+// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Licensed under the Apache Public Source License 2.0 ("the License").
+// You may not use this file except in compliance with the License.
+
package org.ibex.nestedvm;
import org.ibex.nestedvm.util.*;
import java.io.*;
import java.util.*;
import java.net.*;
+import java.lang.reflect.*; // For lazily linked RuntimeCompiler
// FEATURE: vfork
private GlobalState gs;
public void setGlobalState(GlobalState gs) {
if(state != STOPPED) throw new IllegalStateException("can't change GlobalState when running");
+ if(gs == null) throw new NullPointerException("gs is null");
this.gs = gs;
}
if(!exec) {
gs = defaultGS;
String userdir = Platform.getProperty("user.dir");
- String nvroot = Platform.getProperty("nestedvm.root");
- cwd = "";
- if(userdir != null && nvroot == null) {
- if(userdir.startsWith("/") && File.separatorChar == '/') {
- cwd = userdir.substring(1);
- } else {
- Vector vec = new Vector();
- File root = HostFS.hostRootDir();
- String s = new File(userdir).getAbsolutePath();
- File d = new File(s);
- System.err.println(s);
- System.err.println(d);
- while(!d.equals(root)) {
- System.err.println("Got " + d.getName());
- vec.addElement(d.getName());
- if((s = d.getParent()) == null) break;
- d = new File(s);
- }
- if(s != null)
- for(int i=vec.size()-1;i>=0;i--) cwd += (String) vec.elementAt(i) + (i==0?"":"/");
- }
- }
+ cwd = (userdir == null || Platform.getProperty("nestedvm.root") != null) ? null : HostFS.reverseMap(userdir);
+ if(cwd == null) cwd = "/";
+ cwd = cwd.substring(1);
}
}
}
String[] createEnv(String[] extra) {
- String[] defaults = new String[6];
+ String[] defaults = new String[7];
int n=0;
if(extra == null) extra = new String[0];
+ String tmp;
if(!envHas("USER",extra) && Platform.getProperty("user.name") != null)
defaults[n++] = "USER=" + Platform.getProperty("user.name");
- if(!envHas("HOME",extra) && Platform.getProperty("user.home") != null)
- defaults[n++] = "HOME=" + Platform.getProperty("user.home");
+ if(!envHas("HOME",extra) && (tmp=Platform.getProperty("user.home")) != null && (tmp=HostFS.reverseMap(tmp)) != null)
+ defaults[n++] = "HOME=" + tmp;
+ if(!envHas("TMPDIR",extra) && (tmp=Platform.getProperty("java.io.tmpdir")) != null && (tmp=HostFS.reverseMap(tmp)) != null)
+ defaults[n++] = "TMPDIR=" + tmp;
if(!envHas("SHELL",extra)) defaults[n++] = "SHELL=/bin/sh";
if(!envHas("TERM",extra) && !win32Hacks) defaults[n++] = "TERM=vt100";
if(!envHas("TZ",extra)) defaults[n++] = "TZ=" + posixTZ();
case SYS_sendto: return sys_sendto(a,b,c,d,e,f);
case SYS_recvfrom: return sys_recvfrom(a,b,c,d,e,f);
case SYS_select: return sys_select(a,b,c,d,e);
-
+ case SYS_access: return sys_access(a,b);
+ case SYS_realpath: return sys_realpath(a,b);
+ case SYS_chown: return sys_chown(a,b,c);
+ case SYS_lchown: return sys_chown(a,b,c);
+ case SYS_fchown: return sys_fchown(a,b,c);
+ case SYS_chmod: return sys_chmod(a,b,c);
+ case SYS_fchmod: return sys_fchmod(a,b,c);
+ case SYS_umask: return sys_umask(a);
+
default: return super._syscall(syscall,a,b,c,d,e,f);
}
}
private int sys_getppid() {
return parent == null ? 1 : parent.pid;
}
+
+ private int sys_chown(int fileAddr, int uid, int gid) {
+ return 0;
+ }
+ private int sys_lchown(int fileAddr, int uid, int gid) {
+ return 0;
+ }
+ private int sys_fchown(int fd, int uid, int gid) {
+ return 0;
+ }
+ private int sys_chmod(int fileAddr, int uid, int gid) {
+ return 0;
+ }
+ private int sys_fchmod(int fd, int uid, int gid) {
+ return 0;
+ }
+ private int sys_umask(int mask) {
+ return 0;
+ }
