This is the first part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
This change makes gc compiler instrument memory accesses when supplied with -b flag.
R=rsc, nigeltao, lvd
CC=golang-dev
https://golang.org/cl/6497074
This change allows the Go build and install tools to
recognize Plan 9 i386 and amd64 binaries.
R=rsc, r, rminnich
CC=golang-dev
https://golang.org/cl/6575064
Also mention that ignoring second blank identifier of range is required by the spec in the code.
Fixes#4173.
R=daniel.morsing, remyoudompheng, r
CC=golang-dev
https://golang.org/cl/6594043
FormatSelections tries to call a nil function value if lw is nil
and the final entry in the selections array is non-nil. Luckily,
this doesn't actually happen in practice since godoc doesn't use
this combination (no line numbers, but with selections).
R=gri
CC=gobot, golang-dev
https://golang.org/cl/6488106
In two cases, registers were allocated too early resulting
in exhausting of available registers when nesting these
operations.
The case of method calls was due to missing cases in igen,
which only makes calls but doesn't allocate a register for
the result.
The case of 8-bit multiplication was due to a wrong order
in register allocation when Ullman numbers were bigger on the
RHS.
Fixes#3907.
Fixes#4156.
R=rsc
CC=golang-dev, remy
https://golang.org/cl/6560054
Low hanging fruit optimization. Will remove an expensive copy if the range variable is an array.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6564052
This CL adds support for the these 7 new instructions to 6a/6l in
preparation of the upcoming CL for AES-NI accelerated crypto/aes:
AESENC, AESENCLAST, AESDEC, AESDECLAST, AESIMC, AESKEYGENASSIST,
and PSHUFD.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5970055
Do not check compiler/linker timestamps for packages that are in the
$GOROOT. Avoids trying to rebuild non-writable standard packages when
timestamps have not been retained on the Go binaries.
Fixes#4106.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6533053
file old_size new_size base@c1ce95068533
bin/go 14717392 6287824 5918236
this huge size difference is due to GC data for runtime.mheap
(NOPTR dataflag is not obeyed).
R=rsc, dave
CC=golang-dev
https://golang.org/cl/6547051
Remove VERSION, which was forcing version to 'devel'.
Old:
$ go version
go version devel
New:
$ go version
go version devel +0a3866d6cc6b Mon Sep 24 20:08:05 2012 -0400
The date and time (and time zone) is that of the most recent commit,
not the time of the build itself. With some effort we could normalize
the zone, but I don't think it's worth the effort (more C coding,
since Mercurial is unhelpful).
R=r, dsymonds
CC=golang-dev
https://golang.org/cl/6569049
The assembly offsets were converted mechanically using
code.google.com/p/rsc/cmd/asmlint. The instruction
changes were done by hand.
Fixes#2188.
R=iant, r, bradfitz, remyoudompheng
CC=golang-dev
https://golang.org/cl/6550058
Was not handling &x.y[0] and &x.y.z correctly where
y is an array or struct-valued field (not a pointer).
R=ken2
CC=golang-dev
https://golang.org/cl/6551059
This CL makes the compiler understand that the type of
the len or cap of a map, slice, or string is 'int', not 'int32'.
It does not change the meaning of int, but it should make
the eventual change of the meaning of int in 6g a bit smoother.
Update #2188.
R=ken, dave, remyoudompheng
CC=golang-dev
https://golang.org/cl/6542059
Use explicit IntSize constant instead of 4.
This CL does not change the meaning of int, but it should make
the eventual change of the meaning of int on amd64 a bit
smoother.
Update #2188.
R=ken, dave
CC=golang-dev
https://golang.org/cl/6554076
This CL makes the size of an int controlled by a variable
in cgo instead of hard-coding 4 (or 32 bits) in various places.
Update #2188.
R=iant, r, dave
CC=golang-dev
https://golang.org/cl/6548061
This CL makes the runtime understand that the type of
the len or cap of a map, slice, or string is 'int', not 'int32',
and it is also careful to distinguish between function arguments
and results of type 'int' vs type 'int32'.
In the runtime, the new typedefs 'intgo' and 'uintgo' refer
to Go int and uint. The C types int and uint continue to be
unavailable (cause intentional compile errors).
This CL does not change the meaning of int, but it should make
the eventual change of the meaning of int on amd64 a bit
smoother.
Update #2188.
R=iant, r, dave, remyoudompheng
CC=golang-dev
https://golang.org/cl/6551067
Using offsets from Tos is cumbersome and we've had problems
in the past. Since it's only being used to grab the PID, we'll just
get that from the default TLS instead.
R=rsc, rminnich, npe
CC=golang-dev
https://golang.org/cl/6543049
Revision 63f7abcae015 introduced a bug caused by
code assuming registers started at X5, not X0.
Fixes#4138.
R=rsc
CC=golang-dev, remy
https://golang.org/cl/6558043
The width was not being set on the address, which meant
that the optimizer could not find variables that overlapped
with it and mark them as having had their address taken.
This let to the compiler believing variables had been set
but never used and then optimizing away the set.
Fixes#4129.
R=ken2
CC=golang-dev
https://golang.org/cl/6552059
OpenBSD now requires ELF binaries to have a PT_NOTE that identifies
it as an OpenBSD binary. Refactor the existing NetBSD ELF signature
code and implement support for OpenBSD ELF signatures.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6489131
Always process the DWARF info, even when the const value is determined
using the debug data block. This ensures that the injected enum is
removed and future loads of the same constant do not trigger
inconsistent definitions.
Add tests for issues 2470 and 4054.
Fixes#4054.
R=golang-dev, fullung, dave, rsc, minux.ma
CC=golang-dev
https://golang.org/cl/6501101
In a range loop, the presence of a value implies the presence of a key.
However, the presence of a value as an *ast.Ident does not imply that
the key is also an *ast.Ident, thus leading to a panic any time the
two argument form is used where the key is not an identifier.
