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Principle

• How to get the original function address (addr_pri.h, addr_any.h)
• How to replace the original function with stub function (stub.h)

Supported

• Supported operating systems:
  • Windows
  • Linux
  • MacOS(x86-64, printf '\x07' | dd of=test_function bs=1 seek=160 count=1 conv=notrunc)
• Supported hardware platform:
  • x86
  • x86-64
  • arm32
  • arm64
  • arm thumb
  • riscv32
  • riscv64
  • loongarch64
  • mips64
  • ppc64
  • alpha
  • sparc
  • sw_64
• Supported compiler:
  • msvc
  • gcc
  • clang
• Support function type:
  • normal function
  • variadic function
  • template function
  • overload function
  • lambda
  • static function(use addr_any.h)
  • inline function(use compiler options)
  • constructor function
  • destructor function
  • member function
  • static member function
  • virtual function(not pure)
  • virtual and overload function
  • functor
  • private member function(use addr_pri.h)
  • private member function(cpp17)

Description of the unit test

Cannot stub

• Can't stub the exit function, the compiler has made special optimizations.
• Can't stub pure virtual functions, pure virtual functions not have the address.
• Can't stub lambda functions, lambda functions not get the address.(You can try to use addr_any.h api.)
• Can't stub static functions, static function address is not visible.(You can try to use addr_any.h api.)

Unit test compilation option for linux g++

• -fno-access-control
• -fno-inline
• -Wno-pmf-conversions
• -Wl,--allow-multiple-definition
• -no-pie -fno-stack-protector
• -fprofile-arcs
• -ftest-coverage

Code coverage statistics for linux g++

lcov -d build/ -z
lcov -d build/ -b ../../src1 --no-external -rc lcov_branch_coverage=1 -t ut -c -o ut_1.info
lcov -d build/ -b ../../src2 --no-external -rc lcov_branch_coverage=1 -t ut -c -o ut_2.info
lcov -a ut_1.info -a ut_2.info -o ut.info
genhtml -o report/ --prefix=`pwd` --branch-coverage --function-coverage ut.info

Code coverage statistics for windows

OpenCppCoverage

OpenCppCoverage.exe --sources MySourcePath* -- YourProgram.exe arg1 arg2

Interface description

stub.h

Stub stub
stub.set(addr, addr_stub)
stub.reset(addr)

addr_pri.h

Declaration:
    ACCESS_PRIVATE_FIELD(ClassName, TypeName, FieldName)
    ACCESS_PRIVATE_FUN(ClassName, TypeName, FunName)
    ACCESS_PRIVATE_STATIC_FIELD(ClassName, TypeName, FieldName)
    ACCESS_PRIVATE_STATIC_FUN(ClassName, TypeName, FunName)

Use:
    access_private_field::ClassNameFieldName(object);
    access_private_static_field::ClassName::ClassNameFieldName();
    call_private_fun::ClassNameFunName(object,parameters...);
    call_private_static_fun::ClassName::ClassNameFunName(parameters...);
    get_private_fun::ClassNameFunName();
    get_private_static_fun::ClassName::ClassNameFunName();

addr_any.h(linux)

AddrAny any //for exe
AddrAny any(libname) //for lib

int get_local_func_addr_symtab(std::string func_name_regex_str, std::map<std::string,void*>& result)
int get_global_func_addr_symtab(std::string func_name_regex_str, std::map<std::string,void*>& result)
int get_weak_func_addr_symtab(std::string func_name_regex_str, std::map<std::string,void*>& result)

int get_global_func_addr_dynsym( std::string func_name_regex_str, std::map<std::string,void*>& result)
int get_weak_func_addr_dynsym(std::string func_name_regex_str, std::map<std::string,void*>& result)

addr_any.h(windows)

AddrAny any //for all
int get_func_addr(std::string func_name, std::map<std::string,void*>& result)

addr_any.h(darwin)

not implement