Add in the documentation of the new declarations and type descriptors to
support parameterized functions and types.
Change-Id: Ia21c544caa704309cc8fd639f104c192e1786b72
Reviewed-on: https://go-review.googlesource.com/c/go/+/350951
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
This is to keep in alignment with the naming in go/types.
Change-Id: I19ded29b39665d7b892fdbc8e92c7f15caf7ab66
Reviewed-on: https://go-review.googlesource.com/c/go/+/350950
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a minimally invasive fix proposal for #45940. which keeps the fix for #26197.
an alternative for (#26197) could be to fail if we have both flags. adding/removing a flag without an message to the user is inconvenient.
Change-Id: I6ac2524d81ff57202fbe3032a53afd5106270a9e
GitHub-Last-Rev: edaf02fa45
GitHub-Pull-Request: golang/go#45989
Reviewed-on: https://go-review.googlesource.com/c/go/+/317569
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As with other recent issues, the Init field of a range loop was not
being handled properly. Generally, it is much better to explicitly
import/export the Init statements, else they are incorrectly added
before the associated node, rather than as the Init value of the node.
This was causing labels to not be correctly added to the range loop that
it is immediately preceding.
Made the ORANGE handling completely similar to the OFOR handling.
Fixes#48462
Change-Id: I999530e84f9357f81deaa3dda50660061f710e7c
Reviewed-on: https://go-review.googlesource.com/c/go/+/350911
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.com>
CL 342350 fixed panic with dead hidden closures, by marking discarded
hidden closure as dead, and won't compile them. However, the fix is
incomplete. In case the "if" or "else" block end with panic or return
statement:
if true { return }
# All nodes starts from here are dead
the dead nodes must be processed with markHiddenClosureDead, but they
are not, causing the compiler crashes.
This CL adds that missing part.
Fixes#48459
Change-Id: Ibdd10a61fc6459d139bbf4a66b0893b523ac6b67
Reviewed-on: https://go-review.googlesource.com/c/go/+/350695
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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When registering an RPC server, the type being registered may
have additional methods that are not meant to be exposed as
RPC endpoints. Remove the warnings net/rpc produces in
this case. The functionality to report warnings is kept in the code
with a compile-time constant that can be enabled for debugging.
The documentation of net/rpc states that only methods
satisfying a set of criteria will be made available, while other
methods will be ignored.
Fixes#19957
Change-Id: I5f8a148b4be1fdfffb2cd2029871193eaf24b751
Reviewed-on: https://go-review.googlesource.com/c/go/+/350009
Reviewed-by: Daniel Lublin <daniel@lublin.se>
Reviewed-by: Damien Neil <dneil@google.com>
Trust: Carlos Amedee <carlos@golang.org>
We used to not SSA ".this" variable, because in tail-call method
wrappers it relies on updating ".this" in place in memory, and
the tail call IR node and SSA op do not have an explicit use of
".this". It is no longer the case for the new tail call
representation. Remove the restriction.
Change-Id: I4e1ce8459adbb0d5a80c64f1ece982737bd95305
Reviewed-on: https://go-review.googlesource.com/c/go/+/350751
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The previous CL re-enables tail calls for method wrappers. But
with the changed IR and SSA representation, for stack arguments
it generates self copies. This CL makes the compiler detect the
self copies and remove them.
Change-Id: I7252572a1a47834f28b6706e45906e2356408e02
Reviewed-on: https://go-review.googlesource.com/c/go/+/350349
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CL 320252 reworked the time docs, but accidentally deleted the format __2
from the sentence describing the three-character day of year component.
Change-Id: I3f583733028657c2a677358a25e062ea81835ce8
GitHub-Last-Rev: 2fa9832419
GitHub-Pull-Request: golang/go#48387
Reviewed-on: https://go-review.googlesource.com/c/go/+/349929
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Carlos Amedee <carlos@golang.org>
If the time is in 'LMT' and has fractional minute, then
`MarshalBinary()` and `UnmarshalBinary()` will encode/decode the time
in `timeBinaryVersionV2` in which the fractional minute is at
bit 15 and 16, and presented in seconds.
