[binutils-gdb] Use TOLOWER in SYMBOL_HASH_NEXT

[Pedro Alves <palves at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=deeeba559bd0c18e06dba19f44571ee8a218fcdb

commit deeeba559bd0c18e06dba19f44571ee8a218fcdb
Author: Pedro Alves <palves@redhat.com>
Date:   Sat Nov 25 00:33:05 2017 +0000

    Use TOLOWER in SYMBOL_HASH_NEXT
    
    The support for setting breakpoint in functions with ABI tags patch
    will add a use of SYMBOL_HASH_NEXT in cp-support.c, which fails to
    compile with:
    
      src/gdb/cp-support.c:38:0:
      src/gdb/cp-support.c: In function â??unsigned int cp_search_name_hash(const char*)â??:
      src/gdb/../include/safe-ctype.h:148:20: error: â??do_not_use_tolower_with_safe_ctypeâ?? was not declared in this scope
       #define tolower(c) do_not_use_tolower_with_safe_ctype
    		      ^
      src/gdb/minsyms.h:174:18: note: in expansion of macro â??tolowerâ??
         ((hash) * 67 + tolower ((unsigned char) (c)) - 113)
    		    ^
      src/gdb/cp-support.c:1677:14: note: in expansion of macro â??SYMBOL_HASH_NEXTâ??
    	 hash = SYMBOL_HASH_NEXT (hash, *string);
    		^
    
    This fixes the problem before it happens.
    
    I was somewhat worried about whether this might have an impact with
    languages that are case insensitive, but I convinced myself that it
    doesn't.  As bonus, this improves GDB's minsym interning performance a
    bit (3%-10%).  See
    <https://sourceware.org/ml/gdb/2017-11/msg00021.html>.
    
    gdb/ChangeLog:
    2017-11-25  Pedro Alves  <palves@redhat.com>
    
    	* dictionary.c: Include "safe-ctype.h".
    	* minsyms.c: Include "safe-ctype.h".
    	* minsyms.c (SYMBOL_HASH_NEXT): Use TOLOWER instead of tolower.

Diff:
---
 gdb/ChangeLog    | 6 ++++++
 gdb/dictionary.c | 1 +
 gdb/minsyms.c    | 1 +
 gdb/minsyms.h    | 2 +-
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4e0b45e..61db1b1 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-25  Pedro Alves  <palves@redhat.com>
+
+	* dictionary.c: Include "safe-ctype.h".
+	* minsyms.c: Include "safe-ctype.h".
+	* minsyms.c (SYMBOL_HASH_NEXT): Use TOLOWER instead of tolower.
+
 2017-11-25   Pedro Alves  <palves@redhat.com>
 
 	* completer.c (complete_line_internal_1): Skip spaces until the
diff --git a/gdb/dictionary.c b/gdb/dictionary.c
index fb30753..7d26efb 100644
--- a/gdb/dictionary.c
+++ b/gdb/dictionary.c
@@ -26,6 +26,7 @@
 #include "symtab.h"
 #include "buildsym.h"
 #include "dictionary.h"
+#include "safe-ctype.h"
 
 /* This file implements dictionaries, which are tables that associate
    symbols to names.  They are represented by an opaque type 'struct
diff --git a/gdb/minsyms.c b/gdb/minsyms.c
index a0d3bd5..4898da1 100644
--- a/gdb/minsyms.c
+++ b/gdb/minsyms.c
@@ -52,6 +52,7 @@
 #include "cli/cli-utils.h"
 #include "symbol.h"
 #include <algorithm>
+#include "safe-ctype.h"
 
 /* See minsyms.h.  */
 
diff --git a/gdb/minsyms.h b/gdb/minsyms.h
index f326be9..5c0dde4 100644
--- a/gdb/minsyms.h
+++ b/gdb/minsyms.h
@@ -177,7 +177,7 @@ unsigned int msymbol_hash_iw (const char *);
    requirements.  */
 
 #define SYMBOL_HASH_NEXT(hash, c)			\
-  ((hash) * 67 + tolower ((unsigned char) (c)) - 113)
+  ((hash) * 67 + TOLOWER ((unsigned char) (c)) - 113)