+
+ private int sys_access(int cstring, int mode) throws ErrnoException, ReadFaultException {
+ // FEATURE: sys_access
+ return gs.stat(this,cstring(cstring)) == null ? -ENOENT : 0;
+ }
+
+ private int sys_realpath(int inAddr, int outAddr) throws FaultException {
+ String s = normalizePath(cstring(inAddr));
+ byte[] b = getNullTerminatedBytes(s);
+ if(b.length > PATH_MAX) return -ERANGE;
+ copyout(b,outAddr,b.length);
+ return 0;
+ }
// FEATURE: Signal handling
// check flag only on backwards jumps to basic blocks without compulsatory checks
private int sys_exec(int cpath, int cargv, int cenvp) throws ErrnoException, FaultException {
return exec(normalizePath(cstring(cpath)),readStringArray(cargv),readStringArray(cenvp));
}
+
+ private final static Method runtimeCompilerCompile;
+ static {
+ Method m;
+ try {
+ m = Class.forName("org.ibex.nestedvm.RuntimeCompiler").getMethod("compile",new Class[]{Seekable.class,String.class,String.class});
+ } catch(NoSuchMethodException e) {
+ m = null;
+ } catch(ClassNotFoundException e) {
+ m = null;
+ }
+ runtimeCompilerCompile = m;
+ }
+
+ public Class runtimeCompile(Seekable s, String sourceName) throws IOException {
+ if(runtimeCompilerCompile == null) {
+ if(STDERR_DIAG) System.err.println("WARNING: Exec attempted but RuntimeCompiler not found!");
+ return null;
+ }
- private int exec(String normalizedPath, String[] argv, String[] envp) throws ErrnoException {
+ try {
+ return (Class) runtimeCompilerCompile.invoke(null,new Object[]{s,"unixruntime,maxinsnpermethod=256,lessconstants",sourceName});
+ } catch(IllegalAccessException e) {
+ e.printStackTrace();
+ return null;
+ } catch(InvocationTargetException e) {
+ Throwable t = e.getTargetException();
+ if(t instanceof IOException) throw (IOException) t;
+ if(t instanceof RuntimeException) throw (RuntimeException) t;
+ if(t instanceof Error) throw (Error) t;
+ if(STDERR_DIAG) t.printStackTrace();
+ return null;
+ }
+ }
+
+ private int exec(String path, String[] argv, String[] envp) throws ErrnoException {
if(argv.length == 0) argv = new String[]{""};
-
+ // HACK: Hideous hack to make a standalone busybox possible
+ if(path.equals("bin/busybox") && getClass().getName().endsWith("BusyBox"))
+ return execClass(getClass(),argv,envp);
+
// NOTE: For this little hack to work nestedvm.root MUST be "."
/*try {
System.err.println("Execing normalized path: " + normalizedPath);
if(true) return exec(new Interpreter(normalizedPath),argv,envp);
} catch(IOException e) { throw new Error(e); }*/
- Object o = gs.exec(this,normalizedPath);
- if(o == null) return -ENOENT;
-
- if(o instanceof Class) {
- Class c = (Class) o;
- try {
- UnixRuntime r = (UnixRuntime) c.getDeclaredConstructor(new Class[]{Boolean.TYPE}).newInstance(new Object[]{Boolean.TRUE});
- return exec(r,argv,envp);
- } catch(Exception e) {
- e.printStackTrace();
- return -ENOEXEC;
+ FStat fstat = gs.stat(this,path);
+ if(fstat == null) return -ENOENT;
+ GlobalState.CacheEnt ent = (GlobalState.CacheEnt) gs.execCache.get(path);
+ long mtime = fstat.mtime();
+ long size = fstat.size();
+ if(ent != null) {
+ //System.err.println("Found cached entry for " + path);
+ if(ent.time ==mtime && ent.size == size) {
+ if(ent.o instanceof Class)
+ return execClass((Class) ent.o,argv,envp);
+ if(ent.o instanceof String[])
+ return execScript(path,(String[]) ent.o,argv,envp);
+ throw new Error("should never happen");
}
- } else {
- String[] command = (String[]) o;
- String[] newArgv = new String[argv.length + command[1] != null ? 2 : 1];
- int p = command[0].lastIndexOf('/');