Fixes#39616
Change-Id: Ib762fb5fa26f54b1a8377a5dde0b994dd5a1236a
GitHub-Last-Rev: 455d7a2496
GitHub-Pull-Request: golang/go#40293
Reviewed-on: https://go-review.googlesource.com/c/go/+/243402
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This also requires that we sometimes delay transformSelect(), if the
assignments in the Comm part of the select have not been transformed.
Fixes#48137
Change-Id: I163aa1f999d1e63616280dca807561b12b2aa779
Reviewed-on: https://go-review.googlesource.com/c/go/+/347915
Trust: Dan Scales <danscales@google.com>
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Reviewed-by: Keith Randall <khr@golang.org>
For certain type of method wrappers we used to generate a tail
call. That was disabled in CL 307234 when register ABI is used,
because with the current IR it was difficult to generate a tail
call with the arguments in the right places. The problem was that
the IR does not contain a CALL-like node with arguments; instead,
it contains an OAS node that adjusts the receiver, than an
OTAILCALL node that just contains the target, but no argument
(with the assumption that the OAS node will put the adjusted
receiver in the right place). With register ABI, putting
arguments in registers are done in SSA. The assignment (OAS)
doesn't put the receiver in register.
This CL changes the IR of a tail call to take an actual OCALL
node. Specifically, a tail call is represented as
OTAILCALL (OCALL target args...)
This way, the call target and args are connected through the OCALL
node. So the call can be analyzed in SSA and the args can be passed
in the right places.
(Alternatively, we could have OTAILCALL node directly take the
target and the args, without the OCALL node. Using an OCALL node is
convenient as there are existing code that processes OCALL nodes
which do not need to be changed. Also, a tail call is similar to
ORETURN (OCALL target args...), except it doesn't preserve the
frame. I did the former but I'm open to change.)
The SSA representation is similar. Previously, the IR lowers to
a Store the receiver then a BlockRetJmp which jumps to the target
(without putting the arg in register). Now we use a TailCall op,
which takes the target and the args. The call expansion pass and
the register allocator handles TailCall pretty much like a
StaticCall, and it will do the right ABI analysis and put the args
in the right places. (Args other than the receiver are already in
the right places. For register args it generates no code for them.
For stack args currently it generates a self copy. I'll work on
optimize that out.) BlockRetJmp is still used, signaling it is a
tail call. The actual call is made in the TailCall op so
BlockRetJmp generates no code (we could use BlockExit if we like).
This slightly reduces binary size:
old new
cmd/go 14003088 13953936
cmd/link 6275552 6271456
Change-Id: I2d16d8d419fe1f17554916d317427383e17e27f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/350145
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Change so that the Init and Def fields of assignments and OSELREVC2
nodes are exported/imported properly.
A quirk of iimport.go is that it automatically converts an ODCL node to
an ODCL/OAS sequence (where the OAS is to just zero out the declared
variable). Given that the Inits are properly fixed, o.stmt needs
adjustment for the OSELRECV2 case to skip over the new OAS nodes that
are inserted only on re-import.
Change-Id: Ic38017efca4b7ca9b3952ffbbfca067380902b7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/350809
Run-TryBot: Dan Scales <danscales@google.com>
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CL 349412 introduced a bug when Checker.subst does not return a new
signature: we were still setting the receiver to the instantiated type.
I'm not sure how this could manifest in practice (other than confusing
object strings). It's possible that I could generate a testdata-driven
test for this, but in the interest of time I just added a test to verify
object strings.
Change-Id: I29bc8e1419ddc4574755c3def52d18cb71c738eb
Reviewed-on: https://go-review.googlesource.com/c/go/+/350143
Trust: Robert Findley <rfindley@google.com>
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GOAMD64 is for GOARCH=amd64. Fix the GOAMD64 environment variable docs
introduced by CL 349595.
Change-Id: I794990ebe2e306d21ed275446fc52373bfe4ae7d
Reviewed-on: https://go-review.googlesource.com/c/go/+/350534
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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Most architectures currently already implement Pipe using the pipe2
syscall. Only 386, amd64 and mips{,le} still use the pipe syscall.
However, some systems (e.g. Android seccomp policies) block that
syscall, see #40828 for an example.
The pipe2 syscall was added in Linux kernel version 2.6.27. The minimum
required Linux kernel version for Go 1.18 will be changed to 2.6.32
per #45964 so it is possible to unify the implementation of Pipe using
the pipe2 syscall.
