Add gcc-4.6. Synced to @180989

Change-Id: Ie3676586e1d8e3c8cd9f07d022f450d05fa08439
svn://gcc.gnu.org/svn/gcc/branches/google/gcc-4_6-mobile

1 files changed, 564 insertions, 0 deletions

diff --git a/gcc-4.6/gcc/java/jcf-io.c b/gcc-4.6/gcc/java/jcf-io.c
new file mode 100644
index 000000000..0dc761534
--- /dev/null
+++ b/gcc-4.6/gcc/java/jcf-io.c
@@ -0,0 +1,564 @@
+/* Utility routines for finding and reading Java(TM) .class files.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005,
+   2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  
+
+Java and all Java-based marks are trademarks or registered trademarks
+of Sun Microsystems, Inc. in the United States and other countries.
+The Free Software Foundation is independent of Sun Microsystems, Inc.  */
+
+/* Written by Per Bothner <bothner@cygnus.com>, February 1996. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+
+#include "jcf.h"
+#include "tree.h"
+#include "java-tree.h"
+#include "hashtab.h"
+#include <dirent.h>
+
+#include "zlib.h"
+
+int
+jcf_unexpected_eof (JCF *jcf, int count ATTRIBUTE_UNUSED)
+{
+  if (jcf->filename)
+    fprintf (stderr, "Premature end of .class file %s.\n", jcf->filename);
+  else
+    fprintf (stderr, "Premature end of .class file <stdin>.\n");
+  exit (-1);
+}
+
+void
+jcf_trim_old_input (JCF *jcf)
+{
+  int count = jcf->read_ptr - jcf->buffer;
+  if (count > 0)
+    {
+      memmove (jcf->buffer, jcf->read_ptr, jcf->read_end - jcf->read_ptr);
+      jcf->read_ptr -= count;
+      jcf->read_end -= count;
+    }
+}
+
+int
+jcf_filbuf_from_stdio (JCF *jcf, int count)
+{
+  FILE *file = (FILE*) (jcf->read_state);
+  if (count > jcf->buffer_end - jcf->read_ptr)
+    {
+      JCF_u4 old_read_ptr = jcf->read_ptr - jcf->buffer;
+      JCF_u4 old_read_end = jcf->read_end - jcf->buffer;
+      JCF_u4 old_size = jcf->buffer_end - jcf->buffer;
+      JCF_u4 new_size = (old_size == 0 ? 2000 : 2 * old_size) + count;
+      unsigned char *new_buffer
+	= jcf->buffer == NULL ? XNEWVAR (unsigned char, new_size)
+	: XRESIZEVAR (unsigned char, jcf->buffer, new_size);
+      jcf->buffer = new_buffer;
+      jcf->buffer_end = new_buffer + new_size;
+      jcf->read_ptr = new_buffer + old_read_ptr;
+      jcf->read_end = new_buffer + old_read_end;
+    }
+  count -= jcf->read_end - jcf->read_ptr;
+  if (count <= 0)
+    return 0;
+  if ((int) fread (jcf->read_end, 1, count, file) != count)
+    jcf_unexpected_eof (jcf, count);
+  jcf->read_end += count;
+  return 0;
+}
+
+#include "zipfile.h"
+
+struct ZipFile *SeenZipFiles = NULL;
+
+/* Open a zip file with the given name, and cache directory and file
+   descriptor.  If the file is missing, treat it as an empty archive.
+   Return NULL if the .zip file is malformed.
+*/
+
+ZipFile *
+opendir_in_zip (const char *zipfile, int is_system)
+{
+  struct ZipFile* zipf;
+  char magic [4];
+  int fd;
+  for (zipf = SeenZipFiles;  zipf != NULL;  zipf = zipf->next)
+    {
+      if (strcmp (zipf->name, zipfile) == 0)
+	return zipf;
+    }
+
+  zipf = XNEWVAR (struct ZipFile, sizeof (struct ZipFile) + strlen (zipfile) + 1);
+  zipf->next = SeenZipFiles;
+  zipf->name = (char*)(zipf+1);
+  strcpy (zipf->name, zipfile);
+  fd = open (zipfile, O_RDONLY | O_BINARY);
+  zipf->fd = fd;
+  if (fd < 0)
+    {
+      /* A missing zip file is not considered an error.
