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Re: How to use test-nlist
On Fri, May 24, 2019 at 11:00:57AM +0800, Yu, Mingli wrote:
> On 2019年05月23日 19:50, Mark Wielaard wrote:
> > > # ./tests/test-nlist
> > > nlist failed
> >
> > You are supposed to run it with make check.
> > make check TESTS=test-nlist
> >
> > test-nlist tries to run nlist on itself.
> > So it has to be in the current working directory.
>
> Thanks Mark for your respond!
> As you said "So it has to be in the current working directory.", what do you
> mean? test-nlist needs to locate in the current working directory?
Yes. See the source code.
The test tries to run nlist on "./test-nlist".
> > Basically nlist fills in the n_value and n_scnum with the st_value and
> > st_shndx of the symbol named if found.
> >
> > As you can see for me it corresponds to the values found by:
> >
> > $ eu-readelf -s ./test-nlist | egrep ' (var|bss|main|foo)'
> > 58: 0000000000004048 4 OBJECT GLOBAL DEFAULT 24 var
> > 61: 0000000000004050 4 OBJECT GLOBAL DEFAULT 25 bss
> > 66: 0000000000001310 3 FUNC GLOBAL DEFAULT 14 foo
> > 71: 0000000000001080 408 FUNC GLOBAL DEFAULT 14 main
>
> # which eu-readelf
> /usr/bin/eu-readelf
>
> # /usr/bin/eu-readelf -s tests/test-nlist
> Symbol table [ 5] '.dynsym' contains 11 entries:
> 1 local symbol String table: [ 6] '.dynstr'
> Num: Value Size Type Bind Vis Ndx Name
> 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UNDEF
> 1: 0000000000000000 0 NOTYPE WEAK DEFAULT UNDEF
> _ITM_deregisterTMCloneTable
> 2: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF
> puts@GLIBC_2.2.5 (2)
> 3: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF
> __stack_chk_fail@GLIBC_2.4 (3)
> 4: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF
> __libc_start_main@GLIBC_2.2.5 (2)
> 5: 0000000000000000 0 NOTYPE WEAK DEFAULT UNDEF
> __gmon_start__
> 6: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF
> nlist@ELFUTILS_1.0 (4)
> 7: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF
> __printf_chk@GLIBC_2.3.4 (5)
> 8: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF
> exit@GLIBC_2.2.5 (2)
> 9: 0000000000000000 0 NOTYPE WEAK DEFAULT UNDEF
> _ITM_registerTMCloneTable
> 10: 0000000000000000 0 FUNC WEAK DEFAULT UNDEF
> __cxa_finalize@GLIBC_2.2.5 (2)
For some reason your test-nlist doesn't have an .symtab.
Make sure that when you build the tests CLFAGS contains -g.
And the that test binary isn't accidentially stripped afterwards.
Cheers,
Mark