[sanitizer_common] Rewrite more Posix tests to use asserts

Rewrite the tests for Posix functions that silently 'return 1'
or 'exit(1)' on error, to instead verbosely report the error using
assert.  This is based on requests made in review of D56136.

Differential Revision: https://reviews.llvm.org/D56149

llvm-svn: 350227

Author: mgorny

compiler-rt/test/sanitizer_common/TestCases/Posix/devname.cc

@@ -1,6 +1,7 @@
 // RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck %s
 // UNSUPPORTED: linux, solaris
 
+#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/stat.h>
@@ -9,11 +10,8 @@ int main(void) {
   struct stat st;
   char *name;
 
-  if (stat("/dev/null", &st))
-    exit(1);
-
-  if (!(name = devname(st.st_rdev, S_ISCHR(st.st_mode) ? S_IFCHR : S_IFBLK)))
-    exit(1);
+  assert(!stat("/dev/null", &st));
+  assert((name = devname(st.st_rdev, S_ISCHR(st.st_mode) ? S_IFCHR : S_IFBLK)));
 
   printf("%s\n", name);
 

compiler-rt/test/sanitizer_common/TestCases/Posix/devname_r.cc

@@ -4,6 +4,7 @@
 #include <sys/cdefs.h>
 #include <sys/stat.h>
 
+#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -12,17 +13,14 @@ int main(void) {
   char name[100];
   mode_t type;
 
-  if (stat("/dev/null", &st))
-    exit(1);
+  assert(!stat("/dev/null", &st));
 
   type = S_ISCHR(st.st_mode) ? S_IFCHR : S_IFBLK;
 
 #if defined(__NetBSD__)
-  if (devname_r(st.st_rdev, type, name, sizeof(name)))
-    exit(1);
+  assert(!devname_r(st.st_rdev, type, name, sizeof(name)));
 #else
-  if (!devname_r(st.st_rdev, type, name, sizeof(name)))
-    exit(1);
+  assert(devname_r(st.st_rdev, type, name, sizeof(name)));
 #endif
 
   printf("%s\n", name);

compiler-rt/test/sanitizer_common/TestCases/Posix/fgetln.cc

@@ -1,24 +1,20 @@
 // RUN: %clangxx -O0 -g %s -o %t && %run %t
 // UNSUPPORTED: linux
 
+#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 int main(void) {
-  FILE *fp;
-  size_t len;
-  char *s;
-
-  fp = fopen("/etc/hosts", "r");
-  if (!fp)
-    exit(1);
+  FILE *fp = fopen("/etc/hosts", "r");
+  assert(fp);
 
-  s = fgetln(fp, &len);
+  size_t len;
+  char *s = fgetln(fp, &len);
 
   printf("%.*s\n", (int)len, s);
 
-  if (fclose(fp) == EOF)
-    exit(1);
+  assert(!fclose(fp));
 
   return 0;
 }

compiler-rt/test/sanitizer_common/TestCases/Posix/fgets.cc

@@ -1,20 +1,16 @@
 // RUN: %clangxx -g %s -o %t && %run %t
 
+#include <assert.h>
 #include <stdio.h>
 
 int main(int argc, char **argv) {
-  FILE *fp;
-  char buf[2];
-  char *s;
-
-  fp = fopen(argv[0], "r");
-  if (!fp)
-    return 1;
+  FILE *fp = fopen(argv[0], "r");
+  assert(fp);
 
-  s = fgets(buf, sizeof(buf), fp);
-  if (!s)
-    return 2;
+  char buf[2];
+  char *s = fgets(buf, sizeof(buf), fp);
+  assert(s);
 
-  fclose(fp);
+  assert(!fclose(fp));
   return 0;
 }

compiler-rt/test/sanitizer_common/TestCases/Posix/fputs_puts.cc

@@ -1,18 +1,12 @@
 // RUN: %clangxx -g %s -o %t && %run %t | FileCheck %s
 // CHECK: {{^foobar$}}
 
+#include <assert.h>
 #include <stdio.h>
 
 int main(void) {
-  int r;
-
-  r = fputs("foo", stdout);
-  if (r < 0)
-    return 1;
-
-  r = puts("bar");
-  if (r < 0)
-    return 1;
+  assert(fputs("foo", stdout) >= 0);
+  assert(puts("bar") >= 0);
 
   return 0;
 }

compiler-rt/test/sanitizer_common/TestCases/Posix/lstat.cc

@@ -1,16 +1,14 @@
 // RUN: %clangxx -O0 -g %s -o %t && %run %t
 
+#include <assert.h>
 #include <stdlib.h>
 #include <sys/stat.h>
 
 int main(void) {
   struct stat st;
 
-  if (lstat("/dev/null", &st))
-    exit(1);
-
-  if (!S_ISCHR(st.st_mode))
-    exit(1);
+  assert(!lstat("/dev/null", &st));
+  assert(S_ISCHR(st.st_mode));
 
   return 0;
 }