This patch detects at which index position profiling samples that have
the value-type samples count are, instead of the previously hard-coded
position of index 1. Runtime generated profiles always generate CPU
profiling data with the 0 index being CPU nanoseconds, and samples count
at index 1, which is why this previously hasn't come up.
This is a redo of CL 465135, now allowing empty profiles. Note that
preprocessProfileGraph will already cause pgo.New to return nil for
empty profiles.
Fixes#58292
Change-Id: Ia6c94f0793f6ca9b0882b5e2c4d34f38e600c1e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/466675
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This can happen in reasonable code because NewReader(r) can return r,
if r is already a Reader.
Similarly for Writer.
Fixes#58423
Change-Id: Iff9d9265410bee68fbaeb7175369847bd737eb2c
Reviewed-on: https://go-review.googlesource.com/c/go/+/466815
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Fix a misuse of bufio.Reader.Read in the helper class
cmd/internal/cov.MReader; the MReader method in question should have
been using io.ReadFull (passing the bufio.Reader) instead of directly
calling Read.
Using the Read method instead of io.ReadFull will result in a "short"
read when processing a specific subset of counter data files, e.g.
those that are short enough to not trigger the mmap-based scheme we
use for larger files, but also with a large args section (something
large enough to exceed the default 4k buffer size used by
bufio.Reader).
Along the way, add some additional defered Close() calls for files
opened by the CovDataReader.visitPod, to enure we don't leave any open
file descriptor following a call to CovDataReader.Visit.
Fixes#58411.
Change-Id: Iea48dc25c0081be1ade29f3a633df02a681fd941
Reviewed-on: https://go-review.googlesource.com/c/go/+/466677
Run-TryBot: Than McIntosh <thanm@google.com>
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In general it seems ok to assume that an open-source module that did
exist will continue to do so — after all, users of open-source modules
already do that all the time. However, we should not assume that those
modules do not publish new versions — that's really up to their
maintainers to decide.
Two existing tests did make that assumption for the module
gopkg.in/natefinch/lumberjack.v2. Let's remove those two tests.
If we need to replace them at some point, we can replace them with
hermetic test-only modules (#54503) or perhaps modules owned by the Go
project.
Fixes#58445.
Change-Id: Ica8fe587d86fc41f3d8445a4cd2b8820455ae45f
Reviewed-on: https://go-review.googlesource.com/c/go/+/466860
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This reverts CL 456555.
Reason for revert: This seems too likely to exercise race conditions
in code where a Write call continues to access its buffer after
returning. The HTTP/2 ResponseWriter is one such example.
Reverting this change while we think about this some more.
For #57202
Change-Id: Ic86823f81d7da410ea6b3f17fb5b3f9a979e3340
Reviewed-on: https://go-review.googlesource.com/c/go/+/467095
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
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Small cleanup to remove a couple of needless global variables.
Instead of relying on two instances of emptyCtx having different
addresses, we use different types.
For #26775
Change-Id: I0bc4813e94226f7b3f52bf4b1b3c3a3bbbebcc9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/455455
Reviewed-by: Damien Neil <dneil@google.com>
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Reviewed-by: Sameer Ajmani <sameer@golang.org>
Darwin needs the osinit_hack call to fix some bugs in the Apple libc
that surface when Go programs call exec. On iOS, the functions that
osinit_hack uses are not available, so signing fails. But on iOS exec
is also unavailable, so the hack is not needed. Disable it there,
which makes signing work again.
Fixes#58323.
Change-Id: I3f1472f852bb36c06854fe1f14aa27ad450c5945
Reviewed-on: https://go-review.googlesource.com/c/go/+/466516
Run-TryBot: Russ Cox <rsc@golang.org>
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`windows-amd64-2008` builder does no longer exist on go1.20,
so it is safe to remove conditions checking for that name.
Updates #57003Closes#56904
Change-Id: I941ccc64cda0af3b9356996c4b581700afa81987
Reviewed-on: https://go-review.googlesource.com/c/go/+/467175
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Update the code that tries to satisfy unresolved references to
"__stack_chk_fail_local" to look for "libssp_nonshared.a" in addition
to "libc_nonshared.a" (the former archive is the correct place on
Alpine).
Updates #52919.
Updates #54313.
Updates #57261.
Fixes#58385.
