3ef91fec25
From r16, the legacy headers no longer ship with the NDK. Update the gomobile build system to use the unified headers instead. They're available from r14. Based on a patch by Steeve Morin. Fixes golang/go#21802 Change-Id: I098330962c737edb833e968fe82558e15837f23f Reviewed-on: https://go-review.googlesource.com/69950 Reviewed-by: David Crawshaw <crawshaw@golang.org>
94 lines
1.9 KiB
Go
94 lines
1.9 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package mobileinit
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/*
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To view the log output run:
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adb logcat GoLog:I *:S
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*/
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// Android redirects stdout and stderr to /dev/null.
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// As these are common debugging utilities in Go,
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// we redirect them to logcat.
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//
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// Unfortunately, logcat is line oriented, so we must buffer.
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/*
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#cgo LDFLAGS: -landroid -llog
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#include <android/log.h>
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#include <stdlib.h>
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#include <string.h>
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*/
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import "C"
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import (
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"bufio"
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"log"
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"os"
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"syscall"
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"unsafe"
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)
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var (
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ctag = C.CString("GoLog")
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// Store the writer end of the redirected stderr and stdout
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// so that they are not garbage collected and closed.
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stderr, stdout *os.File
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)
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type infoWriter struct{}
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func (infoWriter) Write(p []byte) (n int, err error) {
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cstr := C.CString(string(p))
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C.__android_log_write(C.ANDROID_LOG_INFO, ctag, cstr)
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C.free(unsafe.Pointer(cstr))
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return len(p), nil
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}
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func lineLog(f *os.File, priority C.int) {
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const logSize = 1024 // matches android/log.h.
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r := bufio.NewReaderSize(f, logSize)
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for {
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line, _, err := r.ReadLine()
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str := string(line)
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if err != nil {
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str += " " + err.Error()
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}
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cstr := C.CString(str)
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C.__android_log_write(priority, ctag, cstr)
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C.free(unsafe.Pointer(cstr))
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if err != nil {
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break
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}
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}
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}
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func init() {
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log.SetOutput(infoWriter{})
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// android logcat includes all of log.LstdFlags
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log.SetFlags(log.Flags() &^ log.LstdFlags)
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r, w, err := os.Pipe()
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if err != nil {
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panic(err)
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}
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stderr = w
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if err := syscall.Dup3(int(w.Fd()), int(os.Stderr.Fd()), 0); err != nil {
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panic(err)
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}
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go lineLog(r, C.ANDROID_LOG_ERROR)
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r, w, err = os.Pipe()
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if err != nil {
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panic(err)
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}
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stdout = w
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if err := syscall.Dup3(int(w.Fd()), int(os.Stdout.Fd()), 0); err != nil {
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panic(err)
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}
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go lineLog(r, C.ANDROID_LOG_INFO)
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}
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