R=golang-dev, adg, r
CC=golang-dev
https://golang.org/cl/6540045
(see also issue 3961).
hexdump -c testdata/crlf.input
0000000 / * \r \n \t S o u r c e c o n t
0000010 a i n i n g C R / L F l i n
0000020 e e n d i n g s . \r \n \t T h e
0000030 g o f m t ' e d o u t p u t
0000040 m u s t o n l y h a v e
0000050 L F \r \n \t l i n e e n d i n g
0000060 s . \r \n * / \r \n p a c k a g e
0000070 m a i n \r \n \r \n f u n c m a i
0000080 n ( ) { \r \n \t / / l i n e
0000090 c o m m e n t \r \n \t p r i n t l
00000a0 n ( " h e l l o , w o r l d !
00000b0 " ) / / a n o t h e r l i
00000c0 n e c o m m e n t \r \n \t p r i
00000d0 n t l n ( ) \r \n } \r \n
00000db
hexdump -c testdata/crlf.golden
0000000 / * \n \t S o u r c e c o n t a
0000010 i n i n g C R / L F l i n e
0000020 e n d i n g s . \n \t T h e g
0000030 o f m t ' e d o u t p u t m
0000040 u s t o n l y h a v e L F
0000050 \n \t l i n e e n d i n g s . \n
0000060 * / \n p a c k a g e m a i n \n
0000070 \n f u n c m a i n ( ) { \n \t
0000080 / / l i n e c o m m e n t \n
0000090 \t p r i n t l n ( " h e l l o ,
00000a0 w o r l d ! " ) / / a n o
00000b0 t h e r l i n e c o m m e n
00000c0 t \n \t p r i n t l n ( ) \n } \n
00000cf
R=rsc
CC=golang-dev
https://golang.org/cl/6526052
We use pkg path instead of file name (which contains $WORK) in section symbols names.
R=golang-dev, fullung, rsc, iant
CC=golang-dev
https://golang.org/cl/6445085
Fixes writing of function parameter, result lists which
consist of multiple named or unnamed items with same type.
Fixes#4011.
R=golang-dev, bsiegert, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/6475062
This is the second part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
This change makes the linker emit dependency on runtime/race package when supplied with -b flag.
R=rsc, minux.ma
CC=golang-dev
https://golang.org/cl/6488074
This is the first part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
Adds -race flag to go command.
API change:
+pkg go/build, type Context struct, InstallTag string
R=rsc
CC=golang-dev
https://golang.org/cl/6488075
This is a part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
This change breaks circular dependency between runtime/race and syscall packages.
R=rsc
CC=golang-dev
https://golang.org/cl/6498079
During interface compare, the operands will be evaluated twice. The operands might include function calls for conversion, so make them cheap before comparing them.
R=rsc
CC=golang-dev
https://golang.org/cl/6498133
Fixes#3456.
This proposal is a reformulation of CL 5987063. This CL resets
the default GOARM value to 6 and allows the use of the VFPv3
optimisation if GOARM=7. Binaries built with this CL in place
will abort if GOARM=7 was used and the target host does not
support VFPv3.
R=minux.ma, rsc, ajstarks
CC=golang-dev
https://golang.org/cl/6501099
In switches without an expression, the compiler would not convert the implicit true to an interface, causing codegen errors.
Fixes#3980.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6497147
This fixes a problem with ELF tools thinking they know the
format of the symbol table, as we do not use any of the
standard formats for that table.
This change will probably annoy the Plan 9 users, but I
believe there are other incompatibilities already that mean
they have to use a Go-specific nm.
Fixes#3473.
R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/6500117
go tool dist env -w is supposed to print a Windows batch file.
Normally Windows will execute batch files without \r before \n,
but issue 3060 reports that if the file ends up containing paths
written in Chinese, Windows 7 cannot execute it without the \r.
So add the \r.
Fixes#3060.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6498120
It is enough to load directly the data word and the itab word
from memory, so we save a LEA instruction for each method call,
and allow elimination of some extra temporaries.
Update #1914.
R=daniel.morsing, rsc
CC=golang-dev, remy
https://golang.org/cl/6501110
Removes an extra LEAL/LEAQ instructions there and usually saves
a useless temporary in the idiom
if err := foo(); err != nil {...}
Generated code is also less involved:
MOVQ err+n(SP), AX
CMPQ AX, $0
(potentially CMPQ n(SP), $0) instead of
LEAQ err+n(SP), AX
CMPQ (AX), $0
Update #1914.
R=daniel.morsing, nigeltao, rsc
CC=golang-dev, remy
https://golang.org/cl/6493099
Broke tests on 386.
««« original CL description
6l/8l: emit correct opcodes to F(SUB|DIV)R?D.
When the destination was not F0, 6l and 8l swapped FSUBD/FSUBRD and
FDIVD/FDIVRD.
R=golang-dev, dave, rsc
CC=golang-dev
https://golang.org/cl/6498092
»»»
R=golang-dev
CC=golang-dev
https://golang.org/cl/6492100
The main case where it happens is when evaluating &s[i] without
bounds checking, which usually happens during range loops (i=0).
This allows registerization of the corresponding variables,
saving 16 bytes of stack frame for each such range loop and a
LEAQ instruction.
R=golang-dev, rsc, dave
CC=golang-dev, remy
https://golang.org/cl/6497073
When generating enums use the debug data section instead of the
DWARF debug info, if it is available in the ELF file. This allows
mkerrors.sh to work correctly on OpenBSD/386 and NetBSD/386.
Fixes#2470.
R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/6495090
The parser depends on it but the client might not import it, so make sure it's there.
Fixes#4038.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6497094
Accomplished by synchronizing the formatting of conversion errors between typecheck.c and subr.c
Fixes#3984.
R=golang-dev, remyoudompheng, rsc
CC=golang-dev
https://golang.org/cl/6500064
There was mail on golang-nuts a few weeks ago
from someone who understood the message perfectly
and knew he had a cyclic dependency but assumed
that Go, like Python or Java, was supposed to handle it.
R=golang-dev, bradfitz, dave
CC=golang-dev
https://golang.org/cl/6488069
This set of changes extends the Plan 9 support
to include the AMD64 architecture and should
work on all versions of Plan 9.
R=golang-dev, rminnich, noah.evans, rsc, minux.ma, npe
CC=akskuma, golang-dev, jfflore, noah.evans
https://golang.org/cl/6479052
This fixes a spurious 'invalid recursive type' error, and stops the compiler from emitting errors on uses of the invalid type.
Fixes#3766.
