vendor/clang/clang-release_39-r276489

1 files changed, 98 insertions, 0 deletions

diff --git a/test/Analysis/explain-svals.cpp b/test/Analysis/explain-svals.cpp
new file mode 100644
index 0000000000000..c0ed74914ed75
--- /dev/null
+++ b/test/Analysis/explain-svals.cpp
@@ -0,0 +1,98 @@
+// RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-checker=core.builtin,debug.ExprInspection,unix.cstring -verify %s
+
+typedef unsigned long size_t;
+
+struct S {
+  struct S3 {
+    int y[10];
+  };
+  struct S2 : S3 {
+    int *x;
+  } s2[10];
+  int z;
+};
+
+
+void clang_analyzer_explain(int);
+void clang_analyzer_explain(void *);
+void clang_analyzer_explain(S);
+
+size_t clang_analyzer_getExtent(void *);
+
+size_t strlen(const char *);
+
+int conjure();
+S conjure_S();
+
+int glob;
+static int stat_glob;
+void *glob_ptr;
+
+// Test strings are regex'ed because we need to match exact string
+// rather than a substring.
+
+void test_1(int param, void *ptr) {
+  clang_analyzer_explain(&glob); // expected-warning-re{{{{^pointer to global variable 'glob'$}}}}
+  clang_analyzer_explain(param); // expected-warning-re{{{{^argument 'param'$}}}}
+  clang_analyzer_explain(ptr); // expected-warning-re{{{{^argument 'ptr'$}}}}
+  if (param == 42)
+    clang_analyzer_explain(param); // expected-warning-re{{{{^signed 32-bit integer '42'$}}}}
+}
+
+void test_2(char *ptr, int ext) {
+  clang_analyzer_explain((void *) "asdf"); // expected-warning-re{{{{^pointer to element of type 'char' with index 0 of string literal "asdf"$}}}}
+  clang_analyzer_explain(strlen(ptr)); // expected-warning-re{{{{^metadata of type 'unsigned long' tied to pointee of argument 'ptr'$}}}}
+  clang_analyzer_explain(conjure()); // expected-warning-re{{{{^symbol of type 'int' conjured at statement 'conjure\(\)'$}}}}
+  clang_analyzer_explain(glob); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure\(\)'\) for global variable 'glob'$}}}}
+  clang_analyzer_explain(glob_ptr); // expected-warning-re{{{{^value derived from \(symbol of type 'int' conjured at statement 'conjure\(\)'\) for global variable 'glob_ptr'$}}}}
+  clang_analyzer_explain(clang_analyzer_getExtent(ptr)); // expected-warning-re{{{{^extent of pointee of argument 'ptr'$}}}}
+  int *x = new int[ext];
+  clang_analyzer_explain(x); // expected-warning-re{{{{^pointer to element of type 'int' with index 0 of pointee of symbol of type 'int \*' conjured at statement 'new int \[ext\]'$}}}}
+  // Sic! What gets computed is the extent of the element-region.
+  clang_analyzer_explain(clang_analyzer_getExtent(x)); // expected-warning-re{{{{^signed 32-bit integer '4'$}}}}
+  delete[] x;
+}
+
+void test_3(S s) {
+  clang_analyzer_explain(&s); // expected-warning-re{{{{^pointer to parameter 's'$}}}}
+  clang_analyzer_explain(s.z); // expected-warning-re{{{{^initial value of field 'z' of parameter 's'$}}}}
+  clang_analyzer_explain(&s.s2[5].y[3]); // expected-warning-re{{{{^pointer to element of type 'int' with index 3 of field 'y' of base object 'S::S3' inside element of type 'struct S::S2' with index 5 of field 's2' of parameter 's'$}}}}
+  if (!s.s2[7].x) {
+    clang_analyzer_explain(s.s2[7].x); // expected-warning-re{{{{^concrete memory address '0'$}}}}
+    // FIXME: we need to be explaining '1' rather than '0' here; not explainer bug.
+    clang_analyzer_explain(s.s2[7].x + 1); // expected-warning-re{{{{^concrete memory address '0'$}}}}
+  }
+}
+
+void test_4(int x, int y) {
+  int z;
+  static int stat;
+  clang_analyzer_explain(x + 1); // expected-warning-re{{{{^\(argument 'x'\) \+ 1$}}}}
+  clang_analyzer_explain(1 + y); // expected-warning-re{{{{^\(argument 'y'\) \+ 1$}}}}
+  clang_analyzer_explain(x + y); // expected-warning-re{{{{^unknown value$}}}}
+  clang_analyzer_explain(z); // expected-warning-re{{{{^undefined value$}}}}
+  clang_analyzer_explain(&z); // expected-warning-re{{{{^pointer to local variable 'z'$}}}}
+  clang_analyzer_explain(stat); // expected-warning-re{{{{^signed 32-bit integer '0'$}}}}
+  clang_analyzer_explain(&stat); // expected-warning-re{{{{^pointer to static local variable 'stat'$}}}}
+  clang_analyzer_explain(stat_glob); // expected-warning-re{{{{^initial value of global variable 'stat_glob'$}}}}
+  clang_analyzer_explain(&stat_glob); // expected-warning-re{{{{^pointer to global variable 'stat_glob'$}}}}
+  clang_analyzer_explain((int[]){1, 2, 3}); // expected-warning-re{{{{^pointer to element of type 'int' with index 0 of compound literal \(int \[3\]\)\{1, 2, 3\}$}}}}
+}
+
+namespace {
+class C {
+  int x[10];
+
+public:
+  void test_5(int i) {
+    clang_analyzer_explain(this); // expected-warning-re{{{{^pointer to 'this' object$}}}}
+    clang_analyzer_explain(&x[i]); // expected-warning-re{{{{^pointer to element of type 'int' with index 'argument 'i'' of field 'x' of 'this' object$}}}}
+    clang_analyzer_explain(__builtin_alloca(i)); // expected-warning-re{{{{^pointer to region allocated by '__builtin_alloca\(i\)'$}}}}
+  }
+};
+} // end of anonymous namespace
+
+void test_6() {
+  clang_analyzer_explain(conjure_S()); // expected-warning-re{{{{^lazily frozen compound value of temporary object constructed at statement 'conjure_S\(\)'$}}}}
+  clang_analyzer_explain(conjure_S().z); // expected-warning-re{{{{^value derived from \(symbol of type 'struct S' conjured at statement 'conjure_S\(\)'\) for field 'z' of temporary object constructed at statement 'conjure_S\(\)'$}}}}
+}