When building golang, the environment variable GOROOT_FINAL can be set
to indicate a different installation location from the build
location. This works fine, except that the goc2c build step embeds
line numbers in the resulting c source files that refer to the build
location, no the install location.
This would not be a big deal, except that in turn the linker uses the
location of runtime/string.goc to embed the gdb script in the
resulting binary and as a net result, the debugger now complains that
the script is outside its load path (it has the install location
configured).
See https://code.google.com/p/go/issues/detail?id=8524 for the full
description.
Fixes#8524.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/128230046
E.g., here's the new "go build" output:
$ go build misc/cgo/errors/issue8442.go
# command-line-arguments
could not determine kind of name for C.issue8442foo
gcc errors for preamble:
misc/cgo/errors/issue8442.go:11:19: error: unknown type name 'UNDEF'
Fixes#8442.
LGTM=iant
R=iant, alex.brainman
CC=golang-codereviews
https://golang.org/cl/129160043
In cgo, now that recursive calls to typeConv.Type() always work,
we can more robustly calculate the array sizes based on the size
of our element type.
Also, in debug/dwarf, the decision to call zeroType is made
based on a type's usage within a particular struct, but dwarf.Type
values are cached in typeCache, so the modification might affect
uses of the type in other structs. Current compilers don't appear
to share DWARF type entries for "[]foo" and "[0]foo", but they also
don't consistently share type entries in other cases. Arguably
modifying the types is an improvement in some cases, but varying
translated types according to compiler whims seems like a bad idea.
Lastly, also in debug/dwarf, zeroType only needs to rewrite the
top-level dimension, and only if the rest of the array size is
non-zero.
Fixes#8428.
LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/127980043
Basically this cleanup replaces all the usage usages of strcmp() == 0,
found by the following command line:
$ grep -R strcmp cmd/dist | grep "0"
LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/123330043
The file is used by assembly code to define symbols like NOSPLIT.
Having it hidden inside the cmd directory makes it hard to access
outside the standard repository.
Solution: As with a couple of other files used by cgo, copy the
file into the pkg directory and add a -I argument to the assembler
to access it. Thus one can write just
#include "textflag.h"
in .s files.
The names in runtime are not updated because in the boot sequence the
file has not been copied yet when runtime is built. All other .s files
in the repository are updated.
Changes to doc/asm.html, src/cmd/dist/build.c, and src/cmd/go/build.go
are hand-made. The rest are just the renaming done by a global
substitution. (Yay sam).
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/128050043
This allows implementing address-of-global
as a pc-relative address instead of as a
32-bit integer constant.
LGTM=rminnich, iant
R=golang-codereviews, rminnich, iant
CC=golang-codereviews
https://golang.org/cl/128070045
codeblk and datblk were truncating their
arguments to int32. Don't do that.
LGTM=dvyukov, rminnich
R=iant, dvyukov, rminnich
CC=golang-codereviews
https://golang.org/cl/126050043
See golang.org/s/go14customimport for design.
Added case to deps_test to allow go/build to import regexp.
Not a new dependency, because go/build already imports go/doc
which imports regexp.
Fixes#7453.
LGTM=r
R=r, josharian
CC=golang-codereviews
https://golang.org/cl/124940043
This function does not have a declaration/prototype in a.h, and it is used only
in buf.c, so it is local to it and thus can be marked as private by adding
'static' to it.
LGTM=iant
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/122300043
This makes GCC behavior (and cgo build failures) deterministic.
Fixes#8487.
Ran this shell command on linux/amd64 (Ubuntu 12.04) before and
after this change:
for x in `seq 100`; do
go tool cgo -debug-gcc=true issue8441.go 2>&1 | md5sum
done | sort | uniq -c
Before:
67 2cdcb8c7c4e290f7d9009abc581b83dd -
10 9a55390df94f7cec6d810f3e20590789 -
10 acfad22140d43d9b9517bbc5dfc3c0df -
13 c337f8fee2304b3a8e3158a4362d8698 -
After:
100 785c316cbcbcd50896695050e2fa23c1 -
LGTM=minux, iant
R=golang-codereviews, bradfitz, minux, iant
CC=golang-codereviews
https://golang.org/cl/126990043
Credit to Rémy for finding and writing test case.
Fixes#8325.
LGTM=r
R=golang-codereviews, r
CC=dave, golang-codereviews, iant, remyoudompheng
https://golang.org/cl/124950043
The >>1 shift needs to happen before converting to int32, otherwise
large values will decode with an incorrect sign bit.
The <<31 shift can happen before or after, but before is consistent
with liblink and the go12symtab doc.
