![]() This code sample contains one vulnerability: int G, G1, G2 Once you’ve enabled the warning, just compile your code to see where mitigations would be inserted. You can do this in the text box in Project Properties > C/C++ > Command Line > Additional Options. To do this, put /w35045 on the command line: it says to treat warning number 5045 as level 3. The default level for C++ projects is /W3, so you can set the warning level of C5045 to level 3. ![]() Set the warning level of C5045 to a level specified in the “Warning Level” setting.Even the VC++ libraries don’t attempt to be clean for all warnings ( /Wall). This option enables all warnings so it can be a bit noisy. Set the warning level to EnableAllWarnings in Project Properties > C/C++ > General > Warning Level.Complete details about are available in context in the original MSVC Spectre mitigation post on VCBlog. This change builds upon our existing Spectre mitigation support, including the changes introduced in Preview 3. A new warning, C5045, lets you see what patterns in your code would have caused a mitigation, such as an LFENCE, to be inserted. ![]() Visual Studio 2017 version 15.7 Preview 4 adds a new capability to our Spectre mitigation: the ability to see where the compiler would have inserted a mitigation and what data led to that action.
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