clang/test/Analysis/ctu-on-demand-parsing.c

   1 // RUN: rm -rf %t
   2 // RUN: mkdir -p %t
   3 // RUN: cp "%s" "%t/ctu-on-demand-parsing.c"
   4 // RUN: cp "%S/Inputs/ctu-other.c" "%t/ctu-other.c"
   5 //
   6 // Path substitutions on Windows platform could contain backslashes. These are escaped in the json file.
   7 // compile_commands.json is only needed for extdef_mapping, not for the analysis itself.
   8 // RUN: echo '[{"directory":"%t","command":"gcc -std=c89 -Wno-visibility ctu-other.c","file":"ctu-other.c"}]' | sed -e 's/\\/\\\\/g' > %t/compile_commands.json
   9 //
  10 // RUN: echo '"%t/ctu-other.c": ["gcc", "-std=c89", "-Wno-visibility", "ctu-other.c"]' | sed -e 's/\\/\\\\/g' > %t/invocations.yaml
  11 //
  12 // RUN: cd "%t" && %clang_extdef_map "%t/ctu-other.c" > externalDefMap.txt
  13 //
  14 // RUN: cd "%t" && %clang_cc1 -fsyntax-only -std=c89 -analyze \
  15 // RUN:   -analyzer-checker=core,debug.ExprInspection \
  16 // RUN:   -analyzer-config experimental-enable-naive-ctu-analysis=true \
  17 // RUN:   -analyzer-config ctu-dir=. \
  18 // RUN:   -analyzer-config ctu-invocation-list=invocations.yaml \
  19 // RUN:   -verify ctu-on-demand-parsing.c
  20 //
  21 // FIXME: Path handling should work on all platforms.
  22 // REQUIRES: system-linux
  23
  24 void clang_analyzer_eval(int);
  25
  26 // Test typedef and global variable in function.
  27 typedef struct {
  28   int a;
  29   int b;
  30 } FooBar;
  31 extern FooBar fb;
  32 int f(int);
  33 void testGlobalVariable() {
  34   clang_analyzer_eval(f(5) == 1); // expected-warning{{TRUE}}
  35 }
  36
  37 // Test enums.
  38 int enumCheck(void);
  39 enum A { x,
  40          y,
  41          z };
  42 void testEnum() {
  43   clang_analyzer_eval(x == 0);            // expected-warning{{TRUE}}
  44   clang_analyzer_eval(enumCheck() == 42); // expected-warning{{TRUE}}
  45 }
  46
  47 // Test that asm import does not fail.
  48 int inlineAsm();
  49 int testInlineAsm() { return inlineAsm(); }
  50
  51 // Test reporting error in a macro.
  52 struct S;
  53 int g(struct S *);
  54 void testMacro(void) {
  55   g(0);
  56   // expected-warning@ctu-other.c:29 {{Access to field 'a' results in a dereference of a null pointer (loaded from variable 'ctx')}}
  57 }
  58
  59 // The external function prototype is incomplete.
  60 // warning:implicit functions are prohibited by c99
  61 void testImplicit() {
  62   int res = identImplicit(6);    // external implicit functions are not inlined
  63   clang_analyzer_eval(res == 6); // expected-warning{{TRUE}}
  64   // Call something with uninitialized from the same function in which the
  65   // implicit was called. This is necessary to reproduce a special bug in
  66   // NoStoreFuncVisitor.
  67   int uninitialized;
  68   h(uninitialized); // expected-warning{{1st function call argument is an uninitialized value}}
  69 }
  70
  71 // Tests the import of functions that have a struct parameter
  72 // defined in its prototype.
  73 struct DataType {
  74   int a;
  75   int b;
  76 };
  77 int structInProto(struct DataType *d);
  78 void testStructDefInArgument() {
  79   struct DataType d;
  80   d.a = 1;
  81   d.b = 0;
  82   clang_analyzer_eval(structInProto(&d) == 0); // expected-warning{{TRUE}} expected-warning{{FALSE}}
  83 }