On 2019年05月23日 19:50, Mark Wielaard wrote:
On Thu, May 23, 2019 at 04:52:39PM +0800, Yu, Mingli wrote:
I run some tests about elfutils, but one test as test-nlist always fails as
below:
# ./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?
As you do below:
# cd tests
# ./test-nlist -d
nl[0].n_name = "var"
nl[0].n_value = 0
nl[0].n_scnum = 0
nl[0].n_type = 0
nl[0].n_sclass = 0
nl[0].n_numaux = 0
nl[1].n_name = "bss"
nl[1].n_value = 0
nl[1].n_scnum = 0
nl[1].n_type = 0
nl[1].n_sclass = 0
nl[1].n_numaux = 0
nl[2].n_name = "main"
nl[2].n_value = 0
nl[2].n_scnum = 0
nl[2].n_type = 0
nl[2].n_sclass = 0
nl[2].n_numaux = 0
nl[3].n_name = "foo"
nl[3].n_value = 0
nl[3].n_scnum = 0
nl[3].n_type = 0
nl[3].n_sclass = 0
nl[3].n_numaux = 0
nl[4].n_name = "not-there"
nl[4].n_value = 0
nl[4].n_scnum = 0
nl[4].n_type = 0
nl[4].n_sclass = 0
nl[4].n_numaux = 0
# echo $?
1
For some reason all the n_ fields come out as zero. That is not what
the test expects (except for the last "not-there" entry. It should
look somethng like:
nl[0].n_name = "var"
nl[0].n_value = 16456
nl[0].n_scnum = 24
nl[0].n_type = 1
nl[0].n_sclass = 0
nl[0].n_numaux = 0
nl[1].n_name = "bss"
nl[1].n_value = 16464
nl[1].n_scnum = 25
nl[1].n_type = 1
nl[1].n_sclass = 0
nl[1].n_numaux = 0
nl[2].n_name = "main"
nl[2].n_value = 4224
nl[2].n_scnum = 14
nl[2].n_type = 2
nl[2].n_sclass = 0
nl[2].n_numaux = 0
nl[3].n_name = "foo"
nl[3].n_value = 4880
nl[3].n_scnum = 14
nl[3].n_type = 2
nl[3].n_sclass = 0
nl[3].n_numaux = 0
nl[4].n_name = "not-there"
nl[4].n_value = 0
nl[4].n_scnum = 0
nl[4].n_type = 0
nl[4].n_sclass = 0
nl[4].n_numaux = 0
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)
Thanks,
Hope that helps you debug.
Cheers,
Mark