Change-Id: Id6cd3ebb4d5388df50a838e6efa5e5b683545b01
Reviewed-on: https://go-review.googlesource.com/c/go/+/466936
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Add -fno-stack-protector back to the default set of CFLAGS for cgo, so
as to avoid problems with internal linking locating the library
containing the "__stack_chk_fail_local" support function that some
compilers emit (the specific archive can vary based on GOOS).
Updates #52919.
Updates #54313.
Updates #57261.
Updates #58385.
Change-Id: I4591bfb15501f04b7afe1fcd50c4fb93c86db63d
Reviewed-on: https://go-review.googlesource.com/c/go/+/466935
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
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Issue an error (instead of crashing) when encountering a symbol that
requires dynamic relocations on mips/mips64. The dynimport support is
in progress, but is not done yet, so rather than crashing, print a
message indicating that the feature is not yet implemented and exit.
Fixes#58240.
Change-Id: I9ad64c89e4f7b4b180964b35ad1d72d375f2df7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/466895
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It currently says only what it wasn't good for, which is not helpful.
Change-Id: I468c7f385c14eaca99788a94d53c30b729ed0944
Reviewed-on: https://go-review.googlesource.com/c/go/+/466276
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For unification we only need the handles map.
The type parameter list was stored for reproducible printing only,
but we can achieve the same effect with sorting.
This opens the door to adding type parameters from different
types/functions that we may want to infer together. They may
be added through separate "addTypeParams" calls in the future.
Printing (which is used for debugging only) will remain reproducible.
Change-Id: I23b56c63fa45a7d687761f2efcf558e61b004584
Reviewed-on: https://go-review.googlesource.com/c/go/+/466955
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Rather than referring back to the type parameter list stored with
the unifier, return inferred types for a given list of type parameters.
This decouples the unifier more and opens the door for inference to
consider type parameters from multiple types for inference.
While at it, introduce an internal flag to control whether
inference results of the two inference implementations should
be compared or not.
Change-Id: I23b254c6c1c750f5bd1360aa2bb088cc466434f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/466795
Reviewed-by: Robert Griesemer <gri@google.com>
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Change-Id: I4f9b84696f55c6b381de60682f8b242098b95b75
GitHub-Last-Rev: 74a6013a9e
GitHub-Pull-Request: golang/go#58402
Reviewed-on: https://go-review.googlesource.com/c/go/+/466335
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This change introduces the Compare and Compare32 functions
based on the total-ordering predicate in IEEE-754, section 5.10.
In particular,
* -NaN is ordered before any other value
* +NaN is ordered after any other value
* -0 is ordered before +0
* All other values are ordered the usual way
name time/op
Compare-8 0.24ns ± 1%
Compare32-8 0.24ns ± 0%
Fixes#56491.
Change-Id: I9444fbfefe26741794c4436a26d403b8da97bdaf
Reviewed-on: https://go-review.googlesource.com/c/go/+/459435
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The Error type used in failed fetch invocations contain more
information than we're currently extracting. Optimistically
look for the cause field for extra context for errors.
Change-Id: I6c8e4b230a21ec684af2107707aa605fc2148fcf
Reviewed-on: https://go-review.googlesource.com/c/go/+/463978
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Reviewed-by: Evan Phoenix <evan@phx.io>
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The existing runtime_expandFinalInlineFrame implementation doesn't skip trailing wrappers, but
gentraceback does skip wrapper functions.
This change makes runtime_expandFinalInlineFrame handling wrapper functions consistent to gentraceback.
Fixes#58288
Change-Id: I1b0e2c10b0a89bcb1e787b98d27730cb40a34406
Reviewed-on: https://go-review.googlesource.com/c/go/+/465097
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There are a plenty of regression in 1.20 with this optimization. This CL
disable inline static init, so it's safer to backport to 1.20 branch.
The optimization will be enabled again during 1.21 cycle.
Updates #58293
Updates #58339
For #58293
Change-Id: If5916008597b46146b4dc7108c6b389d53f35e95
Reviewed-on: https://go-review.googlesource.com/c/go/+/467015
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Reviewed-by: Keith Randall <khr@google.com>
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This global variable was used by the old frontend to decide whether to
perform escape analysis during method wrapper generation.
The old frontend is gone now, the variable is not used anywhere else.
Change-Id: I448f2761ea608a9a2ec39a9920fcf7aa12d98799
Reviewed-on: https://go-review.googlesource.com/c/go/+/466278
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This patch fixes a panic from incorrect interface conversion from
*ir.BasicLit to *ir.ConstExpr. This only occurs when nounified
GOEXPERIMENT is set, so ideally it should be backported to Go
1.20 and removed from master.
