| Age | Commit message (Collapse) | Author |
|---|
|
|
|
`bytealg/indexbyte` will use AVX or SSE instruction set, if possible,
which could accelerate `CopyStringIn` function by 28%.
In worst case(CPU doesn't support SSE), `bytealg/indexbyte`
will degenerate to traversal lookup. When dealing with
short strings, `bytealg/indexbyte` has the same performance level as
before.
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Signed-off-by: Hang Su <darcy.sh@antfin.com>
|
|
They are no-ops, so the standard rule works fine.
PiperOrigin-RevId: 268776264
|
|
|
|
This can be merged after:
https://github.com/google/gvisor-website/pull/77
or
https://github.com/google/gvisor-website/pull/78
PiperOrigin-RevId: 253132620
|
|
|
|
Almost (?) all uses of CopyStringIn are via linux.copyInPath(), which
passes maxlen = linux.PATH_MAX = 4096. Pre-allocating a buffer of this
size is measurably inefficient in most cases: most paths will not be
this long, 4 KB is a lot of bytes to zero, and as of this writing the Go
runtime allocator maps only two 4 KB objects to each 8 KB span,
necessitating a call to runtime.mcache.refill() on ~every other call.
Limit the initial buffer size to 256 B instead, and geometrically
reallocate if necessary.
PiperOrigin-RevId: 251960441
|
|
|
|
Based on the guidelines at
https://opensource.google.com/docs/releasing/authors/.
1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./'
2. Manual fixup of "Google Inc" references.
3. Add AUTHORS file. Authors may request to be added to this file.
4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS.
Fixes #209
PiperOrigin-RevId: 245823212
Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
|
|
PiperOrigin-RevId: 245818639
Change-Id: I03703ef0fb9b6675955637b9fe2776204c545789
|
|
This is the same technique used by Go's strings.Builder
(https://golang.org/src/strings/builder.go#L45), and for the same
reason. (We can't just use strings.Builder because there's no way to get
the underlying []byte to pass to usermem.IO.CopyIn.)
PiperOrigin-RevId: 240594892
Change-Id: Ic070e7e480aee53a71289c7c120850991358c52c
|
|
MM.insertPMAsLocked() passes vma.maxPerms to memmap.Mappable.Translate
(although it unsets AccessType.Write if the vma is private). This
somewhat simplifies handling of pmas, since it means only COW-break
needs to replace existing pmas. However, it also means that a MAP_SHARED
mapping of a file opened O_RDWR dirties the file, regardless of the
mapping's permissions and whether or not the mapping is ever actually
written to with I/O that ignores permissions (e.g.
ptrace(PTRACE_POKEDATA)).
To fix this:
- Change the pma-getting path to request only the permissions that are
required for the calling access.
- Change memmap.Mappable.Translate to take requested permissions, and
return allowed permissions. This preserves the existing behavior in the
common cases where the memmap.Mappable isn't
fsutil.CachingInodeOperations and doesn't care if the translated
platform.File pages are written to.
- Change the MM.getPMAsLocked path to support permission upgrading of
pmas outside of copy-on-write.
PiperOrigin-RevId: 240196979
Change-Id: Ie0147c62c1fbc409467a6fa16269a413f3d7d571
|
|
It is Implemented without the priority inheritance part given
that gVisor defers scheduling decisions to Go runtime and doesn't
have control over it.
PiperOrigin-RevId: 236989545
Change-Id: I714c8ca0798743ecf3167b14ffeb5cd834302560
|
|
This adds an extra Reflection call to CopyObjectOut, but avoids many small
slice allocations if the object is large, since without this we grow the
backing slice incrementally as we encode more data.
PiperOrigin-RevId: 233110960
Change-Id: I93569af55912391e5471277f779139c23f040147
|
|
Nothing reads them and they can simply get stale.
Generated with:
$ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD
PiperOrigin-RevId: 231818945
Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
|
|
Signed-off-by: Haibo Xu <haibo.xu@arm.com>
PiperOrigin-RevId: 228249611
Change-Id: I1046e70bec4274f18b9948eefd6b0d546e4c48bb
|
|
PiperOrigin-RevId: 217951017
Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
|
|
PiperOrigin-RevId: 207125440
Change-Id: I6c572afb4d693ee72a0c458a988b0e96d191cd49
|
|
PiperOrigin-RevId: 207037226
Change-Id: I8b5f1a056d4f3eab17846f2e0193bb737ecb5428
|
|
PiperOrigin-RevId: 207007153
Change-Id: Ifedf1cc3758dc18be16647a4ece9c840c1c636c9
|
|
We have been unnecessarily creating too many savable types implicitly.
PiperOrigin-RevId: 206334201
Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8
|
|
PiperOrigin-RevId: 204323728
Change-Id: I1ff9aa062ffa12583b2e38ec94c87db7a3711971
|
|
PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
|
