elf: Add dlmopen / RTLD_SHARED testsazanella/rtld-shared

We ensure a DF_GNU_1_UNIQUE library is loaded (as a DT_NEEDED
dependency) into the target namespace by the test module.

This checks that the code path for dependencies honours the flag
and prepares a base namespace library with a proxy in the target
namespace (since the mechanism for this is not the same as for
DSOs that have already been loaded into the base namespace).

Checked on x86_64-linux-gnu and i686-linux-gnu.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/elf/tst-dlmopen-rtld-unique6.h b/elf/tst-dlmopen-rtld-unique6.h
new file mode 100644
index 0000000000..062f1f2277
--- /dev/null
+++ b/elf/tst-dlmopen-rtld-unique6.h
@@ -0,0 +1,51 @@
+static dlmopen_test_spec dltest[] =
+  {
+   {
+    .name = "dlmopen-isolate-unique:1:none--ns1--prep",
+    .desc = "dlmopen a DF_GNU_1_UNIQUE dso into NS1 with RTLD_ISOLATE",
+    .is_prep_stage = 1,
+    .args.dso_path = DSO_UNIQUE,
+    .args.ns = LM_ID_NEWLM,
+    .args.flags = RTLD_ISOLATE,
+    .handle_ns = EXPECTED_NS,
+    .free_ns = EXPECTED_NS,
+    .handle_type = DSO,
+    .preloaded = { },
+    .loaded = { [EXPECTED_NS] = DSO|NEW },
+   },
+   {
+    .name = "dlmopen-unique:1:nsX--nsX--FAIL",
+    .desc = "dlmopen a DF_GNU_1_UNIQUE dso into NSX when already there",
+    .args.dso_path = DSO_UNIQUE,
+    .args.ns = EXPECTED_NS,
+    .failure = 1,
+    .preloaded = { [EXPECTED_NS] = DSO },
+   },
+   {
+    .name = "dlmopen-shared-unique:X:nsX--nsX--FAIL",
+    .desc = "dlmopen RTLD_SHARED a DF_GNU_1_UNIQUE dso into NSX when already there",
+    .args.dso_path = DSO_UNIQUE,
+    .args.ns = EXPECTED_NS,
+    .args.flags = RTLD_SHARED,
+    .failure = 1,
+    .preloaded = { [EXPECTED_NS] = DSO },
+   },
+   {
+    .name = "dlmopen-shared-unique:0:nsX--ns0-nsX",
+    .desc = "dlmopen RTLD_SHARED a DF_GNU_1_UNIQUE dso already present in NS X",
+    .args.dso_path = DSO_UNIQUE,
+    .args.ns = LM_ID_BASE,
+    .handle_ns = 0,
+    .handle_type = DSO,
+    .preloaded = { [EXPECTED_NS] = DSO },
+    .loaded = { [0] = DSO|NEW, [EXPECTED_NS] = DSO },
+   },
+   {
+    .name = "dlmopen-shared-unique:X:ns0-nsX--ns0-nsX--FAIL",
+    .desc = "dlmopen RTLD_SHARED a DF_GNU_1_UNIQUE dso already in the base NS and NS 1",
+    .args.dso_path = DSO_UNIQUE,
+    .args.ns = EXPECTED_NS,
+    .failure = 1,
+    .preloaded = { [0] = DSO, [EXPECTED_NS] = DSO },
+   },
+  };