[Libreoffice-bugs] [Bug 137208] New: osl_getModuleURLFromAddress returns false if getcwd returns an error

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=137208

            Bug ID: 137208
           Summary: osl_getModuleURLFromAddress returns false if getcwd
                    returns an error
           Product: LibreOffice
           Version: Inherited From OOo
          Hardware: All
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: sdk
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: marc-oliver.straub at advantest.com

We had a crash when bootstrapping UNO because someone removed the current
working directory.
Stacktrace:
SEGV
libuno_cppu.so.3(uno_getMapping+0x178)[0x7ffff43372c8]
libuno_cppuhelpergcc3.so.3(+0x64dea)[0x7ffff4bbadea]
libuno_cppuhelpergcc3.so.3(_ZN4cppu40defaultBootstrap_InitialComponentContextERKN3rtl8OUStringE+0x6f9)[0x7ffff4b993b9]

uno_getMapping crashed due to aFrom, aTo being nullptr, caused by
osl_getModuleURLFromAddress always returning false - so no module could be
loaded.

osl_getModuleURLFromAddress called osl_getProcessWorkingDir(workDir), which
returned a nullptr as workDir because the current working dir had been deleted.
This caused osl_getModureURLFromAddress to return false, even though the module
path (as returned by getModulePathFromAddress) was an absolute path.

To improve robustness against such (accidental) work directory removals, I
suggest osl_getModuleURLFromAddress to not check the current working directory
at all, but to delegate checking of the working dir to
osl_getAbsoluteFileURL(...), once the given path is detected to be a relative
path.

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