[lldb/crashlog] Fix breaking changes in textual report format (llvm#83861)

This patch should address some register parsing issue in the legacy
report format.

rdar://107210149

Signed-off-by: Med Ismail Bennani <[email protected]>

Author: medismailben

lldb/examples/python/crashlog.py

@@ -849,10 +849,10 @@ def parse_errors(self, json_data):
 
 class TextCrashLogParser(CrashLogParser):
     parent_process_regex = re.compile(r"^Parent Process:\s*(.*)\[(\d+)\]")
-    thread_state_regex = re.compile(r"^Thread \d+ crashed with")
+    thread_state_regex = re.compile(r"^Thread (\d+ crashed with|State)")
     thread_instrs_regex = re.compile(r"^Thread \d+ instruction stream")
-    thread_regex = re.compile(r"^Thread (\d+).*:")
-    app_backtrace_regex = re.compile(r"^Application Specific Backtrace (\d+).*:")
+    thread_regex = re.compile(r"^Thread (\d+).*")
+    app_backtrace_regex = re.compile(r"^Application Specific Backtrace (\d+).*")
 
     class VersionRegex:
         version = r"\(.+\)|(?:arm|x86_)[0-9a-z]+"
@@ -1081,7 +1081,10 @@ def parse_normal(self, line):
             if thread_state_match:
                 self.app_specific_backtrace = False
                 thread_state_match = self.thread_regex.search(line)
-                thread_idx = int(thread_state_match.group(1))
+                if thread_state_match:
+                    thread_idx = int(thread_state_match.group(1))
+                else:
+                    thread_idx = self.crashlog.crashed_thread_idx
                 self.parse_mode = self.CrashLogParseMode.THREGS
                 self.thread = self.crashlog.threads[thread_idx]
                 return

lldb/test/Shell/ScriptInterpreter/Python/Crashlog/Inputs/altered_threadState.crash

@@ -0,0 +1,50 @@
+Process:               a.out [21606]
+Path:                  /private/tmp/a.out
+Identifier:            a.out
+Version:               0
+Code Type:             X86-64 (Native)
+Parent Process:        fish [88883]
+User ID:               501
+
+Date/Time:             2020-11-11 14:47:34.600 -0800
+OS Version:            macOS 11.0.1
+Report Version:        12
+Bridge OS Version:     redacted
+Anonymous UUID:        DCEF35CB-68D5-F524-FF13-060901F52EA8
+
+
+Time Awake Since Boot: 400000 seconds
+
+System Integrity Protection: enabled
+
+Crashed Thread:        0  Dispatch queue: com.apple.main-thread
+
+Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
+Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000
+Exception Note:        EXC_CORPSE_NOTIFY
+
+Termination Signal:    Segmentation fault: 11
+Termination Reason:    Namespace SIGNAL, Code 0xb
+Terminating Process:   exc handler [21606]
+
+Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
+0   a.out                         	@foo@ foo + 16 (test.c:3)
+1   a.out                         	@bar@
+2   a.out                         	@main@ main + 20 (test.c:8)
+3   libdyld.dylib                 	0x1000000 start + 1
+
+Thread State
+  rax: 0x0000000000000000  rbx: 0x0000000000000000  rcx: 0x00007ffee42d81d0  rdx: 0x00007ffee42d8080
+  rdi: 0x0000000000000001  rsi: 0x00007ffee42d8070  rbp: 0x00007ffee42d8020  rsp: 0x00007ffee42d8020
+   r8: 0x0000000000000000   r9: 0x0000000000000000  r10: 0x0000000000000000  r11: 0x0000000000000000
+  r12: 0x0000000000000000  r13: 0x0000000000000000  r14: 0x0000000000000000  r15: 0x0000000000000000
+  rip: 0x000000010b92af70  rfl: 0x0000000000010202  cr2: 0x0000000000000000
+
+Logical CPU:     2
+Error Code:      0x00000006 (no mapping for user data write)
+Trap Number:     14
+
+
+Binary Images:
+       0x100000000 -        0x200000000 +a.out (0) <@UUID@> @EXEC@
+               0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ???

lldb/test/Shell/ScriptInterpreter/Python/Crashlog/altered_threadState.test

@@ -0,0 +1,13 @@
+# RUN: %clang_host -g %S/Inputs/test.c -o %t.out
+# RUN: cp %S/Inputs/altered_threadState.crash %t.crash
+# RUN: %python %S/patch-crashlog.py --binary %t.out --crashlog %t.crash --offsets '{"main":20, "bar":9, "foo":16}'
+# RUN: %lldb %t.out -o 'command script import lldb.macosx.crashlog' -o 'crashlog %t.crash' 2>&1 | FileCheck %s
+
+# CHECK: "crashlog" {{.*}} commands have been installed, use the "--help" options on these commands
+
+# CHECK: Thread[0] EXC_BAD_ACCESS (SIGSEGV) (KERN_INVALID_ADDRESS at 0x0000000000000000)
+# CHECK: [  0] {{.*}}out`foo + 16 at test.c
+# CHECK: [  1] {{.*}}out`bar + 8 at test.c
+# CHECK: [  2] {{.*}}out`main + 19 at test.c
+# CHECK: [  3] 0x{{[0]+}}1000000 start + 1
+# CHECK: rbp = 0x00007ffee42d8020