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:   -analyzer-config ctu-phase1-inlining=all \
  20 // RUN:   -verify ctu-on-demand-parsing.c
  21 //
  22 // FIXME: On-demand ctu should be tested in the same file that we have for the
  23 // PCH version, but with a different verify prefix (e.g. -verfiy=on-demand-ctu)
  24 //
  25 // FIXME: Path handling should work on all platforms.
  26 // REQUIRES: system-linux
  27
  28 void clang_analyzer_eval(int);
  29
  30 // Test typedef and global variable in function.
  31 typedef struct {
  32   int a;
  33   int b;
  34 } FooBar;
  35 extern FooBar fb;
  36 int f(int);
  37 void testGlobalVariable() {
  38   clang_analyzer_eval(f(5) == 1); // expected-warning{{TRUE}}
  39 }
  40
  41 // Test enums.
  42 int enumCheck(void);
  43 enum A { x,
  44          y,
  45          z };
  46 void testEnum() {
  47   clang_analyzer_eval(x == 0);            // expected-warning{{TRUE}}
  48   clang_analyzer_eval(enumCheck() == 42); // expected-warning{{TRUE}}
  49 }
  50
  51 // Test that asm import does not fail.
  52 int inlineAsm();
  53 int testInlineAsm() { return inlineAsm(); }
  54
  55 // Test reporting error in a macro.
  56 struct S;
  57 int g(struct S *);
  58 void testMacro(void) {
  59   g(0);
  60   // expected-warning@ctu-other.c:29 {{Access to field 'a' results in a dereference of a null pointer (loaded from variable 'ctx')}}
  61 }
  62
  63 // The external function prototype is incomplete.
  64 // warning:implicit functions are prohibited by c99
  65 void testImplicit() {
  66   int res = identImplicit(6);    // external implicit functions are not inlined
  67   clang_analyzer_eval(res == 6); // expected-warning{{TRUE}}
  68   // Call something with uninitialized from the same function in which the
  69   // implicit was called. This is necessary to reproduce a special bug in
  70   // NoStoreFuncVisitor.
  71   int uninitialized;
  72   h(uninitialized); // expected-warning{{1st function call argument is an uninitialized value}}
  73 }
  74
  75 // Tests the import of functions that have a struct parameter
  76 // defined in its prototype.
  77 struct DataType {
  78   int a;
  79   int b;
  80 };
  81 int structInProto(struct DataType *d);
  82 void testStructDefInArgument() {
  83   struct DataType d;
  84   d.a = 1;
  85   d.b = 0;
  86   clang_analyzer_eval(structInProto(&d) == 0); // expected-warning{{TRUE}} expected-warning{{FALSE}}
  87 }