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<p class="MsoPlainText">> You might try compiling with '-fsanitize=undefined -fno-sanitize-<o:p></o:p></p>
<p class="MsoPlainText">> Ubsan doesn't provide an option of using callbacks to implement its<o:p></o:p></p>
<p class="MsoPlainText">> instrumentation. If the no-recovery mode won't work for you, it's pretty<o:p></o:p></p>
<p class="MsoPlainText">> simply to write a custom ubsan runtime that fits in a single object file. That's<o:p></o:p></p>
<p class="MsoPlainText">> what I ended up doing to sanitize our kernel (xnu), so I can offer help if you<o:p></o:p></p>
<p class="MsoPlainText">> decide to go down that path.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Vedant,<o:p></o:p></p>
<p class="MsoPlainText">Thank you. I'm OK to write customized runtime libs for Ubsan. In fact, I did in this way when I enable the Asan in my firmware. My problem is how to correctly implement the UBsan C++ runtime lib with pure C functions in my firmware.
You know, the UBsan define the runtime interface in C++, which is different from the Asan extern "C" ones. Many UBsan RT lib input parameters type are mixed with C++ Class. I'm not sure how to correctly parse the C++ class with C structure. E.g. Many UBsan
RT functions use the Class SourceLocation to pass the source location info. How should I parse or map the class SourceLocation layout to a C structure?
<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">llvm\projects\compiler-rt\lib\ubsan\ubsan_value.h<o:p></o:p></p>
<p class="MsoPlainText">class <span style="color:red">SourceLocation </span>{<o:p></o:p></p>
<p class="MsoPlainText"> const char *Filename;<o:p></o:p></p>
<p class="MsoPlainText"> u32 Line;<o:p></o:p></p>
<p class="MsoPlainText"> u32 Column;<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">public:<o:p></o:p></p>
<p class="MsoPlainText"> SourceLocation() : Filename(), Line(), Column() {}<o:p></o:p></p>
<p class="MsoPlainText"> SourceLocation(const char *Filename, unsigned Line, unsigned Column)<o:p></o:p></p>
<p class="MsoPlainText"> : Filename(Filename), Lin<o:p></o:p></p>
<p class="MsoPlainText">.... .... <o:p></o:p></p>
<p class="MsoPlainText">}<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I’d like to take a look at your XNU Ubsan runtime lib code, and if you have open-sourced them, please show me their links. Thank you!<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thanks<o:p></o:p></p>
<p class="MsoPlainText">Steven<o:p></o:p></p>
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