jdk8-mips64-public/hotspot: src/share/tools/launcher/wildcard.c@bad3bed4b323 (annotated)

src/share/tools/launcher/wildcard.c@bad3bed4b323 (annotated)

src/share/tools/launcher/wildcard.c

Fri, 29 Mar 2013 14:18:40 -0700

author: ccheung
date: Fri, 29 Mar 2013 14:18:40 -0700
changeset 4887: bad3bed4b323
parent 2327: cb2d0a362639
permissions: -rw-r--r--

8006006: [parfait] Memory leak at hotspot/src/share/tools/launcher/wildcard.c
Summary: a simple fix to add FileList_free(fl) before returning NULL.
Reviewed-by: zgu, coleenp, minqi

 /*
  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 /*
  * Class-Path Wildcards
  *
  * The syntax for wildcards is a single asterisk. The class path
  * foo/"*", e.g., loads all jar files in the directory named foo.
  * (This requires careful quotation when used in shell scripts.)
  *
  * Only files whose names end in .jar or .JAR are matched.
  * Files whose names end in .zip, or which have a particular
  * magic number, regardless of filename extension, are not
  * matched.
  *
  * Files are considered regardless of whether or not they are
  * "hidden" in the UNIX sense, i.e., have names beginning with '.'.
  *
  * A wildcard only matches jar files, not class files in the same
  * directory.  If you want to load both class files and jar files from
  * a single directory foo then you can say foo:foo/"*", or foo/"*":foo
  * if you want the jar files to take precedence.
  *
  * Subdirectories are not searched recursively, i.e., foo/"*" only
  * looks for jar files in foo, not in foo/bar, foo/baz, etc.
  *
  * Expansion of wildcards is done early, prior to the invocation of a
  * program's main method, rather than late, during the class-loading
  * process itself.  Each element of the input class path containing a
  * wildcard is replaced by the (possibly empty) sequence of elements
  * generated by enumerating the jar files in the named directory.  If
  * the directory foo contains a.jar, b.jar, and c.jar,
  * e.g., then the class path foo/"*" is expanded into
  * foo/a.jar:foo/b.jar:foo/c.jar, and that string would be the value
  * of the system property java.class.path.
  *
  * The order in which the jar files in a directory are enumerated in
  * the expanded class path is not specified and may vary from platform
  * to platform and even from moment to moment on the same machine.  A
  * well-constructed application should not depend upon any particular
  * order.  If a specific order is required then the jar files can be
  * enumerated explicitly in the class path.
  *
  * The CLASSPATH environment variable is not treated any differently
  * from the -classpath (equiv. -cp) command-line option,
  * i.e. wildcards are honored in all these cases.
  *
  * Class-path wildcards are not honored in the Class-Path jar-manifest
  * header.
  *
  * Class-path wildcards are honored not only by the Java launcher but
  * also by most other command-line tools that accept class paths, and
  * in particular by javac and javadoc.
  *
  * Class-path wildcards are not honored in any other kind of path, and
  * especially not in the bootstrap class path, which is a mere
  * artifact of our implementation and not something that developers
  * should use.
  *
  * Classpath wildcards are only expanded in the Java launcher code,
  * supporting the use of wildcards on the command line and in the
  * CLASSPATH environment variable.  We do not support the use of
  * wildcards by applications that embed the JVM.
  */
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
 #include "java.h"       /* Strictly for PATH_SEPARATOR/FILE_SEPARATOR */
 #include "jli_util.h"
 #ifdef _WIN32
 #include <windows.h>
 #else /* Unix */
 #include <unistd.h>
 #include <dirent.h>
 #endif /* Unix */
 static int
 exists(const char* filename)
 {
 #ifdef _WIN32
     return _access(filename, 0) == 0;
 #else
     return access(filename, F_OK) == 0;
 #endif
 }
 #define NEW_(TYPE) ((TYPE) JLI_MemAlloc(sizeof(struct TYPE##_)))
 /*
  * Wildcard directory iteration.
  * WildcardIterator_for(wildcard) returns an iterator.
  * Each call to that iterator's next() method returns the basename
  * of an entry in the wildcard's directory.  The basename's memory
  * belongs to the iterator.  The caller is responsible for prepending
  * the directory name and file separator, if necessary.
  * When done with the iterator, call the close method to clean up.
  */
 typedef struct WildcardIterator_* WildcardIterator;
 #ifdef _WIN32
 struct WildcardIterator_
