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;
}
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});
+ } catch(NoSuchMethodException e) {
+ m = null;
+ } catch(ClassNotFoundException e) {
+ m = null;
+ }
+ runtimeCompilerCompile = m;
+ }
+
+ public Class runtimeCompile(Seekable s) 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"});
+ } 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);
+ Class c = runtimeCompile(s);
+ 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 arg;
+ for(arg=2;arg<p;arg++) if(buf[arg] == ' ') break;
+ int cmdEnd = arg;
+ while(arg < p && buf[arg] == ' ') arg++;
+ String[] command = new String[] {
+ new String(buf,2,cmdEnd),
+ arg < p ? new String(buf,arg,p-arg) : 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 + 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++] = "/" + path;
+ for(int i=1;i<argv.length;i++) newArgv[p++] = argv[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;
}
}
- 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 {
projects / nestedvm.git / blobdiff