- newArgv[0] = p == -1 ? command[0] : command[0].substring(p+1);
- p = 1;
- if(command[1] != null) newArgv[p++] = command[1];
- newArgv[p++] = "/" + normalizedPath;
- for(int i=1;i<argv.length;i++) newArgv[p++] = argv[i];
- return exec(command[0],newArgv,envp);
+ //System.err.println("Cache was out of date");
+ gs.execCache.remove(path);
+ }
+
+ FD fd = gs.open(this,path,RD_ONLY,0);
+ if(fd == null) throw new ErrnoException(ENOENT);
+ Seekable s = fd.seekable();
+ if(s == null) throw new ErrnoException(EACCES);
+
+ byte[] buf = new byte[4096];
+
+ try {
+ int n = s.read(buf,0,buf.length);
+ if(n == -1) throw new ErrnoException(ENOEXEC);
+
+ switch(buf[0]) {
+ case '\177': // possible ELF
+ if(n < 4) s.tryReadFully(buf,n,4-n);
+ if(buf[1] != 'E' || buf[2] != 'L' || buf[3] != 'F') return -ENOEXEC;
+ s.seek(0);
+ if(STDERR_DIAG) System.err.println("Running RuntimeCompiler for " + path);
+ Class c = runtimeCompile(s,path);
+ if(STDERR_DIAG) System.err.println("RuntimeCompiler finished for " + path);
+ if(c == null) throw new ErrnoException(ENOEXEC);
+ gs.execCache.put(path,new GlobalState.CacheEnt(mtime,size,c));
+ return execClass(c,argv,envp);
+ case '#':
+ if(n == 1) {
+ int n2 = s.read(buf,1,buf.length-1);
+ if(n2 == -1) return -ENOEXEC;
+ n += n2;
+ }
+ if(buf[1] != '!') return -ENOEXEC;
+ int p = 2;
+ n -= 2;
+ OUTER: for(;;) {
+ for(int i=p;i<p+n;i++) if(buf[i] == '\n') { p = i; break OUTER; }
+ p += n;
+ if(p == buf.length) break OUTER;
+ n = s.read(buf,p,buf.length-p);
+ }
+ int cmdStart = 2;
+ for(;cmdStart<p;cmdStart++) if(buf[cmdStart]!=' ') break;
+ if(cmdStart == p) throw new ErrnoException(ENOEXEC);
+ int argStart = cmdStart;
+ for(;argStart<p;argStart++) if(buf[argStart] == ' ') break;
+ int cmdEnd = argStart;
+ while(argStart < p && buf[argStart] == ' ') argStart++;
+ String[] command = new String[] {
+ new String(buf,cmdStart,cmdEnd-cmdStart),
+ argStart < p ? new String(buf,argStart,p-argStart) : null
+ };
+ gs.execCache.put(path,new GlobalState.CacheEnt(mtime,size,command));
+ return execScript(path,command,argv,envp);
+ default:
+ return -ENOEXEC;
+ }
+ } catch(IOException e) {
+ return -EIO;
+ } finally {
+ fd.close();
+ }
+ }
+
+ public int execScript(String path, String[] command, String[] argv, String[] envp) throws ErrnoException {
+ String[] newArgv = new String[argv.length-1 + (command[1] != null ? 3 : 2)];
+ int p = command[0].lastIndexOf('/');
+ newArgv[0] = p == -1 ? command[0] : command[0].substring(p+1);
+ newArgv[1] = "/" + path;
+ p = 2;
+ if(command[1] != null) newArgv[p++] = command[1];
+ for(int i=1;i<argv.length;i++) newArgv[p++] = argv[i];
+ if(p != newArgv.length) throw new Error("p != newArgv.length");
+ System.err.println("Execing: " + command[0]);
+ for(int i=0;i<newArgv.length;i++) System.err.println("execing [" + i + "] " + newArgv[i]);
+ return exec(command[0],newArgv,envp);
+ }
+
+ public int execClass(Class c,String[] argv, String[] envp) {
+ try {
+ UnixRuntime r = (UnixRuntime) c.getDeclaredConstructor(new Class[]{Boolean.TYPE}).newInstance(new Object[]{Boolean.TRUE});
+ return exec(r,argv,envp);
+ } catch(Exception e) {
+ e.printStackTrace();
+ return -ENOEXEC;
}
}
private int exec(UnixRuntime r, String[] argv, String[] envp) {
-
//System.err.println("Execing " + r);
for(int i=0;i<OPEN_MAX;i++) if(closeOnExec[i]) closeFD(i);
r.fds = fds;
return 0;
}
- public static class GlobalState {
+ public static final class GlobalState {
+ Hashtable execCache = new Hashtable();
+
final UnixRuntime[] tasks;
int nextPID = 1;
if(defaultMounts) {
addMount("/",new HostFS());
