# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Downloads and unpacks libunwind at configure time

set(workdir "${CMAKE_BINARY_DIR}/libunwind-download")

configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
               "${workdir}/CMakeLists.txt")
execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
                RESULT_VARIABLE error
                WORKING_DIRECTORY "${workdir}")
if(error)
  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
endif()

execute_process(COMMAND ${CMAKE_COMMAND} --build .
                RESULT_VARIABLE error
                WORKING_DIRECTORY "${workdir}")
if(error)
  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
endif()

set(_unwind_src "${CMAKE_BINARY_DIR}/libunwind-src")
foreach(wrapped _wrapped "")
  add_library(unwind_ptrace${wrapped} STATIC
    # internal_headers
    ${_unwind_src}/include/compiler.h
    ${_unwind_src}/include/config.h
    ${_unwind_src}/include/dwarf.h
    ${_unwind_src}/include/dwarf-eh.h
    ${_unwind_src}/include/dwarf_i.h
    ${_unwind_src}/include/libunwind.h
    ${_unwind_src}/include/libunwind-common.h
    ${_unwind_src}/include/libunwind-coredump.h
    ${_unwind_src}/include/libunwind-dynamic.h
    ${_unwind_src}/include/libunwind-ptrace.h
    ${_unwind_src}/include/libunwind-x86_64.h
    ${_unwind_src}/include/libunwind_i.h
    ${_unwind_src}/include/mempool.h
    ${_unwind_src}/include/remote.h
    ${_unwind_src}/include/tdep-x86_64/dwarf-config.h
    ${_unwind_src}/include/tdep-x86_64/libunwind_i.h
    ${_unwind_src}/include/tdep/dwarf-config.h
    ${_unwind_src}/include/tdep/libunwind_i.h
    ${_unwind_src}/include/unwind.h
    ${_unwind_src}/src/elf32.h
    ${_unwind_src}/src/elf64.h
    ${_unwind_src}/src/elfxx.h
    ${_unwind_src}/src/os-linux.h
    ${_unwind_src}/src/x86_64/init.h
    ${_unwind_src}/src/x86_64/offsets.h
    ${_unwind_src}/src/x86_64/ucontext_i.h
    ${_unwind_src}/src/x86_64/unwind_i.h
    # included_sources
    ${_unwind_src}/src/elf64.h
    ${_unwind_src}/src/elfxx.h
    ${_unwind_src}/src/elfxx.c
    # sources_common
    ${_unwind_src}/src/dwarf/Gexpr.c
    ${_unwind_src}/src/dwarf/Gfde.c
    ${_unwind_src}/src/dwarf/Gfind_proc_info-lsb.c
    ${_unwind_src}/src/dwarf/Gfind_unwind_table.c
    ${_unwind_src}/src/dwarf/Gparser.c
    ${_unwind_src}/src/dwarf/Gpe.c
    ${_unwind_src}/src/dwarf/Gstep.c
    ${_unwind_src}/src/dwarf/global.c
    ${_unwind_src}/src/mi/Gdestroy_addr_space.c
    ${_unwind_src}/src/mi/Gdyn-extract.c
    ${_unwind_src}/src/mi/Gfind_dynamic_proc_info.c
    ${_unwind_src}/src/mi/Gget_accessors.c
    ${_unwind_src}/src/mi/Gget_proc_name.c
    ${_unwind_src}/src/mi/Gget_reg.c
    ${_unwind_src}/src/mi/Gput_dynamic_unwind_info.c
    ${_unwind_src}/src/mi/flush_cache.c
    ${_unwind_src}/src/mi/init.c
    ${_unwind_src}/src/mi/mempool.c
    ${_unwind_src}/src/os-linux.c
    ${_unwind_src}/src/x86_64/Gcreate_addr_space.c
    ${_unwind_src}/src/x86_64/Gglobal.c
    ${_unwind_src}/src/x86_64/Ginit.c
    ${_unwind_src}/src/x86_64/Gos-linux.c
    ${_unwind_src}/src/x86_64/Gregs.c
    ${_unwind_src}/src/x86_64/Gresume.c
    ${_unwind_src}/src/x86_64/Gstash_frame.c
    ${_unwind_src}/src/x86_64/Gstep.c
    ${_unwind_src}/src/x86_64/is_fpreg.c
    ${_unwind_src}/src/x86_64/setcontext.S
    # srcs
    ${_unwind_src}/src/mi/Gdyn-remote.c
    ${_unwind_src}/src/ptrace/_UPT_access_fpreg.c
    ${_unwind_src}/src/ptrace/_UPT_access_mem.c
    ${_unwind_src}/src/ptrace/_UPT_access_reg.c
    ${_unwind_src}/src/ptrace/_UPT_accessors.c
    ${_unwind_src}/src/ptrace/_UPT_create.c
    ${_unwind_src}/src/ptrace/_UPT_destroy.c
    ${_unwind_src}/src/ptrace/_UPT_elf.c
    ${_unwind_src}/src/ptrace/_UPT_find_proc_info.c
    ${_unwind_src}/src/ptrace/_UPT_get_dyn_info_list_addr.c
    ${_unwind_src}/src/ptrace/_UPT_get_proc_name.c
    ${_unwind_src}/src/ptrace/_UPT_internal.h
    ${_unwind_src}/src/ptrace/_UPT_put_unwind_info.c
    ${_unwind_src}/src/ptrace/_UPT_reg_offset.c
    ${_unwind_src}/src/ptrace/_UPT_resume.c
    # hdrs
    ${_unwind_src}/include/config.h
    ${_unwind_src}/include/libunwind.h
    # source_ptrace
    ${_unwind_src}/src/x86_64/Ginit_remote.c
  )
  add_library(unwind::unwind_ptrace${wrapped} ALIAS unwind_ptrace${wrapped})
  target_include_directories(unwind_ptrace${wrapped} PUBLIC
    ${_unwind_src}/include
    ${_unwind_src}/include/tdep
    ${_unwind_src}/src
  )
  target_compile_options(unwind_ptrace${wrapped} PRIVATE
    -fno-common
    -Wno-cpp
  )
  target_compile_definitions(unwind_ptrace${wrapped} PRIVATE
    -DHAVE_CONFIG_H
    -D_GNU_SOURCE
    -DNO_FRAME_POINTER
  )
  target_link_libraries(unwind_ptrace${wrapped} PRIVATE
    sapi::base
    sandbox2::ptrace_hook
  )
endforeach()
target_compile_definitions(unwind_ptrace_wrapped PUBLIC
  -D_UPT_accessors=_UPT_accessors_wrapped
  -D_UPT_create=_UPT_create_wrapped
  -D_UPT_destroy=_UPT_destroy_wrapped
  -D_Ux86_64_create_addr_space=_Ux86_64_create_addr_space_wrapped
  -D_Ux86_64_destroy_addr_space=_Ux86_64_destroy_addr_space_wrapped
  -D_Ux86_64_get_proc_name=_Ux86_64_get_proc_name_wrapped
  -D_Ux86_64_get_reg=_Ux86_64_get_reg_wrapped
  -D_Ux86_64_init_remote=_Ux86_64_init_remote_wrapped
  -D_Ux86_64_step=_Ux86_64_step_wrapped
  -Dptrace=ptrace_wrapped
)