diff options
| author | Dmitry Vyukov <dvyukov@google.com> | 2021-04-21 08:01:30 +0200 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2021-04-21 14:05:20 +0200 |
| commit | ad3ce6afab30fb68cfcda40a1910b87279795c5a (patch) | |
| tree | 6a6febdaae83e071a85576bb6fa1fd5b8abb2936 /sys/linux/test/io_uring | |
| parent | 7ffd6ad61b0d0c6290f73b3652f79c63b305351e (diff) | |
pkg/compiler: optimize array[const] representation
Represent array[const[X, int8], N] as string["XX...X"].
This replaces potentially huge number of:
NONFAILING(*(uint8_t*)0x2000126c = 0);
NONFAILING(*(uint8_t*)0x2000126d = 0);
NONFAILING(*(uint8_t*)0x2000126e = 0);
with a single memcpy. In one reproducer we had 3991 such lines.
Also replace memcpy's with memset's when possible.
Update #1070
Diffstat (limited to 'sys/linux/test/io_uring')
| -rw-r--r-- | sys/linux/test/io_uring | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/linux/test/io_uring b/sys/linux/test/io_uring index a85a4cc70..3e7e80371 100644 --- a/sys/linux/test/io_uring +++ b/sys/linux/test/io_uring @@ -1,6 +1,6 @@ # Create an io_uring instance -r0 = syz_io_uring_setup(0x1, &AUTO={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, [0x0, 0x0, 0x0], [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0], [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}, &(0x7f00000a0000)=nil, &(0x7f00000b0000)=nil, &AUTO=<r1=>0x0, &AUTO=<r2=>0x0) +r0 = syz_io_uring_setup(0x1, &AUTO={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, "000000000000000000000000", [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0], [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]}, &(0x7f00000a0000)=nil, &(0x7f00000b0000)=nil, &AUTO=<r1=>0x0, &AUTO=<r2=>0x0) # Set IORING_CQ_EVENTFD_DISABLED. Has no side-effect for the test, # only tests syz_memcpy_off(). @@ -9,7 +9,7 @@ syz_memcpy_off$IO_URING_METADATA_FLAGS(r1, 0x114, &AUTO=0x1, 0x0, AUTO) # Write an openat2 operation to the submission queue -syz_io_uring_submit(r1, r2, &AUTO=@IORING_OP_OPENAT2={AUTO, 0x0, AUTO, 0xffffffffffffff9c, &AUTO={0x42, 0x0, 0x0}, &AUTO='./file1\x00', AUTO, AUTO, 0x12345, {AUTO, 0x0, [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]} }, 0x0) +syz_io_uring_submit(r1, r2, &AUTO=@IORING_OP_OPENAT2={AUTO, 0x0, AUTO, 0xffffffffffffff9c, &AUTO={0x42, 0x0, 0x0}, &AUTO='./file1\x00', AUTO, AUTO, 0x12345, {AUTO, 0x0, "0000000000000000000000000000000000000000"}}, 0x0) # Notify the kernel about the submission and wait until completion |