examples/sotest: Check that a library can be opened twice - #3691
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dlopen() of an already loaded library used to fail, so nothing exercised what happens when two callers hold the same object. Open the library a second time, check the same handle comes back, close one of the two and check the library is still usable through the other. Needs the counterpart change in nuttx; without it the second dlopen() returns NULL and this reports it. Assisted-by: Claude Opus 5 (1M context) <noreply@anthropic.com> Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
cederom
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xiaoxiang781216
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Depends-on: apache/nuttx#19639
Summary
dlopen()of an already loaded library used to fail, so nothing exercised what happens when two callers hold the same object.This opens the library a second time, checks the same handle comes back, closes one of the two handles and checks the library is still usable through the other.
Testing
Without apache/nuttx#19639 the second
dlopen()returnsNULLand this test reports it.Run on
lm3s6965-ekunder QEMU withCONFIG_EXAMPLES_SOTEST,CONFIG_ELF,CONFIG_LIBC_ELFandCONFIG_LIBC_DLFCN.Without apache/nuttx#19639:
With it:
The repeated
testfunc1is the library still working after one of the two handles was closed, andmodule_uninitializeis it unloading once the last one went.