+       We may want to re-consider that.  FIXME. */
+      zipf->count = 0;
+      zipf->dir_size = 0;
+      zipf->central_directory = NULL;
+    }
+  else
+    {
+      jcf_dependency_add_file (zipfile, is_system);
+      if (read (fd, magic, 4) != 4 || GET_u4 (magic) != (JCF_u4)ZIPMAGIC)
+	{
+	  free (zipf);
+	  close (fd);
+	  return NULL;
+	}
+      lseek (fd, 0L, SEEK_SET);
+      if (read_zip_archive (zipf) != 0)
+	{
+	  free (zipf);
+	  close (fd);
+	  return NULL;
+	}
+    }
+
+  SeenZipFiles = zipf;  
+  return zipf;
+}
+
+/* Returns:
+   0:  OK - zipmember found.
+   -1: Not found.
+   -2: Malformed archive.
+*/
+
+int
+open_in_zip (JCF *jcf, const char *zipfile, const char *zipmember,
+	     int is_system)
+{
+  ZipDirectory *zipd;
+  int i, len;
+  ZipFile *zipf = opendir_in_zip (zipfile, is_system);
+
+  if (zipf == NULL)
+    return -2;
+
+  if (!zipmember)
+    return 0;
+
+  len = strlen (zipmember);
+  
+  zipd = (struct ZipDirectory*) zipf->central_directory;
+  for (i = 0; i < zipf->count; i++, zipd = ZIPDIR_NEXT (zipd))
+    {
+      if (len == zipd->filename_length &&
+	  strncmp (ZIPDIR_FILENAME (zipd), zipmember, len) == 0)
+	{
+	  JCF_ZERO (jcf);
+
+	  jcf->filename = xstrdup (zipfile);
+	  jcf->classname = xstrdup (zipmember);
+	  return read_zip_member(jcf, zipd, zipf);
+	}
+    }
+  return -1;
+}
+
+/* Read data from zip archive member. */
+
+int
+read_zip_member (JCF *jcf,  ZipDirectory *zipd, ZipFile *zipf)
+{
+  jcf->filbuf = jcf_unexpected_eof;
+  jcf->zipd = zipd;
+
+  if (zipd->compression_method == Z_NO_COMPRESSION)
+    {
+      jcf->buffer = XNEWVEC (unsigned char, zipd->size);
+      jcf->buffer_end = jcf->buffer + zipd->size;
+      jcf->read_ptr = jcf->buffer;
+      jcf->read_end = jcf->buffer_end;
+      if (lseek (zipf->fd, zipd->filestart, 0) < 0
+	  || read (zipf->fd, jcf->buffer, zipd->size) != (long) zipd->size)
+	return -2;
+    }
+  else
+    {
+      char *buffer;
+      z_stream d_stream; /* decompression stream */
+      d_stream.zalloc = (alloc_func) 0;
+      d_stream.zfree = (free_func) 0;
+      d_stream.opaque = (voidpf) 0;
+
+      jcf->buffer = XNEWVEC (unsigned char, zipd->uncompressed_size);
+      d_stream.next_out = jcf->buffer;
+      d_stream.avail_out = zipd->uncompressed_size;
+      jcf->buffer_end = jcf->buffer + zipd->uncompressed_size;
+      jcf->read_ptr = jcf->buffer;
+      jcf->read_end = jcf->buffer_end;
+      buffer = XNEWVEC (char, zipd->size);
+      d_stream.next_in = (unsigned char *) buffer;
+      d_stream.avail_in = zipd->size;
+      if (lseek (zipf->fd, zipd->filestart, 0) < 0
+	  || read (zipf->fd, buffer, zipd->size) != (long) zipd->size)
+	return -2;
+      /* Handle NO_HEADER using undocumented zlib feature.
