From 77f0e5e38ef2d84b74b543b69c36a8d6441d4c10 Mon Sep 17 00:00:00 2001
From: Leo Yuriev <leo@yuriev.ru>
Date: Sat, 27 May 2017 20:03:46 +0300
Subject: [PATCH] mdbx: drop unused debug features.

---
 mdbx.h       |  7 +------
 src/mdbx.c   | 28 +++-------------------------
 test/test.cc |  2 +-
 3 files changed, 5 insertions(+), 32 deletions(-)

diff --git a/mdbx.h b/mdbx.h
index 45668cf6..07fa432e 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -1550,16 +1550,11 @@ LIBMDBX_API MDBX_oom_func *mdbx_env_get_oomfunc(MDBX_env *env);
 #define MDBX_DBG_TRACE 4
 #define MDBX_DBG_EXTRA 8
 #define MDBX_DBG_AUDIT 16
-#define MDBX_DBG_EDGE 32
-
-/* LY: a "don't touch" value */
-#define MDBX_DBG_DNT (-1L)
 
 typedef void MDBX_debug_func(int type, const char *function, int line,
                              const char *msg, va_list args);
 
-LIBMDBX_API int mdbx_setup_debug(int flags, MDBX_debug_func *logger,
-                                 long edge_txn);
+LIBMDBX_API int mdbx_setup_debug(int flags, MDBX_debug_func *logger);
 
 typedef int MDBX_pgvisitor_func(uint64_t pgno, unsigned pgnumber, void *ctx,
                                 const char *dbi, const char *type, int nentries,
diff --git a/src/mdbx.c b/src/mdbx.c
index c2cf517f..4042969e 100644
--- a/src/mdbx.c
+++ b/src/mdbx.c
@@ -502,12 +502,6 @@ int mdbx_runtime_flags = MDBX_DBG_PRINT
 
 MDBX_debug_func *mdbx_debug_logger;
 
-int mdbx_setup_debug(int flags, MDBX_debug_func *logger, long edge_txn);
-
-#if MDBX_DEBUG
-txnid_t mdbx_debug_edge;
-#endif
-
 static int mdbx_page_alloc(MDBX_cursor *mc, int num, MDBX_page **mp, int flags);
 static int mdbx_page_new(MDBX_cursor *mc, uint32_t flags, int num,
                          MDBX_page **mp);
@@ -2276,15 +2270,6 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
     txn->mt_canary = meta->mm_canary;
     const txnid_t snap = mdbx_meta_txnid_stable(env, meta);
     txn->mt_txnid = snap + 1;
-#if MDBX_DEBUG
-    if (unlikely(txn->mt_txnid == mdbx_debug_edge)) {
-      if (!mdbx_debug_logger)
-        mdbx_runtime_flags |=
-            MDBX_DBG_TRACE | MDBX_DBG_EXTRA | MDBX_DBG_AUDIT | MDBX_DBG_ASSERT;
-      mdbx_debug_log(MDBX_DBG_EDGE, __FUNCTION__, __LINE__,
-                     "on/off edge (txn %" PRIaTXN ")", txn->mt_txnid);
-    }
-#endif
     if (unlikely(txn->mt_txnid < snap)) {
       mdbx_debug("txnid overflow!");
       rc = MDBX_TXN_FULL;
@@ -9566,17 +9551,10 @@ int __cold mdbx_reader_check0(MDBX_env *env, int rdt_locked, int *dead) {
   return rc;
 }
 
-int __cold mdbx_setup_debug(int flags, MDBX_debug_func *logger, long edge_txn) {
+int __cold mdbx_setup_debug(int flags, MDBX_debug_func *logger) {
   unsigned ret = mdbx_runtime_flags;
-  if (flags != (int)MDBX_DBG_DNT)
-    mdbx_runtime_flags = flags;
-  if (logger != (MDBX_debug_func *)MDBX_DBG_DNT)
-    mdbx_debug_logger = logger;
-  if (edge_txn != (long)MDBX_DBG_DNT) {
-#if MDBX_DEBUG
-    mdbx_debug_edge = edge_txn;
-#endif
-  }
+  mdbx_runtime_flags = flags;
+  mdbx_debug_logger = logger;
   return ret;
 }
 
diff --git a/test/test.cc b/test/test.cc
index 44d59209..0d29ad8e 100644
--- a/test/test.cc
+++ b/test/test.cc
@@ -119,7 +119,7 @@ void testcase::db_prepare() {
     mdbx_dbg_opts |= MDBX_DBG_TRACE;
   if (config.params.loglevel <= logging::verbose)
     mdbx_dbg_opts |= MDBX_DBG_PRINT;
-  int rc = mdbx_setup_debug(mdbx_dbg_opts, mdbx_debug_logger, MDBX_DBG_DNT);
+  int rc = mdbx_setup_debug(mdbx_dbg_opts, mdbx_debug_logger);
   log_info("set mdbx debug-opts: 0x%02x", rc);
 
   MDBX_env *env = nullptr;