File gdb-0001-remove-alloca-0-calls.patch of Package gdb

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File gdb-0001-remove-alloca-0-calls.patch of Package gdb (Revision e4ee5f72d01ff581d74dfb9cc3a18fb9)

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Remove alloca(0) calls

PR gdb/24653 points out that a gcc snapshot will complain about the
calls to alloca(0) in gdb.

These calls are only needed when using the C alloca.  I'm inclined to
think that no current platform needs this, so this patch removes the
calls.

Let me know what you think.

gdb/ChangeLog
2019-06-14  Tom Tromey  <tromey@adacore.com>

PR gdb/24653:
	* regcache.c (registers_changed): Don't call alloca.
	* top.c (execute_command): Don't call alloca.

---
 gdb/ChangeLog  | 6 ++++++
 gdb/regcache.c | 7 -------
 gdb/top.c      | 4 ----
 3 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/gdb/regcache.c b/gdb/regcache.c
index 6e3eee96631..323f0f5ab4e 100644
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -454,13 +454,6 @@ void
 registers_changed (void)
 {
   registers_changed_ptid (minus_one_ptid);
-
-  /* Force cleanup of any alloca areas if using C alloca instead of
-     a builtin alloca.  This particular call is used to clean up
-     areas allocated by low level target code which may build up
-     during lengthy interactions between gdb and the target before
-     gdb gives control to the user (ie watchpoints).  */
-  alloca (0);
 }
 
 void
diff --git a/gdb/top.c b/gdb/top.c
index b46de90f755..857207c3767 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -560,10 +560,6 @@ execute_command (const char *p, int from_tty)
   auto cleanup_if_error = make_scope_exit (bpstat_clear_actions);
   scoped_value_mark cleanup = prepare_execute_command ();
 
-  /* Force cleanup of any alloca areas if using C alloca instead of
-     a builtin alloca.  */
-  alloca (0);
-
   /* This can happen when command_line_input hits end of file.  */
   if (p == NULL)
     {

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File gdb-0001-remove-alloca-0-calls.patch of Package gdb (Revision e4ee5f72d01ff581d74dfb9cc3a18fb9)

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