1 files changed, 44 insertions, 0 deletions
diff --git a/test/Analysis/mmap-writeexec.c b/test/Analysis/mmap-writeexec.c
new file mode 100644
index 0000000000000..2ebc961103425
--- /dev/null
+++ b/test/Analysis/mmap-writeexec.c
@@ -0,0 +1,44 @@
+// RUN: %clang_analyze_cc1 -triple i686-unknown-linux -analyzer-checker=alpha.security.MmapWriteExec -analyzer-config alpha.security.MmapWriteExec:MmapProtExec=1 -analyzer-config alpha.security.MmapWriteExec:MmapProtRead=4 -DUSE_ALTERNATIVE_PROT_EXEC_DEFINITION -verify %s
+// RUN: %clang_analyze_cc1 -triple x86_64-unknown-apple-darwin10 -analyzer-checker=alpha.security.MmapWriteExec -verify %s
+
+#define PROT_WRITE  0x02
+#ifndef USE_ALTERNATIVE_PROT_EXEC_DEFINITION
+#define PROT_EXEC   0x04
+#define PROT_READ   0x01
+#else
+#define PROT_EXEC   0x01
+#define PROT_READ   0x04
+#endif
+#define MAP_PRIVATE 0x0002
+#define MAP_ANON    0x1000
+#define MAP_FIXED   0x0010
+#define NULL        ((void *)0)
+
+typedef __typeof(sizeof(int)) size_t;
+void *mmap(void *, size_t, int, int, int, long);
+int mprotect(void *, size_t, int);
+
+void f1()
+{
+  void *a = mmap(NULL, 16, PROT_READ | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0); // no-warning
+  void *b = mmap(a, 16, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED | MAP_ANON, -1, 0); // no-warning
+  void *c = mmap(NULL, 32, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0); // expected-warning{{Both PROT_WRITE and PROT_EXEC flags are set. This can lead to exploitable memory regions, which could be overwritten with malicious code}}
+  (void)a;
+  (void)b;
+  (void)c;
+}
+
+void f2()
+{
+  void *(*callm)(void *, size_t, int, int, int, long);
+  callm = mmap;
+  int prot = PROT_WRITE | PROT_EXEC;
+  (void)callm(NULL, 1024, prot, MAP_PRIVATE | MAP_ANON, -1, 0); // expected-warning{{Both PROT_WRITE and PROT_EXEC flags are set. This can lead to exploitable memory regions, which could be overwritten with malicious code}}
+}
+
+void f3()
+{
+  void *p = mmap(NULL, 1024, PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); // no-warning
+  int m = mprotect(p, 1024, PROT_WRITE | PROT_EXEC); // expected-warning{{Both PROT_WRITE and PROT_EXEC flags are set. This can lead to exploitable memory regions, which could be overwritten with malicious code}}
+  (void)m;
+}