Crash log: Write out crash log incrementally on Windows, MacOS

src/crashlog.cpp

@@ -796,12 +796,23 @@ void CrashLog::FlushCrashLogBuffer()
 		fwrite(this->crash_buffer_write, 1, len, this->crash_file);
 		fflush(this->crash_file);
 	}
+#if !defined(_WIN32)
 	fwrite(this->crash_buffer_write, 1, len, stdout);
 	fflush(stdout);
+#endif
 
 	this->crash_buffer_write += len;
 }
 
+void CrashLog::CloseCrashLogFile()
+{
+	this->FlushCrashLogBuffer();
+	if (this->crash_file != nullptr) {
+		FioFCloseFile(this->crash_file);
+		this->crash_file = nullptr;
+	}
+}
+
 /* virtual */ int CrashLog::WriteCrashDump(char *filename, const char *filename_last) const
 {
 	/* Stub implementation; not all OSes support this. */
@@ -954,11 +965,7 @@ bool CrashLog::MakeCrashLog(char *buffer, const char *last)
 	this->crash_buffer_write = buffer;
 
 	this->FillCrashLog(buffer, last);
-	this->FlushCrashLogBuffer();
-	if (this->crash_file != nullptr) {
-		FioFCloseFile(this->crash_file);
-		this->crash_file = nullptr;
-	}
+	this->CloseCrashLogFile();
 	printf("Crash log generated.\n\n");
 
 

src/crashlog.h

@@ -162,6 +162,7 @@ public:
 
 	char *FillCrashLog(char *buffer, const char *last);
 	void FlushCrashLogBuffer();
+	void CloseCrashLogFile();
 	char *FillDesyncCrashLog(char *buffer, const char *last, const DesyncExtraInfo &info) const;
 	char *FillInconsistencyLog(char *buffer, const char *last, const InconsistencyExtraInfo &info) const;
 	char *FillVersionInfoLog(char *buffer, const char *last) const;

src/os/macosx/crashlog_osx.cpp

@@ -17,6 +17,7 @@
 #include "../../debug.h"
 #include "../../video/video_driver.hpp"
 #include "../../scope.h"
+#include "../../walltime_func.h"
 #include "macos.h"
 
 #include <errno.h>
@@ -415,27 +416,35 @@ public:
 		bool ret = true;
 
 		printf("Crash encountered, generating crash log...\n");
-		this->FillCrashLog(buffer, last);
-		printf("%s\n", buffer);
-		printf("Crash log generated.\n\n");
+
+		char *name_buffer_date = this->name_buffer + seprintf(this->name_buffer, lastof(this->name_buffer), "crash-");
+		UTCTime::Format(name_buffer_date, lastof(this->name_buffer), "%Y%m%dT%H%M%SZ");
 
 		printf("Writing crash log to disk...\n");
-		if (!this->WriteCrashLog(buffer, filename_log, lastof(filename_log))) {
-			filename_log[0] = '\0';
+		bool bret = this->WriteCrashLog("", this->filename_log, lastof(this->filename_log), this->name_buffer, &(this->crash_file));
+		if (bret) {
+			printf("Crash log written to %s. Please add this file to any bug reports.\n\n", this->filename_log);
+		} else {
+			printf("Writing crash log failed. Please attach the output above to any bug reports.\n\n");
 			ret = false;
 		}
+		this->crash_buffer_write = buffer;
+
+		this->FillCrashLog(buffer, last);
+		this->CloseCrashLogFile();
+		printf("Crash log generated.\n\n");
 
 		printf("Writing crash savegame...\n");
 		_savegame_DBGL_data = buffer;
 		_save_DBGC_data = true;
-		if (!this->WriteSavegame(filename_save, lastof(filename_save))) {
+		if (!this->WriteSavegame(filename_save, lastof(filename_save), this->name_buffer)) {
 			filename_save[0] = '\0';
 			ret = false;
 		}
 
 		printf("Writing crash screenshot...\n");
 		SetScreenshotAuxiliaryText("Crash Log", buffer);
-		if (!this->WriteScreenshot(filename_screenshot, lastof(filename_screenshot))) {
+		if (!this->WriteScreenshot(filename_screenshot, lastof(filename_screenshot), this->name_buffer)) {
 			filename_screenshot[0] = '\0';
 			ret = false;
 		}

