Merge branch 'master' of ssh://bitbucket.org/czan/honours

1 files changed, 85 insertions, 0 deletions

diff --git a/clang/test/Analysis/stream.c b/clang/test/Analysis/stream.c
new file mode 100644
index 0000000..e68835e
--- /dev/null
+++ b/clang/test/Analysis/stream.c
@@ -0,0 +1,85 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=experimental.unix.Stream -analyzer-store region -verify %s
+
+typedef __typeof__(sizeof(int)) size_t;
+typedef struct _IO_FILE FILE;
+#define SEEK_SET	0	/* Seek from beginning of file.  */
+#define SEEK_CUR	1	/* Seek from current position.  */
+#define SEEK_END	2	/* Seek from end of file.  */
+extern FILE *fopen(const char *path, const char *mode);
+extern FILE *tmpfile(void);
+extern int fclose(FILE *fp);
+extern size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
+extern int fseek (FILE *__stream, long int __off, int __whence);
+extern long int ftell (FILE *__stream);
+extern void rewind (FILE *__stream);
+
+void f1(void) {
+  FILE *p = fopen("foo", "r");
+  char buf[1024];
+  fread(buf, 1, 1, p); // expected-warning {{Stream pointer might be NULL.}}
+  fclose(p);
+}
+
+void f2(void) {
+  FILE *p = fopen("foo", "r");
+  fseek(p, 1, SEEK_SET); // expected-warning {{Stream pointer might be NULL.}}
+  fclose(p);
+}
+
+void f3(void) {
+  FILE *p = fopen("foo", "r");
+  ftell(p); // expected-warning {{Stream pointer might be NULL.}}
+  fclose(p);
+}
+
+void f4(void) {
+  FILE *p = fopen("foo", "r");
+  rewind(p); // expected-warning {{Stream pointer might be NULL.}}
+  fclose(p);
+}
+
+void f5(void) {
+  FILE *p = fopen("foo", "r");
+  if (!p)
+    return;
+  fseek(p, 1, SEEK_SET); // no-warning
+  fseek(p, 1, 3); // expected-warning {{The whence argument to fseek() should be SEEK_SET, SEEK_END, or SEEK_CUR.}}
+  fclose(p);
+}
+
+void f6(void) {
+  FILE *p = fopen("foo", "r");
+  fclose(p); 
+  fclose(p); // expected-warning {{Try to close a file Descriptor already closed. Cause undefined behaviour.}}
+}
+
+void f7(void) {
+  FILE *p = tmpfile();
+  ftell(p); // expected-warning {{Stream pointer might be NULL.}}
+  fclose(p);
+}
+
+void f8(int c) {
+  FILE *p = fopen("foo.c", "r");
+  if(c)
+    return; // expected-warning {{Opened File never closed. Potential Resource leak.}}
+  fclose(p);
+}
+
+FILE *f9(void) {
+  FILE *p = fopen("foo.c", "r");
+  if (p)
+    return p; // no-warning
+  else
+    return 0;
+}
+
+void pr7831(FILE *fp) {
+  fclose(fp); // no-warning
+}
+
+// PR 8081 - null pointer crash when 'whence' is not an integer constant
+void pr8081(FILE *stream, long offset, int whence) {
+  fseek(stream, offset, whence);
+}
+