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In log_set_category_filter(), passing a negative index lead to memory
corruption. Particularly dangerous since the internal logging categories have
negative values.
Fix: apply map_subsys() to interpret negative values as internal logging
categories.
As a side effect, out-of-bounds logging categories will be mapped to DLGLOBAL
instead of being dropped.
Fix the expectations in logging_test to match the fixed bug.
While at it also guard against a NULL logging target.
Change-Id: Ib0725b22bc39498c6b3970a61eb3339cf56d19f1
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To check category bounds, rather use num_cat_user, to redirect all semantically
unknown categories to DLGLOBAL.
Adjust logging_test expectations accordingly: "(d)" is now also shown.
Note: subsys is and needs to be signed, while num_cat* are unsigned. Thus for a
negative subsys, 'subsys >= num_cat_user' practically always yields true. Pay
close attention to signedness and check upper bound only for positive values.
Change-Id: I4a952b759f30d90fbfb81fedcfc56a8092ea18c1
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In the background osmo_log_info array, the user's logging categories are
enhanced by the library internal ones. So far logging category range checking
only checked for the larger array bounds, although passing a logging category
>= num_cat_user is already semantically unknown and should redirect to
DLGLOBAL.
Add a check to logging_test.c to show that this isn't happening. Instead of
DLGLOBAL, a logging category that happens to be at that index is queried.
The bug is confirmed by logging_test.err only showing "(e)" and not "(d)":
"(e)" is shown because the first category after the user ones happens to be
DLGLOBAL. "(d)" is omitted since it hits a category that's not on debug level.
This bug will be fixed along with the expectation in a subsequent patch.
Change-Id: I397278714018ee9a0ae5101515f31ddddf79c2ec
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In map_subsys(), fix the '>' condition to '>=' for array bounds checking.
Also make the bounds checking more strict: after both invocations of
subsys_lib2index(), re-check validity of the array index. If the final index is
still wrong, which should never happen, exit by assertion.
Change-Id: I7ca1a1d47724e40350f1c4dfebe90bad01c965f9
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For out-of-bounds logging categories, redirect to the proper DLGLOBAL array
index instead of returning -1.
Adjust test expectation which shows that the bugs tested for are fixed.
Note: there are separate bounds checking problems, left for another patch.
Change-Id: I6ea9a59e005a22e0305454291714fdb9531c346b
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Prepares for upcoming modifications of the logging test to show and fix bugs in
the logging system.
Change-Id: I9461b987adf85d87469a6af55de5f1aa478f6ebb
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There doesn't seem to be a reason not to check the filter. Update
and extend the test. Currently the filter function will be called
once for the log check and once for the output of it.
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This commit adds OSMO_ASSERTs for mandatory conditions related to
log_check_level, and fprintfs for optional conditions, since it is
always safe for log_check_level to return != 0.
Sponsored-by: On-Waves ehf
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Add a testcase for the logging facility. The test is coming from
the OpenBSC code.
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