The function esirisc_jtag_recv() can be called with argument
num_in_fields = 0, for example as consequence of calling
esirisc_jtag_continue().
In this case, num_in_bytes is zero and the allocation of the
variable-length array 'r' requires size zero.
src/target/esirisc_jtag.c:133:2: warning: Declared variable-length
array (VLA) has zero size [core.VLASize]
uint8_t r[num_in_bytes * 2];
^~~~~~~~~ ~~~~~~~~~~~~~~~~
Fix it by forcing size one when num_in_bytes is zero.
Change-Id: Id764c7b5ec4f5b3c18c7da650bbff39fc98ed049
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7301
Tested-by: jenkins
int num_in_bytes = DIV_ROUND_UP(num_in_bits, 8);
struct scan_field fields[3];
- uint8_t r[num_in_bytes * 2];
+ /* prevent zero-size variable length array */
+ int r_size = num_in_bytes ? num_in_bytes * 2 : 1;
+ uint8_t r[r_size];
esirisc_jtag_set_instr(jtag_info, INSTR_DEBUG);
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