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add memfd sample

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MITSUNARI Shigeo 2022-03-08 10:27:11 +09:00
parent 507b0285ee
commit 2861517f25
2 changed files with 35 additions and 0 deletions
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4
sample/Makefile
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@ -37,6 +37,7 @@ endif
ifneq ($(OS),mac)
TARGET += static_buf64
TARGET += memfd
endif
@ -95,6 +96,8 @@ jmp_table:
$(CXX) $(CFLAGS) jmp_table.cpp -o $@ -m32
jmp_table64:
$(CXX) $(CFLAGS) jmp_table.cpp -o $@ -m64
memfd:
$(CXX) $(CFLAGS) memfd.cpp -o $@ -m64
profiler: profiler.cpp ../xbyak/xbyak_util.h
$(CXX) $(CFLAGS) profiler.cpp -o $@
profiler-vtune: profiler.cpp ../xbyak/xbyak_util.h
@ -121,3 +124,4 @@ test_util : test_util.cpp $(XBYAK_INC) ../xbyak/xbyak_util.h
test_util2 : test_util.cpp $(XBYAK_INC) ../xbyak/xbyak_util.h
jmp_table: jmp_table.cpp $(XBYAK_INC)
jmp_table64: jmp_table.cpp $(XBYAK_INC)
memfd: memfd.cpp $(XBYAK_INC)

31
sample/memfd.cpp Normal file
View file

@ -0,0 +1,31 @@
/*
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>
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("abc", 123);
Code c2("xyz", 456);
printf("c1 %d\n", c1.getCode<int (*)()>()());
printf("c2 %d\n", c2.getCode<int (*)()>()());
getchar();
}