Add tests for dt command (#2398)

tests/gdb-tests/tests/test_command_dt.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import re
+
+import gdb
+
+import tests
+
+HEAP_MALLOC_CHUNK = tests.binaries.get("heap_malloc_chunk.out")
+
+
+def test_command_dt_works_with_address(start_binary):
+    start_binary(HEAP_MALLOC_CHUNK)
+    gdb.execute("break break_here")
+    gdb.execute("continue")
+
+    tcache = gdb.execute("print tcache", to_string=True)
+
+    tcache_addr = tcache.split()[-1]
+
+    out = gdb.execute(f'dt "struct tcache_perthread_struct" {tcache_addr}', to_string=True)
+
+    exp_regex = (
+        "struct tcache_perthread_struct @ 0x[0-9a-f]+\n"
+        "    0x[0-9a-f]+ \\+0x0000 counts               : uint16_t \\[64\\]\n"
+        "    0x[0-9a-f]+ \\+0x[0-9a-f]{4} entries              : tcache_entry \\*\\[64\\]\n"
+    )
+    assert re.match(exp_regex, out)
+
+
+def test_command_dt_works_with_no_address(start_binary):
+    start_binary(HEAP_MALLOC_CHUNK)
+    gdb.execute("break break_here")
+    gdb.execute("continue")
+
+    out = gdb.execute('dt "struct tcache_perthread_struct"', to_string=True)
+
+    exp_regex = (
+        "struct tcache_perthread_struct\n"
+        "    \\+0x0000 counts               : uint16_t \\[64\\]\n"
+        "    \\+0x[0-9a-f]{4} entries              : tcache_entry \\*\\[64\\]\n"
+    )
+    assert re.match(exp_regex, out)