Re: Lists and aliasing (Re: Freeze on 27 February)

["Vladimir 'φ-coder/phcoder' Serbinenko" <phcoder@gmail.com>]

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On 22.02.2012 17:25, Lennart Sorensen wrote:
> On Wed, Feb 22, 2012 at 11:18:54AM -0500, Lennart Sorensen wrote:
>> Well it is in WARN_FLAGS and TARGET_CFLAGS in configure.
>>
>> And during build:
>> gcc-4.4 -DHAVE_CONFIG_H -I. -I../..  -Wall -W -I./include -DGRUB_UTIL=1 -DGRUB_LIBDIR=\"/usr/lib/grub\" -DLOCALEDIR=\"/usr/share/locale\"  -DGRUB_MACHINE_EMU=1 -DGRUB_MACHINE=POWERPC_EMU -DGRUB_TARGET_CPU_POWERPC=1 -DGRUB_FILE=\"util/grub-mkimage.c\" -I. -I../.. -I. -I../.. -I../../include -I./include -I./grub-core/gnulib -I../../grub-core/gnulib -DGRUB_PKGLIBROOTDIR=\"/usr/lib/grub\"   -g -Wall -O2 -Wall -W -Wshadow -Wold-style-declaration -Wold-style-definition -Wpointer-arith -Wundef -Wextra -Waddress -Warray-bounds -Wattributes -Wbuiltin-macro-redefined -Wcast-align -Wchar-subscripts -Wclobbered -Wcomment -Wcoverage-mismatch -Wdeprecated -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wempty-body -Wendif-labels -Wfloat-equal -Wformat-contains-nul -Wformat-extra-args -Wformat-security -Wformat-y2k -Wignored-qualifiers -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wunsafe-loop-optimizations -Wlogical-op -Wmain -Wmissing-braces -W
>> missing-field-initializers -Wmissing-format-attribute -Wmissing-noreturn -Wmudflap -Wmultichar -Wnonnull -Woverflow -Wpacked-bitfield-compat -Wparentheses -Wpointer-arith -Wpointer-to-int-cast -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wstrict-aliasing -Wswitch -Wsync-nand -Wtrigraphs  -Wtype-limits -Wundef -Wuninitialized -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-result -Wunused-value  -Wunused-variable -Wvariadic-macros -Wvolatile-register-var -Wwrite-strings -Wmissing-declarations -Wmissing-parameter-type  -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -Wpointer-sign -Wno-undef -Wno-sign-compare -Wno-unused -Wno-unused-parameter -Wno-redundant-decls -Wno-unreachable-code -Wno-conversion -Wno-old-style-definition   -c -o util/grub_mkimage-grub-mkimage.o `test -f 'util/grub-mkimage.c' || echo '../../'`util/grub-mkimage.c
>> In file included from ../../util/grub-mkimage.c:45:
>> ../../grub-core/gnulib/argp.h:610: warning: no previous prototype for 'argp_usage'
>> ../../grub-core/gnulib/argp.h:616: warning: no previous prototype for '_option_is_short'
>> ../../grub-core/gnulib/argp.h:628: warning: no previous prototype for '_option_is_end'
>>
>> So something sure adds it.
> That actually looks like a mistake.
>
> HOST_CFLAGS="$HOST_CFLAGS $WARN_FLAGS"
> TARGET_CFLAGS="$TARGET_CFLAGS $WARN_FLAGS -g -Wredundant-decls -Wmissing-prototypes"
>
> but WARN_FLAGS="-Wall -W -Wshadow -Wold-style-declaration -Wold-style-definition -Wpointer-arith -Wundef -Wextra -Waddress -Warray-bounds -Wattributes -Wbuiltin-macro-redefined -Wcast-align -Wchar-subscripts -Wclobbered -Wcomment -Wcoverage-mismatch -Wdeprecated -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wempty-body -Wendif-labels -Wfloat-equal -Wformat-contains-nul -Wformat-extra-args -Wformat-security -Wformat-y2k -Wignored-qualifiers -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wunsafe-loop-optimizations -Wlogical-op -Wmain -Wmissing-braces -Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-noreturn -Wmudflap -Wmultichar -Wnonnull -Woverflow -Wpacked-bitfield-compat -Wparentheses -Wpointer-arith -Wpointer-to-int-cast -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wstrict-aliasing -Wswitch -Wsync-nand -Wtrigraphs  -Wtype-limits -Wundef -Wuninitialized -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-result -Wunused-value  -Wunused-variable -Wvariadic-macros -Wvolatile-register-var -Wwrite-strings -Wmissing-declarations -Wmissing-parameter-type  -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -Wpointer-sign"
>
> So by having -Wmissing-prototypes in WARN_FLAGS it gets set twice in
> TARGET_CFLAGS and also set once in HOST_CFLAGS.  Perhaps that was
> not meant to be in there and should only have been in TARGET_CFLAGS.
>


