[New-bugs-announce] [issue33137] line traces may be missed on backward jumps when instrumented with dtrace

[Xavier de Gaye]

New submission from Xavier de Gaye <xdegaye at gmail.com>:

In _PyEval_EvalFrameDefault(), the call to maybe_dtrace_line() sets frame->f_lasti to instr_prev and for that reason, in the ensuing call to maybe_call_line_trace(), the call_trace() function with PyTrace_LINE is not called as it should when a backward jump is not to the first instruction of the line.

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components: Interpreter Core
messages: 314408
nosy: lukasz.langa, serhiy.storchaka, xdegaye
priority: normal
severity: normal
stage: needs patch
status: open
title: line traces may be missed on backward jumps when instrumented with dtrace
type: behavior
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33137>
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