R=golang-dev, dave, minux.ma, rsc
CC=golang-dev
https://golang.org/cl/6443100
In the example "units" program for goyacc, the exchange rates were
reciprocals of the correct amounts. Turn them right-side-up
and update them to current figures.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6495053
CVTSS2SQ's rounding mode is controlled by the RC field of MXCSR;
as we specifically need truncate semantic, we should use CVTTSS2SQ.
Fixes#3804.
R=rsc, r
CC=golang-dev
https://golang.org/cl/6352079
To make it more compliant.
This won't affect the behavior of running on OABI-only kernels.
R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/6475044
NetBSD's built-in linker script for 'ld -r' does not provide a
SEARCH_DIR. As a result libgcc.a is not found when -lgcc is used.
Work around this by determining the path to libgcc (by invoking
gcc with the -print-libgcc-file-name option) and explicitly
referencing the resulting library.
R=golang-dev, iant, aram, lucio.dere, minux.ma
CC=golang-dev
https://golang.org/cl/6470044
The last fix was wrong w.r.t C's operator precedence,
and it also failed to really skip the NONE relocation.
The offending R_386_NONE relocation is a absolute
relocation in section .eh_frame.
TBR=golang-dev
CC=golang-dev
https://golang.org/cl/6463058
- pprof is a perl script, so go command should invoke
perl instead of trying to run pprof directly;
- pprof should use "go tool nm" unconditionally on windows,
no one else can extract symbols from Go program;
- pprof should use "go tool nm" instead of "6nm".
Fixes#3879.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6445082
This CL adds a step to the build procedure for cgo programs. It uses 'ld -r'
to combine all gcc compiled object file and generate a relocatable object file
for our ld. Additionally, this linking step will combine some static linking
gcc library into the relocatable object file, so that we can use libgcc,
libmingwex and libmingw32 without problem.
Fixes#3261.
Fixes#1741.
Added a testcase for linking in libgcc.
TODO:
1. still need to fix the INDIRECT_SYMBOL_LOCAL problem on Darwin/386.
2. still need to enable the libgcc test on Linux/ARM, because 5l can't deal
with thumb libgcc.
Tested on Darwin/amd64, Darwin/386, FreeBSD/amd64, FreeBSD/386, Linux/amd64,
Linux/386, Linux/ARM, Windows/amd64, Windows/386
R=iant, rsc, bradfitz, coldredlemur
CC=golang-dev
https://golang.org/cl/5822049
Although I don't use PAX enabled ARM kernels, PAX
does have support for ARM, so we're better off add
PT_PAX_FLAGS now in case people use PAX kernels.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6453092
I have C functions implemented in .syso file (rather than .so or inlined in .go file).
W/o this change the gcc invocation fails with undefined symbols.
R=minux.ma, rsc
CC=golang-dev
https://golang.org/cl/6352076
The compiler is incorrectly rejecting switches on arrays of
comparable types. It also doesn't catch incomparable structs
when typechecking the switch, leading to unreadable errors
during typechecking of the generated code.
Fixes#3894.
R=rsc
CC=gobot, golang-dev, r, remy
https://golang.org/cl/6442074
PAX systems are Linux systems that are more paranoid about memory permissions.
These flags tell them to relax when running Go binaries.
Fixes#47.
R=iant
CC=golang-dev
https://golang.org/cl/6326054
The receive operator was given incorrect precedence
resulting in incorrect deletion of parentheses.
Fixes#3843.
R=rsc
CC=golang-dev, remy
https://golang.org/cl/6442049
LLVM-based gcc will place all-zero data in a zero-filled
section, but our debug/macho can't handle that.
Fixes#3821.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6444049
They were previously ignored when deciding order and
detecting dependency loops.
Fixes#3824.
R=rsc, golang-dev
CC=golang-dev, remy
https://golang.org/cl/6455055
Declare crosscall2. Declare the functions passed to it as
returning void, rather than relying on implicit return type.
R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/6432060
By default, all are still run, but a particular test can be
selected with the new flags.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6395053
The error was caused by a call to implements() even when
the type switch variable was not an interface.
Fixes#3786.
R=golang-dev, r
CC=golang-dev, remy
https://golang.org/cl/6354102
Made the following changes:
- Export errprintf() from all three OS-specific modules
- Added errprintf() to a.h
- Moved errprintf() in windows.c under xprintf(), since they are so similar
- Replaced all instances of xprintf() with errprintf() where a vflag check is done
Fixes#3788.
R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/6346056
There may be further savings if convT2I can avoid the function call
if the cache is good and T is uintptr-shaped, a la convT2E, but that
will be a follow-up CL.
src/pkg/runtime:
benchmark old ns/op new ns/op delta
BenchmarkConvT2ISmall 43 15 -64.01%
BenchmarkConvT2IUintptr 45 14 -67.48%
BenchmarkConvT2ILarge 130 101 -22.31%
test/bench/go1:
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 8588997000 8499058000 -1.05%
BenchmarkFannkuch11 5300392000 5358093000 +1.09%
BenchmarkGobDecode 30295580 31040190 +2.46%
BenchmarkGobEncode 18102070 17675650 -2.36%
BenchmarkGzip 774191400 771591400 -0.34%
BenchmarkGunzip 245915100 247464100 +0.63%
BenchmarkJSONEncode 123577000 121423050 -1.74%
BenchmarkJSONDecode 451969800 596256200 +31.92%
BenchmarkMandelbrot200 10060050 10072880 +0.13%
BenchmarkParse 10989840 11037710 +0.44%
BenchmarkRevcomp 1782666000 1716864000 -3.69%
BenchmarkTemplate 798286600 723234400 -9.40%
R=rsc, bradfitz, go.peter.90, daniel.morsing, dave, uriel
CC=golang-dev
https://golang.org/cl/6337058
Generating env.bat using dist env -wp > env.bat failed silently
if case of an error, because the message was redirected to env.bat.
Verbose messages still go to stdout, causing problems, but that's
a seperate change.
Made errprintf() identical to xprintf(), except for the output handle.
Yes, it's duplicate code, but most of the function is unpacking
the argument list and preparing it for WriteFile(), which has to be
done anyway.
R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/6343047
This is a new, not yet committed API.
- Changed NewCommentMap to be independent of
*File nodes and more symmetric with the
Filter and Comments methods.
