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| author | Kaz Kylheku <kaz@kylheku.com> | 2021-06-24 22:01:38 -0700 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2021-06-24 22:01:38 -0700 |
| commit | 817cd5991d6304a2368824acbfc0b0e95c2aa7a7 (patch) | |
| tree | 4aa5e7b112cdf41d2a713e42562f9699c8839dd3 /tests/012/stack.tl | |
| parent | 1c1685861e0d304f60f0669c6dbd5005349262e4 (diff) | |
| download | txr-817cd5991d6304a2368824acbfc0b0e95c2aa7a7.tar.gz txr-817cd5991d6304a2368824acbfc0b0e95c2aa7a7.tar.bz2 txr-817cd5991d6304a2368824acbfc0b0e95c2aa7a7.zip | |
signals: disable stack overflow in handler.
* signal.c (sig_handler): For a is_cpu_exception signal, we
temporarily disable the stack limit. It might be executing on
the sigaltstack buffer, which is almost certainly below the
stack limit.
* tests/012/stack.tl: New test case. We raise a SIGSEGV
and check that in the handler, the stack limit is disabled,
and that we can executed code.
Diffstat (limited to 'tests/012/stack.tl')
| -rw-r--r-- | tests/012/stack.tl | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tests/012/stack.tl b/tests/012/stack.tl index a8d06487..879d3d27 100644 --- a/tests/012/stack.tl +++ b/tests/012/stack.tl @@ -29,3 +29,14 @@ (set-stack-limit orig) nil (set-stack-limit 65536) orig (set-stack-limit orig) 65536) + +(set-sig-handler sig-segv + (lambda (signal async-p) + (assert (null (get-stack-limit))) + (throw 'out))) + +(test + (catch + (raise sig-segv) + (out () :sig)) + :sig) |