addMount("/dev",new DevFS());
+ addMount("/resource",new ResourceFS());
}
}
- private static class MP implements Sort.Comparable {
+ static class MP implements Sort.Comparable {
public MP(String path, FS fs) { this.path = path; this.fs = fs; }
public String path;
public FS fs;
public final void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { fsop(FS.MKDIR,r,path,mode,0); }
public final void unlink(UnixRuntime r, String path) throws ErrnoException { fsop(FS.UNLINK,r,path,0,0); }
- private Hashtable execCache = new Hashtable();
private static class CacheEnt {
public final long time;
public final long size;
public final Object o;
public CacheEnt(long time, long size, Object o) { this.time = time; this.size = size; this.o = o; }
}
-
- public synchronized Object exec(UnixRuntime r, String path) throws ErrnoException {
- // HACK: Hideous hack to make a standalone busybox possible
- if(path.equals("bin/busybox") && r.getClass().getName().endsWith("BusyBox")) return r.getClass();
-
- FStat fstat = stat(r,path);
- if(fstat == null) return null;
- long mtime = fstat.mtime();
- long size = fstat.size();
- CacheEnt ent = (CacheEnt) execCache.get(path);
- if(ent != null) {
- //System.err.println("Found cached entry for " + path);
- if(ent.time == mtime && ent.size == size) return ent.o;
- //System.err.println("Cache was out of date");
- execCache.remove(path);
- }
- FD fd = open(r,path,RD_ONLY,0);
- if(fd == null) return null;
- Seekable s = fd.seekable();
-
- String[] command = null;
-
- if(s == null) throw new ErrnoException(EACCES);
- byte[] buf = new byte[4096];
-
- try {
- int n = s.read(buf,0,buf.length);
- if(n == -1) throw new ErrnoException(ENOEXEC);
-
- switch(buf[0]) {
- case '\177': // possible ELF
- if(n < 4 && s.tryReadFully(buf,n,4-n) != 4-n) throw new ErrnoException(ENOEXEC);
- if(buf[1] != 'E' || buf[2] != 'L' || buf[3] != 'F') throw new ErrnoException(ENOEXEC);
- break;
- case '#':
- if(n == 1) {
- int n2 = s.read(buf,1,buf.length-1);
- if(n2 == -1) throw new ErrnoException(ENOEXEC);
- n += n2;
- }
- if(buf[1] != '!') throw new ErrnoException(ENOEXEC);
- int p = 2;
- n -= 2;
- OUTER: for(;;) {
- for(int i=p;i<p+n;i++) if(buf[i] == '\n') { p = i; break OUTER; }
- p += n;
- if(p == buf.length) break OUTER;
- n = s.read(buf,p,buf.length-p);
- }
- command = new String[2];
- int arg;
- for(arg=2;arg<p;arg++) if(buf[arg] == ' ') break;
- if(arg < p) {
- int cmdEnd = arg;
- while(arg < p && buf[arg] == ' ') arg++;
- command[0] = new String(buf,2,cmdEnd);
- command[1] = arg < p ? new String(buf,arg,p-arg) : null;
- } else {
- command[0] = new String(buf,2,p-2);
- }
- //System.err.println("command[0]: " + command[0] + " command[1]: " + command[1]);
- break;
- default:
- throw new ErrnoException(ENOEXEC);
- }
- } catch(IOException e) {
- fd.close();
- throw new ErrnoException(EIO);
- }
-
- if(command == null) {
- // its an elf binary
- try {
- s.seek(0);
- Class c = RuntimeCompiler.compile(s,"unixruntime");
- //System.err.println("Compile succeeded: " + c);
- ent = new CacheEnt(mtime,size,c);
- } catch(Compiler.Exn e) {
- if(STDERR_DIAG) e.printStackTrace();
- throw new ErrnoException(ENOEXEC);
- } catch(IOException e) {
- if(STDERR_DIAG) e.printStackTrace();
- throw new ErrnoException(EIO);
- }
- } else {
- ent = new CacheEnt(mtime,size,command);
- }
-
- fd.close();
-
- execCache.put(path,ent);
- return ent.o;
- }
}
public abstract static class FS {
char[] in = new char[path.length()+1];
char[] out = new char[in.length + (absolute ? -1 : cwd.length())];
+ path.getChars(0,path.length(),in,0);
