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      1 //
      2 //                     The LLVM Compiler Infrastructure
      3 //
      4 // This file is distributed under the University of Illinois Open Source
      5 // License. See LICENSE.TXT for details.
      6 
      7 /*
      8  *  fail.c
      9  *  testObjects
     10  *
     11  *  Created by Blaine Garst on 9/16/08.
     12  *
     13  */
     14 #include <stdio.h>
     15 #include <unistd.h>
     16 #include <fcntl.h>
     17 #include <string.h>
     18 #include <stdlib.h>
     19 #include <stdbool.h>
     20 
     21 
     22 bool readfile(char *buffer, const char *from) {
     23     int fd = open(from, 0);
     24     if (fd < 0) return false;
     25     int count = read(fd, buffer, 512);
     26     if (count < 0) return false;
     27     buffer[count] = 0; // zap newline
     28     return true;
     29 }
     30 
     31 // basic idea, take compiler args, run compiler, and verify that expected failure matches any existing one
     32 
     33 int main(int argc, char *argv[]) {
     34     if (argc == 1) return 0;
     35     char *copy[argc+1];   // make a copy
     36     // find and strip off -e "errorfile"
     37     char *errorfile = NULL;
     38     int counter = 0, i = 0;
     39     for (i = 1; i < argc; ++i) {    // skip 0 arg which is "fail"
     40         if (!strncmp(argv[i], "-e", 2)) {
     41             errorfile = argv[++i];
     42         }
     43         else {
     44             copy[counter++] = argv[i];
     45         }
     46     }
     47     copy[counter] = NULL;
     48     pid_t child = fork();
     49     char buffer[512];
     50     if (child == 0) {
     51         // in child
     52         sprintf(buffer, "/tmp/errorfile_%d", getpid());
     53         close(1);
     54         int fd = creat(buffer, 0777);
     55         if (fd != 1) {
     56             fprintf(stderr, "didn't open custom error file %s as 1, got %d\n", buffer, fd);
     57             exit(1);
     58         }
     59         close(2);
     60         dup(1);
     61         int result = execv(copy[0], copy);
     62         exit(10);
     63     }
     64     if (child < 0) {
     65         printf("fork failed\n");
     66         exit(1);
     67     }
     68     int status = 0;
     69     pid_t deadchild = wait(&status);
     70     if (deadchild != child) {
     71         printf("wait got %d instead of %d\n", deadchild, child);
     72         exit(1);
     73     }
     74     if (WEXITSTATUS(status) == 0) {
     75         printf("compiler exited normally, not good under these circumstances\n");
     76         exit(1);
     77     }
     78     //printf("exit status of child %d was %d\n", child, WEXITSTATUS(status));
     79     sprintf(buffer, "/tmp/errorfile_%d", child);
     80     if (errorfile) {
     81         //printf("ignoring error file: %s\n", errorfile);
     82         char desired[512];
     83         char got[512];
     84         bool gotErrorFile = readfile(desired, errorfile);
     85         bool gotOutput = readfile(got, buffer);
     86         if (!gotErrorFile && gotOutput) {
     87             printf("didn't read errorfile %s, it should have something from\n*****\n%s\n*****\nin it.\n",
     88                 errorfile, got);
     89             exit(1);
     90         }
     91         else if (gotErrorFile && gotOutput) {
     92             char *where = strstr(got, desired);
     93             if (!where) {
     94                 printf("didn't find contents of %s in %s\n", errorfile, buffer);
     95                 exit(1);
     96             }
     97         }
     98         else {
     99             printf("errorfile %s and output %s inconsistent\n", errorfile, buffer);
    100             exit(1);
    101         }
    102     }
    103     unlink(buffer);
    104     printf("success\n");
    105     exit(0);
    106 }
    107 
    108