Xcode 12.4 Instruments的Time Profiler启动即崩溃问题咨询

问题背景 #

使用Xcode 12.4内置的Instruments工具时出现异常：Allocations工具可正常运行，但Time Profiler选中启动就会立即崩溃，以下排查方案均无效：

• 专门针对Instruments调试场景启动应用
• 选择附加到已启动的应用进程，而非直接通过Instruments启动应用
• 先成功启动Allocations工具，再在Instruments界面点击「+」按钮选择Time Profiler，仍触发相同崩溃
• 分别切换Debug、Release两种构建配置重试
• 清空项目构建目录后，重试上述所有操作

崩溃日志 #

Crashed Thread:        3  Dispatch queue: com.apple.dt.frame.activity

Exception Type:        EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes:       0x0000000000000001, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Illegal instruction: 4
Termination Reason:    Namespace SIGNAL, Code 0x4
Terminating Process:   exc handler [13064]

// ...

Thread 3 Crashed:: Dispatch queue: com.apple.dt.frame.activity
0   com.apple.dt.InstrumentsAnalysisCore    0x00000001082497f3 std::__1::__hash_iterator<std::__1::__hash_node<void*, void*>*> std::__1::__hash_table<void*, std::__1::hash<void*>, std::__1::equal_to<void*>, std::__1::allocator<void*> >::find<void*>(void* const&) + 83
1   com.apple.dt.InstrumentsAnalysisCore    0x0000000108249044 XRCLIPS::_delegateCallbackRouter(environmentData*, udfContext*, udfValue*) + 628
2   com.apple.dt.InstrumentsAnalysisCore    0x00000001083018a0 EvaluateExpression + 464
3   com.apple.dt.InstrumentsAnalysisCore    0x00000001083069a8 PutProcBind + 216
4   com.apple.dt.InstrumentsAnalysisCore    0x0000000108301a89 EvaluateExpression + 953
5   com.apple.dt.InstrumentsAnalysisCore    0x00000001081e61ab PrognFunction + 75
6   com.apple.dt.InstrumentsAnalysisCore    0x00000001083018a0 EvaluateExpression + 464
7   com.apple.dt.InstrumentsAnalysisCore    0x000000010830887c EvaluateProcActions + 604
8   com.apple.dt.InstrumentsAnalysisCore    0x000000010832b357 Run + 2327
9   com.apple.dt.InstrumentsAnalysisCore    0x000000010832c312 RunCommand + 130
10  com.apple.dt.InstrumentsAnalysisCore    0x00000001083018a0 EvaluateExpression + 464
11  com.apple.dt.InstrumentsAnalysisCore    0x00000001081e61ab PrognFunction + 75
12  com.apple.dt.InstrumentsAnalysisCore    0x00000001083018a0 EvaluateExpression + 464
13  com.apple.dt.InstrumentsAnalysisCore    0x000000010830887c EvaluateProcActions + 604
14  com.apple.dt.InstrumentsAnalysisCore    0x00000001081f4cc7 CallDeffunction + 391
15  com.apple.dt.InstrumentsAnalysisCore    0x000000010831df17 EvaluateDeffunctionCall + 39
16  com.apple.dt.InstrumentsAnalysisCore    0x0000000108301a89 EvaluateExpression + 953
17  com.apple.dt.InstrumentsAnalysisCore    0x00000001082b0478 RouteCommand + 1128
18  com.apple.dt.InstrumentsAnalysisCore    0x000000010824acdc invocation function for block in XRCLIPS::executeCommand(NSString*, NSString*) + 684
19  com.apple.dt.InstrumentsAnalysisCore    0x000000010824a7c3 _runInCLocale(void () block_pointer) + 51
20  com.apple.dt.InstrumentsAnalysisCore    0x000000010824a9dc XRCLIPS::executeCommand(NSString*, NSString*) + 124
21  com.apple.dt.InstrumentsAnalysisCore    0x00000001082c369d -[XRAnalysisCoreBindingHemisphere solveBindingProblem] + 109
22  com.apple.dt.instruments.InstrumentsPlugIn  0x00000001087c6835 -[XRAnalysisCoreSetupAgent _solveBindingProblem:] + 130
23  com.apple.dt.instruments.InstrumentsPlugIn  0x00000001087c5b8c -[XRAnalysisCoreSetupAgent executeStopOnItinerary:] + 695
24  com.apple.dt.instruments.DVTInstrumentsUtilities    0x0000000107fa40e4 -[XRMobileAgent(XRMobileAgentStop) hello] + 272
25  com.apple.dt.instruments.DVTInstrumentsUtilities    0x0000000107fa041d __51-[XRFrameActivityManager _reevaluateArrivingAgent:]_block_invoke + 112
26  com.apple.dt.instruments.DVTInstrumentsUtilities    0x0000000107fa7fc3 xray::scheduler::ActivityManager::_processActivity(void*) + 115
27  libdispatch.dylib               0x00007fff67acf658 _dispatch_client_callout + 8
28  libdispatch.dylib               0x00007fff67ad4c44 _dispatch_lane_serial_drain + 597
29  libdispatch.dylib               0x00007fff67ad55d6 _dispatch_lane_invoke + 363
30  libdispatch.dylib               0x00007fff67adec09 _dispatch_workloop_worker_thread + 596
31  libsystem_pthread.dylib         0x00007fff67d2da3d _pthread_wqthread + 290
32  libsystem_pthread.dylib         0x00007fff67d2cb77 start_wqthread + 15

