An efabless user was testing the synthesis flow with a tiny two-gate design, and graywolf appears to have issues with either the low gate count or more likely the low pin count, causing a segfault. Debugging with valgrind, it appears that variable z_S is not allocating enough memory for the array.
Line 949 in twsc/netgraph.c:
z_S[i] = (PINBOXPTR )Ysafe_malloc( maxpin_numberS sizeof(PINBOXPTR) ) ;
rubund
commented
6 years ago
An efabless user was testing the synthesis flow with a tiny two-gate design, and graywolf appears to have issues with either the low gate count or more likely the low pin count, causing a segfault. Debugging with valgrind, it appears that variable z_S is not allocating enough memory for the array.
Line 949 in twsc/netgraph.c: z_S[i] = (PINBOXPTR )Ysafe_malloc( maxpin_numberS sizeof(PINBOXPTR) ) ;
should be: z_S[i] = (PINBOXPTR )Ysafe_malloc( ( maxpin_numberS + 1 ) sizeof(PINBOXPTR) ) ;
The same change needs to be made to line 183.
---Tim