- Implemented Update method for use in
AST modifications.
- Implemented String method for debugging
R=rsc
CC=golang-dev
https://golang.org/cl/6303086
Fixes#3708.
The fix to allow 5{c,g,l} to compile under clang 3.1 broke cross
compilation on darwin using the Apple default compiler on 10.7.3.
This failure was introduced in 9b455eb64690.
This has been tested by cross compiling on darwin/amd64 to linux/arm using
* gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)
* clang version 3.1 (branches/release_31)
As well as on linux/arm using
* gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
* Ubuntu clang version 3.0-6ubuntu3 (tags/RELEASE_30/final) (based on LLVM 3.0)
* Debian clang version 3.1-4 (branches/release_31) (based on LLVM 3.1)
R=consalus, rsc
CC=golang-dev
https://golang.org/cl/6307058
The type declarations were being generated using
a range over a map, which meant that successive
runs produced different orders. This will make sure
successive runs produce the same files.
Fixes#3707.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6300062
If there are mutually recursive functions, there is a cycle in
the dependency graph, so the order is actually dependency order
among the strongly connected components: mutually recursive
functions get put into the same batch and analyzed together.
(Until now the entire package was put in one batch.)
The non-recursive case (single function, maybe with some
closures inside) will be able to be more precise about inputs
that escape only back to outputs, but that is not implemented yet.
R=ken2
CC=golang-dev, lvd
https://golang.org/cl/6304050
CL 4313064 fixed its test case but did not address a
general enough problem:
type T1 struct { F *T2 }
type T2 T1
type T3 T2
could still end up copying the definition of T1 for T2
before T1 was done being evaluated, or T3 before T2
was done.
In order to propagate the updates correctly,
record a copy of an incomplete type for re-execution
once the type is completed. Roll back CL 4313064.
Fixes#3709.
R=ken2
CC=golang-dev, lstoakes
https://golang.org/cl/6301059
The original implementation of closures created the
underlying top-level function during walk, which is fairly
late in the compilation process and caused ordering-based
complications due to earlier stages that had to be repeated
any number of times.
Create the underlying function during typecheck, much
earlier, so that later stages can be run just once.
The result is a simpler compilation sequence.
R=ken2
CC=golang-dev
https://golang.org/cl/6279049
It's very unfortunate that the type of Data field of struct
RawSockaddr is [14]uint8 on Linux/ARM instead of [14]int8
on all the others.
btw, it should be [14]int8 according to my header files.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6275050
Now that gri has made go/parser 15% faster, I offer this
change to slow back down cmd/api ~proportionately, adding
FreeBSD to the go1-checked set of platforms.
Really we should have done this earlier. This will prevent us
from breaking FreeBSD compatibility accidentally in the
future.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6279044
Saving the code in case we improve things enough that
it matters later, but at least right now it is not worth doing.
R=ken2
CC=golang-dev
https://golang.org/cl/6248071
Drop expecttaken function in favor of extra argument
to gbranch and bgen. Mark loop condition as likely to
be true, so that loops are generated inline.
The main benefit here is contiguous code when trying
to read the generated assembly. It has only minor effects
on the timing, and they mostly cancel the minor effects
that aligning function entry points had. One exception:
both changes made Fannkuch faster.
Compared to before CL 6244066 (before aligned functions)
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 4222117400 4201958800 -0.48%
BenchmarkFannkuch11 3462631800 3215908600 -7.13%
BenchmarkGobDecode 20887622 20899164 +0.06%
BenchmarkGobEncode 9548772 9439083 -1.15%
BenchmarkGzip 151687 152060 +0.25%
BenchmarkGunzip 8742 8711 -0.35%
BenchmarkJSONEncode 62730560 62686700 -0.07%
BenchmarkJSONDecode 252569180 252368960 -0.08%
BenchmarkMandelbrot200 5267599 5252531 -0.29%
BenchmarkRevcomp25M 980813500 985248400 +0.45%
BenchmarkTemplate 361259100 357414680 -1.06%
Compared to tip (aligned functions):
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 4140739800 4201958800 +1.48%
BenchmarkFannkuch11 3259914400 3215908600 -1.35%
BenchmarkGobDecode 20620222 20899164 +1.35%
BenchmarkGobEncode 9384886 9439083 +0.58%
BenchmarkGzip 150333 152060 +1.15%
BenchmarkGunzip 8741 8711 -0.34%
BenchmarkJSONEncode 65210990 62686700 -3.87%
BenchmarkJSONDecode 249394860 252368960 +1.19%
BenchmarkMandelbrot200 5273394 5252531 -0.40%
BenchmarkRevcomp25M 996013800 985248400 -1.08%
BenchmarkTemplate 360620840 357414680 -0.89%
R=ken2
CC=golang-dev
https://golang.org/cl/6245069
On 6l and 8l, this is a real instruction, guaranteed to
cause an 'undefined instruction' exception.
On 5l, we simulate it as BL to address 0.
The plan is to use it as a signal to the linker that this
point in the instruction stream cannot be reached
(hence the changes to nofollow). This will help the
compiler explain that panicindex and friends do not
return without having to put a list of these functions
in the linker.
R=ken2
CC=golang-dev
https://golang.org/cl/6255064
16 seems pretty standard on x86 for function entry.
I don't know if ARM would benefit, so I used just 4
(single instruction alignment).
This has a minor absolute effect on the current timings.
The main hope is that it will make them more consistent from
run to run.
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 4222117400 4140739800 -1.93%
BenchmarkFannkuch11 3462631800 3259914400 -5.85%
BenchmarkGobDecode 20887622 20620222 -1.28%
BenchmarkGobEncode 9548772 9384886 -1.72%
BenchmarkGzip 151687 150333 -0.89%
BenchmarkGunzip 8742 8741 -0.01%
BenchmarkJSONEncode 62730560 65210990 +3.95%
BenchmarkJSONDecode 252569180 249394860 -1.26%
BenchmarkMandelbrot200 5267599 5273394 +0.11%
BenchmarkRevcomp25M 980813500 996013800 +1.55%
BenchmarkTemplate 361259100 360620840 -0.18%
R=ken2
CC=golang-dev
https://golang.org/cl/6244066
The code was inconsistent about when it used
brchain(x) and when it used x directly, with the result
that you could end up emitting code for brchain(x) but
leave the jump pointing at an unemitted x.
