Bcc tools memleak can not identify memory leaks by new operator under tcmalloc library?

[selfboot]

I used tcmalloc as a memory allocator, and then after new memory, it was not reclaimed and was not recognized by the bcc tool memleak.

// leak_lib.cpp
namespace LeakLib {
    void slowMemoryLeak() {
        int oneMbSize = 262144;
        while (true) {
            int* p = new int[262144];
            for (int i = 0; i < 262144; ++i) {
                p[i] = i; // Assign values to occupy physical memory
            }
            sleep(1); // wait for 1 second
        }
    }
}

// main.cpp
#include <iostream>

namespace LeakLib {
    void slowMemoryLeak();
}

int caller() {
    std::cout << "In caller" << std::endl;
    LeakLib::slowMemoryLeak();
    return 0;
}
int main() {
    std::cout << "Starting slow memory leak program..." << std::endl;
    caller();
    return 0;
}

Makefile:

all: main

main: main.o libLeak.a
	g++ -o main main.o -L. -lLeak -ltcmalloc -Wl,-rpath,/usr/local/lib -fno-omit-frame-pointer

main.o: main.cpp
	g++ -c main.cpp -fno-omit-frame-pointer -g

libLeak.a: leak_lib.o
	ar rcs libLeak.a leak_lib.o

leak_lib.o: leak_lib.cpp
	g++ -c leak_lib.cpp -o leak_lib.o -fno-omit-frame-pointer -g

clean:
	rm -f *.o *.a main

Here's the output of memleak

$ memleak -p $(pgrep main) --combined-only
Attaching to pid 1118961, Ctrl+C to quit.
[19:28:55] Top 10 stacks with outstanding allocations:

[19:29:00] Top 10 stacks with outstanding allocations:

[19:29:05] Top 10 stacks with outstanding allocations:

[19:29:10] Top 10 stacks with outstanding allocations:

[selfboot]

When change to malloc, It behaves normally.

// namespace LeakLib {
//     void slowMemoryLeak() {
//         int oneMbSize = 262144;
//         while (true) {
//             // 使用 malloc 分配内存
//             int* p = (int*)malloc(oneMbSize * sizeof(int));
//             for (int i = 0; i < oneMbSize; ++i) {
//                 p[i] = i; // Assign values to occupy physical memory
//             }
//             sleep(1); // wait for 1 second
//             // 注意：由于这是一个内存泄露示例，因此我们不调用 free(p);
//         }
//     }
// }

[Bojun-Seo]

memleak uses libc as a default target object to attach uprobe. You can use other library with --obj option.