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. 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 Hope that helps you debug. Cheers, Mark
