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35 lines
1.0 KiB
C
35 lines
1.0 KiB
C
/* Test resolvable and unresolvable calls through function pointers:
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* -- both should be retained in function graphs until resolved or until main
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* -- former should get resolved in or before main() and never appear in GG
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* -- latter should remain unresolved in main() and copied to GG
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* -- globals in GG pointed to by latter should be marked I, but not other nodes
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*/
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#include <stdlib.h>
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extern void exit_dummy(int*);
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static int X, M, Z;
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void makeCalls(void(*GpKnown)(int*), void(*GpUnknown)(int*))
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{
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if (Z == 0) GpUnknown(&X); /* pass to exit_dummy: never resolved */
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else GpKnown(&M); /* pass to knownF: resolved in main*/
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++Z;
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printf("&Z = %p\n", &Z); /* "known external": resolved here */
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}
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void knownF(int* Y)
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{
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if (Y == 0) knownF(Y); /* direct call to self: resolved here */
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}
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int main(int argc, char** argv)
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{
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void(*GpKnown)(int*) = knownF;
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void(*GpUnknown)(int*) = exit_dummy;
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Z = argc;
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makeCalls(GpKnown, GpUnknown);
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return 0;
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}
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