warn-new-overaligned.cpp [plain text]
namespace test1 {
struct Test {
template <typename T>
struct SeparateCacheLines {
T data;
} __attribute__((aligned(256)));
SeparateCacheLines<int> high_contention_data[10];
};
void helper() {
Test t;
new Test; new Test[10]; }
}
namespace test2 {
class Test {
typedef int __attribute__((aligned(256))) aligned_int;
aligned_int high_contention_data[10];
};
void helper() {
Test t;
new Test; new Test[10]; }
}
namespace test3 {
struct Test {
template <typename T>
struct SeparateCacheLines {
T data;
} __attribute__((aligned(256)));
void* operator new(unsigned long) {
return 0;
}
SeparateCacheLines<int> high_contention_data[10];
};
void helper() {
Test t;
new Test;
new Test[10]; }
}
namespace test4 {
struct Test {
template <typename T>
struct SeparateCacheLines {
T data;
} __attribute__((aligned(256)));
void* operator new[](unsigned long) {
return 0;
}
SeparateCacheLines<int> high_contention_data[10];
};
void helper() {
Test t;
new Test; new Test[10];
}
}