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Added value-initialization tests to possibly reproduce http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916.

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[SVN r61195]
This commit is contained in:
Niels Dekker
2010-04-11 10:00:44 +00:00
parent d35bde21e8
commit bb8216ed39
1 changed files with 68 additions and 1 deletions
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69
test/boost_no_com_value_init.ipp
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@ -101,6 +101,47 @@ namespace boost_no_complete_value_initialization
return arg.data == 0;
}
struct char_array_struct
{
char data[42];
};
bool is_value_initialized(const char_array_struct& arg)
{
for ( unsigned i = 0; i < sizeof(arg.data); ++i)
{
if ( arg.data[i] != 0 )
{
return false;
}
}
return true;
}
// Equivalent to the Stats class from GCC Bug 33916,
// "Default constructor fails to initialize array members", reported by
// Michael Elizabeth Chastain: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916
class int_array_pair
{
friend bool is_value_initialized(const int_array_pair& arg);
private:
int first[12];
int second[12];
};
bool is_value_initialized(const int_array_pair& arg)
{
for ( unsigned i = 0; i < 12; ++i)
{
if ( (arg.first[i] != 0) || (arg.second[i] != 0) )
{
return false;
}
}
return true;
}
union pod_struct_and_int_union
{
pod_struct first;
@ -297,6 +338,10 @@ namespace boost_no_complete_value_initialization
derived_struct m_derived_struct_array[2];
derived_int_struct m_derived_int_struct;
derived_int_struct m_derived_int_struct_array[2];
char_array_struct m_char_array_struct;
char_array_struct m_char_array_struct_array[2];
int_array_pair m_int_array_pair;
int_array_pair m_int_array_pair_array[2];
enum_holder_and_int m_enum_holder_and_int;
enum_holder_and_int m_enum_holder_and_int_array[2];
private_and_protected_int m_private_and_protected_int;
@ -349,6 +394,10 @@ namespace boost_no_complete_value_initialization
m_derived_struct_array(),
m_derived_int_struct(),
m_derived_int_struct_array(),
m_char_array_struct(),
m_char_array_struct_array(),
m_int_array_pair(),
m_int_array_pair_array(),
m_enum_holder_and_int(),
m_enum_holder_and_int_array(),
m_private_and_protected_int(),
@ -421,6 +470,12 @@ namespace boost_no_complete_value_initialization
(IS_VALUE_INITIALIZED(m_derived_int_struct) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_derived_int_struct_array[0]) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_derived_int_struct_array[1]) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_char_array_struct) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_char_array_struct_array[0]) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_char_array_struct_array[1]) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_int_array_pair) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_int_array_pair_array[0]) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_int_array_pair_array[1]) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_enum_holder_and_int) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_enum_holder_and_int_array[0]) ? 0 : 1) +
(IS_VALUE_INITIALIZED(m_enum_holder_and_int_array[1]) ? 0 : 1) +
@ -446,9 +501,21 @@ namespace boost_no_complete_value_initialization
}
};
// Equivalent to the dirty_stack() function from GCC Bug 33916,
// "Default constructor fails to initialize array members", reported by
// Michael Elizabeth Chastain: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916
void dirty_stack()
{
unsigned char array_on_stack[sizeof(value_initializer) + 256];
for (unsigned i = 0; i < sizeof(array_on_stack); ++i)
{
array_on_stack[i] = 0x11;
}
}
int test()
{
dirty_stack();
// Check both value-initialization on the stack and on the heap:
const unsigned num_failures_on_stack = value_initializer().check();
const value_initializer* const ptr = new value_initializer();
@ -458,7 +525,7 @@ namespace boost_no_complete_value_initialization
{
std::cout << "Number of initialization failures on the stack: " << num_failures_on_stack
<< "\nNumber of initialization failures on the heap: " << num_failures_on_heap
<< "\nDetected by boost_no_complete_value_initialization::test() revision 7."
<< "\nDetected by boost_no_complete_value_initialization::test() revision 8."
<< std::endl;
}
return static_cast<int>(num_failures_on_stack + num_failures_on_heap);