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go/ssa/interp/external_unix.go
Alan Donovan cd908f1108 go.tools/ssa/interp: capture stdout/err of target programs and check for "BUG".
The $GOROOT/tests may print "BUG" on failure but do not
necessarily exit zero, so we must capture their output too.

Details:
- make plan9 use unix's valueToBytes function (now in externals.go)
- direct the target's syscall.Write and print/println built-ins to a new utility, write().  This may capture the output into a global variable.

R=gri, r
CC=golang-dev
https://golang.org/cl/14550044
2013-10-08 14:35:39 -04:00

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// Copyright 2013 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 !windows,!plan9
package interp
import (
"syscall"
"code.google.com/p/go.tools/ssa"
)
func fillStat(st *syscall.Stat_t, stat structure) {
stat[0] = st.Dev
stat[1] = st.Ino
stat[2] = st.Nlink
stat[3] = st.Mode
stat[4] = st.Uid
stat[5] = st.Gid
stat[7] = st.Rdev
stat[8] = st.Size
stat[9] = st.Blksize
stat[10] = st.Blocks
// TODO(adonovan): fix: copy Timespecs.
// stat[11] = st.Atim
// stat[12] = st.Mtim
// stat[13] = st.Ctim
}
func ext۰syscall۰Close(fn *ssa.Function, args []value) value {
// func Close(fd int) (err error)
return wrapError(syscall.Close(args[0].(int)))
}
func ext۰syscall۰Fstat(fn *ssa.Function, args []value) value {
// func Fstat(fd int, stat *Stat_t) (err error)
fd := args[0].(int)
stat := (*args[1].(*value)).(structure)
var st syscall.Stat_t
err := syscall.Fstat(fd, &st)
fillStat(&st, stat)
return wrapError(err)
}
func ext۰syscall۰ReadDirent(fn *ssa.Function, args []value) value {
// func ReadDirent(fd int, buf []byte) (n int, err error)
fd := args[0].(int)
p := args[1].([]value)
b := make([]byte, len(p))
n, err := syscall.ReadDirent(fd, b)
for i := 0; i < n; i++ {
p[i] = b[i]
}
return tuple{n, wrapError(err)}
}
func ext۰syscall۰Kill(fn *ssa.Function, args []value) value {
// func Kill(pid int, sig Signal) (err error)
return wrapError(syscall.Kill(args[0].(int), syscall.Signal(args[1].(int))))
}
func ext۰syscall۰Lstat(fn *ssa.Function, args []value) value {
// func Lstat(name string, stat *Stat_t) (err error)
name := args[0].(string)
stat := (*args[1].(*value)).(structure)
var st syscall.Stat_t
err := syscall.Lstat(name, &st)
fillStat(&st, stat)
return wrapError(err)
}
func ext۰syscall۰Open(fn *ssa.Function, args []value) value {
// func Open(path string, mode int, perm uint32) (fd int, err error) {
path := args[0].(string)
mode := args[1].(int)
perm := args[2].(uint32)
fd, err := syscall.Open(path, mode, perm)
return tuple{fd, wrapError(err)}
}
func ext۰syscall۰ParseDirent(fn *ssa.Function, args []value) value {
// func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string)
max := args[1].(int)
var names []string
for _, iname := range args[2].([]value) {
names = append(names, iname.(string))
}
consumed, count, newnames := syscall.ParseDirent(valueToBytes(args[0]), max, names)
var inewnames []value
for _, newname := range newnames {
inewnames = append(inewnames, newname)
}
return tuple{consumed, count, inewnames}
}
func ext۰syscall۰Read(fn *ssa.Function, args []value) value {
// func Read(fd int, p []byte) (n int, err error)
fd := args[0].(int)
p := args[1].([]value)
b := make([]byte, len(p))
n, err := syscall.Read(fd, b)
for i := 0; i < n; i++ {
p[i] = b[i]
}
return tuple{n, wrapError(err)}
}
func ext۰syscall۰Stat(fn *ssa.Function, args []value) value {
// func Stat(name string, stat *Stat_t) (err error)
name := args[0].(string)
stat := (*args[1].(*value)).(structure)
var st syscall.Stat_t
err := syscall.Stat(name, &st)
fillStat(&st, stat)
return wrapError(err)
}
func ext۰syscall۰Write(fn *ssa.Function, args []value) value {
// func Write(fd int, p []byte) (n int, err error)
n, err := write(args[0].(int), valueToBytes(args[1]))
return tuple{n, wrapError(err)}
}