[binutils-gdb] Avoid two uninitialized warnings from gcc

[Tom Tromey <tromey at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=875e539851bb2702f3292f819e220545a8776242

commit 875e539851bb2702f3292f819e220545a8776242
Author: Tom Tromey <tom@tromey.com>
Date:   Wed Oct 3 16:01:12 2018 -0600

    Avoid two uninitialized warnings from gcc
    
    This avoids a couple of uninitialized warnings from gcc by
    initializing the object in question.  The one in coffread.c seems like
    it could be a latent bug.  The one in scm-value.c is harmless, but GCC
    can't see that.
    
    gdb/ChangeLog
    2018-10-03  Tom Tromey  <tom@tromey.com>
    
    	* guile/scm-value.c (gdbscm_value_to_string): Initialize
    	"buffer_contents".
    	* coffread.c (coff_symtab_read): Initialize "newobj".

Diff:
---
 gdb/ChangeLog         | 6 ++++++
 gdb/coffread.c        | 2 +-
 gdb/guile/scm-value.c | 3 ++-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7753110..d426c88 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2018-10-03  Tom Tromey  <tom@tromey.com>
+
+	* guile/scm-value.c (gdbscm_value_to_string): Initialize
+	"buffer_contents".
+	* coffread.c (coff_symtab_read): Initialize "newobj".
+
 2018-10-03  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* dwarf2read.c (read_func_scope): Remove struct keyword in
diff --git a/gdb/coffread.c b/gdb/coffread.c
index 81465d6..623467d 100644
--- a/gdb/coffread.c
+++ b/gdb/coffread.c
@@ -781,7 +781,7 @@ coff_symtab_read (minimal_symbol_reader &reader,
 		  struct objfile *objfile)
 {
   struct gdbarch *gdbarch = get_objfile_arch (objfile);
-  struct context_stack *newobj;
+  struct context_stack *newobj = nullptr;
   struct coff_symbol coff_symbol;
   struct coff_symbol *cs = &coff_symbol;
   static struct internal_syment main_sym;
diff --git a/gdb/guile/scm-value.c b/gdb/guile/scm-value.c
index 1855860..ca0c075 100644
--- a/gdb/guile/scm-value.c
+++ b/gdb/guile/scm-value.c
@@ -966,7 +966,8 @@ gdbscm_value_to_string (SCM self, SCM rest)
   int encoding_arg_pos = -1, errors_arg_pos = -1, length_arg_pos = -1;
   char *encoding = NULL;
   SCM errors = SCM_BOOL_F;
-  gdb_byte *buffer_contents;
+  /* Avoid an uninitialized warning from gcc.  */
+  gdb_byte *buffer_contents = nullptr;
   int length = -1;
   const char *la_encoding = NULL;
   struct type *char_type = NULL;