Valgrind报告不匹配free() / delete / delete []
Valgrind报告不匹配free() / delete / delete []
提问于 2016-11-09 23:00:43
我正在编写一个可以在多个系统上运行的库(其中一些系统没有malloc或stdlib)。在我的stdlib (不同的库)中，我覆盖了new和delete操作符，以便对函数进行通用调用(本例中没有这些函数)。每个系统将覆盖对其各自的内存分配设备的这些通用调用。
问题是当我尝试这样做的时候。以下是一些简化的示例代码，用于重现该问题：
#include <cstdlib>
void* operator new(unsigned long size) {
return std::malloc(size); // would normally call an intermediate function which would be overridden by the system
}
void operator delete(void* object) {
std::free(object); // would normally call an intermediate function which would be overridden by the system
}
void operator delete(void* object, unsigned long size) {
std::free(object); // would normally call an intermediate function which would be overridden by the system
}
class MyClass {
};
int main() {
MyClass* myClass = new MyClass();
delete myClass;
}当我用普通的gcc-6 (无参数)构建它，并用valgrind (无参数)运行时，我得到这个错误：
==11219== Mismatched free() / delete / delete []
==11219== at 0x4C2DD6B: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==11219== by 0x108730: operator delete(void*, unsigned long) (in /home/chris13524/tmp/test.o)
==11219== by 0x10875A: main (in /home/chris13524/tmp/test.o)
==11219== Address 0x5200040 is 0 bytes inside a block of size 1 alloc'd
==11219== at 0x4C2D1AF: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==11219== by 0x108745: main (in /home/chris13524/tmp/test.o)看起来delete操作符工作正常，但是Valgrind正在覆盖我被覆盖的new操作符。你知道怎么解决这个问题吗？
删除中间函数不是一个选项，因为我在其中有其他代码。
它如何在我的实际程序中工作的示例(同样，在我的示例中没有显示)：
new => create => <intermediate code> => createImpl => malloc
create => <intermediate code> => createImpl => malloc我使用的是gcc v6.2.0、valgrind v3.12.0和Ubuntu 16.10。
回答 1
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/40509986
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