[asan] add asan option log_path=PATH to let users redirect asan reports to a file PATH.PID instead of stderr

llvm-svn: 163872

1 files changed, 39 insertions, 0 deletions

diff --git a/compiler-rt/lib/asan/lit_tests/log-path_test.cc b/compiler-rt/lib/asan/lit_tests/log-path_test.cc
new file mode 100644
index 00000000000..1072670fbff
--- /dev/null
+++ b/compiler-rt/lib/asan/lit_tests/log-path_test.cc
@@ -0,0 +1,39 @@
+// RUN: %clangxx_asan  %s -o %t
+
+// Regular run.
+// RUN: not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-ERROR < %t.out
+
+// Good log_path.
+// RUN: rm -f %t.log.*
+// RUN: ASAN_OPTIONS=log_path=%t.log not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-ERROR < %t.log.*
+
+// Invalid log_path.
+// RUN: ASAN_OPTIONS=log_path=/INVALID not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-INVALID < %t.out
+
+// Too long log_path.
+// RUN: ASAN_OPTIONS=log_path=`for((i=0;i<10000;i++)); do echo -n $i; done` \
+// RUN:   not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-LONG < %t.out
+
+// Run w/o errors should not produce any log.
+// RUN: rm -f %t.log.*
+// RUN: ASAN_OPTIONS=log_path=%t.log  %t ARG ARG ARG
+// RUN: not cat %t.log.*
+
+
+#include <stdlib.h>
+#include <string.h>
+int main(int argc, char **argv) {
+  if (argc > 2) return 0;
+  char *x = (char*)malloc(10);
+  memset(x, 0, 10);
+  int res = x[argc * 10];  // BOOOM
+  free(x);
+  return res;
+}
+// CHECK-ERROR: ERROR: AddressSanitizer
+// CHECK-INVALID: ERROR: Can't open file: /INVALID
+// CHECK-LONG: ERROR: Path is too long: 01234