[lldb][lldb-dap] Added support for "WriteMemory" request. (#131820)

Added debug adapter support for write memory.

---------

Co-authored-by: Santhosh Kumar Ellendula <sellendu@hu-sellendu-hyd.qualcomm.com>
Co-authored-by: Santhosh Kumar Ellendula <sellendu@hu-sellendu-lv.qualcomm.com>

2 files changed, 32 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/dap_server.py b/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/dap_server.py
index d227a66..68f58bf 100644
--- a/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/dap_server.py
+++ b/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/dap_server.py
@@ -831,6 +831,20 @@ class DebugCommunication(object):
         }
         return self.send_recv(command_dict)
 
+    def request_writeMemory(self, memoryReference, data, offset=0, allowPartial=True):
+        args_dict = {
+            "memoryReference": memoryReference,
+            "offset": offset,
+            "allowPartial": allowPartial,
+            "data": data,
+        }
+        command_dict = {
+            "command": "writeMemory",
+            "type": "request",
+            "arguments": args_dict,
+        }
+        return self.send_recv(command_dict)
+
     def request_evaluate(self, expression, frameIndex=0, threadId=None, context=None):
         stackFrame = self.get_stackFrame(frameIndex=frameIndex, threadId=threadId)
         if stackFrame is None:
diff --git a/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/lldbdap_testcase.py b/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/lldbdap_testcase.py
index 6299caf..00b01d4 100644
--- a/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/lldbdap_testcase.py
+++ b/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/lldbdap_testcase.py
@@ -8,6 +8,7 @@ from dap_server import Source
 from lldbsuite.test.lldbtest import *
 from lldbsuite.test import lldbplatformutil
 import lldbgdbserverutils
+import base64
 
 
 class DAPTestCaseBase(TestBase):
@@ -506,3 +507,20 @@ class DAPTestCaseBase(TestBase):
                 self.dap_server.request_disconnect(terminateDebuggee=True)
                 self.assertIsNotNone(server_tool, "debugserver not found.")
         return server_tool
+
+    def writeMemory(self, memoryReference, data=None, offset=None, allowPartial=None):
+        # This function accepts data in decimal and hexadecimal format,
+        # converts it to a Base64 string, and send it to the DAP,
+        # which expects Base64 encoded data.
+        encodedData = (
+            ""
+            if data is None
+            else base64.b64encode(
+                # (bit_length + 7 (rounding up to nearest byte) ) //8 = converts to bytes.
+                data.to_bytes((data.bit_length() + 7) // 8, "little")
+            ).decode()
+        )
+        response = self.dap_server.request_writeMemory(
+            memoryReference, encodedData, offset=offset, allowPartial=allowPartial
+        )
+        return response