#3591 Reprot SEH directly to bugsplat

Rethrowing SEH via std::exception results ina callstack that ends at
rethrow.

indra/llcommon/llapp.h

@@ -282,7 +282,7 @@ public:
     LLRunner& getRunner() { return mRunner; }
 
 #ifdef LL_WINDOWS
-    virtual void reportCrashToBugsplat(void* pExcepInfo /*EXCEPTION_POINTERS*/) { }
+    virtual bool reportCrashToBugsplat(void* pExcepInfo /*EXCEPTION_POINTERS*/) { return false; }
 #endif
 
 public:

indra/llcommon/llcoros.cpp

@@ -310,18 +310,20 @@ namespace
 
 static const U32 STATUS_MSC_EXCEPTION = 0xE06D7363; // compiler specific
 
-U32 exception_filter(U32 code, struct _EXCEPTION_POINTERS *exception_infop)
+U32 exception_filter(U32 code, struct _EXCEPTION_POINTERS* exception_infop)
 {
     if (code == STATUS_MSC_EXCEPTION)
     {
         // C++ exception, go on
         return EXCEPTION_CONTINUE_SEARCH;
     }
-    else
+    else if (!LLApp::instance()->reportCrashToBugsplat((void*)exception_infop))
     {
         // handle it
         return EXCEPTION_EXECUTE_HANDLER;
     }
+
+    return EXCEPTION_CONTINUE_SEARCH;
 }
 
 void sehandle(const LLCoros::callable_t& callable)

indra/newview/llappviewerwin32.cpp

@@ -804,14 +804,16 @@ bool LLAppViewerWin32::cleanup()
     return result;
 }
 
-void LLAppViewerWin32::reportCrashToBugsplat(void* pExcepInfo)
+bool LLAppViewerWin32::reportCrashToBugsplat(void* pExcepInfo)
 {
 #if defined(LL_BUGSPLAT)
     if (sBugSplatSender)
     {
         sBugSplatSender->createReport((EXCEPTION_POINTERS*)pExcepInfo);
+        return true;
     }
 #endif // LL_BUGSPLAT
+    return false;
 }
 
 void LLAppViewerWin32::initLoggingAndGetLastDuration()

indra/newview/llappviewerwin32.h

@@ -43,7 +43,7 @@ public:
     bool init() override; // Override to do application initialization
     bool cleanup() override;
 
-    void reportCrashToBugsplat(void* pExcepInfo) override;
+    bool reportCrashToBugsplat(void* pExcepInfo) override;
 
 protected:
     void initLoggingAndGetLastDuration() override; // Override to clean stack_trace info.