Fixes#58339
Change-Id: I357069d7ee1707d5cc6811bd2fbdd7b0456323ae
GitHub-Last-Rev: 641dedb5f9
GitHub-Pull-Request: golang/go#58389
Reviewed-on: https://go-review.googlesource.com/c/go/+/466175
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Since go1.19, these errors are already reported by types2 for any user's
Go code. Compiler generated code, which looks like constant expression
should be evaluated as non-constant semantic, which allows overflows.
Fixes#58293
Change-Id: I6f0049a69bdb0a8d0d7a0db49c7badaa92598ea2
Reviewed-on: https://go-review.googlesource.com/c/go/+/465096
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These functions are linked using go:linkname, but do not match the
original declarations. This change brings these in sync.
Change-Id: I16651304c3dba2f9897c2c42e30555d2f7805c2a
Reviewed-on: https://go-review.googlesource.com/c/go/+/466615
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The tests for cmd/go/internal/test were not running at all due to a
missed call to m.Run in TestMain. That masked two missing vet
analyzers ("directive" and "timeformat") and a missed update to the
generator script in CL 355452.
Fixes#58415.
Change-Id: I7b0315952967ca07a866cdaa5903478b2873eb7a
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This gets eliminated by thoses rules above:
// for rewriting results of some late-expanded rewrites (below)
(SelectN [0] (MakeResult x ___)) => x
(SelectN [1] (MakeResult x y ___)) => y
(SelectN [2] (MakeResult x y z ___)) => z
Fixes#58161
Change-Id: I4fbfd52c72c06b6b3db906bd9910b6dbb7fe8975
Reviewed-on: https://go-review.googlesource.com/c/go/+/463846
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This reverts CL 465135.
Reason for revert: This broke cmd/go.TestScript/build_pgo on the linux-amd64-longtest builder: https://build.golang.org/log/8f8ed7bf576f891a06d295c4a5bca987c6e941d6
Change-Id: Ie2f2cc2731099eb28eda6b94dded4dfc34e29441
Reviewed-on: https://go-review.googlesource.com/c/go/+/466439
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Fix a minor buglet in atomic mode fixup that would generate
non-compilable code for a package containing only the "package X"
clause with no trailing newline following the "X".
Fixes#58370.
Change-Id: I0d9bc4f2b687c6bd913595418f6db7dbe50cc5df
Reviewed-on: https://go-review.googlesource.com/c/go/+/466115
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
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This patch detects at which index position profiling samples that have the value-type samples count are, instead of the previously hard-coded position of index 1. Runtime generated profiles always generate CPU profiling data with the 0 index being CPU nanoseconds, and samples count at index 1, which is why this previously hasn't come up.
Fixes#58292
Change-Id: Idde761d53b02259f3076c4e5dcb4a96a9d53df0e
GitHub-Last-Rev: dabbf9f88c
GitHub-Pull-Request: golang/go#58294
Reviewed-on: https://go-review.googlesource.com/c/go/+/465135
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- Fix typo in throw error message for arena.
- Correct typos in assembly and Go comments.
- Fix log message in TestTraceCPUProfile.
Change-Id: I874c9e8cd46394448b6717bc6021aa3ecf319d16
GitHub-Last-Rev: d27fad4d3c
GitHub-Pull-Request: golang/go#58375
Reviewed-on: https://go-review.googlesource.com/c/go/+/465975
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CL 465515 instrinsify these functions, so that we can remove them.
Change-Id: I81c9eb62ecf56d5a292dc5aced542b36b53847dc
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The BSWAPL instruction is supported in i486 and newer.
https://github.com/golang/go/wiki/MinimumRequirements#386 says we
support "All Pentium MMX or later". The Pentium is also referred to as
i586, so that we are safe with these instructions.
Change-Id: I6dea1f9d864a45bb07c8f8f35a81cfe16cca216c
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Blank node must be ignored when building arguments substitued tree.
Otherwise, it could be used to replace other blank node in left hand
side of an assignment, causing an invalid IR node.
