39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
/*
|
|
a sample to use MmapAllocator with an user-defined name
|
|
cat /proc/`psidof ./memfd`/maps
|
|
|
|
7fca70b44000-7fca70b4a000 rw-p 00000000 00:00 0
|
|
7fca70b67000-7fca70b68000 rwxs 00000000 00:05 19960170 /memfd:xyz (deleted)
|
|
7fca70b68000-7fca70b69000 rwxs 00000000 00:05 19960169 /memfd:abc (deleted)
|
|
7fca70b69000-7fca70b6a000 r--p 00029000 103:03 19136541 /lib/x86_64-linux-gnu/ld-2.27.so
|
|
7fca70b6a000-7fca70b6b000 rw-p 0002a000 103:03 19136541 /lib/x86_64-linux-gnu/ld-2.27.so
|
|
*/
|
|
#define XBYAK_USE_MEMFD
|
|
#include <xbyak/xbyak.h>
|
|
#include <fstream>
|
|
|
|
class Code : Xbyak::MmapAllocator, public Xbyak::CodeGenerator {
|
|
public:
|
|
Code(const char *name, int v)
|
|
: Xbyak::MmapAllocator(name)
|
|
, Xbyak::CodeGenerator(4096, nullptr, this /* specify external MmapAllocator */)
|
|
{
|
|
mov(eax, v);
|
|
ret();
|
|
}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
Code c1("Xbyak::abc", 123);
|
|
Code c2("Xbyak::xyz", 456);
|
|
printf("c1 %d\n", c1.getCode<int (*)()>()());
|
|
printf("c2 %d\n", c2.getCode<int (*)()>()());
|
|
std::ifstream ifs("/proc/self/maps", std::ios::binary);
|
|
if (ifs) {
|
|
std::string line;
|
|
while (std::getline(ifs, line)) {
|
|
printf("%s\n", line.c_str());
|
|
}
|
|
}
|
|
}
|