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56 lines
1.5 KiB
Markdown
56 lines
1.5 KiB
Markdown
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# Getting Started
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## create native project and update CMakeLists.txt
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```
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if(NOT TARGET dobby)
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set(DOBBY_DIR /Users/jmpews/Workspace/Project.wrk/Dobby)
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macro(SET_OPTION option value)
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set(${option} ${value} CACHE INTERNAL "" FORCE)
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endmacro()
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SET_OPTION(DOBBY_DEBUG OFF)
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SET_OPTION(DOBBY_GENERATE_SHARED OFF)
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add_subdirectory(${DOBBY_DIR} dobby)
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get_property(DOBBY_INCLUDE_DIRECTORIES
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TARGET dobby
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PROPERTY INCLUDE_DIRECTORIES)
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include_directories(
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.
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${DOBBY_INCLUDE_DIRECTORIES}
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$<TARGET_PROPERTY:dobby,INCLUDE_DIRECTORIES>
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)
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endif()
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add_library(native-lib SHARED
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${DOBBY_DIR}/example/android_common_api.cc
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native-lib.cpp)
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```
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## replace hook function
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ref source `builtin-plugin/ApplicationEventMonitor/dynamic_loader_monitor.cc`
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ref source `builtin-plugin/ApplicationEventMonitor/posix_file_descriptor_operation_monitor.cc`
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## instrument function
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ref source `builtin-plugin/ApplicationEventMonitor/memory_operation_instrument.cc`
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## Android Linker Restriction
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ref source `builtin-plugin/AndroidRestriction/android_restriction_demo.cc`
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```c
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# impl at SymbolResolver/elf/dobby_symbol_resolver.cc
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void *__loader_dlopen = DobbySymbolResolver(NULL, "__loader_dlopen");
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DobbyHook((void *)__loader_dlopen, (void *)fake_loader_dlopen, (void **)&orig_loader_dlopen);
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```
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```
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# impl at AndroidRestriction/android_restriction.cc
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linker_disable_namespace_restriction();
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void *handle = NULL;
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handle = dlopen(lib, RTLD_LAZY);
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vm = dlsym(handle, "_ZN7android14AndroidRuntime7mJavaVME");
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```
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