support/testing: add ltrace runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -1790,6 +1790,7 @@ F:	support/testing/tests/package/test_less.py
 F:	support/testing/tests/package/test_libgpgme.py
 F:	support/testing/tests/package/test_libjxl.py
 F:	support/testing/tests/package/test_lrzip.py
+F:	support/testing/tests/package/test_ltrace.py
 F:	support/testing/tests/package/test_lzip.py
 F:	support/testing/tests/package/test_lsof.py
 F:	support/testing/tests/package/test_lz4.py

support/testing/tests/package/test_ltrace.py

@@ -0,0 +1,32 @@
+import os
+
+import infra.basetest
+
+
+class TestLtrace(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_PACKAGE_LTRACE=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
+        self.emulator.boot(arch="armv5",
+                           kernel="builtin",
+                           options=["-initrd", cpio_file])
+        self.emulator.login()
+
+        # Check the program can execute
+        self.assertRunOk("ltrace --version")
+
+        # Run ltrace on a ls
+        cmd = "ltrace -a 0 -o ltrace.log ls /"
+        self.assertRunOk(cmd)
+
+        # Check the ltrace log contains occurrences of libc malloc()
+        cmd = "grep -Ec 'malloc\\([0-9]+\\)' ltrace.log"
+        out, ret = self.emulator.run(cmd)
+        self.assertEqual(ret, 0)
+        self.assertGreater(int(out[0]), 0)