int inp=0, outp=0;
if(absolute) {
outp = cwdl;
}
- path.getChars(0,path.length(),in,0);
while(in[inp] != 0) {
if(inp != 0) {
while(in[inp] != 0 && in[inp] != '/') { out[outp++] = in[inp++]; }
}
if(outp > 0 && out[outp-1] == '/') outp--;
//System.err.println("normalize: " + path + " -> " + new String(out,0,outp) + " (cwd: " + cwd + ")");
- return new String(out,0,outp);
+ int outStart = out[0] == '/' ? 1 : 0;
+ return new String(out,outStart,outp - outStart);
}
FStat hostFStat(final File f, Object data) {
return f;
}
+ static String reverseMap(String f) {
+ if(f.startsWith("/") && File.separatorChar == '/') return f;
+
+ Vector vec = new Vector();
+ File root = HostFS.hostRootDir();
+ String s = new File(f).getAbsolutePath();
+ File d = new File(s);
+ while(!d.equals(root)) {
+ vec.addElement(d.getName());
+ if((s = d.getParent()) == null) break;
+ d = new File(s);
+ }
+ String ret = null;
+ if(s != null) {
+ ret="/";
+ for(int i=vec.size()-1;i>=0;i--) ret += (String) vec.elementAt(i) + (i==0?"":"/");
+ }
+ return ret;
+ }
+
private File hostFile(String path) {
char sep = File.separatorChar;
if(sep != '/') {
private static File getParentFile(File f) {
String p = f.getParent();
- return p == null ? null : new File(f,p);
+ return p == null ? null : new File(p);
}
public class HostDirFD extends DirFD {
public void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { throw new ErrnoException(EROFS); }
public void unlink(UnixRuntime r, String path) throws ErrnoException { throw new ErrnoException(EROFS); }
- }
+ }
+
+
+ public static class ResourceFS extends FS {
+ final InodeCache inodes = new InodeCache(500);
+
+ public FStat lstat(UnixRuntime r, String path) throws ErrnoException { return stat(r,path); }
+ public void mkdir(UnixRuntime r, String path, int mode) throws ErrnoException { throw new ErrnoException(EROFS); }
+ public void unlink(UnixRuntime r, String path) throws ErrnoException { throw new ErrnoException(EROFS); }
+
+ FStat connFStat(final URLConnection conn) {
+ return new FStat() {
+ public int type() { return S_IFREG; }
+ public int nlink() { return 1; }
+ public int mode() { return 0444; }
+ public int size() { return conn.getContentLength(); }
+ public int mtime() { return (int)(conn.getDate() / 1000); }
+ public int inode() { return inodes.get(conn.getURL().toString()); }
+ public int dev() { return devno; }
+ };
+ }
+
+ public FStat stat(UnixRuntime r, String path) throws ErrnoException {
+ URL url = r.getClass().getResource("/" + path);
+ if(url == null) return null;
+ try {
+ return connFStat(url.openConnection());
+ } catch(IOException e) {
+ throw new ErrnoException(EIO);
+ }
+ }
+
+ public FD open(UnixRuntime r, String path, int flags, int mode) throws ErrnoException {
+ if((flags & ~3) != 0) {
+ if(STDERR_DIAG)
+ System.err.println("WARNING: Unsupported flags passed to ResourceFS.open(\"" + path + "\"): " + toHex(flags & ~3));
+ throw new ErrnoException(ENOTSUP);
+ }
+ if((flags&3) != RD_ONLY) throw new ErrnoException(EROFS);
+ URL url = r.getClass().getResource("/" + path);
+ if(url == null) return null;
+ try {
+ final URLConnection conn = url.openConnection();
+ Seekable.InputStream si = new Seekable.InputStream(conn.getInputStream());
+ return new SeekableFD(si,flags) { protected FStat _fstat() { return connFStat(conn); } };
+ } catch(FileNotFoundException e) {
+ if(e.getMessage() != null && e.getMessage().indexOf("Permission denied") >= 0) throw new ErrnoException(EACCES);
+ return null;
+ } catch(IOException e) { throw new ErrnoException(EIO); }
+ }
+ }
}