So it's reachable from crypto/ecdsa and the upcoming crypto/ecdh.
No code changes.
For #52182
Change-Id: Ie3216052f46c6ef7ec64d8b87a233a9c50c4b16a
Reviewed-on: https://go-review.googlesource.com/c/go/+/398674
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
The goal of this CL is to move the implementation to the new interface
with the least amount of changes possible. A follow-up CL will add
documentation and cleanup the assembly API.
* SetBytes does the element and point validity checks now, which were
previously implemented with big.Int.
* p256BaseMult would return (0:0:1) if the scalar was zero, which is
not a valid encoding of the point at infinity, but would get
flattened into (0,0) by p256PointToAffine. The rest of the code can
cope with any encoding with Z = 0, not just (t²:t³:0) with t != 0.
* CombinedMult was only avoiding the big.Int and affine conversion
overhead, which is now gone when operating entirely on nistec types,
so it can be implemented entirely in the crypto/elliptic wrapper,
and will automatically benefit all NIST curves.
* Scalar multiplication can't operate on arbitrarily sized scalars (it
was using big.Int to reduce them), which is fair enough. Changed the
nistec point interface to let ScalarMult and ScalarBaseMult reject
scalars. The crypto/elliptic wrapper still does the big.Int
reduction as needed.
The ppc64le/s390x assembly is disabled but retained to make review of
the change that will re-enable it easier.
Very small performance changes, which we will more then recoup when
crypto/ecdsa moves to invoking nistec directly.
name old time/op new time/op delta
pkg:crypto/elliptic goos:darwin goarch:arm64
ScalarBaseMult/P256-8 11.3µs ± 0% 11.4µs ± 0% +0.87% (p=0.000 n=8+10)
ScalarMult/P256-8 42.2µs ± 0% 42.2µs ± 0% ~ (p=0.825 n=10+9)
MarshalUnmarshal/P256/Uncompressed-8 801ns ± 1% 334ns ± 0% -58.29% (p=0.000 n=9+10)
MarshalUnmarshal/P256/Compressed-8 798ns ± 0% 334ns ± 0% -58.13% (p=0.000 n=10+10)
pkg:crypto/ecdsa goos:darwin goarch:arm64
Sign/P256-8 19.3µs ± 1% 19.4µs ± 0% +0.81% (p=0.003 n=8+9)
Verify/P256-8 56.6µs ± 0% 56.3µs ± 1% -0.48% (p=0.003 n=7+10)
GenerateKey/P256-8 11.9µs ± 0% 12.0µs ± 0% +1.22% (p=0.000 n=7+9)
For #52182
Change-Id: I0690a387e20018f38da55141c0d2659280b1a630
Reviewed-on: https://go-review.googlesource.com/c/go/+/395775
Reviewed-by: Fernando Lobato Meeser <felobato@google.com>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
This enables publicationBarrier to be used as an intrinsic
on ppc64le/ppc64.
A call to this appears in test/bench/go1 BinaryTree17
Change-Id: If53528a82de99688270473cbe23472f37046ad65
Reviewed-on: https://go-review.googlesource.com/c/go/+/404056
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
Move the aesCipherGCM struct definition into cipher_asm.go, it is
needed to compile this file, but isn't used on PPC64.
Also, generate a KeySizeError if the key length is not supported
as was done in the ppc64le implementation, and is done in the
generic code.
Change-Id: I025fc63d614b57dac65a18d1ac3dbeec99356292
Reviewed-on: https://go-review.googlesource.com/c/go/+/399254
Reviewed-by: Filippo Valsorda <valsorda@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Paul Murphy <murp@ibm.com>
CL 403935 changed the API for typecheck.DeclFunc, while CL 403851 was
submitted in the mean time and added another call to it.
Change-Id: I0de59f34197bf241c1dd42cffbab7a91f9eb825d
Reviewed-on: https://go-review.googlesource.com/c/go/+/404434
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
No longer needed. We now always directly construct TFUNC types when
needed.