For #45964
Change-Id: I8ed6a391300c95f3107b4ec6b27d320e42fb535b
Reviewed-on: https://go-review.googlesource.com/c/go/+/350530
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CL 210639 moved the //sysnb for Setreuid from syscall_linux_$GOARCH.go
to syscall_linux.go but forgot to remove the comment from
syscall_linux_arm64.go which leads to Setreuid being generated twice for
linux/arm64. Remove that //sysnb comment to avoid this.
Change-Id: I2c8ad95f786530ca964685b0a4fe463c64764307
Reviewed-on: https://go-review.googlesource.com/c/go/+/350531
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There are a bunch of nodes beside ONAME and OTYPE, (such as OSTRUCTLIT
and OCOMPLIT) which can introduce a generic type that we need to mark.
So, just mark any generic type on any node in markInlBody. In this
particular issue, the type is introduced by an OSTRUCTLIT node.
Updates #48337
Change-Id: I271932518f0c1fb54d91a603e01a855c69df631d
Reviewed-on: https://go-review.googlesource.com/c/go/+/349909
Trust: Dan Scales <danscales@google.com>
Trust: Carlos Amedee <carlos@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Fixes#48066
Change-Id: Icd6974dfcc496c054bb096e5d70de6e135984517
Reviewed-on: https://go-review.googlesource.com/c/go/+/349774
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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This test is fragile and is starting to impede others' work. This CL
disables it until I have time to either find a solution for the issues
or decide to just delete the test altogether.
Change-Id: Icefabb6d3fbedec5d16536de78be4ca20d63133c
Reviewed-on: https://go-review.googlesource.com/c/go/+/350729
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
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The C code that is calling crosscall1 may depend on the GP register, which Go code
will currently clobber. Save and restore both X3 (aka GP) and X4 (aka TP) in this
code path (note that the Go code does not currently clobber X4, however there is
minimal downside to saving and restoring it here, which then also matches crosscall2).
Updates #47100
Change-Id: Icbb706d7889d5dc59de3efb2b510fa6ea2069496
Reviewed-on: https://go-review.googlesource.com/c/go/+/334870
Trust: Joel Sing <joel@sing.id.au>
Trust: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Meng Zhuo <mzh@golangcn.org>
golang.org/cl/344929 broke the minimal functionality that the python
pretty printer for GDB had, this change restores it to its status prior
to that CL.
Change-Id: I4c7141d4ff726d224a074ecc533d0f896fc0052c
Reviewed-on: https://go-review.googlesource.com/c/go/+/350529
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Ensure that rs2 is none for various instruction encodings. Fix a couple of cases
where it should have been but is not.
Change-Id: I9f8211a0257e49643dbbc89e158e048050ebe6f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/349649
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If NoInheritHandles is passed, then we shouldn't attempt to do anything
with handle lists. Otherwise CreateProcess fails with invalid param,
because it's being told both to not inherit handles and to inherit
certain handles.
This commit fixes that by using the same logic for handle lists as it
does for enabling or disabling handle inheritance. It also adds a test
to make sure this doesn't regress again.
Fixes#48040
Change-Id: I507261baeec263091738ab90157a991d917dc92f
Reviewed-on: https://go-review.googlesource.com/c/go/+/350411
Reviewed-by: Patrik Nyblom <pnyb@google.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
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Change-Id: Icbf36e1cd8311b40d18177464e7c41dd8cb1c65b
Reviewed-on: https://go-review.googlesource.com/c/go/+/340350
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Change-Id: I857b0e9aa7d933879239ef7ebc0d1a2812a74c25
Reviewed-on: https://go-review.googlesource.com/c/go/+/343533
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Carlos Amedee <carlos@golang.org>
Fixes#48396
Change-Id: Idd7cb66536ef513806c472d394a929bc271fc26b
Reviewed-on: https://go-review.googlesource.com/c/go/+/350159
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The extra test just confirms that the type-checker internally
agrees with the spec with the (otherwise invisible) type given
to an untyped constant in a specific shift expression.
For #48422.
Change-Id: I6d98045f90bd20b0cc0a96a147bec9701039cb07
Reviewed-on: https://go-review.googlesource.com/c/go/+/350410
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Thanks to @bodar (Github) for finding this.
Fixes#48422.
