tests: add coverage for versioned SONAME resolution

Add tests for bcc_procutils_which_so{_in_process}() to verify correct
behavior when resolving versioned SONAME fragments.

Use library with long-stable SONAME version (libc.so.6),
which have remained unchanged for over a decade and ensure
deterministic results across systems.

Signed-off-by: Hoyeon Lee <[email protected]>

Author: HoyeonRhee

tests/cc/test_c_api.cc

@@ -70,6 +70,30 @@ TEST_CASE("shared object resolution using loaded libraries with the generalized
   free(libelf);
 }
 
+TEST_CASE("versioned shared object resolution with the generalized function", "[c_api]") {
+  char *libc = bcc_procutils_which_so("c.so.6", 0);
+  REQUIRE(libc);
+  REQUIRE(libc[0] == '/');
+  REQUIRE(string(libc).find("libc.so.6") != string::npos);
+  free(libc);
+}
+
+TEST_CASE("versioned shared object resolution using loaded libraries", "[c_api]") {
+  char *libc = bcc_procutils_which_so_in_process("c.so.6", getpid());
+  REQUIRE(libc);
+  REQUIRE(libc[0] == '/');
+  REQUIRE(string(libc).find("libc.so.6") != string::npos);
+  free(libc);
+}
+
+TEST_CASE("versioned shared object resolution using loaded libraries with the generalized function", "[c_api]") {
+  char *libc = bcc_procutils_which_so("c.so.6", getpid());
+  REQUIRE(libc);
+  REQUIRE(libc[0] == '/');
+  REQUIRE(string(libc).find("libc.so.6") != string::npos);
+  free(libc);
+}
+
 TEST_CASE("binary resolution with `which`", "[c_api]") {
   char *ld = bcc_procutils_which("ld");
   REQUIRE(ld);