Add: use breakpad to create crash.dmp on MacOS / Linux too (#11202)

Normally only the Windows platform could create a crash.dmp, making
analysing crash-reports from MacOS / Linux rather tricky.

src/os/macosx/crashlog_osx.cpp

@@ -9,6 +9,7 @@
 
 #include "../../stdafx.h"
 #include "../../crashlog.h"
+#include "../../fileio_func.h"
 #include "../../string_func.h"
 #include "../../gamelog.h"
 #include "../../saveload/saveload.h"
@@ -20,6 +21,10 @@
 #include <dlfcn.h>
 #include <cxxabi.h>
 
+#ifdef WITH_UNOFFICIAL_BREAKPAD
+#	include <client/mac/handler/exception_handler.h>
+#endif
+
 #include "../../safeguards.h"
 
 
@@ -139,6 +144,22 @@ class CrashLogOSX : public CrashLog {
 		fmt::format_to(output_iterator, "\n");
 	}
 
+#ifdef WITH_UNOFFICIAL_BREAKPAD
+	static bool MinidumpCallback(const char* dump_dir, const char* minidump_id, void* context, bool succeeded)
+	{
+		CrashLogOSX *crashlog = reinterpret_cast<CrashLogOSX *>(context);
+
+		crashlog->crashdump_filename = crashlog->CreateFileName(".dmp");
+		std::rename(fmt::format("{}/{}.dmp", dump_dir, minidump_id).c_str(), crashlog->crashdump_filename.c_str());
+		return succeeded;
+	}
+
+	int WriteCrashDump() override
+	{
+		return google_breakpad::ExceptionHandler::WriteMinidump(_personal_dir, MinidumpCallback, this) ? 1 : -1;
+	}
+#endif
+
 public:
 	/**
 	 * A crash log is always generated by signal.
@@ -155,8 +176,8 @@ public:
 		std::string message = fmt::format(
 				 "Please send the generated crash information and the last (auto)save to the developers. "
 				 "This will greatly help debugging. The correct place to do this is https://github.com/OpenTTD/OpenTTD/issues.\n\n"
-				 "Generated file(s):\n{}\n{}\n{}",
-				 this->crashlog_filename, this->savegame_filename, this->screenshot_filename);
+				 "Generated file(s):\n{}\n{}\n{}\n{}",
+				 this->crashlog_filename, this->crashdump_filename, this->savegame_filename, this->screenshot_filename);
 
 		ShowMacDialog(crash_title, message.c_str(), "Quit");
 	}