Changeset View
Changeset View
Standalone View
Standalone View
contrib/capsicum-test/overhead.cc
- This file was added.
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| #include <sys/types.h> | |||||
| #include <sys/stat.h> | |||||
| #include <fcntl.h> | |||||
| #include <time.h> | |||||
| #include <unistd.h> | |||||
| #include "capsicum.h" | |||||
| #include "syscalls.h" | |||||
| #include "capsicum-test.h" | |||||
| #ifdef HAVE_SYSCALL | |||||
| double RepeatSyscall(int count, int nr, long arg1, long arg2, long arg3) { | |||||
| const clock_t t0 = clock(); // or gettimeofday or whatever | |||||
| for (int ii = 0; ii < count; ii++) { | |||||
| syscall(nr, arg1, arg2, arg3); | |||||
| } | |||||
| const clock_t t1 = clock(); | |||||
| return (t1 - t0) / (double)CLOCKS_PER_SEC; | |||||
| } | |||||
| typedef int (*EntryFn)(void); | |||||
| double CompareSyscall(EntryFn entry_fn, int count, int nr, | |||||
| long arg1, long arg2, long arg3) { | |||||
| double bare = RepeatSyscall(count, nr, arg1, arg2, arg3); | |||||
| EXPECT_OK(entry_fn()); | |||||
| double capmode = RepeatSyscall(count, nr, arg1, arg2, arg3); | |||||
| if (verbose) fprintf(stderr, "%d iterations bare=%fs capmode=%fs ratio=%.2f%%\n", | |||||
| count, bare, capmode, 100.0*capmode/bare); | |||||
| if (bare==0.0) { | |||||
| if (capmode==0.0) return 1.0; | |||||
| return 999.0; | |||||
| } | |||||
| return capmode/bare; | |||||
| } | |||||
| FORK_TEST(Overhead, GetTid) { | |||||
| EXPECT_GT(10, CompareSyscall(&cap_enter, 10000, __NR_gettid, 0, 0, 0)); | |||||
| } | |||||
| FORK_TEST(Overhead, Seek) { | |||||
| int fd = open("/etc/passwd", O_RDONLY); | |||||
| EXPECT_GT(50, CompareSyscall(&cap_enter, 10000, __NR_lseek, fd, 0, SEEK_SET)); | |||||
| close(fd); | |||||
| } | |||||
| #endif | |||||