R=ken2
CC=golang-dev
https://golang.org/cl/6250077
On NetBSD a cgo enabled binary has more than 32 sections - bump NSECTS
so that we can actually link them successfully.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6261052
It's sad to introduce a new macro, but rnd shows up consistently
in profiles, and the function call overwhelms the two arithmetic
instructions it performs.
R=r
CC=golang-dev
https://golang.org/cl/6260051
Plan 9 versions for amd64 have 2 megabyte pages.
This also fixes the logic for 32-bit vs 64-bit Plan 9,
making 64-bit the default, and adds logic to generate
a symbols table.
R=golang-dev, rsc, rminnich, ality, 0intro
CC=golang-dev, john
https://golang.org/cl/6218046
The old code generated for a bounds check was
CMP
JLT ok
CALL panicindex
ok:
...
The new code is (once the linker finishes with it):
CMP
JGE panic
...
panic:
CALL panicindex
which moves the calls out of line, putting more useful
code in each cache line. This matters especially in tight
loops, such as in Fannkuch. The benefit is more modest
elsewhere, but real.
From test/bench/go1, amd64:
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 6096092000 6088808000 -0.12%
BenchmarkFannkuch11 6151404000 4020463000 -34.64%
BenchmarkGobDecode 28990050 28894630 -0.33%
BenchmarkGobEncode 12406310 12136730 -2.17%
BenchmarkGzip 179923 179903 -0.01%
BenchmarkGunzip 11219 11130 -0.79%
BenchmarkJSONEncode 86429350 86515900 +0.10%
BenchmarkJSONDecode 334593800 315728400 -5.64%
BenchmarkRevcomp25M 1219763000 1180767000 -3.20%
BenchmarkTemplate 492947600 483646800 -1.89%
And 386:
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 6354902000 6243000000 -1.76%
BenchmarkFannkuch11 8043769000 7326965000 -8.91%
BenchmarkGobDecode 19010800 18941230 -0.37%
BenchmarkGobEncode 14077500 13792460 -2.02%
BenchmarkGzip 194087 193619 -0.24%
BenchmarkGunzip 12495 12457 -0.30%
BenchmarkJSONEncode 125636400 125451400 -0.15%
BenchmarkJSONDecode 696648600 685032800 -1.67%
BenchmarkRevcomp25M 2058088000 2052545000 -0.27%
BenchmarkTemplate 602140000 589876800 -2.04%
To implement this, two new instruction forms:
JLT target // same as always
JLT $0, target // branch expected not taken
JLT $1, target // branch expected taken
The linker could also emit the prediction prefixes, but it
does not: expected taken branches are reversed so that the
expected case is not taken (as in example above), and
the default expectaton for such a jump is not taken
already.
R=golang-dev, gri, r, dave
CC=golang-dev
https://golang.org/cl/6248049
for expr1, expr2 = range slice
was assigning to expr1 and expr2 in sequence
instead of in parallel. Now it assigns in parallel,
as it should. This matters for things like
for i, x[i] = range slice.
Fixes#3464.
R=ken2
CC=golang-dev
https://golang.org/cl/6252048
* Eliminate bounds check on known small shifts.
* Rewrite x<<s | x>>(32-s) as a rotate (constant s).
* More aggressive (but still minimal) range analysis.
R=ken, dave, iant
CC=golang-dev
https://golang.org/cl/6209077
- interface methods appeared under VarDecl in search results
(long-standing TODO)
- don't walk parts of AST which contain no indexable material
(minor performance tuning)
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6228047
* Shift/rotate by constant doesn't have to stop subprop. (also in 8g)
* Remove redundant MOVLQZX instructions.
* An attempt at issuing loads early.
Good for 0.5% on a good day, might not be worth keeping.
Need to understand more about whether the x86
looks ahead to what loads might be coming up.
R=ken2, ken
CC=golang-dev
https://golang.org/cl/6203091
I needed this to explore per-GOOS/GOARCH differences in pkg
syscall for a recent CL. Others may find it useful too.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6236046
CL 5823055 removed a line introduced in Linux/ARM cgo support.
Because readsym() now returns nil for "$a", "$d" mapping symbols,
no matter the settings of `needSym', we still have to guard against
them in ldelf().
R=golang-dev, dave, rsc
CC=golang-dev
https://golang.org/cl/6220073
This quiets all.bash noise for upcoming features we know about.
The all.bash warnings will now only print for things not in next.txt
(or in next.txt but not in the API).
Once an API is frozen, we rename next.txt to a new frozen file
(like go1.txt)
Fixes#3651
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6218069
Introduce a newsym() to cmd/lib.c to add a symbol but don't add
them to hash table.
Introduce a new bit flag SHIDDEN and bit mask SMASK to handle hidden
and/or local symbols in ELF symbol tables. Though we still need to order
the symbol table entries correctly.
Fix for issue 3261 comment #9.
For CL 5822049.
R=iant, rsc
CC=golang-dev
https://golang.org/cl/5823055
ld -r could generate multiple section symbols for the same section,
but with different values, we have to take that into account.
Fixes#3322.
Part of issue 3261.
For CL 5822049.
R=golang-dev, iant, rsc, iant
CC=golang-dev
https://golang.org/cl/5823059
Before:
./x.go:6: first argument to append must be slice; have nil
After:
./x.go:6: first argument to append must be typed slice; have untyped nil
Fixes#3616.
R=ken2
CC=golang-dev
https://golang.org/cl/6209067
go help remote used to reference "go help importpath", which has
changed to "go help packages".
Fixes#3598.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6201065
Tested manually.
Fixes#3554.
