reference, declaration → definition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced

    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74

// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=core,osx -analyzer-output=text -verify %s

#include "../Inputs/system-header-simulator.h"
#include "../Inputs/system-header-simulator-cxx.h"

void testUnsignedIntMacro(unsigned int i) {
  if (i == UINT32_MAX) { // expected-note {{Assuming 'i' is equal to UINT32_MAX}}
                         // expected-note@-1 {{Taking true branch}}
    char *p = NULL; // expected-note {{'p' initialized to a null pointer value}}
    *p = 7;  // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
             // expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
  }
}


// FIXME: 'i' can never be equal to UINT32_MAX - it doesn't even fit into its
// type ('int'). This should say "Assuming 'i' is equal to -1".
void testIntMacro(int i) {
  if (i == UINT32_MAX) { // expected-note {{Assuming 'i' is equal to UINT32_MAX}}
                         // expected-note@-1 {{Taking true branch}}
    char *p = NULL; // expected-note {{'p' initialized to a null pointer value}}
    *p = 7;  // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
             // expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
  }
}



void testNULLMacro(int *p) {
  if (p == NULL) { // expected-note {{Assuming 'p' is equal to NULL}}
                   // expected-note@-1 {{Taking true branch}}
    *p = 7;  // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
             // expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
  }
}

void testnullptrMacro(int *p) {
  if (p == nullptr) { // expected-note {{Assuming pointer value is null}}
                      // expected-note@-1 {{Taking true branch}}
    *p = 7;  // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
             // expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
  }
}

// There are no path notes on the comparison to float types.
void testDoubleMacro(double d) {
  if (d == DBL_MAX) { // expected-note {{Assuming 'd' is equal to DBL_MAX}}
                      // expected-note@-1 {{Taking true branch}}

    char *p = NULL; // expected-note {{'p' initialized to a null pointer value}}
    *p = 7;         // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
                    // expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
  }
}

void testboolMacro(bool b, int *p) {
  p = nullptr;      // expected-note {{Null pointer value stored to 'p'}}
  if (b == false) { // expected-note {{Assuming the condition is true}}
                    // expected-note@-1 {{Taking true branch}}
    *p = 7;         // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
                    // expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
  }
}

#define nested_null_split(x) if ((x) != UINT32_MAX) {}

void testNestedNullSplitMacro(int i, int *p) {
  nested_null_split(i); // expected-note {{Assuming 'i' is equal to -1}}
                        // expected-note@-1 {{Taking false branch}}
  if (!p) // expected-note {{Assuming 'p' is null}}
          // expected-note@-1 {{Taking true branch}}
    *p = 1; // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
            // expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
}