src/os/windows/crashlog_win.cpp

@@ -63,8 +63,7 @@ public:
 #endif /* _MSC_VER */
 #if defined(_MSC_VER) || defined(WITH_DBGHELP)
 	char *AppendDecodedStacktrace(char *buffer, const char *last) const;
-#else
-	char *AppendDecodedStacktrace(char *buffer, const char *last) const { return buffer; }
+	char *LogDebugExtra(char *buffer, const char *last) const override;
 #endif /* _MSC_VER || WITH_DBGHELP */
 
 
@@ -159,6 +158,7 @@ static const char *GetAccessViolationTypeString(uint type)
 			}
 		}
 	}
+	this->CrashLogFaultSectionCheckpoint(buffer);
 	buffer += seprintf(buffer, last, " Message:    %s\n\n",
 			message == nullptr ? "<none>" : message);
 
@@ -391,6 +391,8 @@ static char *PrintModuleInfo(char *output, const char *last, HMODULE mod)
 	);
 #endif
 
+	this->CrashLogFaultSectionCheckpoint(buffer);
+
 	buffer += seprintf(buffer, last, "\n Bytes at instruction pointer:\n");
 #ifdef _M_AMD64
 	byte *b = (byte*)ep->ContextRecord->Rip;
@@ -475,7 +477,7 @@ char *CrashLogWindows::AppendDecodedStacktrace(char *buffer, const char *last) c
 		BOOL (WINAPI * pSymGetLineFromAddr64)(HANDLE, DWORD64, PDWORD, PIMAGEHLP_LINE64);
 	} proc;
 
-	buffer += seprintf(buffer, last, "\nDecoded stack trace:\n");
+	buffer += seprintf(buffer, last, "Decoded stack trace:\n");
 
 	/* Try to load the functions from the DLL, if that fails because of a too old dbghelp.dll, just skip it. */
 	if (LoadLibraryList((Function*)&proc, dbg_import)) {
@@ -619,8 +621,16 @@ char *CrashLogWindows::AppendDecodedStacktrace(char *buffer, const char *last) c
 		proc.pSymCleanup(hCur);
 	}
 
-	return buffer + seprintf(buffer, last, "\n*** End of additional info ***\n");
+	return buffer + seprintf(buffer, last, "\n");;
 }
+
+	/**
+	 * Log decoded stack trace
+	 */
+	char *CrashLogWindows::LogDebugExtra(char *buffer, const char *last) const
+	{
+		return this->AppendDecodedStacktrace(buffer, last);
+	}
 #endif /* _MSC_VER  || WITH_DBGHELP */
 
 #if defined(_MSC_VER)
@@ -703,12 +713,15 @@ static LONG WINAPI ExceptionHandler(EXCEPTION_POINTERS *ep)
 
 	CrashLogWindows *log = new CrashLogWindows(ep);
 	CrashLogWindows::current = log;
-	char *buf = log->FillCrashLog(log->crashlog, lastof(log->crashlog));
 	char *name_buffer_date = log->name_buffer + seprintf(log->name_buffer, lastof(log->name_buffer), "crash-");
 	UTCTime::Format(name_buffer_date, lastof(log->name_buffer), "%Y%m%dT%H%M%SZ");
+
+	log->WriteCrashLog("", log->crashlog_filename, lastof(log->crashlog_filename), log->name_buffer, &(log->crash_file));
+	log->crash_buffer_write = log->crashlog;
+	log->FillCrashLog(log->crashlog, lastof(log->crashlog));
+	log->CloseCrashLogFile();
+
 	log->WriteCrashDump(log->crashdump_filename, lastof(log->crashdump_filename));
-	log->AppendDecodedStacktrace(buf, lastof(log->crashlog));
-	log->WriteCrashLog(log->crashlog, log->crashlog_filename, lastof(log->crashlog_filename), log->name_buffer);
 	SetScreenshotAuxiliaryText("Crash Log", log->crashlog);
 	log->WriteScreenshot(log->screenshot_filename, lastof(log->screenshot_filename), log->name_buffer);