Consider the following code:
type S1 struct {
s2 S2
}
type S2 struct{}
func (S2) Make() S2 {
return S2{}
}
func (S1) Make() S1 {
return S1{s2: S2{}.Make()}
}
var _ = S1{}.Make()
After staticAssignInlinedCall, the assignment becomes:
var _ = S1{s2: S2{}.Make()}
and the arg substitued tree is "map[*ir.Name]ir.Node{_: S1{}}". Now,
when doing static assignment, if there is any assignment to blank node,
for example:
_ := S2{}
That blank node will be replaced with "S1{}":
S1{} := S2{}
So constructing an invalid IR which causes the ICE.
Fixes#58325
Change-Id: I21b48357f669a7e02a7eb4325246aadc31f78fb9
Reviewed-on: https://go-review.googlesource.com/c/go/+/465098
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Change-Id: I5e3aca2b8fc78f38c9e2cdc67adf86d57ac85b1c
GitHub-Last-Rev: 0e5ddffe33
GitHub-Pull-Request: golang/go#58353
Reviewed-on: https://go-review.googlesource.com/c/go/+/465615
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CL 458619 fixed the problem un-intentionally, so adding test to prevent
regression happening.
Updates #58345
Change-Id: I80cf60716ef85e142d769e8621fce19c826be03d
Reviewed-on: https://go-review.googlesource.com/c/go/+/465455
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This CL marks some darwin assembly functions as NOFRAME to avoid relying
on the implicit amd64 NOFRAME heuristic, where NOSPLIT functions
without stack were also marked as NOFRAME.
This is a second attempt after CL 460235 was reverted.
Change-Id: I790f2108fc01ec193aa32b0bc82362c2344a9f3b
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The usage of ISELB has been removed as part of changes
made to support Power10 SETBC instructions.
Change-Id: I2fce4370f48c1eeee65d411dfd1bea4201f45b45
Reviewed-on: https://go-review.googlesource.com/c/go/+/465575
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Archana Ravindar <aravind5@in.ibm.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
CL 461958 fixed a potential panic,
but also introduced an observable regression where
invalid input could be detected before the panic occurs.
Adjust the check to preserve prior behavior,
while also preventing the panic.
Change-Id: I52819f88a6a64883fbc9fd512697c38c29ca0ccd
Reviewed-on: https://go-review.googlesource.com/c/go/+/465855
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Return an explicit error when PrivateKey.ECDH is called with a PublicKey
which uses a different Curve. Also document this requirement, even
though it is perhaps obvious.
Fixes#58131
Change-Id: I739181a3f1283bed14fb5ee7eb78658b854d28d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/464335
Reviewed-by: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
Auto-Submit: Roland Shoemaker <roland@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
This patch changes the compiler's pkg init machinery to pick out large
initialization assignments to global maps (e.g.
var mymap = map[string]int{"foo":1, "bar":2, ... }
and extract the map init code into a separate outlined function, which is
then called from the main init function with a weak relocation:
var mymap map[string]int // KEEP reloc -> map.init.0
func init() {
map.init.0() // weak relocation
}
func map.init.0() {
mymap = map[string]int{"foo":1, "bar":2}
}
The map init outlining is done selectively (only in the case where the
RHS code exceeds a size limit of 20 IR nodes).
In order to ensure that a given map.init.NNN function is included when
its corresponding map is live, we add dummy R_KEEP relocation from the
map variable to the map init function.
This first patch includes the main compiler compiler changes, and with
the weak relocation addition disabled. Subsequent patch includes the
requred linker changes along with switching to the call to the
outlined routine to a weak relocation. See the later linker change for
associated compile time performance numbers.
Updates #2559.
Updates #36021.
Updates #14840.
Change-Id: I1fd6fd6397772be1ebd3eb397caf68ae9a3147e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/461315
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
People are using this to get the name of the function from a function type:
runtime.FuncForPC(reflect.ValueOf(fn).Pointer()).Name()
Unfortunately, this technique falls down when the first instruction
of the function is from an inlined callee. Then the expression above
gets you the name of the inlined function instead of the function itself.
To fix this, ensure that the first instruction is never from an inlinee.
Normally functions have prologs so those are already fine. In just the
cases where a function is a leaf with no local variables, and an instruction
from an inlinee appears first in the prog list, add a nop at the start
of the function to hold a non-inlined position.
Consider the nop a "mini-prolog" for leaf functions.
Fixes#58300
Change-Id: Ie37092f4ac3167fe8e5ef4a2207b14abc1786897
Reviewed-on: https://go-review.googlesource.com/c/go/+/465076
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: David Chase <drchase@google.com>
