Add experimental chroot check which checks improper use of chroot(). Patch by

Lei Zhang.

llvm-svn: 116163

1 files changed, 24 insertions, 0 deletions

diff --git a/clang/test/Analysis/chroot.c b/clang/test/Analysis/chroot.c
new file mode 100644
index 00000000000..a0ee4504965
--- /dev/null
+++ b/clang/test/Analysis/chroot.c
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -analyze -analyzer-check-objc-mem -analyzer-experimental-checks -analyzer-store region -verify %s
+
+extern int chroot(const char* path);
+extern int chdir(const char* path);
+
+void foo(void) {
+}
+
+void f1(void) {
+  chroot("/usr/local"); // root changed.
+  foo(); // expected-warning {{No call of chdir("/") immediately after chroot}}
+}
+
+void f2(void) {
+  chroot("/usr/local"); // root changed.
+  chdir("/"); // enter the jail.
+  foo(); // no-warning
+}
+
+void f3(void) {
+  chroot("/usr/local"); // root changed.
+  chdir("../"); // change working directory, still out of jail.
+  foo(); // expected-warning {{No call of chdir("/") immediately after chroot}}
+}