| 1 | /* Test assert(). |
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| 2 | * |
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| 3 | * This is hairier than you'd think, involving games with |
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| 4 | * stdio and signals. |
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| 5 | * |
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| 6 | */ |
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| 7 | |
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| 8 | #include <signal.h> |
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| 9 | #include <stdlib.h> |
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| 10 | #include <stdio.h> |
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| 11 | #include <string.h> |
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| 12 | #include <setjmp.h> |
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| 13 | |
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| 14 | #include <support/xstdio.h> |
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| 15 | |
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| 16 | jmp_buf rec; |
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| 17 | char buf[160]; |
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| 18 | |
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| 19 | static void |
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| 20 | sigabrt (int unused) |
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| 21 | { |
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| 22 | longjmp (rec, 1); /* recover control */ |
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| 23 | } |
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| 24 | |
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| 25 | #undef NDEBUG |
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| 26 | #include <assert.h> |
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| 27 | static void |
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| 28 | assert1 (void) |
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| 29 | { |
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| 30 | assert (1 == 2); |
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| 31 | } |
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| 32 | |
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| 33 | static void |
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| 34 | assert2 (void) |
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| 35 | { |
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| 36 | assert (1 == 1); |
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| 37 | } |
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| 38 | |
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| 39 | |
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| 40 | #define NDEBUG |
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| 41 | #include <assert.h> |
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| 42 | static void |
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| 43 | assert3 (void) |
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| 44 | { |
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| 45 | assert (2 == 3); |
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| 46 | } |
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| 47 | |
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| 48 | int |
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| 49 | main (void) |
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| 50 | { |
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| 51 | |
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| 52 | volatile int failed = 1; |
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| 53 | |
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| 54 | fclose (stderr); |
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| 55 | stderr = tmpfile (); |
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| 56 | if(!stderr) |
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| 57 | abort (); |
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| 58 | |
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| 59 | signal (SIGABRT, handler: sigabrt); |
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| 60 | |
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| 61 | if (!setjmp (rec)) |
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| 62 | assert1 (); |
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| 63 | else |
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| 64 | failed = 0; /* should happen */ |
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| 65 | |
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| 66 | if (!setjmp (rec)) |
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| 67 | assert2 (); |
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| 68 | else |
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| 69 | failed = 1; /* should not happen */ |
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| 70 | |
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| 71 | if (!setjmp (rec)) |
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| 72 | assert3 (); |
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| 73 | else |
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| 74 | failed = 1; /* should not happen */ |
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| 75 | |
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| 76 | rewind (stderr); |
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| 77 | xfgets (s: buf, size: 160, stderr); |
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| 78 | if (!strstr (buf, "1 == 2" )) |
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| 79 | failed = 1; |
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| 80 | |
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| 81 | xfgets (s: buf, size: 160, stderr); |
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| 82 | if (strstr (buf, "1 == 1" )) |
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| 83 | failed = 1; |
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| 84 | |
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| 85 | xfgets (s: buf, size: 160, stderr); |
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| 86 | if (strstr (buf, "2 == 3" )) |
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| 87 | failed = 1; |
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| 88 | |
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| 89 | return failed; |
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| 90 | } |
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| 91 | |
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