SL-821: Use classic-C BugSplat callback and static dumb pointer.

BugSplat has no business introducing a new C++ API based on classic-C function
pointers without even a generic pass-through user data pointer!

indra/newview/llappviewerwin32.cpp

@@ -74,14 +74,43 @@
 #ifdef LL_BUGSPLAT
 #include "BugSplat.h"
 
-// FIXME: need a production BugSplat database name
-static const wchar_t *bugdb_name = L"second_life_callum_test";
-
-// MiniDmpSender's constructor is defined to accept __wchar_t* instead of
-// plain wchar_t*.
-inline std::basic_string<__wchar_t> wunder(const std::wstring& str)
+namespace
 {
-    return { str.begin(), str.end() };
+    // FIXME: need a production BugSplat database name
+    static const wchar_t *bugdb_name = L"second_life_callum_test";
+
+    // MiniDmpSender's constructor is defined to accept __wchar_t* instead of
+    // plain wchar_t*.
+    inline std::basic_string<__wchar_t> wunder(const std::wstring& str)
+    {
+        return { str.begin(), str.end() };
+    }
+
+    // Irritatingly, MiniDmpSender::setCallback() is defined to accept a
+    // classic-C function pointer instead of an arbitrary C++ callable. In the
+    // latter case, we could pass a lambda that binds our MiniDmpSender
+    // pointer. As things stand, we must define an actual function and store
+    // the pointer statically.
+    static MiniDmpSender *sBugSplatSender = nullptr;
+
+    bool bugsplatSendLog(UINT nCode, LPVOID lpVal1, LPVOID lpVal2)
+    {
+        // If we haven't yet initialized LLDir, don't bother trying to
+        // find our log file.
+        // Alternatively -- if we might encounter trouble trying to query
+        // LLDir during crash cleanup -- consider making gDirUtilp an
+        // LLPounceable, and attach a callback that stores the pathname to
+        // the log file here.
+        if (nCode == MDSCB_EXCEPTIONCODE && gDirUtilp)
+        {
+            // send the main viewer log file
+            // widen to wstring, convert to __wchar_t, then pass c_str()
+            sBugSplatSender->sendAdditionalFile(
+                wunder(wstringize(gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "SecondLife.log"))).c_str());
+        }
+
+        return false;
+    }
 }
 #endif // LL_BUGSPLAT
 
@@ -526,30 +555,12 @@ bool LLAppViewerWin32::init()
 										   LL_VIEWER_VERSION_BUILD));
 
 	// have to convert normal wide strings to strings of __wchar_t
-	auto sender = new MiniDmpSender(
+	sBugSplatSender = new MiniDmpSender(
 		wunder(bugdb_name).c_str(),
 		wunder(LL_TO_WSTRING(LL_VIEWER_CHANNEL)).c_str(),
 		wunder(version_string).c_str(),
 		nullptr);
-	sender->setCallback(
-		[sender](unsigned int nCode, void* lpVal1, void* lpVal2)
-		{
-			// If we haven't yet initialized LLDir, don't bother trying to
-			// find our log file.
-			// Alternatively -- if we might encounter trouble trying to query
-			// LLDir during crash cleanup -- consider making gDirUtilp an
-			// LLPounceable, and attach a callback that stores the pathname to
-			// the log file here.
-			if (nCode == MDSCB_EXCEPTIONCODE && gDirUtilp)
-			{
-				// send the main viewer log file
-				// widen to wstring, convert to __wchar_t, then pass c_str()
-				sender->sendAdditionalFile(
-					wunder(wstringize(gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "SecondLife.log"))).c_str());
-			}
-
-			return false;
-		});
+	sBugSplatSender->setCallback(bugsplatSendLog);
 
 	// engage stringize() overload that converts from wstring
 	LL_INFOS() << "Engaged BugSplat(" << LL_TO_STRING(LL_VIEWER_CHANNEL)