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gh-91048: Add support for reconstructing async call stacks #103976

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gh-91048: Add support for reconstructing async call stacks #103976

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ba18f2d
Add support for reconstructing async call stacks
mpage Apr 20, 2023
975bd29
Fix formatting of blurb
mpage Apr 28, 2023
669fe71
Fix style for `_PyAwaitable_SetAwaiter`
mpage Apr 28, 2023
9e234bb
Revert newline removal
mpage Apr 28, 2023
34e674e
Fix inline literal syntax in blurb
mpage Apr 28, 2023
c8c348a
Move awaiter setting after specialization block and fix check in `SEN…
mpage May 1, 2023
67f2394
Merge branch 'main' into port-awaiters
mpage May 1, 2023
5f63310
Handle case where the task's coroutine is NULL
mpage May 1, 2023
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Fix formatting of blurb
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@mpage
mpage committed Apr 28, 2023
commit 975bd293ed3db6492dbbb3e80d23835f9953aa56
12 changes: 9 additions & 3 deletions Misc/NEWS.d/next/Core and Builtins/2023-04-28-08-59-23.gh-issue-91048.IghN67.rst
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Expand Up @@ -2,10 +2,16 @@ When profiling an async Python application it's useful to see both the stack
for the currently executing task as well as the chain of coroutines that are
transitively awaiting the task. Consider the following example, where T
represents a task, C represents a coroutine, and A '->' B indicates A is
awaiting B.
awaiting B::

T0 +---> T1 | | | C0 | C2 | |
| v | v C1 | C3 | | +-----|
T0 +---> T1
| | |
C0 | C2
| | |
v | v
C1 | C3
| |
+-----|

The async stack from C3 would be C3, C2, C1, C0. In contrast, the
synchronous call stack while C3 is executing is only C3, C2. It's possible
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