The cmd/cc bundled with 9c has additional code compared to our cmd/cc, and
without those code, 9c couldn't handle switch statement where the expression
is not just a simple int32 or int64 variable (e.g. g->status or int8 variable).
All credit goes to rsc.
LGTM=rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/125840043
To reduce delta for the upcoming liblink CL.
Just code movement, no semantic changes.
LGTM=rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/124830043
After CL 117670045, cmd/dist will expect to have a cmd/9g directory.
LGTM=rsc, dave
R=rsc, iant, dave
CC=golang-codereviews
https://golang.org/cl/126780043
No modifications other than adding copyright header to each file, and
concatenating several cmd/9l files together to form the liblink files.
LGTM=rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/123840043
hg insists that we not list explicit files for a merge.
for benefit of other tools reading logs, include branch prefix
at start of every commit message.
LGTM=minux
R=minux
CC=golang-codereviews
https://golang.org/cl/124780044
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
The linker currently produces the DWARF 3 DW_TAG_unspecified_type tag, however the Reader in debug/dwarf will panic whenever that tag is encountered.
Fixes#8437.
LGTM=rsc
R=golang-codereviews, bradfitz, iant, rsc
CC=golang-codereviews
https://golang.org/cl/117280043
This is an experiment. See mail on golang-dev
(subject: "an experiment: development branches").
LGTM=minux
R=minux
CC=golang-codereviews
https://golang.org/cl/117660043
It can happen legitimately if a profiling signal arrives at just the wrong moment.
It's harmless.
Fixes#8153.
LGTM=minux
R=golang-codereviews, minux
CC=golang-codereviews, iant, r
https://golang.org/cl/118670043
Full spans can't be passed to UncacheSpan since we get rid of free.
LGTM=rsc
R=golang-codereviews
CC=golang-codereviews, khr, rsc
https://golang.org/cl/119490044
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
Encode MOV $0, %ax as XOR %eax, %eax instead of
XOR %rax, %rax. If an operand register does not
need REX.w bit (i.e. not one of R8-R15), it is
encoded in 2 bytes instead of 3 bytes.
LGTM=rsc
R=golang-codereviews, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/115580044
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
Before fixing issue 6579 this CL separates DNS transport from
DNS message interaction to make it easier to add builtin DNS
resolver control logic.
Update #6579
LGTM=alex, kevlar
R=golang-codereviews, alex, gobot, iant, minux, kevlar
CC=golang-codereviews
https://golang.org/cl/101220044
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 call scanblock for lots of small root pieces
e.g. for every stack frame args and locals area.
Every scanblock invocation calls getempty/putempty,
which accesses lock-free stack shared among all worker threads.
One-element local cache allows most scanblock calls
to proceed without accessing the shared stack.
LGTM=rsc
R=golang-codereviews, rlh
CC=golang-codereviews, khr, rsc
https://golang.org/cl/121250043
