Examples with Substitute com.oracle.svm.core.annotate.Substitute used on opensource projects

Example 6 with Substitute

use of com.oracle.svm.core.annotate.Substitute in project graal by oracle.

the class PosixJavaIOSubstitutions method setPermission.

@Substitute
public boolean setPermission(File f, int access, boolean enable, boolean owneronly) {
    int amode = 0;
    if (access == Target_java_io_FileSystem.ACCESS_READ) {
        amode = owneronly ? S_IRUSR() : S_IRUSR() | S_IRGRP() | S_IROTH();
    } else if (access == Target_java_io_FileSystem.ACCESS_WRITE) {
        amode = owneronly ? S_IWUSR() : S_IWUSR() | S_IWGRP() | S_IWOTH();
    } else if (access == Target_java_io_FileSystem.ACCESS_EXECUTE) {
        amode = owneronly ? S_IXUSR() : S_IXUSR() | S_IXGRP() | S_IXOTH();
    } else {
        throw VMError.shouldNotReachHere("illegal access mode");
    }
    stat stat = StackValue.get(SizeOf.get(stat.class));
    try (CCharPointerHolder pathPin = CTypeConversion.toCString(f.getPath())) {
        CCharPointer pathPtr = pathPin.get();
        if (stat(pathPtr, stat) == 0) {
            int newMode;
            if (enable) {
                newMode = stat.st_mode() | amode;
            } else {
                newMode = stat.st_mode() & ~amode;
            }
            if (chmod(pathPtr, newMode) >= 0) {
                return true;
            }
        }
    }
    return false;
}

Example 7 with Substitute

use of com.oracle.svm.core.annotate.Substitute in project graal by oracle.

the class PosixJavaIOSubstitutions method list.

@Substitute
public String[] list(File f) {
    DIR dir;
    try (CCharPointerHolder pathPin = CTypeConversion.toCString(f.getPath())) {
        CCharPointer pathPtr = pathPin.get();
        dir = opendir(pathPtr);
    }
    if (dir.isNull()) {
        return null;
    }
    List<String> entries = new ArrayList<>();
    dirent dirent = StackValue.get(SizeOf.get(dirent.class) + PATH_MAX() + 1);
    direntPointer resultDirent = StackValue.get(SizeOf.get(direntPointer.class));
    while (readdir_r(dir, dirent, resultDirent) == 0 && !resultDirent.read().isNull()) {
        String name = CTypeConversion.toJavaString(dirent.d_name());
        if (name.equals(".") || name.equals("..")) {
            continue;
        }
        entries.add(name);
    }
    closedir(dir);
    return entries.toArray(new String[entries.size()]);
}

Example 8 with Substitute

use of com.oracle.svm.core.annotate.Substitute in project graal by oracle.

the class PosixJavaIOSubstitutions method length.

@Substitute
public long length() throws IOException {
    SignedWord cur = WordFactory.zero();
    SignedWord end = WordFactory.zero();
    int handle = PosixUtils.getFDHandle(fd);
    if ((cur = lseek(handle, WordFactory.zero(), SEEK_CUR())).equal(WordFactory.signed(-1))) {
        throw new IOException(lastErrorString("Seek failed"));
    } else if ((end = lseek(handle, WordFactory.zero(), SEEK_END())).equal(WordFactory.signed(-1))) {
        throw new IOException(lastErrorString("Seek failed"));
    } else if (lseek(handle, cur, SEEK_SET()).equal(WordFactory.signed(-1))) {
        throw new IOException(lastErrorString("Seek failed"));
    }
    return end.rawValue();
}

Example 9 with Substitute

use of com.oracle.svm.core.annotate.Substitute in project graal by oracle.

the class PosixJavaIOSubstitutions method setLength.

@Substitute
public void setLength(long newLength) throws IOException {
    SignedWord cur;
    int handle = PosixUtils.getFDHandle(fd);
    if ((cur = lseek(handle, WordFactory.zero(), SEEK_CUR())).equal(WordFactory.signed(-1))) {
        throw new IOException(lastErrorString("setLength failed"));
    }
    if (ftruncate(handle, newLength) == -1) {
        throw new IOException(lastErrorString("setLength failed"));
    }
    if (cur.greaterThan(WordFactory.signed(newLength))) {
        if (lseek(handle, WordFactory.zero(), SEEK_END()).equal(WordFactory.signed(-1))) {
            throw new IOException(lastErrorString("setLength failed"));
        }
    } else {
        if (lseek(handle, cur, SEEK_SET()).equal(WordFactory.signed(-1))) {
            throw new IOException(lastErrorString("setLength failed"));
        }
    }
}

Example 10 with Substitute

use of com.oracle.svm.core.annotate.Substitute in project graal by oracle.

the class PosixJavaLangSubstitutions method forkAndExec.