Before:
$ cd $GOROOT/src/pkg
$ go list io
io
$ go list io/...
io
io/ioutil
$ cd $GOROOT/src/pkg/io
$ go list .
io
$ go list ./...
io/ioutil
After:
$ cd $GOROOT/src/pkg
$ go list io
io
$ go list io/...
io
io/ioutil
$ cd $GOROOT/src/pkg/io
$ go list .
io
$ go list ./...
io
io/ioutil
$ go list ././...
io
io/ioutil
$ go list ././.././io/...
io
io/ioutil
$ go list ../image
image
$ go list ../image/...
image
image/color
image/draw
image/gif
image/jpeg
image/png
$ go list ../.../template
html/template
text/template
$ cd $GOROOT/src/pkg
$ go list ./io
io
$ go list ./io/...
io
io/ioutil
$ go list ./.../pprof
net/http/pprof
runtime/pprof
$ go list ./compress
can't load package: package compress: no Go source files in /home/nigeltao/go/src/pkg/compress
$ go list ./compress/...
compress/bzip2
compress/flate
compress/gzip
compress/lzw
compress/zlib
$ cd $GOROOT/src/pkg/code.google.com
$ go list ./p/leveldb-go/...
code.google.com/p/leveldb-go/leveldb
code.google.com/p/leveldb-go/leveldb/crc
code.google.com/p/leveldb-go/leveldb/db
code.google.com/p/leveldb-go/leveldb/memdb
code.google.com/p/leveldb-go/leveldb/memfs
code.google.com/p/leveldb-go/leveldb/record
code.google.com/p/leveldb-go/leveldb/table
code.google.com/p/leveldb-go/manualtest/filelock
$ go list ./p/.../truetype
code.google.com/p/freetype-go/example/truetype
code.google.com/p/freetype-go/freetype/truetype
$ go list ./p/.../example
warning: "./p/.../example" matched no packages
$ go list ./p/.../example/...
code.google.com/p/freetype-go/example/freetype
code.google.com/p/freetype-go/example/gamma
code.google.com/p/freetype-go/example/raster
code.google.com/p/freetype-go/example/round
code.google.com/p/freetype-go/example/truetype
code.google.com/p/x-go-binding/example/imgview
code.google.com/p/x-go-binding/example/xgb
R=rsc
CC=golang-dev
https://golang.org/cl/6194056
Some newer Linux distributions (Ubuntu ARM at least) use a new multiarch
directory organization, where dynamic linker is no longer in the hardcoded
path in our linker.
For example, Ubuntu 12.04 ARM hardfloat places its dynamic linker at
/lib/arm-linux-gnueabihf/ld-linux.so.3
Ref: http://lackof.org/taggart/hacking/multiarch/
Also, to support Debian GNU/kFreeBSD as a FreeBSD variant, we need this capability, so it's part of issue 3533.
This CL add a new pragma (#pragma dynlinker "path") to cc.
R=iant, rsc
CC=golang-dev
https://golang.org/cl/6086043
Part 1 of CL 5601044 (cgo: Linux/ARM support)
Limitation: doesn't support thumb library yet.
R=golang-dev, dave, rsc
CC=golang-dev
https://golang.org/cl/5991065
This makes it possible to inline the prefetch of upcoming
memory addresses during garbage collection, instead of
needing to flush registers, make a function call, and
reload registers. On garbage collection-heavy workloads,
this results in a 5% speedup.
Fixes#3493.
R=dvyukov, ken, r, dave
CC=golang-dev
https://golang.org/cl/5990066
The new logic is "use go1 if it's there, otherwise no tag."
Nothing needs to say "I require go1.0.1", and I want to
preserve some flexibility in defining what tags mean.
Right now (before go1.0.1) there is only one possible tag,
"go1", and I'd like to keep it that way.
R=golang-dev, bradfitz, r, adg
CC=golang-dev
https://golang.org/cl/6112060
As in:
const format = "%s"
fmt.Printf(format, "hi")
Also fix a couple of bugs by rewriting the routine.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6099057
This leads to ~30kB improvement on code size for ARM machines with VFP/NEON.
Example: go test -c math
GOARM=5 GOARM=6
Old: 1884200 1839144
New: 1884165 1805245
-: 35 33899
R=rsc, bradfitz, dave, kai.backman
CC=golang-dev
https://golang.org/cl/5975060
Without an explicit signal for a truncation, copy propagation
will sometimes propagate a 32-bit truncation and end up
overwriting uses of the original 64-bit value.
The case that arose in practice is in C but I believe
that the same could plausibly happen in Go.
The main reason we didn't run into the same in Go
is that I (perhaps incorrectly?) drop MOVL AX, AX
during gins, so the truncation was never generated, so
it didn't confuse the optimizer.
Fixes#1315.
Fixes#3488.
R=ken2
CC=golang-dev
https://golang.org/cl/6002043
Assignment of a computed uint64 value to an
address derived with a function call was executing
the call after computing the value, which trashed
the value (held in registers).
long long *f(void) { return 0; }
void g(int x, int y) {
*f() = (long long)x | (long long)y<<32;
}
Before:
(x.c:3) TEXT g+0(SB),(gok(71))
...
(x.c:4) ORL AX,DX
(x.c:4) ORL CX,BX
(x.c:4) CALL ,f+0(SB)
(x.c:4) MOVL DX,(AX)
(x.c:4) MOVL BX,4(AX)
After:
(x.c:3) TEXT g+0(SB),(gok(71))
(x.c:4) CALL ,f+0(SB)
...
(x.c:4) ORL CX,BX
(x.c:4) ORL DX,BP
(x.c:4) MOVL BX,(AX)
(x.c:4) MOVL BP,4(AX)
Fixes#3501.
R=ken2
CC=golang-dev
https://golang.org/cl/5998043
On windows Mercurial installed with easy_install typically creates
an hg.bat batch file in Python Scripts directory, which cannot be used
with CreateProcess unless full path is specified. Work around by
launching hg via cmd.exe /c.
Additionally, fix a rare FormatMessageW crash.
Fixes#3093.
R=golang-dev, rsc, alex.brainman, aram, jdpoirier, mattn.jp
CC=golang-dev
https://golang.org/cl/5937043
Before, "go get -v foo/bar" was assuming "foo" was a hostname
and trying to perform discovery on it. Now, require a dot in
the first path component (the hostname).
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5981057
"go1" dominates. Delete the text about weekly and release.
We can revisit this once the situation changes.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5969043
Another attempt at https://golang.org/cl/5754088.
Before, we only consulted $GOBIN for source code
found in $GOROOT, but that's confusing to explain
and less useful. The new behavior lets users set
GOBIN=$HOME/bin and have all go-compiled binaries
installed there.
Tested a few cases in test.bash.
Ran all.bash with and without $GOBIN and it works.