Change-Id: I031c3d82a02db1d204e2b86b494d89784d37f073
Reviewed-on: https://go-review.googlesource.com/c/go/+/350409
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This is caused by some nodes didn't carry the real line number.
Noder1 wraps these node with ir.ParenExpr. To fix this issue,
wraps this node like what noder1 does.
Change-Id: I212cad09b93b8bf1a7adfad416d229d15711918a
Reviewed-on: https://go-review.googlesource.com/c/go/+/349769
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Arg/Load/Dereference rewriting was not using the best Pos for
translated values. I also investigated whether OpCopy processing
was losing statements, and though they flood the debugging output,
doing the "obvious" thing of moving statement marks from copi-er to
copy-ee actually makes the resulting binary score slightly worse on
statement-boundary measures.
(for -N -l, 0.9994 vs 0.9995 from "nostmt -c sqle.test")
Fixes#47793.
Change-Id: I65cb878d0e5a3ceb5da4ef679020ca5f40e9b02b
Reviewed-on: https://go-review.googlesource.com/c/go/+/344769
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When a LocResults is an empty list, it currently prints as ">".
Make it print "<>".
Change-Id: I0f596791b471d74cd4bbc0059e269708c80592dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/350144
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The variable represents the microarchitecture level for which to compile.
Valid values are v1 (default), v2, v3, v4.
Updates #45453
Change-Id: I095197fc9239d79f98896d7e745e2341354daca4
GitHub-Last-Rev: f83ed17204
GitHub-Pull-Request: golang/go#48359
Reviewed-on: https://go-review.googlesource.com/c/go/+/349595
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Replace `filepath.Split` with `filepath.Dir`. Clean paths before checking whether command line files are in same directory.
Fixes#47392
Change-Id: I259c3024e7670e78833622b02af4710bc4b68b31
GitHub-Last-Rev: c7c4905bb9
GitHub-Pull-Request: golang/go#47412
Reviewed-on: https://go-review.googlesource.com/c/go/+/337629
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Change-Id: I45575afbad364c13b7179ebe3f3dfc4ed9671d2b
Reviewed-on: https://go-review.googlesource.com/c/go/+/336891
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This change refactors some of the code to support skipping a run
of the seed corpus by the go command before runFuzzing occurs.
Previously, the go command would run all seed corpus for all targets
that match the provided `run` argument. This will be redundant when
fuzzing a target. Now, the seed corpus is only run by targets other than
the one that's about to be fuzzed, and the worker handles running and
reporting issues with the seed corpus.
Part of the logic that needed close inspection is what to do if a
failure occurs during a testing-only or coverage-only fail. If the input
is already in the seed corpus, the fuzzing engine shouldn't add it. If
the input is currently in the cache, then it should be written to
testdata. In all cases, if an error occurs, we need to report this to
the user with enough information for them to debug it.
This uncovered some issues with our code when fuzzing without
instrumentation, and when -run=None was provided. There are some logic
fixes in this change, and some small refactors.
Fixesgolang/go#48327Fixesgolang/go#48296
Change-Id: I9ce2be0219c5b09277ddd308df8bc5a46d4558fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/349630
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Now that we are computing the dictionary format on the instantiated
functions, we can remove the early transformation code that was needed
to create the implicit CONVIFACE nodes in the generic function.
Change-Id: I1695484e7d59bccbfb757994f3e40e84288759a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/349614
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Change to computing the dictionary form on each shape-instantiated
function, rather than once on the underlying generic function/method.
The problem with computing the dictionary format on the generic function
is that we had to force early transformations to create all the
needed/implicit CONVIFACE nodes, since many of these nodes cause the
need for a dictionary entry. Also, the dictionary entries needed can
different with different instantiations of the same generic function,
especially depending on whether a type argument is a non-interface or
interface type, or a instantiated type vs. a non-instantiated type.
By computing the dictionary format on the instantiated function, we are
scanning a function where all the transformations have been done to
create implicit CONVFIFACE nodes, and we know the above relevant
information about the type params (which are shapes).
Much of the change is more mechanical changes from typeparams to shapes,
and generic functions/info to instantiated functions/info. Some of the
most important non-mechanical changes are:
- Separated out the dictionary transformations to nodes into a separate
dictPass, since we need to analyze instantiated functions after
stenciling, but before the dictionary transformations.
