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author | Hana (Hyang-Ah) Kim <hyangah@gmail.com> | 2018-05-10 00:01:15 +0800 |
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committer | Hyang-Ah Hana Kim <hyangah@gmail.com> | 2018-05-23 19:01:58 +0000 |
commit | 3f89214940d1f922bc4fde923de658a2ec1e4ac3 (patch) | |
tree | fb89ac6e1aeb8f479d60fa912a337f3456bab4f7 /src/cmd/vendor/golang.org/x/sys/unix/syscall_linux_arm.go | |
parent | 392ff18b8fdcb1f116f81887ddedfd43b19fdb9c (diff) | |
download | go-git-3f89214940d1f922bc4fde923de658a2ec1e4ac3.tar.gz |
cmd/pprof: add readline support similar to upstream
The upstream pprof implements the readline feature using
the github.com/chzyer/readline package in its pprof.go main.
It would be ideal to use the same readline support package as
the upstream for better user experience and code maintenance.
However, bringing in third-party packages requires more work
than I envisioned (e.g. clean up the vendored code to meet the
expected standard - iow don't break builders).
As a result, this change implements the similar feature
for the pprof command included in the go distribution
(cmd/pprof/pprof.go) using golang.org/x/crypto/ssh/terminal
for now.
Auto-completion is not yet supported (same in the upstream).
The feature is enabled only in linux, windows, darwin, and
only when terminal support is available.
This change brings in new vendored packages,
golang.org/x/crypto/ssh/terminal and
golang.org/x/sys/{unix,windows}.
For #14041
Change-Id: If4a790796acf2ab20f7e81268b9d9354c5a5cd2b
Reviewed-on: https://go-review.googlesource.com/112436
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Diffstat (limited to 'src/cmd/vendor/golang.org/x/sys/unix/syscall_linux_arm.go')
-rw-r--r-- | src/cmd/vendor/golang.org/x/sys/unix/syscall_linux_arm.go | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux_arm.go new file mode 100644 index 0000000000..c59f8588f1 --- /dev/null +++ b/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux_arm.go @@ -0,0 +1,255 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build arm,linux + +package unix + +import ( + "syscall" + "unsafe" +) + +func setTimespec(sec, nsec int64) Timespec { + return Timespec{Sec: int32(sec), Nsec: int32(nsec)} +} + +func setTimeval(sec, usec int64) Timeval { + return Timeval{Sec: int32(sec), Usec: int32(usec)} +} + +func Pipe(p []int) (err error) { + if len(p) != 2 { + return EINVAL + } + var pp [2]_C_int + err = pipe2(&pp, 0) + p[0] = int(pp[0]) + p[1] = int(pp[1]) + return +} + +//sysnb pipe2(p *[2]_C_int, flags int) (err error) + +func Pipe2(p []int, flags int) (err error) { + if len(p) != 2 { + return EINVAL + } + var pp [2]_C_int + err = pipe2(&pp, flags) + p[0] = int(pp[0]) + p[1] = int(pp[1]) + return +} + +// Underlying system call writes to newoffset via pointer. +// Implemented in assembly to avoid allocation. +func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno) + +func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { + newoffset, errno := seek(fd, offset, whence) + if errno != 0 { + return 0, errno + } + return newoffset, nil +} + +//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) +//sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) +//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) +//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) +//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 +//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32 +//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) +//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) +//sysnb socket(domain int, typ int, proto int) (fd int, err error) +//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) +//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) +//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) +//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) +//sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) +//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) +//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) + +// 64-bit file system and 32-bit uid calls +// (16-bit uid calls are not always supported in newer kernels) +//sys Dup2(oldfd int, newfd int) (err error) +//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 +//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 +//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64 +//sysnb Getegid() (egid int) = SYS_GETEGID32 +//sysnb Geteuid() (euid int) = SYS_GETEUID32 +//sysnb Getgid() (gid int) = SYS_GETGID32 +//sysnb Getuid() (uid int) = SYS_GETUID32 +//sysnb InotifyInit() (fd int, err error) +//sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32 +//sys Listen(s int, n int) (err error) +//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 +//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 +//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT +//sys Setfsgid(gid int) (err error) = SYS_SETFSGID32 +//sys Setfsuid(uid int) (err error) = SYS_SETFSUID32 +//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32 +//sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32 +//sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32 +//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32 +//sys Shutdown(fd int, how int) (err error) +//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) +//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 + +// Vsyscalls on amd64. +//sysnb Gettimeofday(tv *Timeval) (err error) +//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) +//sys Pause() (err error) + +func Time(t *Time_t) (Time_t, error) { + var tv Timeval + err := Gettimeofday(&tv) + if err != nil { + return 0, err + } + if t != nil { + *t = Time_t(tv.Sec) + } + return Time_t(tv.Sec), nil +} + +func Utime(path string, buf *Utimbuf) error { + tv := []Timeval{ + {Sec: buf.Actime}, + {Sec: buf.Modtime}, + } + return Utimes(path, tv) +} + +//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 +//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 +//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 +//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 + +func Fadvise(fd int, offset int64, length int64, advice int) (err error) { + _, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32)) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) + +func Fstatfs(fd int, buf *Statfs_t) (err error) { + _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) + if e != 0 { + err = e + } + return +} + +func Statfs(path string, buf *Statfs_t) (err error) { + pathp, err := BytePtrFromString(path) + if err != nil { + return err + } + _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) + if e != 0 { + err = e + } + return +} + +func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { + page := uintptr(offset / 4096) + if offset != int64(page)*4096 { + return 0, EINVAL + } + return mmap2(addr, length, prot, flags, fd, page) +} + +type rlimit32 struct { + Cur uint32 + Max uint32 +} + +//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT + +const rlimInf32 = ^uint32(0) +const rlimInf64 = ^uint64(0) + +func Getrlimit(resource int, rlim *Rlimit) (err error) { + err = prlimit(0, resource, nil, rlim) + if err != ENOSYS { + return err + } + + rl := rlimit32{} + err = getrlimit(resource, &rl) + if err != nil { + return + } + + if rl.Cur == rlimInf32 { + rlim.Cur = rlimInf64 + } else { + rlim.Cur = uint64(rl.Cur) + } + + if rl.Max == rlimInf32 { + rlim.Max = rlimInf64 + } else { + rlim.Max = uint64(rl.Max) + } + return +} + +//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT + +func Setrlimit(resource int, rlim *Rlimit) (err error) { + err = prlimit(0, resource, rlim, nil) + if err != ENOSYS { + return err + } + + rl := rlimit32{} + if rlim.Cur == rlimInf64 { + rl.Cur = rlimInf32 + } else if rlim.Cur < uint64(rlimInf32) { + rl.Cur = uint32(rlim.Cur) + } else { + return EINVAL + } + if rlim.Max == rlimInf64 { + rl.Max = rlimInf32 + } else if rlim.Max < uint64(rlimInf32) { + rl.Max = uint32(rlim.Max) + } else { + return EINVAL + } + + return setrlimit(resource, &rl) +} + +func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } + +func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } + +func (iov *Iovec) SetLen(length int) { + iov.Len = uint32(length) +} + +func (msghdr *Msghdr) SetControllen(length int) { + msghdr.Controllen = uint32(length) +} + +func (cmsg *Cmsghdr) SetLen(length int) { + cmsg.Len = uint32(length) +} + +//sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) + +func Poll(fds []PollFd, timeout int) (n int, err error) { + if len(fds) == 0 { + return poll(nil, 0, timeout) + } + return poll(&fds[0], len(fds), timeout) +} |