Even so, I expect it to break the builders,
like it did last time, we can debug from there.
Fixes#3269 (again).
Fixes#3396.
Fixes#3397.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5927051
Issue 3207 was caused by setting GOPATH=GOROOT.
This is a common mistake, so diagnose it at command start
and also correct the bug that it caused in get (downloading
to GOROOT/src/foo instead of GOROOT/src/pkg/foo).
Issue 3268 was caused by recognizing 'packages' that
had installed binaries but no source. This behavior is not
documented and causes trouble, so remove it. We can
revisit the concept of binary-only packages after Go 1.
Fixes#3207.
Fixes#3268.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5930044
In a browser with many open tabs, the tab titles become short
and uninformative because they all start with the same prefix
("Package ", "Directory ", etc.).
Permit use of shorter tab titles that start with the relevant
information first.
Fixes#3365.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5865056
The two optimizations for small structs and arrays
were missing the implicit cast from ideal bool.
Fixes#3351.
R=rsc, lvd
CC=golang-dev
https://golang.org/cl/5848062
Adds new file api/go1.txt, locking down the current API.
Any changes to the API will need to update that file.
run.bash (but not make.bash, or Windows) will check for
accidental API changes.
R=golang-dev, dsymonds, rsc
CC=golang-dev
https://golang.org/cl/5820070
This makes the last error-reporting CL a bit less
aggressive. errPrintedOutput is a sentinel value
that should not be wrapped.
R=gri
CC=golang-dev
https://golang.org/cl/5845052
Fixes part of issue 3253.
We still need to support scattered relocations though.
R=golang-dev, bsiegert, rsc, iant
CC=golang-dev
https://golang.org/cl/5822050
windows cmd.exe can't show utf-8 correctly basically.
chcp 65001 may make it show, but most people don't have fonts which can
show it.
R=golang-dev, rsc, adg, gri, r
CC=golang-dev
https://golang.org/cl/5820060
A "gccgoprefix" flag is added and used by the go tool,
to mirror the -fgo-prefix flag for gccgo, whose value
is required to know how to access functions from C.
Trying to export Go methods or unexported Go functions
will not work.
Also fix go test on "main" packages.
Updates #2313.
Fixes#3262.
R=mpimenov, rsc, iant
CC=golang-dev
https://golang.org/cl/5797046
Fixes#3324.
Robert suggested not reporting errors until the end of the output.
which I'd also like to do, but errPrintedOutput makes that a bigger
change than I want to do before Go 1. This change should at least
remove the confusion we had.
# Building packages and commands for linux/amd64.
runtime
errors
sync/atomic
unicode
unicode/utf8
math
sync
unicode/utf16
crypto/subtle
io
syscall
hash
crypto
crypto/md5
hash/crc32
crypto/cipher
crypto/hmac
crypto/sha1
go install unicode: copying /tmp/go-build816525784/unicode.a to /home/rsc/g/go/pkg/linux_amd64/unicode.a: short write
hash/adler32
container/list
container/ring
...
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5837054
A node spans multiple lines if the line difference
between start and end point is > 0 (rather than > 1).
Fixes some odd cases introduced by CL 5706055;
pointed out by dsymonds.
Added corresponding test case. The other change
in the .golden file reverts to the status before
the CL mentioned above and is correct.
gofmt -w src misc changes godoc.go back to where
it was before the CL mentioned above.
Fixes#3304.
R=dsymonds, rsc
CC=golang-dev
https://golang.org/cl/5820044
Windows has paths like C:/Users/ADMIN~1. Also, it so happens
that go/parser allows ~ in import paths. So does the spec.
Fixes the build too.
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5777073
For URLs ending with /, the handler did not work, trying to append
".xml" to the path.
For instance, the "Share Memory by Communicating" returned the
following error:
open /Users/francisco.souza/lib/go/doc/codewalk/sharemem/.xml: no such file or directory
R=adg, minux.ma
CC=golang-dev
https://golang.org/cl/5797065
broke builders
««« original CL description
cmd/go: respect $GOBIN always
Before, we only consulted $GOBIN for source code
found in $GOROOT, but that's confusing to explain
and less useful. The new behavior lets users set
GOBIN=$HOME/bin and have all go-compiled binaries
installed there.
Fixes#3269.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5754088
»»»
TBR=bradfitz
CC=golang-dev
https://golang.org/cl/5794065
Before, we only consulted $GOBIN for source code
found in $GOROOT, but that's confusing to explain
and less useful. The new behavior lets users set
GOBIN=$HOME/bin and have all go-compiled binaries
installed there.
Fixes#3269.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5754088
Undo CL 5783076 and apply correct fix.
The /doc hack is wrong. The code to handle this case was
already there and just needs a simple fix:
// We didn't find any directories containing Go files.
// If some directory returned successfully, use that.
- if len(all) == 0 && first != nil {
+ if !haveGo {
for _, d := range first {
haveName[d.Name()] = true
all = append(all, d)
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5783079
They were necessary to produce a canonical script
when we checked in build scripts, but now they're just
getting in the way.
Fixes#3279.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5796068
The generated syscall files for Windows are still breaking "go tool api"
(unknown function []byte); I'll look at fixing that separately.
Fixes#3285.
R=bradfitz
CC=golang-dev
https://golang.org/cl/5777062
1) The -D argument should always be a pseudo-import path,
like _/Users/rsc/foo/bar, never a standard import path,
because we want local imports to always resolve to pseudo-paths.
2) Disallow local imports in non-local packages. Otherwise
everything works but you get two copies of a package
(the real one and the "local" one) in your binary.
R=golang-dev, bradfitz, yiyu.jgl
CC=golang-dev
https://golang.org/cl/5787055
So that we don't duplicate knowledge about which OS/ARCH combination
supports cgo.
Also updated src/run.bash and src/sudo.bash to use 'go env'.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5792055
1. consistent usage section (go tool xxx)
2. reformat cmd/ld document with minor correction
document which -H flags are valid on which ld
document -d flag can't be used on Windows.
document -Hwindowsgui
R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/5782043
Before:
$ go run x.go
signal 11 (core dumped)
$
After:
$ go run x.go
runtime: cgo callback on thread not created by Go.
signal 11 (core dumped)
$
For issue 3068.
Not a fix, but as much of a fix as we can do before Go 1.
