diff options
Diffstat (limited to 'elf/dso-sort-tests-1.def')
| -rw-r--r-- | elf/dso-sort-tests-1.def | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/elf/dso-sort-tests-1.def b/elf/dso-sort-tests-1.def index 61dc54f8ae..4bf9052db1 100644 --- a/elf/dso-sort-tests-1.def +++ b/elf/dso-sort-tests-1.def @@ -53,14 +53,21 @@ tst-dso-ordering10: {}->a->b->c;soname({})=c output: b>a>{}<a<b # Complex example from Bugzilla #15311, under-linked and with circular -# relocation(dynamic) dependencies. For both sorting algorithms, the -# destruction order is the reverse of the construction order, and -# relocation dependencies are not taken into account. +# relocation(dynamic) dependencies. While this is technically unspecified, the +# presumed reasonable practical behavior is for the destructor order to respect +# the static DT_NEEDED links (here this means the a->b->c->d order). +# The older dynamic_sort=1 algorithm does not achieve this, while the DFS-based +# dynamic_sort=2 algorithm does, although it is still arguable whether going +# beyond spec to do this is the right thing to do. +# The below expected outputs are what the two algorithms currently produce +# respectively, for regression testing purposes. tst-bz15311: {+a;+e;+f;+g;+d;%d;-d;-g;-f;-e;-a};a->b->c->d;d=>[ba];c=>a;b=>e=>a;c=>f=>b;d=>g=>c -output: {+a[d>c>b>a>];+e[e>];+f[f>];+g[g>];+d[];%d(b(e(a()))a()g(c(a()f(b(e(a()))))));-d[];-g[];-f[];-e[];-a[<g<f<e<a<b<c<d];} +output(glibc.rtld.dynamic_sort=1): {+a[d>c>b>a>];+e[e>];+f[f>];+g[g>];+d[];%d(b(e(a()))a()g(c(a()f(b(e(a()))))));-d[];-g[];-f[];-e[];-a[<a<c<d<g<f<b<e];} +output(glibc.rtld.dynamic_sort=2): {+a[d>c>b>a>];+e[e>];+f[f>];+g[g>];+d[];%d(b(e(a()))a()g(c(a()f(b(e(a()))))));-d[];-g[];-f[];-e[];-a[<g<f<a<b<c<d<e];} # Test that even in the presence of dependency loops involving dlopen'ed # object, that object is initialized last (and not unloaded prematurely). -# Final destructor order is the opposite of constructor order. +# Final destructor order is indeterminate due to the cycle. tst-bz28937: {+a;+b;-b;+c;%c};a->a1;a->a2;a2->a;b->b1;c->a1;c=>a1 -output: {+a[a2>a1>a>];+b[b1>b>];-b[<b<b1];+c[c>];%c(a1());}<c<a<a1<a2 +output(glibc.rtld.dynamic_sort=1): {+a[a2>a1>a>];+b[b1>b>];-b[<b<b1];+c[c>];%c(a1());}<a<a2<c<a1 +output(glibc.rtld.dynamic_sort=2): {+a[a2>a1>a>];+b[b1>b>];-b[<b<b1];+c[c>];%c(a1());}<a2<a<c<a1 |