-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko


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=== modified file 'conf/Makefile.common'
--- conf/Makefile.common	2012-02-22 15:27:39 +0000
+++ conf/Makefile.common	2012-02-22 16:29:31 +0000
@@ -104,7 +104,7 @@
 CFLAGS_GCRY = -Wno-error -Wno-missing-field-initializers
 CPPFLAGS_GCRY = -I$(top_srcdir)/grub-core/lib/libgcrypt_wrap
 
-CFLAGS_GNULIB = -Wno-undef -Wno-sign-compare -Wno-unused -Wno-unused-parameter -Wno-redundant-decls -Wno-unreachable-code -Wno-conversion -Wno-old-style-definition
+CFLAGS_GNULIB = -Wno-undef -Wno-sign-compare -Wno-unused -Wno-unused-parameter -Wno-redundant-decls -Wno-unreachable-code -Wno-conversion -Wno-old-style-definition -Wno-unsafe-loop-optimisations
 CPPFLAGS_GNULIB = -I$(top_builddir)/grub-core/gnulib -I$(top_srcdir)/grub-core/gnulib
 
 CFLAGS_POSIX = -fno-builtin

=== modified file 'configure.ac'
--- configure.ac	2012-02-22 03:56:45 +0000
+++ configure.ac	2012-02-22 16:32:32 +0000
@@ -377,7 +377,7 @@
 LIBS=""
 
 # debug flags.
-WARN_FLAGS="-Wall -W -Wshadow -Wold-style-declaration -Wold-style-definition -Wpointer-arith -Wundef -Wextra -Waddress -Warray-bounds -Wattributes -Wbuiltin-macro-redefined -Wcast-align -Wchar-subscripts -Wclobbered -Wcomment -Wcoverage-mismatch -Wdeprecated -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wempty-body -Wendif-labels -Wfloat-equal -Wformat-contains-nul -Wformat-extra-args -Wformat-security -Wformat-y2k -Wignored-qualifiers -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wunsafe-loop-optimizations -Wlogical-op -Wmain -Wmissing-braces -Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-noreturn -Wmudflap -Wmultichar -Wnonnull -Woverflow -Wpacked-bitfield-compat -Wparentheses -Wpointer-arith -Wpointer-to-int-cast -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wstrict-aliasing -Wswitch -Wsync-nand -Wtrigraphs  -Wtype-limits -Wundef -Wuninitialized -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value  -Wunused-variable -Wvariadic-macros -Wvolatile-register-var -Wwrite-strings -Wmissing-declarations -Wmissing-parameter-type  -Wmissing-prototypes -Wnested-externs -Wstrict-prototypes -Wpointer-sign"
+WARN_FLAGS="-Wall -W -Wshadow -Wold-style-declaration -Wold-style-definition -Wpointer-arith -Wundef -Wextra -Waddress -Warray-bounds -Wattributes -Wbuiltin-macro-redefined -Wcast-align -Wchar-subscripts -Wclobbered -Wcomment -Wcoverage-mismatch -Wdeprecated -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wempty-body -Wendif-labels -Wfloat-equal -Wformat-contains-nul -Wformat-extra-args -Wformat-security -Wformat-y2k -Wignored-qualifiers -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wunsafe-loop-optimizations -Wlogical-op -Wmain -Wmissing-braces -Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-noreturn -Wmudflap -Wmultichar -Wnonnull -Woverflow -Wpacked-bitfield-compat -Wparentheses -Wpointer-arith -Wpointer-to-int-cast -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wstrict-aliasing -Wswitch -Wsync-nand -Wtrigraphs  -Wtype-limits -Wundef -Wuninitialized -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value  -Wunused-variable -Wvariadic-macros -Wvolatile-register-var -Wwrite-strings -Wmissing-declarations -Wmissing-parameter-type -Wnested-externs -Wstrict-prototypes -Wpointer-sign"
 HOST_CFLAGS="$HOST_CFLAGS $WARN_FLAGS"
 TARGET_CFLAGS="$TARGET_CFLAGS $WARN_FLAGS -g -Wredundant-decls -Wmissing-prototypes"
 TARGET_CCASFLAGS="$TARGET_CCASFLAGS -g"