Bug demo at http://play.golang.org/p/jLrhPUakIu
LGTM=rsc
R=golang-codereviews, minux, rsc
CC=golang-codereviews
https://golang.org/cl/119630043
Some systems, like Ubuntu, pass --build-id when linking. The
effect is to put a note in the output file. This is not
useful when generating an object file with the -r option, as
it eventually causes multiple build ID notes in the final
executable, all but one of which are for tiny portions of the
file and are therefore useless.
Disable that by passing an explicit --build-id=none when
linking with -r on systems that might do this.
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/119460043
To do in another CL: make cmd/objdump use cmd/internal/objfile too.
There is a package placement decision in this CL:
cmd/internal/objfile instead of internal/objfile.
I chose to put internal under cmd to make clear (and enforce)
that no standard library packages should use this
(it's a bit dependency-heavy).
LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/123910043
Eliminating use of this extension makes it easier to port the Go runtime
to other compilers. This CL also disables the extension in cc to prevent
accidental use.
LGTM=rsc, khr
R=rsc, aram, khr, dvyukov
CC=axwalk, golang-codereviews
https://golang.org/cl/106790044
This fixes two problems: x/internal/y/z was using parent = x/internal/y instead of x,
and hasPathPrefix only looks at /, not \ for Windows.
LGTM=bradfitz
R=bradfitz
CC=golang-codereviews
https://golang.org/cl/121280045
1) The arrayindexof lookup function is O(n). Replace with O(1) lookups.
2) The checkptxt function is O(n²) and is purely for debugging.
Only run when the debugging flags are turned on.
3) Iterating over sparse bitmaps can be done faster word by word.
Introduce and use bvnext for that.
Run times before and after, on my 2.5 GHz Core i5 MacBook Pro.
x.go 9.48 0.84 issue 8259
x100.go 0.01 0.01 issue 8354
x1000.go 0.10 0.10
x2000.go 0.62 0.19
x3000.go 1.33 0.34
x4000.go 2.29 0.49
x5000.go 3.89 0.67
x6000.go 5.00 0.90
x7000.go 6.70 1.13
x8000.go 9.44 1.38
x9000.go 11.23 1.87
x10000.go 13.78 2.09
Fixes#8259.
Fixes#8354.
LGTM=iant, r
R=golang-codereviews, iant, r
CC=golang-codereviews
https://golang.org/cl/125720043
Since CL 115060044, mkanames declares an empty
array in anames8.c and anames6.c, which is not
valid for the Plan 9 compiler.
char* cnames8[] = {
};
This change makes mkanames not declaring the
cnames array when no C_ constants are found.
LGTM=iant
R=minux, iant
CC=golang-codereviews
https://golang.org/cl/117680043
The helps certain diagnostics and also removed duplicated enums as a side effect.
LGTM=dave, rsc
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/115060044
Instead of immediately completing pointer type mappings, add them to
a queue to allow them to be completed later. This fixes issues caused
by Type() returning arbitrary in-progress type mappings.
Fixes#8368.
Fixes#8441.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/122850043
Instead of including <sys/types.h> to get size_t, instead include
the ISO C standard <stddef.h> header, which defines fewer additional
types at risk of colliding with the user code. In particular, this
prevents collisions between <sys/types.h>'s userspace definitions with
the kernel definitions needed by defs_linux.go.
Also, -cdefs mode uses #pragma pack, so we can keep misaligned fields.
Fixes#8477.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/120610043
Update #6677
When a struct contains an anonymous union, use the type and
name of the first field in the union.
This should make the glibc <sys/resource.h> file work; in that
file struct rusage has fields like
__extension__ union
{
long int ru_maxrss;
__syscall_slong_t __ru_maxrss_word;
};
in which the field that matters is ru_maxrss and
__ru_maxrss_word just exists to advance to the next field on
systems where the kernel uses long long fields but userspace
expects long fields.
LGTM=mikioh.mikioh
R=golang-codereviews, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/106260044
We have an autogenerated version in zruntime_defs.
I am not sure what are the consequences as gdb never printed any values for me.
But it looks unnecessary to manually duplicate it.
LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews, iant, khr
https://golang.org/cl/115660043
A good cleanup anyway, and it makes some room for an additional
field needed for issue 8412.
Update #8412
LGTM=iant
R=iant, khr
CC=golang-codereviews
https://golang.org/cl/112700043
Create proper closures so hash functions can be called
directly from Go. Rearrange calling convention so return
value is directly accessible.
LGTM=dvyukov
R=golang-codereviews, dvyukov, dave, khr
CC=golang-codereviews
https://golang.org/cl/119360043