Change-Id: I1bb286c08539cbf97e331824f0f5464b5fd9c873
Reviewed-on: https://go-review.googlesource.com/c/go/+/403936
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
This CL reworks DeclFunc so that we no longer need to internally
create an ir.FuncType. The next CL will remove ir.FuncType entirely.
Change-Id: I1c02b1b0c35221f2448d6d3ab35cb327a2da40e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/403935
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Currently all typecheck.DeclFunc callers already construct a fresh new
ir.FuncType, which is the last type expression kind that we represent
in IR.
This CL pushes all of the ir.FuncType construction down into
typecheck.DeclFunc. The next CL will simplify the internals so that we
can get rid of ir.FuncType altogether.
Change-Id: I221ed324f157eb38bb57c8886609f53cc4fd99fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/403848
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Ident, ParenExpr, SelectorExpr, and StarExpr used to need to be
allowed as Ntypes for the old -G=0 type checker to represent some type
expressions before type checking, but now they're only ever used to
represent value expressions.
Change-Id: Idd4901ae6149ecc81acf1c52de3bc914d9e73418
Reviewed-on: https://go-review.googlesource.com/c/go/+/403844
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Type arguments are always type expressions, which are semantically
represented by Ntype.
In fact, the slice should probably just be []*types.Type instead, and
that would remove a lot of ir.TypeNode wrapping/unwrapping. But this
lead to issues within the stenciling code, and I can't immediately
make sense why.
Change-Id: Ib944db30e4d21284bc2d8d954b68ecb70b4205a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/403843
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
As with ir.CompLitExpr.Ntype, there's no need for
ir.TypeAssertExpr.Ntype in a pure-types2 world.
Change-Id: Iff48c98330f072fd6b26099e13a19c56adecdc42
Reviewed-on: https://go-review.googlesource.com/c/go/+/403842
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
It's no longer needed, since type expressions are all evaluated by
types2. We can just use Node.Type instead.
Change-Id: If523bd96f96fc4f2337a26f563f84e4f194e654a
Reviewed-on: https://go-review.googlesource.com/c/go/+/403841
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: David Chase <drchase@google.com>
All callers were already using TypeNode to get an Ntype anyway, so
just push the TypeNode constructor down into NewCompLitExpr. Prep
refactoring for next CL to remove the Ntype field.
Change-Id: I671935afca707aaab11d1c46e39902bd37a485ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/403840
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
No longer needed now that IR construction uses types2.
Change-Id: If8b7aff80cd8472be7d87fd3a36da911a5df163c
Reviewed-on: https://go-review.googlesource.com/c/go/+/403839
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This method used to be needed so the legacy typechecker could report
type declaration loops, but that's handled by types2 now.
Change-Id: Ie0d89e6dcff277778b12ed960b6b31669fd903a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/403838
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Prep refactoring for the next CL, which removes Name.Ntype
entirely. Pulled out separately because this logic is a little subtle,
so this should be easier to bisect in case there's something I'm
missing here.
Change-Id: I4ffec6ee62fcd036582e8d2c963edcbd8bac184f
Reviewed-on: https://go-review.googlesource.com/c/go/+/403837
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
It's never assigned/initialized, so replace all uses with nil.
Change-Id: If224075aab925536114d4ff77b3aaf6b4659c983
Reviewed-on: https://go-review.googlesource.com/c/go/+/403835
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
ir.NewField is always called with ntyp as nil.
Change-Id: Iccab4ce20ae70d056370a6469278e68774e685f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/403834
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
The CPU profiler adds goroutine labels to its samples based on
getg().m.curg. That allows the profile to correctly attribute work that
the runtime does on behalf of that goroutine on the M's g0 stack via
systemstack calls, such as using runtime.Callers to record the call
stack.
Those labels also cover work on the g0 stack via mcall. When the active
goroutine calls runtime.Gosched, it will receive attribution of its
share of the scheduler work necessary to find the next runnable
goroutine.
The execution tracer's attribution of CPU samples to specific goroutines
should match. When curg is set, attribute the CPU samples to that
goroutine's ID.