=== modified file 'grub-core/commands/legacycfg.c'
--- grub-core/commands/legacycfg.c	2012-02-12 14:25:25 +0000
+++ grub-core/commands/legacycfg.c	2012-02-22 16:06:00 +0000
@@ -547,11 +547,11 @@
 check_password_md5_real (const char *entered,
 			 struct legacy_md5_password *pw)
 {
-  int enteredlen = grub_strlen (entered);
+  grub_size_t enteredlen = grub_strlen (entered);
   unsigned char alt_result[MD5_HASHLEN];
   unsigned char *digest;
   grub_uint8_t ctx[GRUB_MD_MD5->contextsize];
-  int i;
+  grub_size_t i;
 
   GRUB_MD_MD5->init (ctx);
   GRUB_MD_MD5->write (ctx, entered, enteredlen);

=== modified file 'grub-core/commands/testload.c'
--- grub-core/commands/testload.c	2012-02-22 04:04:54 +0000
+++ grub-core/commands/testload.c	2012-02-22 16:25:36 +0000
@@ -77,19 +77,24 @@
   grub_printf ("Reading %s sequentially again", argv[0]);
   grub_file_seek (file, 0);
 
-  for (pos = 0; pos < size; pos += GRUB_DISK_SECTOR_SIZE)
+  for (pos = 0; pos < size;)
     {
       char sector[GRUB_DISK_SECTOR_SIZE];
-
-      if (grub_file_read (file, sector, GRUB_DISK_SECTOR_SIZE)
-	  != GRUB_DISK_SECTOR_SIZE)
+      grub_size_t curlen = GRUB_DISK_SECTOR_SIZE;
+
+      if (curlen > size - pos)
+	curlen = size - pos;
+
+      if (grub_file_read (file, sector, curlen)
+	  != (grub_ssize_t) curlen)
 	goto fail;
 
-      if (grub_memcmp (sector, buf + pos, GRUB_DISK_SECTOR_SIZE) != 0)
+      if (grub_memcmp (sector, buf + pos, curlen) != 0)
 	{
 	  grub_printf ("\nDiffers in %lld\n", (unsigned long long) pos);
 	  goto fail;
 	}
+      pos += curlen;
     }
   grub_printf (" Done.\n");
 

=== modified file 'grub-core/disk/ldm.c'
--- grub-core/disk/ldm.c	2012-02-10 11:36:02 +0000
+++ grub-core/disk/ldm.c	2012-02-22 15:59:21 +0000
@@ -831,7 +831,7 @@
 {
   struct grub_diskfilter_pv *pv = NULL;
   struct grub_diskfilter_vg *vg = NULL;
-  struct grub_diskfilter_lv *res, *lv;
+  struct grub_diskfilter_lv *res = 0, *lv, *res_lv;
 
   pv = grub_diskfilter_get_pv_from_disk (disk, &vg);
 
@@ -844,19 +844,21 @@
 	&& lv->segments->nodes->pv == pv
 	&& lv->segments->nodes->start + pv->start_sector == start)
       {
-	res = lv;
+	res_lv = lv;
 	break;
       }
+  if (!res_lv)
+    return NULL;
   for (lv = vg->lvs; lv; lv = lv->next)
     if (lv->segment_count == 1 && lv->segments->node_count == 1
 	&& lv->segments->type == GRUB_DISKFILTER_MIRROR
-	&& lv->segments->nodes->lv == lv)
+	&& lv->segments->nodes->lv == res_lv)
       {
 	res = lv;
 	break;
       }
-  if (res->fullname)
-    return grub_strdup (lv->fullname);
+  if (res && res->fullname)
+    return grub_strdup (res->fullname);
   return NULL;
 }
 

