feat: Add Breakpad support for Windows (#278)

CMakeLists.txt

@@ -91,8 +91,8 @@ endif()
 option(SENTRY_ENABLE_INSTALL "Enable sentry installation" "${SENTRY_MAIN_PROJECT}")
 
 if(MSVC AND CMAKE_GENERATOR_TOOLSET MATCHES "_xp$")
-	message(WARNING "Crashpad is not supported for MSVC with XP toolset. Default backend was switched to 'none'")
-	set(SENTRY_DEFAULT_BACKEND "none")
+	message(WARNING "Crashpad is not supported for MSVC with XP toolset. Default backend was switched to 'breakpad'")
+	set(SENTRY_DEFAULT_BACKEND "breakpad")
 elseif(APPLE OR WIN32)
 	set(SENTRY_DEFAULT_BACKEND "crashpad")
 elseif(LINUX)
@@ -119,8 +119,8 @@ endif()
 if(SENTRY_BACKEND_CRASHPAD AND NOT (APPLE OR WIN32))
 	message(FATAL_ERROR "The Crashpad backend is currently only supported on macOS and Windows")
 endif()
-if(SENTRY_BACKEND_BREAKPAD AND NOT LINUX)
-	message(FATAL_ERROR "The Breakpad backend is currently only supported on Linux")
+if(SENTRY_BACKEND_BREAKPAD AND NOT (LINUX OR WIN32))
+	message(FATAL_ERROR "The Breakpad backend is currently only supported on Linux and Windows")
 endif()
 if(SENTRY_BACKEND_INPROC AND WIN32)
 	message(FATAL_ERROR "The in-process backend is not supported on Windows")
@@ -196,6 +196,10 @@ add_subdirectory(src)
 
 set_target_properties(sentry PROPERTIES PUBLIC_HEADER "include/sentry.h")
 
+# check size type
+include(CheckTypeSize)
+check_type_size("long" CMAKE_SIZEOF_LONG)
+
 # https://gitlab.kitware.com/cmake/cmake/issues/18393
 if(BUILD_SHARED_LIBS)
 	if(APPLE)
@@ -211,6 +215,7 @@ if(BUILD_SHARED_LIBS)
 else()
 	target_compile_definitions(sentry PUBLIC SENTRY_BUILD_STATIC)
 endif()
+target_compile_definitions(sentry PRIVATE SIZEOF_LONG=${CMAKE_SIZEOF_LONG})
 
 if(SENTRY_TRANSPORT_CURL)
 	find_package(CURL REQUIRED)
@@ -278,7 +283,10 @@ endif()
 
 #respect CMAKE_SYSTEM_VERSION
 if(WIN32)
-	if(${CMAKE_SYSTEM_VERSION} MATCHES "^10")
+	if(MSVC AND CMAKE_GENERATOR_TOOLSET MATCHES "_xp$")
+		#force WINNT to 5.1 for Windows XP toolchain
+		target_compile_definitions(sentry PRIVATE "_WIN32_WINNT=0x0501")
+	elseif(${CMAKE_SYSTEM_VERSION} MATCHES "^10")
 		target_compile_definitions(sentry PRIVATE "_WIN32_WINNT=0x0A00")
 	elseif(${CMAKE_SYSTEM_VERSION} MATCHES "^6.3")
 		target_compile_definitions(sentry PRIVATE "_WIN32_WINNT=0x0603")

Makefile

@@ -77,5 +77,5 @@ format: setup-venv
 
 style: setup-venv
 	@.venv/bin/python ./scripts/check-clang-format.py -r examples include src tests/unit
-	@.venv/bin/black --check tests
+	@.venv/bin/black --diff --check tests
 .PHONY: style

README.md

@@ -71,7 +71,7 @@ The SDK supports different features on the target platform:
   have the `curl` library available. On other platforms, library users need to
   implement their own transport, based on the `function transport` API.
 - **Crashpad Backend** is currently only supported on Windows and macOS.
-- **Breakpad Backend** is currently only supported on Linux.
+- **Breakpad Backend** is currently only supported on Linux and Windows.
 
 ## Building and Installation
 
@@ -173,7 +173,6 @@ using `cmake -D BUILD_SHARED_LIBS=OFF ..`.
 
   For Windows versions below than `6.0` it is also necessary to use XP toolchain
   in case of MSVC compiler (pass `-T v141_xp` to CMake command line).
-  Also, you are not able to use Crashpad with XP toolchains, no crashes will be handled at all.
 
