Borneo 2021-02-13 23:28:16 +01:00
parent a256943838
commit 8132b77d61
1 changed files with 1 additions and 1 deletions
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2
src/jtag/drivers/stlink_usb.c
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@ -1967,7 +1967,7 @@ static int stlink_usb_trace_read(void *handle, uint8_t *buf, size_t *size)
return res;
size_t bytes_avail = le_to_h_u16(h->databuf);
*size = bytes_avail < *size ? bytes_avail : *size - 1;
*size = bytes_avail < *size ? bytes_avail : *size;
if (*size > 0) {
res = stlink_usb_read_trace(handle, buf, *size);