ISS-166 during postgres compile segmentation fault - Githubissues

stormalf / chibicc

A small C compiler from rui314

MIT License

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ISS-166 during postgres compile segmentation fault #59

Closed stormalf closed 4 months ago

stormalf commented 1 year ago

during postgres compile segmentation fault : chibicc -fno-strict-aliasing -fpic -I../../../../src/include -D_GNU_SOURCE -c -o pruneheap.o pruneheap.c Thread 2.1 "chibicc" received signal SIGSEGV, Segmentation fault.

It was caused by VLA type in sizeof function : ... typedef struct { int nredirected; / numbers of entries in arrays below / int ndead; int nunused; /*

marked[i] is true if item i is entered in one of the above arrays.
This needs to be MaxHeapTuplesPerPage + 1 long as FirstOffsetNumber is
1. Otherwise every access would need to subtract 1. */ ... bool marked[MaxHeapTuplesPerPage + 1]; ...

} PruneState; ... memset(prstate.marked, 0, sizeof(prstate.marked));