gcc/testsuite/c-c++-common/analyzer/setjmp-pr109094.c

   1 /* Reduced from an ICE seen in qemu's target/i386/tcg/translate.c  */
   2
   3 typedef long int __jmp_buf[8];
   4 struct __jmp_buf_tag {
   5   __jmp_buf __jmpbuf;
   6 };
   7 typedef struct __jmp_buf_tag sigjmp_buf[1];
   8
   9 extern int __sigsetjmp(sigjmp_buf env, int savesigs);
  10 extern void siglongjmp(sigjmp_buf env, int val);
  11
  12 typedef struct DisasContextBase {
  13   int num_insns;
  14 } DisasContextBase;
  15
  16 typedef struct DisasContext {
  17   DisasContextBase base;
  18   sigjmp_buf jmpbuf;
  19 } DisasContext;
  20
  21 extern int translator_ldub(DisasContextBase *base, int);
  22
  23 int advance_pc(DisasContext *s, int num_bytes) {
  24   if (s->base.num_insns > 1) {
  25     siglongjmp(s->jmpbuf, 2);
  26   }
  27   return 0;
  28 }
  29
  30 static inline int x86_ldub_code(DisasContext *s) {
  31   return translator_ldub(&s->base, advance_pc(s, 1));
  32 }
  33
  34 static void disas_insn(DisasContext *s) {
  35   int b;
  36   __sigsetjmp(s->jmpbuf, 0);
  37   b = x86_ldub_code(s);
  38 }