cpp/openttd-patchpack/source Changeset - r25047:a8e131d1e25b

Changeset - r25047:a8e131d1e25b

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Michael Lutz - 4 years ago 2021-03-13 20:34:51
michi@icosahedron.de

Fix #8860: [Win32] Crashlog window wasn't reliably shown for crashes not on the main thread.

5 files changed with 42 insertions and 19 deletions:

src/crashlog.h

src/os/macosx/crashlog_osx.cpp

src/os/unix/crashlog_unix.cpp

src/os/windows/crashlog_win.cpp

src/thread.h

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src/crashlog.h

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@@ @@ -114,6 +114,12 @@ public: @@
 	 */
 	static void InitialiseCrashLog();
 	/**
 	 * Prepare crash log handler for a newly started thread.
 	 * @note must be implemented by all implementers of CrashLog.
 	 */
 	static void InitThread();
 	static void SetErrorMessage(const char *message);
 	static void AfterCrashLogCleanup();
 };

src/os/macosx/crashlog_osx.cpp

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@@ @@ -257,3 +257,7 @@ void CDECL HandleCrash(int signum) @@
 		signal(*i, HandleCrash);
+	}
+}
 /* static */ void CrashLog::InitThread()
+{
+}

src/os/unix/crashlog_unix.cpp

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@@ @@ -181,3 +181,7 @@ static void CDECL HandleCrash(int signum @@
 		signal(*i, HandleCrash);
+	}
+}
 /* static */ void CrashLog::InitThread()
+{
+}

src/os/windows/crashlog_win.cpp

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@@ @@ -537,7 +537,7 @@ static void ShowCrashlogWindow(); @@
  * Stack pointer for use when 'starting' the crash handler.
  * Not static as gcc's inline assembly needs it that way.
  */
 void *_safe_esp = nullptr;
+thread_local void *_safe_esp = nullptr;
 static LONG WINAPI ExceptionHandler(EXCEPTION_POINTERS *ep)
+{
@@ @@ -605,6 +605,19 @@ static void CDECL CustomAbort(int signal @@
 /* static */ void CrashLog::InitialiseCrashLog()
+{
 	CrashLog::InitThread();
 	/* SIGABRT is not an unhandled exception, so we need to intercept it. */
 	signal(SIGABRT, CustomAbort);
 #if defined(_MSC_VER)
 	/* Don't show abort message as we will get the crashlog window anyway. */
 	_set_abort_behavior(0, _WRITE_ABORT_MSG);
 #endif
 	SetUnhandledExceptionFilter(ExceptionHandler);
+}
 /* static */ void CrashLog::InitThread()
+{
 #if defined(_M_AMD64) || defined(_M_ARM64)
 	CONTEXT ctx;
 	RtlCaptureContext(&ctx);
@@ @@ -613,28 +626,22 @@ static void CDECL CustomAbort(int signal @@
 	 * function. As we are simulating a function call with the safe ESP value,
 	 * we need to subtract 8 for the imaginary return address otherwise stack
 	 * alignment would be wrong in the called function. */
 #if defined(_M_ARM64)
+#	if defined(_M_ARM64)
 	_safe_esp = (void *)(ctx.Sp - 8);
 #else
+#	else
 	_safe_esp = (void *)(ctx.Rsp - 8);
 #endif
 #else
 #if defined(_MSC_VER)
 	_asm {
 		mov _safe_esp, esp
+	}
 #	endif
 #else
 	asm("movl %esp, __safe_esp");
 #endif
 	void *safe_esp;
 #	if defined(_MSC_VER)
 	_asm {
 		mov safe_esp, esp
+	}
 #	else
 	asm("movl %esp, _safe_esp");
 #	endif
 	_safe_esp = safe_esp;
 #endif
 	/* SIGABRT is not an unhandled exception, so we need to intercept it. */
 	signal(SIGABRT, CustomAbort);
 #if defined(_MSC_VER)
 	/* Don't show abort message as we will get the crashlog window anyway. */
 	_set_abort_behavior(0, _WRITE_ABORT_MSG);
 #endif
 	SetUnhandledExceptionFilter(ExceptionHandler);
+}
 /* The crash log GUI */

src/thread.h

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@@ @@ -11,6 +11,7 @@ @@
 #define THREAD_H
 #include "debug.h"
 #include "crashlog.h"
 #include <system_error>
 #include <thread>
@@ @@ -47,6 +48,7 @@ inline bool StartNewThread(std::thread * @@
 	try {
 		std::thread t([] (const char *name, TFn&& F, TArgs&&... A) {
 				SetCurrentThreadName(name);
 				CrashLog::InitThread();
 				try {
 					/* Call user function with the given arguments. */
 					F(A...);

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