support was detected in the 2nd time. Since iMessage comes from [[[self conversation]
sendingService] __ck_displayName], what is the return value of [self conversation] and [[self
conversation] sendingService]? No hurry, we will get to them one by one.
Reinput the address and set 2 breakpoints on the first 2 objc_msgSends in
[CKMessageEntryView updateEntryView] respectively. Then press “return” to trigger the
breakpoints:
Process 14235 stopped
* thread #1: tid = 0x379b, 0x2b528948 ChatKit`-[CKMessageEntryView updateEntryView] +
28, queue = 'com.apple.main-thread, stop reason = breakpoint 1.1
frame #0: 0x2b528948 ChatKit`-[CKMessageEntryView updateEntryView] + 28
ChatKit`-[CKMessageEntryView updateEntryView] + 28:
0x2b528948: blx 0x2b5f5f44 ; symbol stub for:
MarcoShouldLogMadridLevel$shim
0x2b52894c: mov r6, r0
0x2b52894e: movw r0, #51162
0x2b528952: movt r0, #2547
(lldb) p (char )$r1
(char ) $6 = 0x2b60cc16 "conversation"
(lldb) ni
Process 14235 stopped
- thread #1: tid = 0x379b, 0x2b52894c ChatKit
-[CKMessageEntryView updateEntryView] + 32, queue = 'com.apple.main-thread, stop reason = instruction step over frame #0: 0x2b52894c ChatKit-[CKMessageEntryView updateEntryView] + 32
ChatKit`-[CKMessageEntryView updateEntryView] + 32:
0x2b52894c: mov r6, r0
0x2b52894e: movw r0, #51162
0x2b528952: movt r0, #2547
0x2b528956: add r0, pc
(lldb) po $r0
CKPendingConversation<0x1587e870>{identifier:'(null)' guid:'(null)'}(null)
The return value of [self conversation] is a CKPendingConversation object. OK, now look at
the next one:
(lldb) c
Process 14235 resuming
Process 14235 stopped
* thread #1: tid = 0x379b, 0x2b52895e ChatKit`-[CKMessageEntryView updateEntryView] +
50, queue = 'com.apple.main-thread, stop reason = breakpoint 2.1
frame #0: 0x2b52895e ChatKit`-[CKMessageEntryView updateEntryView] + 50
ChatKit`-[CKMessageEntryView updateEntryView] + 50:
0x2b52895e: blx 0x2b5f5f44 ; symbol stub for:
MarcoShouldLogMadridLevel$shim
0x2b528962: mov r8, r0
0x2b528964: movw r0, #52792
0x2b528968: movt r0, #2547
(lldb) p (char )$r1
(char ) $8 = 0x2b6105e1 "sendingService"
(lldb) ni
Process 14235 stopped
- thread #1: tid = 0x379b, 0x2b528962 ChatKit
-[CKMessageEntryView updateEntryView] + 54, queue = 'com.apple.main-thread, stop reason = instruction step over frame #0: 0x2b528962 ChatKit-[CKMessageEntryView updateEntryView] + 54