introduce a new monitor command 'dump-guest-memory' to dump guest's memory
The command's usage:
dump-guest-memory [-p] protocol [begin] [length]
The supported protocol can be file or fd:
1. file: the protocol starts with "file:", and the following string is
the file's path.
2. fd: the protocol starts with "fd:", and the following string is the
fd's name.
Note:
1. If you want to use gdb to process the core, please specify -p option.
The reason why the -p option is not default is:
a. guest machine in a catastrophic state can have corrupted memory,
which we cannot trust.
b. The guest machine can be in read-mode even if paging is enabled.
For example: the guest machine uses ACPI to sleep, and ACPI sleep
state goes in real-mode.
2. If you don't want to dump all guest's memory, please specify the start
physical address and the length.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/hmp.c b/hmp.c
index bb0952e..42ced2a 100644
--- a/hmp.c
+++ b/hmp.c
@@ -947,3 +947,25 @@
qmp_device_del(id, &err);
hmp_handle_error(mon, &err);
}
+
+void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict)
+{
+ Error *errp = NULL;
+ int paging = qdict_get_try_bool(qdict, "paging", 0);
+ const char *file = qdict_get_str(qdict, "protocol");
+ bool has_begin = qdict_haskey(qdict, "begin");
+ bool has_length = qdict_haskey(qdict, "length");
+ int64_t begin = 0;
+ int64_t length = 0;
+
+ if (has_begin) {
+ begin = qdict_get_int(qdict, "begin");
+ }
+ if (has_length) {
+ length = qdict_get_int(qdict, "length");
+ }
+
+ qmp_dump_guest_memory(paging, file, has_begin, begin, has_length, length,
+ &errp);
+ hmp_handle_error(mon, &errp);
+}
