1 files changed, 56 insertions, 0 deletions
diff --git a/deps/v8/test/debugging/wasm/gdb-server/stepping.py b/deps/v8/test/debugging/wasm/gdb-server/stepping.py
new file mode 100644
index 00000000000..bc227ef2b06
--- /dev/null
+++ b/deps/v8/test/debugging/wasm/gdb-server/stepping.py
@@ -0,0 +1,56 @@
+# Copyright 2020 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Flags: -expose-wasm --wasm-gdb-remote --wasm-pause-waiting-for-debugger test/debugging/wasm/gdb-server/test_files/test_basic.js
+
+import sys
+import unittest
+
+import gdb_rsp
+import test_files.test_basic as test_basic
+
+# These are set up by Main().
+COMMAND = None
+
+class Tests(unittest.TestCase):
+  def test_single_step(self):
+    with gdb_rsp.LaunchDebugStub(COMMAND) as connection:
+      module_load_addr = gdb_rsp.GetLoadedModuleAddress(connection)
+      bp_addr = module_load_addr + test_basic.BREAK_ADDRESS_0
+      reply = connection.RspRequest('Z0,%x,1' % bp_addr)
+      self.assertEqual("OK", reply)
+      reply = connection.RspRequest('c')
+      gdb_rsp.AssertReplySignal(reply, gdb_rsp.SIGTRAP)
+
+      # We expect 's' to stop at the next instruction.
+      reply = connection.RspRequest('s')
+      gdb_rsp.AssertReplySignal(reply, gdb_rsp.SIGTRAP)
+      tid = gdb_rsp.ParseThreadStopReply(reply)['thread_id']
+      self.assertEqual(tid, 1)
+      regs = gdb_rsp.DecodeRegs(connection.RspRequest('g'))
+      self.assertEqual(regs['pc'], module_load_addr + test_basic.BREAK_ADDRESS_1)
+
+      # Again.
+      reply = connection.RspRequest('s')
+      gdb_rsp.AssertReplySignal(reply, gdb_rsp.SIGTRAP)
+      tid = gdb_rsp.ParseThreadStopReply(reply)['thread_id']
+      self.assertEqual(tid, 1)
+      regs = gdb_rsp.DecodeRegs(connection.RspRequest('g'))
+      self.assertEqual(regs['pc'], module_load_addr + test_basic.BREAK_ADDRESS_2)
+
+      # Check that we can continue after single-stepping.
+      reply = connection.RspRequest('c')
+      gdb_rsp.AssertReplySignal(reply, gdb_rsp.SIGTRAP)
+
+
+def Main():
+  index = sys.argv.index('--')
+  args = sys.argv[index + 1:]
+  # The remaining arguments go to unittest.main().
+  global COMMAND
+  COMMAND = args
+  unittest.main(argv=sys.argv[:index])
+
+if __name__ == '__main__':
+  Main()