 - `SENTRY_TRANSPORT` (Default: depending on platform):
   Sentry can use different http libraries to send reports to the server.
@@ -190,7 +189,7 @@ using `cmake -D BUILD_SHARED_LIBS=OFF ..`.
   - **crashpad**: This uses the out-of-process crashpad handler. It is currently
     only supported on Windows and macOS, and used as the default there.
   - **breakpad**: This uses the in-process breakpad handler. It is currently
-    only supported on Linux, and used as the default there.
+    only supported on Linux and Windows, and used as the default on Linux.
   - **inproc**: A small in-process handler which is supported on all platforms
     except Windows, and is used as default on Linux and Android.
   - **none**: This builds `sentry-native` without a backend, so it does not handle
@@ -206,7 +205,7 @@ using `cmake -D BUILD_SHARED_LIBS=OFF ..`.
 | Backends   |         |       |       |         |
 | - inproc   |         | ✓     | ✓     | ☑       |
 | - crashpad | ☑       | ☑     |       |         |
-| - breakpad |         |       | ☑     |         |
+| - breakpad | ✓       |       | ☑     |         |
 | - none     | ✓       | ✓     | ✓     | ✓       |
 
 Legend:

external/CMakeLists.txt

@@ -1,51 +1,93 @@
-if (LINUX OR ANDROID)
-# The list is copied from: https://github.com/google/breakpad/blob/c7522272ffafa9b162f135aaee5d02a8895fcb0b/Makefile.am#L153-L188
-    list(APPEND BREAKPAD_SOURCES
-        breakpad/src/client/linux/crash_generation/crash_generation_client.cc
-        breakpad/src/client/linux/crash_generation/crash_generation_server.cc
-        breakpad/src/client/linux/dump_writer_common/thread_info.cc
-        breakpad/src/client/linux/dump_writer_common/ucontext_reader.cc
-        breakpad/src/client/linux/handler/exception_handler.cc
-        breakpad/src/client/linux/handler/exception_handler.h
-        breakpad/src/client/linux/handler/minidump_descriptor.cc
-        breakpad/src/client/linux/handler/minidump_descriptor.h
-        breakpad/src/client/linux/log/log.cc
-        breakpad/src/client/linux/log/log.h
-        breakpad/src/client/linux/microdump_writer/microdump_writer.cc
-        breakpad/src/client/linux/microdump_writer/microdump_writer.h
-        breakpad/src/client/linux/minidump_writer/linux_core_dumper.cc
-        breakpad/src/client/linux/minidump_writer/linux_dumper.cc
-        breakpad/src/client/linux/minidump_writer/linux_ptrace_dumper.cc
-        breakpad/src/client/linux/minidump_writer/minidump_writer.cc
-        breakpad/src/client/minidump_file_writer-inl.h
-        breakpad/src/client/minidump_file_writer.cc
-        breakpad/src/client/minidump_file_writer.h
-        breakpad/src/common/convert_UTF.cc
-        breakpad/src/common/convert_UTF.h
-        breakpad/src/common/md5.cc
-        breakpad/src/common/md5.h
-        breakpad/src/common/string_conversion.cc
-        breakpad/src/common/string_conversion.h
-        breakpad/src/common/linux/elf_core_dump.cc
-        breakpad/src/common/linux/elfutils.cc
-        breakpad/src/common/linux/elfutils.h
-        breakpad/src/common/linux/file_id.cc
-        breakpad/src/common/linux/file_id.h
-        breakpad/src/common/linux/guid_creator.cc
-        breakpad/src/common/linux/guid_creator.h
-        breakpad/src/common/linux/linux_libc_support.cc
-        breakpad/src/common/linux/memory_mapped_file.cc
-        breakpad/src/common/linux/safe_readlink.cc
-    )
+# The list of files is drived from: breakpad/Makefile.am
+
+set(BREAKPAD_SOURCES_COMMON
+    breakpad/src/common/convert_UTF.cc
+    breakpad/src/common/convert_UTF.h 
+    breakpad/src/common/md5.cc 
+    breakpad/src/common/md5.h 
+    breakpad/src/common/string_conversion.cc 
+    breakpad/src/common/string_conversion.h 
+)
+
