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support replacing C++ new/delete implementation

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This adds support for sanity checks based on sized deallocation and will
reduce the overhead of calls through the C++ allocator.
This commit is contained in:
Daniel Micay 2018-09-19 13:57:35 -04:00
parent 3dc49f8f73
commit e6e9ac1fc9
3 changed files with 101 additions and 0 deletions
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9
Makefile
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@ -1,14 +1,23 @@
CONFIG_CXX_ALLOCATOR := true
CPPFLAGS := -D_GNU_SOURCE
CFLAGS := -std=c11 -Wall -Wextra -Wmissing-prototypes -O2 -flto -fPIC -fvisibility=hidden -fno-plt -pipe
CXXFLAGS := -std=c++14 -Wall -Wextra -O2 -flto -fPIC -fvisibility=hidden -fno-plt -pipe
LDFLAGS := -Wl,-z,defs,-z,relro,-z,now,-z,nodlopen,-z,text
OBJECTS := chacha.o malloc.o memory.o pages.o random.o util.o
ifeq ($(CONFIG_CXX_ALLOCATOR),true)
LDLIBS += -lstdc++
OBJECTS += new.o
endif
hardened_malloc.so: $(OBJECTS)
$(CC) $(CFLAGS) $(LDFLAGS) -shared $^ $(LDLIBS) -o $@
chacha.o: chacha.c chacha.h
malloc.o: malloc.c malloc.h mutex.h config.h memory.h pages.h random.h util.h
memory.o: memory.c memory.h util.h
new.o: new.cc
pages.o: pages.c pages.h memory.h util.h
random.o: random.c random.h chacha.h util.h
util.o: util.c util.h