/*
     * NOTE: This implementation uses simple fork() and exec() calls. However, OpenJDK uses
     * posix_spawn() on some platforms, specifically on Solaris to avoid swap exhaustion when memory
     * is reserved conservatively for the fork'ed process. That implementation is more complex and
     * requires a helper tool to cleanly launch the actual target executable.
     */
@Substitute
@SuppressWarnings({ "unused", "static-method" })
int forkAndExec(int mode, byte[] helperpath, byte[] file, byte[] argBlock, int argCount, byte[] envBlock, int envCount, byte[] dir, int[] fds, boolean redirectErrorStream) throws IOException {
    int[] pipes = new int[8];
    Arrays.fill(pipes, -1);
    try (// 
    PinnedObject filePin = PinnedObject.create(file);
        PinnedObject dirPin = PinnedObject.create(dir);
        PinnedObject argBlockPin = PinnedObject.create(argBlock);
        PinnedObject argvPin = PinnedObject.create(new CCharPointerPointer[argCount + 2]);
        PinnedObject envBlockPin = PinnedObject.create(envBlock);
        PinnedObject envpPin = PinnedObject.create(new CCharPointerPointer[envCount + 1]);
        // 
        PinnedObject pipesPin = PinnedObject.create(pipes)) {
        CCharPointerPointer argv = argvPin.addressOfArrayElement(0);
        argv.write(0, filePin.addressOfArrayElement(0));
        Java_lang_UNIXProcess_Supplement.gatherCStringPointers(argBlockPin.addressOfArrayElement(0), argBlock.length, argv.addressOf(1), argCount + 1);
        CCharPointerPointer envp = WordFactory.nullPointer();
        if (envBlock != null) {
            envp = envpPin.addressOfArrayElement(0);
            Java_lang_UNIXProcess_Supplement.gatherCStringPointers(envBlockPin.addressOfArrayElement(0), envBlock.length, envp.addressOf(0), envCount + 1);
        }
        CIntPointer[] stdioPipes = new CIntPointer[3];
        for (int i = 0; i <= 2; i++) {
            if (fds[i] == -1) {
                stdioPipes[i] = pipesPin.addressOfArrayElement(2 * i);
                if (Unistd.pipe(stdioPipes[i]) < 0) {
                    throw new IOException("pipe() failed");
                }
            }
        }
        CIntPointer failPipe = pipesPin.addressOfArrayElement(2 * stdioPipes.length);
        if (Unistd.pipe(failPipe) < 0) {
            throw new IOException("pipe() failed");
        }
        int[] childStdioFds = new int[3];
        childStdioFds[0] = (fds[0] != -1) ? fds[0] : stdioPipes[0].read(0);
        childStdioFds[1] = (fds[1] != -1) ? fds[1] : stdioPipes[1].read(1);
        childStdioFds[2] = (fds[2] != -1) ? fds[2] : stdioPipes[2].read(1);
        int childFailFd = failPipe.read(1);
        CCharPointer filep = filePin.addressOfArrayElement(0);
        CCharPointer dirp = (dir != null) ? dirPin.addressOfArrayElement(0) : WordFactory.nullPointer();
        int childPid = Java_lang_UNIXProcess_Supplement.doForkAndExec(filep, dirp, argv, envp, childStdioFds, childFailFd);
        if (childPid < 0) {
            throw new IOException("fork() failed");
        }
        // If we are here, we are the parent.
        // store fds of our pipe ends for caller, close unused fds (those of the child)
        fds[0] = fds[1] = fds[2] = -1;
        if (stdioPipes[0].isNonNull()) {
            fds[0] = stdioPipes[0].read(1);
            Unistd.close(stdioPipes[0].read(0));
        }
        if (stdioPipes[1].isNonNull()) {
            fds[1] = stdioPipes[1].read(0);
            Unistd.close(stdioPipes[1].read(1));
        }
        if (stdioPipes[2].isNonNull()) {
            fds[2] = stdioPipes[2].read(0);
            Unistd.close(stdioPipes[2].read(1));
        }
        Unistd.close(failPipe.read(1));
        // read status from child
        final int intSize = SizeOf.get(CIntPointer.class);
        CIntPointer pErrno = StackValue.get(intSize);
        SignedWord failBytes = Java_lang_UNIXProcess_Supplement.readEntirely(failPipe.read(0), pErrno, WordFactory.unsigned(intSize));
        Unistd.close(failPipe.read(0));
        if (failBytes.equal(0)) {
            // success: pipe closed during exec()
            return childPid;
        } else if (failBytes.equal(SizeOf.get(CIntPointer.class))) {
            int errbuflen = 256;
            try (PinnedObject errbuf = PinnedObject.create(new byte[errbuflen])) {
                CCharPointer detailCstr = Errno.strerror_r(pErrno.read(), errbuf.addressOfArrayElement(0), WordFactory.unsigned(errbuflen));
                String detail = CTypeConversion.toJavaString(detailCstr);
                throw new IOException("error=" + pErrno.read() + ", " + detail);
            }
        } else {
            throw new IOException("unexpected data from child");
        }
    } catch (IOException e) {
        // NOTE: not a finally statement because when successful, some pipes need to stay open
        for (int fd : pipes) {
            if (fd != -1) {
                Unistd.close(fd);
            }
        }
        throw e;
    }
}