[PATCH] [compiler-rt] Add a symbolizer testcase for closed stdin/stdout
Kuba Brecka
kuba.brecka at gmail.com
Sat Feb 28 03:37:34 PST 2015
This testcase just tests that the external symbolizer (llvm-symbolizer) can start and communicate correctly even when the program closed its stdin, stdout and stderr.
http://reviews.llvm.org/D7973
Files:
test/asan/TestCases/closed-fds.cc
Index: test/asan/TestCases/closed-fds.cc
===================================================================
--- test/asan/TestCases/closed-fds.cc
+++ test/asan/TestCases/closed-fds.cc
@@ -0,0 +1,30 @@
+// Check that when the program closed its std(in|out|err), running the external
+// symbolizer still works.
+
+// RUN: rm -f %t.log.*
+// RUN: %clangxx_asan -O0 %s -o %t 2>&1 && ASAN_OPTIONS=log_path=%t.log:verbosity=2 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-OUTPUT
+// RUN: FileCheck %s --check-prefix=CHECK-FILE < %t.log.*
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+ fprintf(stderr, "Closing streams.\n");
+ close(STDIN_FILENO);
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+ fprintf(stderr, "Can you hear me now?\n");
+ char *x = (char*)malloc(10 * sizeof(char));
+ free(x);
+ x[argc] = 'X'; // BOOM
+ return 0;
+}
+
+// CHECK-OUTPUT: Closing streams.
+// CHECK-OUTPUT-NOT: Can you hear me now?
+// CHECK-FILE: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
+// CHECK-FILE: {{0x.* at pc 0x.* bp 0x.* sp 0x.*}}
+// CHECK-FILE: {{WRITE of size 1 at 0x.* thread T0}}
+// CHECK-FILE: {{ #0 0x.* in main .*closed-fds.cc:}}[[@LINE-9]]
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