compat: remove glibcxx sanity checks

These checks were added in bitcoin#4339, (see also bitcoin#4081), to test
our back-compat stubs, however, those stubs no-longer exist (bitcoin#22930),
meaning that these checks are now just testing some specific standard
library behaviour, without a particular rationale, or reason, compared
to any other standard library functions we use.

There has also been some discussion about the sanity checks in the
context of the libbitcoinkernel refactoring, see
bitcoin#25065 (comment).
Removing the checks removes the need to worry about atleast the glibcxx
checks.

Also remove the list of check from the doc in init.h, because it is
incomplete, and anyone who wants to know what checks are included can
look at the function.

Author: fanquake

src/Makefile.am

@@ -139,7 +139,6 @@ BITCOIN_CORE_H = \
   compat/byteswap.h \
   compat/cpuid.h \
   compat/endian.h \
-  compat/sanity.h \
   compressor.h \
   consensus/consensus.h \
   consensus/tx_check.h \
@@ -629,15 +628,12 @@ libbitcoin_common_a_SOURCES = \
   $(BITCOIN_CORE_H)
 
 # util: shared between all executables.
-# This library *must* be included to make sure that the glibc
-# sanity checks are linked.
 libbitcoin_util_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_util_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_util_a_SOURCES = \
   support/lockedpool.cpp \
   chainparamsbase.cpp \
   clientversion.cpp \
-  compat/glibcxx_sanity.cpp \
   fs.cpp \
   interfaces/echo.cpp \
   interfaces/handler.cpp \
@@ -857,7 +853,6 @@ libbitcoinkernel_la_SOURCES = \
   chainparams.cpp \
   clientversion.cpp \
   coins.cpp \
-  compat/glibcxx_sanity.cpp \
   compressor.cpp \
   consensus/merkle.cpp \
   consensus/tx_check.cpp \

src/compat/glibcxx_sanity.cpp

@@ -14,7 +14,6 @@
 #include <blockfilter.h>
 #include <chain.h>
 #include <chainparams.h>
-#include <compat/sanity.h>
 #include <consensus/amount.h>
 #include <deploymentstatus.h>
 #include <fs.h>

src/compat/sanity.h

@@ -43,7 +43,7 @@ bool AppInitBasicSetup(const ArgsManager& args);
  */
 bool AppInitParameterInteraction(const ArgsManager& args, bool use_syscall_sandbox = true);
 /**
- * Initialization sanity checks: ecc init, sanity checks, dir lock.
+ * Initialization sanity checks.
  * @note This can be done before daemonization. Do not call Shutdown() if this function fails.
  * @pre Parameters should be parsed and config file should be read, AppInitParameterInteraction should have been called.
  */

src/init.cpp

@@ -7,7 +7,6 @@
 #endif
 
 #include <clientversion.h>
-#include <compat/sanity.h>
 #include <crypto/sha256.h>
 #include <fs.h>
 #include <key.h>
@@ -49,9 +48,6 @@ bool SanityChecks()
         return InitError(Untranslated("Elliptic curve cryptography sanity check failure. Aborting."));
     }
 
-    if (!glibcxx_sanity_test())
-        return false;
-
     if (!Random_SanityCheck()) {
         return InitError(Untranslated("OS cryptographic RNG sanity check failure. Aborting."));
     }

src/init.h

@@ -2,7 +2,6 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <compat/sanity.h>
 #include <key.h>
 #include <test/util/setup_common.h>
 #include <util/time.h>
@@ -13,7 +12,6 @@ BOOST_FIXTURE_TEST_SUITE(sanity_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(basic_sanity)
 {
-  BOOST_CHECK_MESSAGE(glibcxx_sanity_test() == true, "stdlib sanity test");
   BOOST_CHECK_MESSAGE(ECC_InitSanityCheck() == true, "secp256k1 sanity test");
   BOOST_CHECK_MESSAGE(ChronoSanityCheck() == true, "chrono epoch test");
 }