[Lldb-commits] [PATCH] Initial Assembly profiler for mips64
vharron at google.com
Wed Feb 18 20:52:00 PST 2015
> I should start with at least simple x86 unwinder test cases that work
correctly on Mac as a step 0.
That would be incredibly helpful. I've asked ARM/Linaro, Imagination and
Intel for help on LLDB. Your examples in one architecture could be
templates for examples in other architectures.
If you don't have time for that, just putting together a doc of things for
them to check would be incredibly valuable.
On Feb 18, 2015 8:46 PM, "Jason Molenda" <jmolenda at apple.com> wrote:
> For what it's worth, an example of a test file for this code would be a
> driver program written in C for simplicity which calls under1() written in
> assembly, which in turn calls under2(). lldb would stop in under2(), go up
> the stack to under1() and try to print a register that was preserved.
> Some utterly invalid syntax for a test file would look like:
> int main()
> mov r16, 1
> call under2
> sd r16(sp) # I have no idea if that is right -- save contents of
> r16 on the local stack frame
> mov r16, 5
> call puts ## whatever, stop at a breakpoint here
> If lldb could select frame 1 and see that r16 has the value 1, that's a
> simple test case.
> But this test could only be run on a mips64 system.
> I want to add test cases like this for x86 but it might take some fiddling
> to get assembly that would work on all the Unix x86 systems at least
> (nevermind Windows! ;) and I've never gotten around to it. I should start
> with at least simple x86 unwinder test cases that work correctly on Mac as
> a step 0.
> rL LLVM
> EMAIL PREFERENCES
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