Fixes#52693
Change-Id: Ic9af92e153abd8477559e48bc8ebaf3739527b94
Reviewed-on: https://go-review.googlesource.com/c/go/+/404055
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Rhys Hiltner <rhys@justin.tv>
TryBot-Result: Gopher Robot <gobot@golang.org>
We used to use SHA1 for content hashes, but CL 402595 changed
all the “don't care” hashes to cmd/internal/notsha256 (negated SHA256).
This made object files a little bit bigger: fmt.a on my Mac laptop grows
from 910678 to 937612 bytes (+3%).
To remove that growth, truncate the hash we use for these purposes
to 128 bits (half a SHA256), and also use base64 instead of hex for
encoding it when a string form is needed. This brings fmt.a down to
901706 bytes (-1% from original, -4% from current).
Change-Id: Id81da1cf3ee85ed130b3cda73aa697d8c0053a62
Reviewed-on: https://go-review.googlesource.com/c/go/+/404294
Auto-Submit: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
In walkCompare, any ir.OCONVNOP was removed from both operands. So when
constructing assignments for them to preserve any side-effects, using
temporary variables can cause type mismatched with original type.
Instead, using blank assignments will prevent that issue and still make
sure that the operands will be evaluated.
Fixes#52701
Change-Id: I229046acb154890bb36fe441d258563687fdce37
Reviewed-on: https://go-review.googlesource.com/c/go/+/403997
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Add tests to test that -asan in Go can detect the error memory access
to the global objects.
Updates #44853.
Change-Id: I612a048460b497d18389160b66e6f818342d3941
Reviewed-on: https://go-review.googlesource.com/c/go/+/321716
Run-TryBot: Fannie Zhang <Fannie.Zhang@arm.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
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Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Since when its only usage is in maplit, and its body is simple enough to
be inlined directly at the caller side.
Change-Id: Id6b8a9d230d0e1e7f8da8d33bbc0073d3e816fb5
Reviewed-on: https://go-review.googlesource.com/c/go/+/403998
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
The only fields of the go list output that require BuildInfo to be
computed are the Stale and StaleReason fields. If a user explicitly
requests JSON fields and does not ask for Stale or StaleReason, skip
the computation of BuildInfo.
For #29666
Change-Id: Ie77581c44babedcb5cb7f3dc7d6ed1078b56eee4
Reviewed-on: https://go-review.googlesource.com/c/go/+/402736
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
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Auto-Submit: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Using the CR bit register arguments makes it more easy to
understand which condition and CR field is being tested when
using ISEL.
Likewise, cleanup optab setup for ISEL. ISEL should only
accept a 5 bit unsigned constant (C_U5CON), and C_ZCON
arguments are accepted by a C_U5CON optab arg.
Change-Id: I2495dbe3595dd3f16c510b3492a88133af9f7e1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/402375
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
It is hit ~70k times building go.
This make the go binary, 0.04% smaller.
I didn't included benchmarks because this is just constant foldings
and is hard to mesure objectively.
For example, this enable rewriting things like:
if x == 20 {
return x + 30 + z
}
Into:
if x == 20 {
return 50 + z
}
It's not just fixing programer's code,
the ssa generator generate code like this sometimes.
Change-Id: I0861f342b27f7227b5f1c34d8267fa0057b1bbbc
GitHub-Last-Rev: 4c2f9b5216
GitHub-Pull-Request: golang/go#52669
Reviewed-on: https://go-review.googlesource.com/c/go/+/403735
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Reviewed-by: David Chase <drchase@google.com>
This is a port of CL 402256 from the syntax package to go/parser
with adjustments because of the different AST structure, and
excluding any necessary go/printer changes (separate CL).
Type parameter lists starting with the form [name *T|...] or
[name (X)|...] may look like an array length expression [x].
Only after parsing the entire initial expression and checking
whether the expression contains type elements or is followed
by a comma can we make the final decision.
This change simplifies the existing parsing strategy: instead
of trying to make an upfront decision with limited information
(which is insufficient), the parser now parses the start of a
type parameter list or array length specification as expression.
