Remove the built-in memory guard support.

* configure.ac (--enable-m-guard): Remove.
* src/global.c (_gcry_vcontrol): Return GPG_ERR_NOT_SUPPORTED for
GCRYCTL_ENABLE_M_GUARD.
* src/stdmem.c (use_m_guard, _gcry_private_enable_m_guard): Remove.
(_gcry_private_malloc): Remove the code path with use_m_guard==1.
(_gcry_private_malloc_secure): Likewise.
(_gcry_private_realloc, _gcry_private_free): Likewise.
(_gcry_private_check_heap): Remove.
* src/stdmem.h: Remove declarations for memory guard functions.

--

GnuPG-bug-id: T5822
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

1 files changed, 2 insertions, 6 deletions

diff --git a/doc/gcrypt.texi b/doc/gcrypt.texi
index 92eb5024..25d2f951 100644
--- a/doc/gcrypt.texi
+++ b/doc/gcrypt.texi
@@ -652,12 +652,8 @@ arguments can or have to be provided.
 
 @table @code
 @item GCRYCTL_ENABLE_M_GUARD; Arguments: none
-This command enables the built-in memory guard.  It must not be used
-to activate the memory guard after the memory management has already
-been used; therefore it can ONLY be used before
-@code{gcry_check_version}.  Note that the memory guard is NOT used
-when the user of the library has set his own memory management
-callbacks.
+This command was to enable the built-in memory guard, but not supported
+any more.
 
 @item GCRYCTL_ENABLE_QUICK_RANDOM; Arguments: none
 This command inhibits the use the very secure random quality level