memmon_tracing.diff

diff -r 35ff8e3c8093 Makefile
--- a/Makefile	Mon Jul 22 06:08:14 2019 -0400
+++ b/Makefile	Fri Mar 20 09:34:00 2020 -0400
@@ -9,7 +9,7 @@
 	gcc memmon.c -shared -o memmon.so -fPIC -I/usr/include/lua$(LUA_VERSION)/ -Wall -Werror
 
 lua-memmon: memmon.c lua52.c
-	gcc -Wall -Werror -DLUA_COMPAT_ALL -O0 memmon.c lua52.c -o lua-memmon -fPIC -I/usr/include/lua5.2/ /usr/lib/x86_64-linux-gnu/liblua5.2.so -ldl -lm -Wl,-dynamic-list,exports.txt
+	gcc -Wall -Werror -DENABLE_MALLOC_TRACE -DLUA_COMPAT_ALL -O0 memmon.c lua52.c -o lua-memmon -fPIC -I/usr/include/lua5.2/ /usr/lib/x86_64-linux-gnu/liblua5.2.so -ldl -lm -Wl,-dynamic-list,exports.txt
 	@echo
 	@echo Update first line of \"$(shell which prosody || echo /usr/bin/prosody)\" to have this shebang:
 	@echo
diff -r 35ff8e3c8093 memmon.c
--- a/memmon.c	Mon Jul 22 06:08:14 2019 -0400
+++ b/memmon.c	Fri Mar 20 09:34:00 2020 -0400
@@ -173,7 +173,8 @@
 // OUR CUSTOM MALLOC FUNCTIONS
 
 #ifdef ENABLE_MALLOC_TRACE
-	#define MALLOC_TRACE(...) do { switch_to_libc(); printf(__VA_ARGS__); switch_to_custom(); } while(0);
+	static FILE *trace_file = NULL;
+	#define MALLOC_TRACE(...) do { switch_to_libc(); if (!trace_file) { trace_file = fopen("trace.log", "w"); } fprintf(trace_file, __VA_ARGS__); switch_to_custom(); } while(0);
 	static void switch_to_libc();
 #else
 	#define MALLOC_TRACE(...) do {} while(0);