debug: add page and frame formatters

1 files changed, 41 insertions, 0 deletions

diff --git a/kapi/gdb/memory/chunk.py b/kapi/gdb/memory/chunk.py
new file mode 100644
index 0000000..74b1407
--- /dev/null
+++ b/kapi/gdb/memory/chunk.py
@@ -0,0 +1,41 @@
+import gdb
+from teachos import format_size
+
+
+class KapiMemoryChunkPrinter(gdb.ValuePrinter):
+
+    def __init__(self, val: gdb.Value, typename="chunk"):
+        self.__val = val
+        try:
+            self.__number = int(val["m_number"])
+        except gdb.error:
+            self.__number = "<number unreadable>"
+
+        try:
+            self.__size = int(gdb.parse_and_eval(f"{val.type.name}::size")["value"])
+        except gdb.error:
+            self.__size = "<size unreadable>"
+
+        self.__typename = typename
+
+    def to_string(self):
+        return f"{self.__typename} {self.__number} of size {format_size(self.__size)}"
+
+    def children(self):
+        yield ("number", self.__number)
+        yield ("size", self.__size)
+
+    def display_hint(self):
+        return None
+
+
+class KapiMemoryFramePrinter(KapiMemoryChunkPrinter):
+
+    def __init__(self, val):
+        super().__init__(val, "frame")
+
+
+class KapiMemoryPagePrinter(KapiMemoryChunkPrinter):
+
+    def __init__(self, val):
+        super().__init__(val, "page")