=== modified file 'grub-core/fs/zfs/zfs_sha256.c'
--- grub-core/fs/zfs/zfs_sha256.c	2010-12-01 21:55:26 +0000
+++ grub-core/fs/zfs/zfs_sha256.c	2012-02-22 16:17:39 +0000
@@ -129,7 +129,7 @@
   for (i = 0; i < 8; i++)
     pad[padsize++] = (size << 3) >> (56 - 8 * i);
   
-  for (i = 0; i < padsize; i += 64)
+  for (i = 0; i < padsize && i <= 64; i += 64)
     SHA256Transform(H, pad + i);
   
   zcp->zc_word[0] = grub_cpu_to_zfs64 ((grub_uint64_t)H[0] << 32 | H[1], 

=== modified file 'grub-core/io/gzio.c'
--- grub-core/io/gzio.c	2012-02-12 14:25:25 +0000
+++ grub-core/io/gzio.c	2012-02-22 16:45:45 +0000
@@ -363,6 +363,8 @@
   0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
 };
 
+#pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations"
+
 #define NEEDBITS(n) do {while(k<(n)){b|=((ulg)get_byte(gzio))<<k;k+=8;}} while (0)
 #define DUMPBITS(n) do {b>>=(n);k-=(n);} while (0)
 

=== modified file 'grub-core/lib/LzmaEnc.c'
--- grub-core/lib/LzmaEnc.c	2012-02-10 15:48:48 +0000
+++ grub-core/lib/LzmaEnc.c	2012-02-22 16:16:26 +0000
@@ -1211,7 +1211,7 @@
       {
         UInt32 i;
         reps[0] = prevOpt->backs[pos];
-        for (i = 1; i <= pos; i++)
+        for (i = 1; i < pos + 1; i++)
           reps[i] = prevOpt->backs[i - 1];
         for (; i < LZMA_NUM_REPS; i++)
           reps[i] = prevOpt->backs[i];

=== modified file 'grub-core/normal/cmdline.c'
--- grub-core/normal/cmdline.c	2012-02-12 18:24:23 +0000
+++ grub-core/normal/cmdline.c	2012-02-22 16:21:47 +0000
@@ -49,13 +49,13 @@
       /* Remove the lines that don't fit in the new buffer.  */
       if (newsize < hist_used)
 	{
-	  int i;
-	  int delsize = hist_used - newsize;
+	  grub_size_t i;
+	  grub_size_t delsize = hist_used - newsize;
 	  hist_used = newsize;
 
-	  for (i = 1; i <= delsize; i++)
+	  for (i = 1; i < delsize + 1; i++)
 	    {
-	      int pos = hist_end - i;
+	      grub_ssize_t pos = hist_end - i;
 	      if (pos < 0)
 		pos += hist_size;
 	      grub_free (old_hist_lines[pos]);

=== modified file 'grub-core/script/parser.y'
--- grub-core/script/parser.y	2012-02-10 15:48:48 +0000
+++ grub-core/script/parser.y	2012-02-22 16:47:55 +0000
@@ -31,6 +31,7 @@
 #include "grub_script.tab.h"
 
 #pragma GCC diagnostic ignored "-Wunreachable-code"
+#pragma GCC diagnostic ignored "-Wmissing-declarations"
 %}
 
 %union {

=== modified file 'grub-core/script/yylex.l'
--- grub-core/script/yylex.l	2012-02-03 10:56:49 +0000
+++ grub-core/script/yylex.l	2012-02-22 16:49:25 +0000
@@ -27,6 +27,8 @@
 
 #pragma GCC diagnostic ignored "-Wunused-parameter"
 #pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#pragma GCC diagnostic ignored "-Wmissing-declarations"
+#pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations"
 
 #define yyfree    grub_lexer_yyfree
 #define yyalloc   grub_lexer_yyalloc

=== modified file 'util/grub-mkfont.c'
--- util/grub-mkfont.c	2012-02-10 12:31:43 +0000
+++ util/grub-mkfont.c	2012-02-22 16:15:31 +0000
@@ -717,7 +717,7 @@
 
       bitmap = glyph->bitmap;
       mask = 0x80;
-      for (y = ymax - 1; y >= ymin; y--)
+      for (y = ymax - 1; y > ymin - 1; y--)
 	{
 	  int line_pos;