- Added type param index to shape types, since we need to be able
distinguish type params of an instantiation which are different but
happen to have the same shape.
- Allow the type substituter to work with shapes again (since for the
dictionary entries we need to substitute shape params to the concrete
type args).
- Support types.IdentityStrict() that does strict type comparison (no
special case for shapes). This needed for type substitution,
formatting and creating dictionaries, etc. We can maybe create better
names for this function.
- Add new information to instInfo to contain a mapping from the shape
type params to their instantiated type bound. This is needed when
doing the dictionary transformations related to type bounds.
Change-Id: I1c3ca312c5384f318c4dd7d0858dba9766396ff6
Reviewed-on: https://go-review.googlesource.com/c/go/+/349613
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This changes the ppc64 prologue to avoid clobbering the registers
that could contain incoming argument values. This means preserving
the values in R3 - R10 and R14 - R19 for ppc64.
Instead of modifying R3, R4, R5 and R6 the registers R22, R23, R24
and R25 are used.
The argument registers that could be clobbered by the call to
morestack are saved and restored around that call.
Change-Id: If354c3dc73f2c8537ef4e513e5a4c05d7bd22866
Reviewed-on: https://go-review.googlesource.com/c/go/+/343872
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Because of wrong case of letters, the cpu features flags were not
set properly for amd64.
Fixes#48406.
Change-Id: If19782851670e91fd31d119f4701c47373fa7e71
GitHub-Last-Rev: 91c7321ca4
GitHub-Pull-Request: golang/go#48403
Reviewed-on: https://go-review.googlesource.com/c/go/+/350151
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
A fuzz worker process should exit with fuzzWorkerExitCode (70) if it
encounters an internal error.
This should generally only happen due to an I/O error on the worker
side. I can't think of a way to write a realistic test case for
this. test_fuzz_io_error.txt triggers an I/O error on the coordinator
side, which is similar.
Change-Id: I40d2e9aaf422e5ed925debcf7a152c252c3a6984
Reviewed-on: https://go-review.googlesource.com/c/go/+/349993
Trust: Jay Conrod <jayconrod@google.com>
Trust: Katie Hockman <katie@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
Print the elapsed time as a nicely formatted duration, and
make small adjustments to the command line output while fuzzing.
Fixesgolang/go#48132
Change-Id: Id95f84c0939171a777448c444d9b87d7af26b654
Reviewed-on: https://go-review.googlesource.com/c/go/+/349970
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
If an indirectly required module does not provide any packages needed
to build packages in the main module but is needed to disambiguate
imports, 'go mod tidy' may keep an indirect requirement on that module
to prevent it from being downgraded. This can prevent the introduction
of new ambiguities. This also ensures tidy keeps sums needed to load
all packages.
Fixes#47738
Change-Id: Ib8e33422b95394707894cda7cfbb71a4b111e0ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/344572
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
When emitting the DIE of the instantiation of a generic function also
emit one DW_TAG_typedef_type entry for each dictionary entry in use,
referencing the shape type and having a custom attribute containing the
index inside the dictionary.
When emitting the DIE of variables that have an instantiated parametric
type, instead of referencing the shape type directly go through the
DW_TAG_typedef_type entry emitted for the dictionary entry describing
the real type of the variable.
Change-Id: Ia45d157ecd4c25e2b60300469e43bbb27a663582
Reviewed-on: https://go-review.googlesource.com/c/go/+/344929
Run-TryBot: Alessandro Arzilli <alessandro.arzilli@gmail.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Trust: Dan Scales <danscales@google.com>
Trust: Jeremy Faller <jeremy@golang.org>
Change DWARF generation to tag wrapper functions with the
"DW_AT_trampoline attribute". The intent is that debuggers can pick up
on this attr so as to skip through the wrapper to the eventual target.
DWARF standard allows for a couple of different possible variants of
the trampoline attr; this is the simplest variant (all it tells the
debugger is that the function is a wrapper, doesn't include a
reference to the wrapper routine).
This implementation keys off the WRAPPER LSym attribute, which is set
for method wrappers, ABI wrappers, and a selected set of runtime
assembly routines (ex: "runtime.call32").
Change-Id: Ib53e1bc56c02b86ca3ac5e7da1a541ec262726cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/347352
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Jeremy Faller <jeremy@golang.org>
