Fix non-throwing operator new failure checks being optimized away.

ext/Makefile

@@ -7,7 +7,7 @@ OPTLEVEL?=$(DEFAULT_OPTLEVEL)
 CXXFLAGS?=$(OPTLEVEL)
 
 CPPFLAGS:=$(CPPFLAGS) -DVERSIONSTR=\"$(VERSION)\"
-CXXFLAGS:=$(CXXFLAGS) -Wall -Wextra -fno-exceptions -fno-rtti
+CXXFLAGS:=$(CXXFLAGS) -Wall -Wextra -fno-exceptions -fno-rtti -fcheck-new
 
 LIBS:=$(LIBS)
 

games/Makefile

@@ -9,7 +9,7 @@ CFLAGS?=$(OPTLEVEL)
 CXXFLAGS?=$(OPTLEVEL)
 
 CFLAGS:=$(CFLAGS) -Wall -Wextra
-CXXFLAGS:=$(CXXFLAGS) -Wall -Wextra -fno-exceptions -fno-rtti
+CXXFLAGS:=$(CXXFLAGS) -Wall -Wextra -fno-exceptions -fno-rtti -fcheck-new
 
 BINARIES:=\
 asteroids \

kernel/Makefile

@@ -13,7 +13,7 @@ CXXFLAGS?=$(OPTLEVEL)
 
 CPPFLAGS:=$(CPPFLAGS) -I. -Iinclude -D__is_sortix_kernel
 CXXFLAGS:=$(CXXFLAGS) -Wall -Wextra -ffreestanding -fbuiltin -std=gnu++11 \
-                      -fno-exceptions -fno-rtti
+                      -fno-exceptions -fno-rtti -fcheck-new
 
 ifeq ($(PANIC_SHORT),1)
     CPPFLAGS:=$(CPPFLAGS) -DPANIC_SHORT

kernel/op-new.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2012, 2013 Jonas 'Sortie' Termansen.
+ * Copyright (c) 2011, 2012, 2013, 2022 Jonas 'Sortie' Termansen.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -20,6 +20,10 @@
 #include <stddef.h>
 #include <stdlib.h>
 
+#ifdef __clang__
+#warning "security: -fcheck-new might not work on clang"
+#endif
+
 void* operator new(size_t size)
 {
 	return malloc(size);

libc/Makefile

@@ -12,7 +12,7 @@ CPPINCLUDES=-Iinclude
 CPPFLAGS=-D__is_sortix_libc $(CPPINCLUDES)
 FLAGS=-Wall -Wextra -ffreestanding $(OPTLEVEL)
 CFLAGS=-std=gnu11 -Wstrict-prototypes -Werror=implicit-function-declaration
-CXXFLAGS=-std=gnu++11 -fno-exceptions -fno-rtti
+CXXFLAGS=-std=gnu++11 -fno-exceptions -fno-rtti -fcheck-new
 ASFLAGS=
 
 FREEOBJS=\

trianglix/Makefile

@@ -7,7 +7,7 @@ include ../build-aux/dirs.mak
 OPTLEVEL?=-g -O2
 CXXFLAGS?=$(OPTLEVEL)
 
-CXXFLAGS:=$(CXXFLAGS) -std=gnu++11 -Wall -Wextra -fno-exceptions -fno-rtti
+CXXFLAGS:=$(CXXFLAGS) -std=gnu++11 -Wall -Wextra -fno-exceptions -fno-rtti -fcheck-new
 
 BINARY:=trianglix