 {
     HANDLE handle;
     char *firstFile; /* Stupid FindFirstFile...FindNextFile */
 };
 static WildcardIterator
 WildcardIterator_for(const char *wildcard)
 {
     WIN32_FIND_DATA find_data;
     WildcardIterator it = NEW_(WildcardIterator);
     HANDLE handle = FindFirstFile(wildcard, &find_data);
     if (handle == INVALID_HANDLE_VALUE)
         return NULL;
     it->handle = handle;
     it->firstFile = find_data.cFileName;
     return it;
 }
 static char *
 WildcardIterator_next(WildcardIterator it)
 {
     WIN32_FIND_DATA find_data;
     if (it->firstFile != NULL) {
         char *firstFile = it->firstFile;
         it->firstFile = NULL;
         return firstFile;
     }
     return FindNextFile(it->handle, &find_data)
         ? find_data.cFileName : NULL;
 }
 static void
 WildcardIterator_close(WildcardIterator it)
 {
     if (it) {
         FindClose(it->handle);
         JLI_MemFree(it->firstFile);
         JLI_MemFree(it);
     }
 }
 #else /* Unix */
 struct WildcardIterator_
 {
     DIR *dir;
 };
 static WildcardIterator
 WildcardIterator_for(const char *wildcard)
 {
     DIR *dir;
     int wildlen = strlen(wildcard);
     if (wildlen < 2) {
         dir = opendir(".");
     } else {
         char *dirname = JLI_StringDup(wildcard);
         dirname[wildlen - 1] = '\0';
         dir = opendir(dirname);
         JLI_MemFree(dirname);
     }
     if (dir == NULL)
         return NULL;
     else {
         WildcardIterator it = NEW_(WildcardIterator);
         it->dir = dir;
         return it;
     }
 }
 static char *
 WildcardIterator_next(WildcardIterator it)
 {
     struct dirent* dirp = readdir(it->dir);
     return dirp ? dirp->d_name : NULL;
 }
 static void
 WildcardIterator_close(WildcardIterator it)
 {
     if (it) {
         closedir(it->dir);
         JLI_MemFree(it);
     }
 }
 #endif /* Unix */
 static int
 equal(const char *s1, const char *s2)
 {
     return strcmp(s1, s2) == 0;
 }
 /*
  * FileList ADT - a dynamic list of C filenames
  */
 struct FileList_
 {
     char **files;
     int size;
     int capacity;
 };
 typedef struct FileList_ *FileList;
 static FileList
 FileList_new(int capacity)
 {
     FileList fl = NEW_(FileList);
     fl->capacity = capacity;
     fl->files = (char **) JLI_MemAlloc(capacity * sizeof(fl->files[0]));
     fl->size = 0;
     return fl;
 }
 #ifdef DEBUG_WILDCARD
 static void
 FileList_print(FileList fl)
 {
     int i;
     putchar('[');
     for (i = 0; i < fl->size; i++) {
         if (i > 0) printf(", ");
         printf("\"%s\"",fl->files[i]);
     }
     putchar(']');
 }
 #endif
 static void
 FileList_free(FileList fl)
 {
     if (fl) {
         if (fl->files) {
             int i;
             for (i = 0; i < fl->size; i++)
                 JLI_MemFree(fl->files[i]);
             JLI_MemFree(fl->files);
         }
         JLI_MemFree(fl);
     }
 }
 static void
 FileList_ensureCapacity(FileList fl, int capacity)
 {
     if (fl->capacity < capacity) {
         while (fl->capacity < capacity)
             fl->capacity *= 2;
         fl->files = JLI_MemRealloc(fl->files,
                                fl->capacity * sizeof(fl->files[0]));
     }
 }
 static void
 FileList_add(FileList fl, char *file)
 {
     FileList_ensureCapacity(fl, fl->size+1);
     fl->files[fl->size++] = file;
 }
 static void
 FileList_addSubstring(FileList fl, const char *beg, int len)
 {
     char *filename = (char *) JLI_MemAlloc(len+1);
     memcpy(filename, beg, len);
     filename[len] = '\0';
     FileList_ensureCapacity(fl, fl->size+1);
     fl->files[fl->size++] = filename;
 }
 static char *
 FileList_join(FileList fl, char sep)
 {
     int i;
     int size;
     char *path;
     char *p;
     for (i = 0, size = 1; i < fl->size; i++)
         size += strlen(fl->files[i]) + 1;
     path = JLI_MemAlloc(size);
     for (i = 0, p = path; i < fl->size; i++) {
         int len = strlen(fl->files[i]);
         if (i > 0) *p++ = sep;
         memcpy(p, fl->files[i], len);
         p += len;
     }
     *p = '\0';
     return path;
 }
 static FileList
 FileList_split(const char *path, char sep)
 {
     const char *p, *q;
     int len = strlen(path);
     int count;
     FileList fl;
     for (count = 1, p = path; p < path + len; p++)
         count += (*p == sep);
     fl = FileList_new(count);
     for (p = path;;) {
         for (q = p; q <= path + len; q++) {
             if (*q == sep || *q == '\0') {
                 FileList_addSubstring(fl, p, q - p);
                 if (*q == '\0')