+set(BREAKPAD_SOURCES_COMMON_LINUX
+    breakpad/src/common/linux/elf_core_dump.cc 
+    breakpad/src/common/linux/elfutils.cc 
+    breakpad/src/common/linux/elfutils.h 
+    breakpad/src/common/linux/file_id.cc 
+    breakpad/src/common/linux/file_id.h 
+    breakpad/src/common/linux/guid_creator.cc 
+    breakpad/src/common/linux/guid_creator.h 
+    breakpad/src/common/linux/linux_libc_support.cc 
+    breakpad/src/common/linux/memory_mapped_file.cc 
+    breakpad/src/common/linux/safe_readlink.cc
+)
+
+set(BREAKPAD_SOURCES_COMMON_LINUX_GETCONTEXT
+    breakpad/src/common/linux/breakpad_getcontext.S
+)
+
+set(BREAKPAD_SOURCES_COMMON_WINDOWS
+    breakpad/src/common/windows/guid_string.cc
+    breakpad/src/common/windows/guid_string.h
+)
+
+set(BREAKPAD_SOURCES_CLIENT_LINUX
+    breakpad/src/client/minidump_file_writer-inl.h 
+    breakpad/src/client/minidump_file_writer.cc 
+    breakpad/src/client/minidump_file_writer.h 
+    breakpad/src/client/linux/crash_generation/crash_generation_client.cc 
+    breakpad/src/client/linux/crash_generation/crash_generation_server.cc 
+    breakpad/src/client/linux/dump_writer_common/thread_info.cc 
+    breakpad/src/client/linux/dump_writer_common/ucontext_reader.cc 
+    breakpad/src/client/linux/handler/exception_handler.cc 
+    breakpad/src/client/linux/handler/exception_handler.h 
+    breakpad/src/client/linux/handler/minidump_descriptor.cc 
+    breakpad/src/client/linux/handler/minidump_descriptor.h 
+    breakpad/src/client/linux/log/log.cc 
+    breakpad/src/client/linux/log/log.h 
+    breakpad/src/client/linux/microdump_writer/microdump_writer.cc 
+    breakpad/src/client/linux/microdump_writer/microdump_writer.h 
+    breakpad/src/client/linux/minidump_writer/linux_core_dumper.cc 
+    breakpad/src/client/linux/minidump_writer/linux_dumper.cc 
+    breakpad/src/client/linux/minidump_writer/linux_ptrace_dumper.cc 
+    breakpad/src/client/linux/minidump_writer/minidump_writer.cc 
+)
+
+set(BREAKPAD_SOURCES_CLIENT_WINDOWS
+    breakpad/src/client/windows/crash_generation/crash_generation_client.cc
+    breakpad/src/client/windows/crash_generation/crash_generation_client.h
+    breakpad/src/client/windows/handler/exception_handler.cc
+    breakpad/src/client/windows/handler/exception_handler.h
+)
+
+
+add_library(breakpad_client STATIC)
+target_sources(breakpad_client PRIVATE ${BREAKPAD_SOURCES_COMMON})
+
+if(LINUX OR ANDROID)
+    target_sources(breakpad_client PRIVATE ${BREAKPAD_SOURCES_COMMON_LINUX} ${BREAKPAD_SOURCES_CLIENT_LINUX})
+
+    include(CheckFunctionExists)
+    check_function_exists(getcontext HAVE_GETCONTEXT)
+    if(HAVE_GETCONTEXT)
+        target_compile_definitions(breakpad_client PRIVATE HAVE_GETCONTEXT)
+    else()
+        target_sources(breakpad_client PRIVATE ${BREAKPAD_SOURCES_COMMON_LINUX_GETCONTEXT})
+    endif()
+
+	set_property(TARGET breakpad_client PROPERTY POSITION_INDEPENDENT_CODE ON)
 endif()
-if (ANDROID)
-    list(APPEND BREAKPAD_SOURCES
-        breakpad/src/common/android/breakpad_getcontext.S
-    )
+
+if(WIN32)
+    target_sources(breakpad_client PRIVATE ${BREAKPAD_SOURCES_COMMON_WINDOWS} ${BREAKPAD_SOURCES_CLIENT_WINDOWS})
+    target_compile_definitions(breakpad_client PRIVATE _UNICODE)
+
+    # set static runtime if enabled
+    if(SENTRY_BUILD_RUNTIMESTATIC AND MSVC)
+        set_property(TARGET breakpad_client PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+    endif()
 endif()
 
-add_library(breakpad_client STATIC ${BREAKPAD_SOURCES})
-set_property(TARGET breakpad_client PROPERTY POSITION_INDEPENDENT_CODE ON)
 # breakpad has includes directly to `third_party/lss/...`,
 # which are being resolved correctly when we add the current directory to
 # the include directories. A giant hack, yes, but it works