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commit daac426f79e4eb166f2098626abe2a5f7d92a4e3
Author: anjiahao <anjia...@xiaomi.com>
AuthorDate: Thu Jul 18 20:53:17 2024 +0800
gdb python plugin:add hexdump command support
hexdump useful to debug
format such as:
(gdb) hexdump 0x0062fd30 500
0062fd30 73 68 6f 77 5f 76 61 72 69 61 62 6c 65 3a 20 45 show_variable: E
0062fd40 52 52 4f 52 20 56 61 72 69 61 62 6c 65 3d 25 73 RROR Variable=%s
0062fd50 20 68 61 73 20 74 68 65 20 77 72 6f 6e 67 20 76 has the wrong v
0062fd60 61 6c 75 65 0a 00 6f 73 74 65 73 74 5f 6d 61 69 alue..ostest_mai
0062fd70 6e 2e 63 00 73 68 6f 77 5f 76 61 72 69 61 62 6c n.c.show_variabl
0062fd80 65 3a 20 45 52 52 4f 52 20 56 61 72 69 61 62 6c e: ERROR Variabl
0062fd90 65 3d 25 73 20 68 61 73 20 61 20 76 61 6c 75 65 e=%s has a value
0062fda0 20 77 68 65 6e 20 69 74 20 73 68 6f 75 6c 64 20 when it should
0062fdb0 6e 6f 74 0a 00 73 68 6f 77 5f 76 61 72 69 61 62 not..show_variab
Signed-off-by: anjiahao <anjia...@xiaomi.com>
---
tools/gdb/utils.py | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 48 insertions(+), 1 deletion(-)
diff --git a/tools/gdb/utils.py b/tools/gdb/utils.py
index d030a53eb3..17474a2609 100644
--- a/tools/gdb/utils.py
+++ b/tools/gdb/utils.py
@@ -21,7 +21,7 @@
############################################################################
import gdb
-
+import re
class CachedType:
"""Cache a type object, so that we can reconnect to the new_objfile
event"""
@@ -188,3 +188,50 @@ def get_symbol_value(name):
gdb.execute("set $_%s = %s" % (name, name))
return gdb.parse_and_eval("$_%s" % name)
+
+def hexdump(address, size):
+ inf = gdb.inferiors()[0]
+ mem = inf.read_memory(address, size)
+ bytes = mem.tobytes()
+ for i in range(0, len(bytes), 16):
+ chunk = bytes[i:i+16]
+ gdb.write(f"{i + address:08x} ")
+ hex_values = " ".join(f"{byte:02x}" for byte in chunk)
+ hex_display = f"{hex_values:<47}"
+ gdb.write(hex_display)
+ ascii_values = "".join(chr(byte) if 32 <= byte <= 126 else "." for
byte in chunk)
+ gdb.write(f" {ascii_values} \n")
+
+
+def is_decimal(s):
+ return re.fullmatch(r"\d+", s) is not None
+
+def is_hexadecimal(s):
+ return re.fullmatch(r"0[xX][0-9a-fA-F]+|[0-9a-fA-F]+", s) is not None
+
+class Hexdump(gdb.Command):
+ """hexdump address/symbol <size>"""
+
+ def __init__(self):
+ super(Hexdump, self).__init__("hexdump", gdb.COMMAND_USER)
+ def invoke(self, args, from_tty):
+ argv = args.split(" ")
+ argc = len(argv)
+ address = 0
+ size = 0
+ if (argv[0] == ""):
+ gdb.write("Usage: hexdump address/symbol <size>\n")
+ return
+
+ if is_decimal(argv[0]) or is_hexadecimal(argv[0]):
+ address = int(argv[0], 0)
+ size = int(argv[1], 0)
+ else:
+ var = gdb.parse_and_eval(f'{argv[0]}')
+ address = int(var.address)
+ size = int(var.type.sizeof)
+ gdb.write(f"{argv[0]} {hex(address)} {int(size)}\n")
+
+ hexdump(address, size)
+
+Hexdump()