                     return fl;
                 p = q + 1;
             }
         }
     }
 }
 static int
 isJarFileName(const char *filename)
 {
     int len = strlen(filename);
     return (len >= 4) &&
         (filename[len - 4] == '.') &&
         (equal(filename + len - 3, "jar") ||
          equal(filename + len - 3, "JAR")) &&
         /* Paranoia: Maybe filename is "DIR:foo.jar" */
         (strchr(filename, PATH_SEPARATOR) == NULL);
 }
 static char *
 wildcardConcat(const char *wildcard, const char *basename)
 {
     int wildlen = strlen(wildcard);
     int baselen = strlen(basename);
     char *filename = (char *) JLI_MemAlloc(wildlen + baselen);
     /* Replace the trailing '*' with basename */
     memcpy(filename, wildcard, wildlen-1);
     memcpy(filename+wildlen-1, basename, baselen+1);
     return filename;
 }
 static FileList
 wildcardFileList(const char *wildcard)
 {
     const char *basename;
     FileList fl = FileList_new(16);
     WildcardIterator it = WildcardIterator_for(wildcard);
     if (it == NULL) {
         FileList_free(fl);
         return NULL;
     }
     while ((basename = WildcardIterator_next(it)) != NULL)
         if (isJarFileName(basename))
             FileList_add(fl, wildcardConcat(wildcard, basename));
     WildcardIterator_close(it);
     return fl;
 }
 static int
 isWildcard(const char *filename)
 {
     int len = strlen(filename);
     return (len > 0) &&
         (filename[len - 1] == '*') &&
         (len == 1 || IS_FILE_SEPARATOR(filename[len - 2])) &&
         (! exists(filename));
 }
 static void
 FileList_expandWildcards(FileList fl)
 {
     int i, j;
     for (i = 0; i < fl->size; i++) {
         if (isWildcard(fl->files[i])) {
             FileList expanded = wildcardFileList(fl->files[i]);
             if (expanded != NULL && expanded->size > 0) {
                 JLI_MemFree(fl->files[i]);
                 FileList_ensureCapacity(fl, fl->size + expanded->size);
                 for (j = fl->size - 1; j >= i+1; j--)
                     fl->files[j+expanded->size-1] = fl->files[j];
                 for (j = 0; j < expanded->size; j++)
                     fl->files[i+j] = expanded->files[j];
                 i += expanded->size - 1;
                 fl->size += expanded->size - 1;
                 /* fl expropriates expanded's elements. */
                 expanded->size = 0;
             }
             FileList_free(expanded);
         }
     }
 }
 const char *
 JLI_WildcardExpandClasspath(const char *classpath)
 {
     char *expanded;
     FileList fl;
     if (strchr(classpath, '*') == NULL)
         return classpath;
     fl = FileList_split(classpath, PATH_SEPARATOR);
     FileList_expandWildcards(fl);
     expanded = FileList_join(fl, PATH_SEPARATOR);
     FileList_free(fl);
     if (getenv("_JAVA_LAUNCHER_DEBUG") != 0)
         printf("Expanded wildcards:\n"
                "    before: \"%s\"\n"
                "    after : \"%s\"\n",
                classpath, expanded);
     return expanded;
 }
 #ifdef DEBUG_WILDCARD
 static void
 wildcardExpandArgv(const char ***argv)
 {
     int i;
     for (i = 0; (*argv)[i]; i++) {
         if (equal((*argv)[i], "-cp") ||
             equal((*argv)[i], "-classpath")) {
             i++;
             (*argv)[i] = wildcardExpandClasspath((*argv)[i]);
         }
     }
 }
 static void
 debugPrintArgv(char *argv[])
 {
     int i;
     putchar('[');
     for (i = 0; argv[i]; i++) {
         if (i > 0) printf(", ");
         printf("\"%s\"", argv[i]);
     }
     printf("]\n");
 }
 int
 main(int argc, char *argv[])
 {
     argv[0] = "java";
     wildcardExpandArgv((const char***)&argv);
     debugPrintArgv(argv);
     /* execvp("java", argv); */
     return 0;
 }
 #endif /* DEBUG_WILDCARD */
 /* Cute little perl prototype implementation....
 my $sep = ($^O =~ /^(Windows|cygwin)/) ? ";" : ":";
 sub expand($) {
   opendir DIR, $_[0] or return $_[0];
   join $sep, map {"$_[0]/$_"} grep {/\.(jar|JAR)$/} readdir DIR;
 }
 sub munge($) {
   join $sep,
     map {(! -r $_ and s/[\/\\]+\*$//) ? expand $_ : $_} split $sep, $_[0];
 }
 for (my $i = 0; $i < @ARGV - 1; $i++) {
   $ARGV[$i+1] = munge $ARGV[$i+1] if $ARGV[$i] =~ /^-c(p|lasspath)$/;
 }
 $ENV{CLASSPATH} = munge $ENV{CLASSPATH} if exists $ENV{CLASSPATH};
 @ARGV = ("java", @ARGV);
 print "@ARGV\n";
 exec @ARGV;
 */

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/tools/launcher/wildcard.c@bad3bed4b323 (annotated)

src/share/tools/launcher/wildcard.c