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145
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1 /* Example of a bad call within a signal handler.
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2 'handler' calls 'custom_logger' which calls 'fprintf', and 'fprintf' is
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3 not allowed from a signal handler. */
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4
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5 #include <stdio.h>
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6 #include <signal.h>
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7
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8 extern void body_of_program(void);
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9
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10 void custom_logger(const char *msg)
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11 {
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12 fprintf(stderr, "LOG: %s", msg); /* { dg-warning "call to 'fprintf' from within signal handler" } */
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13 }
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14
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15 static void handler(int signum)
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16 {
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17 custom_logger("got signal");
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18 }
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19
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20 int main(int argc, const char *argv)
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21 {
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22 custom_logger("started");
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23
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24 signal(SIGINT, handler); /* { dg-message "registering 'handler' as signal handler" } */
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25
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26 body_of_program();
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27
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28 custom_logger("stopped");
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29
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30 return 0;
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31 }
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