+	 This is a very common hack.  */
+      inflateInit2 (&d_stream, -MAX_WBITS);
+      inflate (&d_stream, Z_NO_FLUSH);
+      inflateEnd (&d_stream);
+      free (buffer);
+    }
+
+  return 0;
+}
+
+const char *
+open_class (const char *filename, JCF *jcf, int fd, const char *dep_name)
+{
+  if (jcf)
+    {
+      struct stat stat_buf;
+      if (fstat (fd, &stat_buf) != 0
+	  || ! S_ISREG (stat_buf.st_mode))
+	{
+	  perror ("Could not figure length of .class file");
+	  return NULL;
+	}
+      if (dep_name != NULL)
+	jcf_dependency_add_file (dep_name, 0);
+      JCF_ZERO (jcf);
+      jcf->buffer = XNEWVEC (unsigned char, stat_buf.st_size);
+      jcf->buffer_end = jcf->buffer + stat_buf.st_size;
+      jcf->read_ptr = jcf->buffer;
+      jcf->read_end = jcf->buffer_end;
+      jcf->read_state = NULL;
+      jcf->filename = xstrdup (filename);
+      if (read (fd, jcf->buffer, stat_buf.st_size) != stat_buf.st_size)
+	{
+	  perror ("Failed to read .class file");
+	  return NULL;
+	}
+      close (fd);
+      jcf->filbuf = jcf_unexpected_eof;
+    }
+  else
+    close (fd);
+  return filename;
+}
+
+
+const char *
+find_classfile (char *filename, JCF *jcf, const char *dep_name)
+{
+  int fd = open (filename, O_RDONLY | O_BINARY);
+  if (fd < 0)
+    return NULL;
+  return open_class (filename, jcf, fd, dep_name);
+}
+
+/* Returns 1 if the CLASSNAME (really a char *) matches the name
+   stored in TABLE_ENTRY (also a char *).  */
+
+static int
+memoized_class_lookup_eq (const void *table_entry, const void *classname)
+{
+  return strcmp ((const char *)classname, (const char *)table_entry) == 0;
+}
+
+/* A hash table keeping track of class names that were not found
+   during class lookup.  (There is no need to cache the values
+   associated with names that were found; they are saved in
+   IDENTIFIER_CLASS_VALUE.)  */
+static htab_t memoized_class_lookups;
+
+/* Returns a freshly malloc'd string with the fully qualified pathname
+   of the .class file for the class CLASSNAME.  CLASSNAME must be
+   allocated in permanent storage; this function may retain a pointer
+   to it.  Returns NULL on failure.  If JCF != NULL, it is suitably
+   initialized.  SOURCE_OK is true if we should also look for .java
+   file. */
+
+const char *
+find_class (const char *classname, int classname_length, JCF *jcf)
+{
+  int fd;
+  int i, k, klass = -1;
+  struct stat class_buf;
+  char *dep_file;
+  void *entry;
+  int buflen;
+  char *buffer;
+  hashval_t hash;
+
+  /* Create the hash table, if it does not already exist.  */
+  if (!memoized_class_lookups)
+    memoized_class_lookups = htab_create (37, 
+					  htab_hash_string, 
+					  memoized_class_lookup_eq,
+					  NULL);
+
+  /* Loop for this class in the hashtable.  If it is present, we've
+     already looked for this class and failed to find it.  */
+  hash = htab_hash_string (classname);
+  if (htab_find_with_hash (memoized_class_lookups, classname, hash))
+    return NULL;
+
+  /* Allocate and zero out the buffer, since we don't explicitly put a
+     null pointer when we're copying it below.  */
+  buflen = jcf_path_max_len () + classname_length + 10;
+  buffer = XNEWVAR (char, buflen);
+  memset (buffer, 0, buflen);
+
+  for (entry = jcf_path_start (); entry != NULL; entry = jcf_path_next (entry))
+    {
+      const char *path_name = jcf_path_name (entry);
