Profile: Fix checks of remaining backtrace buffer #36006
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I'll close this as there are other PRs which modify the |
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I've rebased the commit and am re-opening this PR. cc: @vtjnash |
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Fixes #35870
jl_unw_stepnrequires a free space ofJL_BT_MAX_ENTRY_SIZE + 1regardless of the actual entry size. Therefore, the tail of the backtrace buffer is eventually filled with sentinel, i.e.0.It is necessary to export
JL_BT_ MAX_ENTRY_SIZEto detect the buffer fullness in the Profile package. For this reason, and in order to commonize the code between OSs, this PR addsjl_profile_is_buffer_full().Edit:I don't feel that this change is as simple as the problem which this fixes (i.e. the display of a warning).Therefore, hoping that the backtrace handling will be radically improved in the future, I think that it is enough to add a broken test for now.