In a second step, if the expression can be split into a name
followed by a type element, or a name followed by an ordinary
expression which is succeeded by a comma, we assume a type
parameter list (because it can't be an array length).
In all other cases we assume an array length specification.
Fixes#52559.
Change-Id: I11ab6e62b073b78b2331bb6063cf74d2a9eaa236
Reviewed-on: https://go-review.googlesource.com/c/go/+/403937
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Fixes#51115
Change-Id: I3c5296e4adc71c1c1b1808a45abd4801ae43465a
GitHub-Last-Rev: 4c197acd51
GitHub-Pull-Request: golang/go#51990
Reviewed-on: https://go-review.googlesource.com/c/go/+/396215
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Run-TryBot: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
With this patch, -asan option can detect the error memory
access to global variables.
So this patch makes a few changes:
1. Add the asanregisterglobals runtime support function,
which calls asan runtime function _asan_register_globals
to register global variables.
2. Create a new initialization function for the package
being compiled. This function initializes an array of
instrumented global variables and pass it to function
runtime.asanregisterglobals. An instrumented global
variable has trailing redzone.
3. Writes the new size of instrumented global variables
that have trailing redzones into object file.
4. Notice that the current implementation is only compatible with
the ASan library from version v7 to v9. Therefore, using the
-asan option requires that the gcc version is not less than 7
and the clang version is less than 4, otherwise a segmentation
fault will occur. So this patch adds a check on whether the compiler
being used is a supported version in cmd/go.
(This is a redo of CL 401775 with a fix for a build break due to an
intervening commit that removed the internal/execabs package.)
Updates #44853.
Change-Id: I719d4ef2b22cb2d5516e1494cd453c3efb47d6c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/403851
Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
This shows up in a few crypto functions, and other
assorted places.
Change-Id: I5a7f4c25ddd4a6499dc295ef693b9fe43d2448ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/404057
Run-TryBot: Paul Murphy <murp@ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
These implementations will inline to the lower-level primitives,
but they hide the underlying values so that all accesses are
forced to use the atomic APIs. They also allow the use of shorter
names (methods instead of functions) at call sites, making code
more readable.
Pointer[T] also avoids conversions using unsafe.Pointer at call sites.
Discussed on #47141.
See also https://research.swtch.com/gomm for background.
Fixes#50860.
Change-Id: I0b178ee0c7747fa8985f8e48cd7b01063feb7dcc
Reviewed-on: https://go-review.googlesource.com/c/go/+/381317
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
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This entrypoint was missed in CL 349600, and the behavior happened not
to be covered by existing tests.
Fixes#52331.
Change-Id: Iccf12e8e633215abe4bfa1c3ca2fe3a8391b5ba5
Reviewed-on: https://go-review.googlesource.com/c/go/+/401536
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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Reviewed-by: Michael Matloob <matloob@golang.org>
With this patch, -asan option can detect the error memory
access to global variables.
So this patch makes a few changes:
1. Add the asanregisterglobals runtime support function,
which calls asan runtime function _asan_register_globals
to register global variables.
2. Create a new initialization function for the package
being compiled. This function initializes an array of
instrumented global variables and pass it to function
runtime.asanregisterglobals. An instrumented global
variable has trailing redzone.
3. Writes the new size of instrumented global variables
that have trailing redzones into object file.
4. Notice that the current implementation is only compatible with
the ASan library from version v7 to v9. Therefore, using the
-asan option requires that the gcc version is not less than 7
and the clang version is less than 4, otherwise a segmentation
fault will occur. So this patch adds a check on whether the compiler
being used is a supported version in cmd/go.
Updates #44853.
Change-Id: Ib877a817209ab2be68a8e22c418fe4a4a20880fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/401775
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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LLVM has SystemZ ThreadSanitizer support now [1], this patch integrates
it with golang. The biggest part is the glue code in race_s390x.s,
which is derived from race_arm64.s, and then the support needs to be
enabled in four places.
[1] https://reviews.llvm.org/D105629
Change-Id: I1d4e51beb4042603b681e4aca9af6072879d54d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/336549
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
