59 lines · c
1// RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.Malloc -verify %s2// expected-no-diagnostics3 4typedef struct {5 char I[4];6 int S;7} Hdr;8typedef struct {9 short w;10} Hdr2;11typedef struct {12 Hdr2 usedtobeundef;13} Info;14typedef struct {15 const unsigned char *ib;16 int cur;17 int end;18} IB;19unsigned long gl(IB *input);20inline void gbs(IB *input, unsigned char *buf, int count);21void getB(IB *st, Hdr2 *usedtobeundef);22inline unsigned char gb(IB *input) {23 if (input->cur + 1 > input->end)24 ;25 return input->ib[(input->cur)++];26}27static void getID(IB *st, char str[4]) {28 str[0] = gb(st);29 str[1] = gb(st);30 str[2] = gb(st);31 str[3] = gb(st);32}33static void getH(IB *st, Hdr *header) {34 getID (st, header->I);35 header->S = gl(st);36}37static void readILBM(IB *st, Info *pic) {38 // Initialize field;39 pic->usedtobeundef.w = 5;40 41 // Time out in the function so that we will be forced to retry with no inlining.42 Hdr header;43 getH (st, &header);44 getID(st, header.I);45 int i = 0;46 while (st->cur < st->end && i < 4) {47 i++;48 getH (st, &header);49 }50}51int bitmapImageRepFromIFF(IB st, const unsigned char *ib, int il) {52 Info pic;53 st.ib = ib;54 st.cur = 0;55 st.end = il;56 readILBM(&st,&pic);57 return pic.usedtobeundef.w; // No undefined value warning here.58}59