[binutils-gdb] More const use and alloca avoidance in coff-pe-read.c

[Tom Tromey <tromey@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=8095d37f71c20dd9e6cb90d4f42fb868867263ed

commit 8095d37f71c20dd9e6cb90d4f42fb868867263ed
Author: Tom Tromey <tromey@adacore.com>
Date:   Tue Apr 19 07:41:44 2022 -0600

    More const use and alloca avoidance in coff-pe-read.c
    
    This changes another function in coff-pe-read.c to use 'const' more,
    and to avoid the use of alloca by instead using std::string.

Diff:
---
 gdb/coff-pe-read.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/gdb/coff-pe-read.c b/gdb/coff-pe-read.c
index 5bf0e2dc7f0..d533a96ef6d 100644
--- a/gdb/coff-pe-read.c
+++ b/gdb/coff-pe-read.c
@@ -525,20 +525,20 @@ read_pe_exported_syms (minimal_symbol_reader &reader,
       /* First handle forward cases.  */
       if (func_rva >= export_rva && func_rva < export_rva + export_size)
 	{
-	  char *forward_name = (char *) (erva + func_rva);
-	  char *funcname = (char *) (erva + name_rva);
-	  char *forward_dll_name = forward_name;
-	  char *forward_func_name = forward_name;
-	  char *sep = strrchr (forward_name, '.');
-
-	  if (sep)
+	  const char *forward_name = (const char *) (erva + func_rva);
+	  const char *funcname = (const char *) (erva + name_rva);
+	  const char *forward_dll_name = forward_name;
+	  const char *forward_func_name = forward_name;
+	  const char *sep = strrchr (forward_name, '.');
+
+	  std::string name_storage;
+	  if (sep != nullptr)
 	    {
 	      int len = (int) (sep - forward_name);
 
-	      forward_dll_name = (char *) alloca (len + 1);
-	      strncpy (forward_dll_name, forward_name, len);
-	      forward_dll_name[len] = '\0';
-	      forward_func_name = ++sep;
+	      name_storage = std::string (forward_name, len);
+	      forward_dll_name = name_storage.c_str ();
+	      forward_func_name = sep + 1;
 	    }
 	  if (add_pe_forwarded_sym (reader, funcname, forward_dll_name,
 				    forward_func_name, ordinal,
@@ -552,7 +552,7 @@ read_pe_exported_syms (minimal_symbol_reader &reader,
 	  if ((func_rva >= section_data[sectix].rva_start)
 	      && (func_rva < section_data[sectix].rva_end))
 	    {
-	      char *sym_name = (char *) (erva + name_rva);
+	      const char *sym_name = (const char *) (erva + name_rva);
 
 	      section_found = 1;
 	      add_pe_exported_sym (reader, sym_name, func_rva, ordinal,
@@ -563,7 +563,7 @@ read_pe_exported_syms (minimal_symbol_reader &reader,
 	}
       if (!section_found)
 	{
-	  char *funcname = (char *) (erva + name_rva);
+	  const char *funcname = (const char *) (erva + name_rva);
 
 	  if (name_rva == 0)
 	    {