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bombela / backward-cpp

A beautiful stack trace pretty printer for C++
MIT License
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How to get values output in stacktrace? #224

Closed alexezeder closed 3 years ago

alexezeder commented 3 years ago

I have a question, maybe someone can clarify one point to me, I will start with these lines from backward.hpp:

Currently, I don't have any values in stacktraces for executables with debug info, only names. So the question is - how can I enable output of values? Is it implemented for the specified implementations, if not then maybe it shouldn't be stated?

bombela commented 3 years ago

This is the list of features those DWARF reader libraries support. backward-cpp doesn't print then. In theory it is possible to though.

On Wed, 2 Jun 2021, 09:52 Alexey Ochapov, @.***> wrote:

I have a question, maybe someone can clarify one point to me, I will start with these lines from backward.hpp:

-

from #define BACKWARD_HAS_DW 1:

https://github.com/bombela/backward-cpp/blob/77946058afe52a1d43f5b6243384fe45e7c2aa64/backward.hpp#L146

from #define BACKWARD_HAS_DWARF 1:

https://github.com/bombela/backward-cpp/blob/77946058afe52a1d43f5b6243384fe45e7c2aa64/backward.hpp#L169

Currently, I don't have any values in stacktraces, only names, so the question is - how can I enable output of values? Is it implemented for the specified implementations, if not then maybe it shouldn't be stated?

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alexezeder commented 3 years ago

Ok, thanks for the quick response.

I can say that it confused me, I thought it's already supported.

But if it's not a problem in your opinion, then this issue can be closed, I guess...

bombela commented 3 years ago

Feel free to submit a PR that adds something like "(not supported bat backward-cpp)" in the code.

I think I recall trying to get the variables. And I am afraid you have to basically implement a C++ expression parser to resolve theirs value. That's what GDB does it I remember correctly.

On Wed, 2 Jun 2021, 10:20 Alexey Ochapov, @.***> wrote:

Ok, thanks for the quick response.

I can say that it confused me, I thought it's already supported.

But if it's not a problem in your opinion, then this issue can be closed, I guess...

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