qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-09-28 23:24:33 -06:00
Code Releases Activity

runtime: tricky replacements of _g_ in os3_solaris.go

Browse Source 
The argument to semacreate is always getg().m.

Change-Id: I4c4104cd6b57ab6b9ed0b7d11b8089bcc9fdd621
Reviewed-on: https://go-review.googlesource.com/c/go/+/418583
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Michael Pratt 2022-07-20 11:48:43 -04:00
parent 54a0ab3f7b
commit b486518964
1 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/runtime/os3_solaris.go
View File

@ -308,18 +308,17 @@ func semacreate(mp *m) {
} }
var sem *semt var sem *semt
_g_ := getg()
// Call libc's malloc rather than malloc. This will // Call libc's malloc rather than malloc. This will
// allocate space on the C heap. We can't call malloc // allocate space on the C heap. We can't call malloc
// here because it could cause a deadlock. // here because it could cause a deadlock.
_g_.m.libcall.fn = uintptr(unsafe.Pointer(&libc_malloc)) mp.libcall.fn = uintptr(unsafe.Pointer(&libc_malloc))
_g_.m.libcall.n = 1 mp.libcall.n = 1
_g_.m.scratch = mscratch{} mp.scratch = mscratch{}
_g_.m.scratch.v[0] = unsafe.Sizeof(*sem) mp.scratch.v[0] = unsafe.Sizeof(*sem)
_g_.m.libcall.args = uintptr(unsafe.Pointer(&_g_.m.scratch)) mp.libcall.args = uintptr(unsafe.Pointer(&mp.scratch))
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&_g_.m.libcall)) asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&mp.libcall))
sem = (*semt)(unsafe.Pointer(_g_.m.libcall.r1)) sem = (*semt)(unsafe.Pointer(mp.libcall.r1))
if sem_init(sem, 0, 0) != 0 { if sem_init(sem, 0, 0) != 0 {
throw("sem_init") throw("sem_init")
} }