+      if (klass != 0)
+	{
+	  int dir_len;
+
+	  strcpy (buffer, path_name);
+	  i = strlen (buffer);
+
+	  /* This is right because we know that `.zip' entries will have a
+	     trailing slash.  See jcf-path.c.  */
+	  dir_len = i - 1;
+
+	  for (k = 0; k < classname_length; k++, i++)
+	    {
+	      char ch = classname[k];
+	      buffer[i] = ch == '.' ? '/' : ch;
+	    }
+	  strcpy (buffer+i, ".class");
+
+	  if (jcf_path_is_zipfile (entry))
+	    {
+	      int err_code;
+	      JCF _jcf;
+	      buffer[dir_len] = '\0';
+	      SOURCE_FRONTEND_DEBUG 
+		(("Trying [...%s]:%s", 
+		  &buffer[dir_len-(dir_len > 15 ? 15 : dir_len)], 
+		  buffer+dir_len+1));
+	      if (jcf == NULL)
+		jcf = &_jcf;
+	      err_code = open_in_zip (jcf, buffer, buffer+dir_len+1,
+				      jcf_path_is_system (entry));
+	      if (err_code == 0)
+		{
+		  /* Should we check if .zip is out-of-date wrt .java? */
+		  buffer[dir_len] = '(';
+		  strcpy (buffer+i, ".class)");
+		  if (jcf == &_jcf)
+		    JCF_FINISH (jcf);
+		  return buffer;
+		}
+	      else
+		continue;
+	    }
+	  klass = stat (buffer, &class_buf);
+	}
+    }
+
+  dep_file = buffer;
+  if (!klass)
+    {
+      SOURCE_FRONTEND_DEBUG ((stderr, "[Class selected: %s]\n",
+			      classname+classname_length-
+			      (classname_length <= 30 ? 
+			       classname_length : 30)));
+      fd = JCF_OPEN_EXACT_CASE (buffer, O_RDONLY | O_BINARY);
+      if (fd >= 0)
+	goto found;
+    }
+
+  free (buffer);
+
+  /* Remember that this class could not be found so that we do not
+     have to look again.  */
+  *htab_find_slot_with_hash (memoized_class_lookups, classname, hash, INSERT)
+    = (void *) CONST_CAST (char *, classname);
+
+  return NULL;
+ found:
+  {
+    const char *const tmp = open_class (buffer, jcf, fd, dep_file);
+    jcf->classname = xstrdup (classname);
+    return tmp;
+  }
+}
+
+void
+jcf_print_char (FILE *stream, int ch)
+{
+  switch (ch)
+    {
+    case '\'':
+    case '\\':
+    case '\"':
+      fprintf (stream, "\\%c", ch);
+      break;
+    case '\n':
+      fprintf (stream, "\\n");
+      break;
+    case '\t':
+      fprintf (stream, "\\t");
+      break;
+    case '\r':
+      fprintf (stream, "\\r");
+      break;
+    default:
+      if (ch >= ' ' && ch < 127)
+	putc (ch, stream);
+      else if (ch < 256)
+	fprintf (stream, "\\%03x", ch);
+      else
+	fprintf (stream, "\\u%04x", ch);
+    }
+}
+
+/* Print UTF8 string at STR of length LENGTH bytes to STREAM. */
+
+void
+jcf_print_utf8 (FILE *stream, const unsigned char *str, int length)
+{
+  const unsigned char * limit = str + length;
+  while (str < limit)
+    {
+      int ch = UTF8_GET (str, limit);
+      if (ch < 0)
+	{
+	  fprintf (stream, "\\<invalid>");
+	  return;
+	}
+      jcf_print_char (stream, ch);
+    }
+}
+
+/* Same as jcf_print_utf8, but print IN_CHAR as OUT_CHAR. */
+
+void
+jcf_print_utf8_replace (FILE *stream, const unsigned char *str, int length,
+			int in_char, int out_char)
+{
+  const unsigned char *limit = str + length;
+  while (str < limit)
+    {
+      int ch = UTF8_GET (str, limit);
+      if (ch < 0)
+	{
+	  fprintf (stream, "\\<invalid>");
+	  return;
+	}
+      jcf_print_char (stream, ch == in_char ? out_char : ch);
+    }
+}
+
+/* Check that all the cross-references in the constant pool are
+   valid.  Returns 0 on success.
