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

// RUN: rm -rf %t
// RUN: mkdir -p %t
// RUN: cp "%s" "%t/ctu-on-demand-parsing.c"
// RUN: cp "%S/Inputs/ctu-other.c" "%t/ctu-other.c"
//
// Path substitutions on Windows platform could contain backslashes. These are escaped in the json file.
// compile_commands.json is only needed for extdef_mapping, not for the analysis itself.
// 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
//
// RUN: echo '"%t/ctu-other.c": ["gcc", "-std=c89", "-Wno-visibility", "ctu-other.c"]' | sed -e 's/\\/\\\\/g' > %t/invocations.yaml
//
// RUN: cd "%t" && %clang_extdef_map "%t/ctu-other.c" > externalDefMap.txt
//
// RUN: cd "%t" && %clang_cc1 -fsyntax-only -std=c89 -analyze \
// RUN:   -analyzer-checker=core,debug.ExprInspection \
// RUN:   -analyzer-config experimental-enable-naive-ctu-analysis=true \
// RUN:   -analyzer-config ctu-dir=. \
// RUN:   -analyzer-config ctu-invocation-list=invocations.yaml \
// RUN:   -verify ctu-on-demand-parsing.c
//
// FIXME: Path handling should work on all platforms.
// REQUIRES: system-linux

void clang_analyzer_eval(int);

// Test typedef and global variable in function.
typedef struct {
  int a;
  int b;
} FooBar;
extern FooBar fb;
int f(int);
void testGlobalVariable() {
  clang_analyzer_eval(f(5) == 1); // expected-warning{{TRUE}}
}

// Test enums.
int enumCheck(void);
enum A { x,
         y,
         z };
void testEnum() {
  clang_analyzer_eval(x == 0);            // expected-warning{{TRUE}}
  clang_analyzer_eval(enumCheck() == 42); // expected-warning{{TRUE}}
}

// Test that asm import does not fail.
int inlineAsm();
int testInlineAsm() { return inlineAsm(); }

// Test reporting error in a macro.
struct S;
int g(struct S *);
void testMacro(void) {
  g(0);
  // expected-warning@ctu-other.c:29 {{Access to field 'a' results in a dereference of a null pointer (loaded from variable 'ctx')}}
}

// The external function prototype is incomplete.
// warning:implicit functions are prohibited by c99
void testImplicit() {
  int res = identImplicit(6);    // external implicit functions are not inlined
  clang_analyzer_eval(res == 6); // expected-warning{{TRUE}}
  // Call something with uninitialized from the same function in which the
  // implicit was called. This is necessary to reproduce a special bug in
  // NoStoreFuncVisitor.
  int uninitialized;
  h(uninitialized); // expected-warning{{1st function call argument is an uninitialized value}}
}

// Tests the import of functions that have a struct parameter
// defined in its prototype.
struct DataType {
  int a;
  int b;
};
int structInProto(struct DataType *d);
void testStructDefInArgument() {
  struct DataType d;
  d.a = 1;
  d.b = 0;
  clang_analyzer_eval(structInProto(&d) == 0); // expected-warning{{TRUE}} expected-warning{{FALSE}}
}