R=golang-dev, rogpeppe, gri
CC=golang-dev
https://golang.org/cl/5781047
doc: convert to use godoc built-in templates
tmpltohtml is gone, to avoid having a second copy of the code.
Instead, godoc -url /doc/go1.html will print the actual HTML
served for that URL. "make" will generate files named go1.rawhtml
etc, which can be fed through tidy.
It can be hard to tell from the codereview diffs, but all the
tmpl files have been renamed to be html files and then
have "Template": true added.
R=golang-dev, adg, r, gri
CC=golang-dev
https://golang.org/cl/5782046
Was missing recompilation of packages imported only
by external test packages (package foo_test), primarily
because Root was not set, so those packages looked like
they were from a different Go tree, so they were not
recompiled if they already existed.
Also clean things up so that only one call to computeStale
is needed.
Fixes#3238.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5786048
The spec is looser than the current implementation.
The spec edit was made in CL 4444050 (May 2011)
but I never implemented it.
Fixes#3244.
R=ken2
CC=golang-dev
https://golang.org/cl/5785049
.syso files are system objects copied directly
into the package archive.
Fixes#1552.
R=alex.brainman, iant, r, minux.ma, remyoudompheng
CC=golang-dev
https://golang.org/cl/5778043
The compiler must be changed with the Set method
so that the buildToolchain gets updated too.
Fixes#3231.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5768044
$ go run
go run: no go files listed
$ go run ../../pkg/math/bits.go
go run: cannot run non-main package
$
Fixes#3168.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5755064
Either documentation or implementation
of go run's flags is wrong currently.
This change assumes the documentation
to be right.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5752054
This CL permits using arbitrary, non-VCS-qualified URLs as
aliases for fully VCS-qualified and/or well-known code hosting
sites.
Example 1) A VCS-qualified URL can now be shorter.
Before:
$ go get camlistore.org/r/p/camlistore.git/pkg/blobref
After:
$ go get camlistore.org/pkg/blobref
Example 2) A custom domain can be used as the import,
referencing a well-known code hosting site.
Before:
$ go get github.com/bradfitz/sonden
After:
$ go get bradfitz.com/pkg/sonden
The mechanism used is a <meta> tag in the HTML document
retrieved from fetching:
https://<import>?go-get=1 (preferred)
http://<import>?go-get=1 (fallback)
The meta tag should look like:
<meta name="go-import" content="import-alias-prefix vcs full-repo-root">
The full-repo-root must be a full URL root to a repository containing
a scheme and *not* containing a ".vcs" qualifier.
The vcs is one of "git", "hg", "svn", etc.
The import-alias-prefix must be a prefix or exact match of the
package being fetched with "go get".
If there are multiple meta tags, only the one with a prefix
matching the import path is used. It is an error if multiple
go-import values match the import prefix.
If the import-alias-prefix is not an exact match for the import,
another HTTP fetch is performed, at the declared root (which does
*not* need to be the domain's root).
For example, assuming that "camlistore.org/pkg/blobref" declares
in its HTML head:
<meta name="go-import" content="camlistore.org git https://camlistore.org/r/p/camlistore" />
... then:
$ go get camlistore.org/pkg/blobref
... looks at the following URLs:
https://camlistore.org/pkg/blobref?go-get=1http://camlistore.org/pkg/blobref?go-get=1https://camlistore.org/?go-get=1http://camlistore.org/?go-get=1
Ultimately it finds, at the root (camlistore.org/), the same go-import:
<meta name="go-import" content="camlistore.org git https://camlistore.org/r/p/camlistore" />
... and proceeds to trust it, checking out git //camlistore.org/r/p/camlistore at
the import path of "camlistore.org" on disk.
Fixes#3099
R=r, rsc, gary.burd, eikeon, untheoretic, n13m3y3r, rsc
CC=golang-dev
https://golang.org/cl/5660051
GOROOT_FINAL is a build parameter that means "eventually
the Go tree will be installed here". Make the file name information
match that eventual location.
Fixes#3180.
R=ken, ken
CC=golang-dev
https://golang.org/cl/5742043
The motivation for this CL is to support $GOPATH well.
Since we already have a FileSystem interface, implement a
Plan 9-style name space. Bind each of the $GOPATH src
directories onto the $GOROOT src/pkg directory: now
everything is laid out exactly like a normal $GOROOT and
needs very little special case code.
The filter files are no longer used (by us), so I think they
can just be deleted. Similarly, the Mapping code and the
FileSystem interface were two different ways to accomplish
the same end, so delete the Mapping code.
Within the implementation, since FileSystem is defined to be
slash-separated, use package path consistently, leaving
path/filepath only for manipulating operating system paths.
I kept the -path flag, but I think it can be deleted too.
Fixes#2234.
Fixes#3046.
R=gri, r, r, rsc
CC=golang-dev
https://golang.org/cl/5711058
I tried before to make relative imports work by simply
invoking the compiler in the right directory, so that
an import of ./foo could be resolved by ./foo.a.
This required creating a separate tree of package binaries
that included the full path to the source directory, so that
/home/gopher/bar.go would be compiled in
tmpdir/work/local/home/gopher and perhaps find
a ./foo.a in that directory.
This model breaks on Windows because : appears in path
names but cannot be used in subdirectory names, and I
missed one or two places where it needed to be removed.
The model breaks more fundamentally when compiling
a test of a package that lives outside the Go path, because
we effectively use a ./ import in the generated testmain,
but there we want to be able to resolve the ./ import
of the test package to one directory and all the other ./
imports to a different directory. Piggybacking on the compiler's
current working directory is then no longer possible.
Instead, introduce a new compiler option -D prefix that
makes the compiler turn a ./ import into prefix+that,
so that import "./foo" with -D a/b/c turns into import
"a/b/c/foo". Then we can invent a package hierarchy
"_/" with subdirectories named for file system paths:
import "./foo" in the directory /home/gopher becomes
import "_/home/gopher/foo", and since that final path
is just an ordinary import now, all the ordinary processing
works, without special cases.
We will have to change the name of the hierarchy if we
ever decide to introduce a standard package with import
path "_", but that seems unlikely, and the detail is known
only in temporary packages that get thrown away at the
end of a build.
Fixes#3169.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5732045