+   Otherwise, returns the index of the (first) invalid entry.
+   Only checks internal consistency, but does not check that
+   any classes, fields, or methods are valid.*/
+
+int
+verify_constant_pool (JCF *jcf)
+{
+  int i, n;
+  for (i = 1; i < JPOOL_SIZE (jcf); i++)
+    {
+      switch (JPOOL_TAG (jcf, i))
+	{
+	case CONSTANT_NameAndType:
+	  n = JPOOL_USHORT2 (jcf, i);
+	  if (n <= 0 || n >= JPOOL_SIZE(jcf)
+	      || JPOOL_TAG (jcf, n) != CONSTANT_Utf8)
+	    return i;
+	  /* ... fall through ... */
+	case CONSTANT_Class:
+	case CONSTANT_String:
+	  n = JPOOL_USHORT1 (jcf, i);
+	  if (n <= 0 || n >= JPOOL_SIZE(jcf)
+	      || JPOOL_TAG (jcf, n) != CONSTANT_Utf8)
+	    return i;
+	  break;
+	case CONSTANT_Fieldref:
+	case CONSTANT_Methodref:
+	case CONSTANT_InterfaceMethodref:
+	  n = JPOOL_USHORT1 (jcf, i);
+	  if (n <= 0 || n >= JPOOL_SIZE(jcf)
+	      || JPOOL_TAG (jcf, n) != CONSTANT_Class)
+	    return i;
+	  n = JPOOL_USHORT2 (jcf, i);
+	  if (n <= 0 || n >= JPOOL_SIZE(jcf)
+	      || JPOOL_TAG (jcf, n) != CONSTANT_NameAndType)
+	    return i;
+	  break;
+	case CONSTANT_Long:
+	case CONSTANT_Double:
+	  i++;
+	  break;
+	case CONSTANT_Float:
+	case CONSTANT_Integer:
+	case CONSTANT_Utf8:
+	case CONSTANT_Unicode:
+	  break;
+	default:
+	  return i;
+	}
+    }
+  return 0;
+}
+
+void
+format_uint (char *buffer, uint64 value, int base)
+{
+#define WRITE_BUF_SIZE (4 + sizeof(uint64) * 8)
+  char buf[WRITE_BUF_SIZE];
+  char *buf_ptr = buf+WRITE_BUF_SIZE; /* End of buf. */
+  int chars_written;
+  int i;
+
+  /* Now do the actual conversion, placing the result at the *end* of buf. */
+  /* Note this code does not pretend to be optimized. */
+  do {
+    int digit = value % base;
+    static const char digit_chars[] = "0123456789abcdefghijklmnopqrstuvwxyz";
+    *--buf_ptr = digit_chars[digit];
+    value /= base;
+  } while (value != 0);
+
+  chars_written = buf+WRITE_BUF_SIZE - buf_ptr;
+  for (i = 0; i < chars_written; i++)
+    buffer[i] = *buf_ptr++;
+  buffer[i] = 0;
+}
+
+void
+format_int (char *buffer, jlong value, int base)
+{
+  uint64 abs_value;
+  if (value < 0)
+    {
+      abs_value = -(uint64)value;
+      *buffer++ = '-';
+    }
+  else
+    abs_value = (uint64) value;
+  format_uint (buffer, abs_value, base);
+}