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| 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/bpf_cgroup | |
| 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/bpf_cgroup')
| -rw-r--r-- | sys/linux/test/bpf_cgroup | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/linux/test/bpf_cgroup b/sys/linux/test/bpf_cgroup index 026470f3d..e28034c83 100644 --- a/sys/linux/test/bpf_cgroup +++ b/sys/linux/test/bpf_cgroup @@ -6,7 +6,7 @@ r1 = write$tcp_congestion(r0, &AUTO='reno\x00', AUTO) # Now, load a BPF_PROG_TYPE_CGROUP_SYSCTL that simply returns 0, which will block all writes to /proc/sys -r2 = bpf$PROG_LOAD(AUTO, &AUTO={0x17, AUTO, &AUTO=@framed={{AUTO, AUTO, AUTO, AUTO, 0x0, AUTO, AUTO, AUTO, 0x0}, [], {AUTO, AUTO, AUTO, AUTO}}, &AUTO='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0], 0x0, 0x12, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x78) +r2 = bpf$PROG_LOAD(AUTO, &AUTO={0x17, AUTO, &AUTO=@framed={{AUTO, AUTO, AUTO, AUTO, 0x0, AUTO, AUTO, AUTO, 0x0}, [], {AUTO, AUTO, AUTO, AUTO}}, &AUTO='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, "00000000000000000000000000000000", 0x0, 0x12, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x78) r3 = openat(0xffffffffffffff9c, &AUTO='./cgroup\x00', 0x0, 0x0) |