// ...

Thread 3 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000007fb2  rbx: 0x0000000000000004  rcx: 0x8ddf04fbc068655b  rdx: 0x1124171e0a32926b
  rdi: 0x00007fb2984d6258  rsi: 0x00007fb29ca7f7a0  rbp: 0x00007000011afe70  rsp: 0x00007000011afe70
   r8: 0x9ddfea08eb382d69   r9: 0x0000000000000002  r10: 0x00007fff85335500  r11: 0x00007fff2d9e6128
  r12: 0x00007fb299af8460  r13: 0x00007000011aff30  r14: 0x0000000000000004  r15: 0x00007fff6697dca0
  rip: 0x00000001082497f3  rfl: 0x0000000000010a03  cr2: 0x00000001081f1a10
  
Logical CPU:     1
Error Code:      0x00000000
Trap Number:     6

// ...

VM Region Summary:
ReadOnly portion of Libraries: Total=828.9M resident=0K(0%) swapped_out_or_unallocated=828.9M(100%)
Writable regions: Total=100.2M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=100.2M(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Accelerate framework               384K        3 
Activity Tracing                   256K        1 
CG backing stores                  224K        2 
CG image                           116K       18 
CG raster data                     216K       11 
CoreAnimation                     7068K       56 
CoreGraphics                         8K        1 
CoreImage                           20K        5 
CoreUI image data                 1296K       18 
Dispatch continuations            4096K        1 
Foundation                           4K        1 
IOKit                             7940K        1 
Kernel Alloc Once                    8K        1 
MALLOC                            70.3M      113 
MALLOC guard page                   32K        8 
OpenGL GLSL                        256K        3 
STACK GUARD                       56.1M       14 
Stack                             14.6M       14 
VM_ALLOCATE                        368K       21 
VM_ALLOCATE (reserved)            2048K        2         reserved VM address space (unallocated)
__DATA                            77.0M      576 
__DATA_CONST                      1957K       73 
__FONT_DATA                          4K        1 
__GLSLBUILTINS                    5176K        1 
__LINKEDIT                       409.5M      118 
__OBJC_RO                         32.3M        1 
__OBJC_RW                         1908K        2 
__TEXT                           419.8M      548 
__UNICODE                          564K        1 
mapped file                      132.1M       42 
shared memory                      632K       14 
===========                     =======  ======= 
TOTAL                              1.2G     1671 
TOTAL, minus reserved VM space     1.2G     1671 

环境与设备信息 #

Process:               Instruments [13064]
Path:                  /Applications/Xcode_12.4.app/Contents/Applications/Instruments.app/Contents/MacOS/Instruments
Identifier:            com.apple.dt.Instruments
Instruments Version:   12.4 (64543.2)
Build Info:            Instruments-64543002000000000~11 (12D4e)
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Instruments [13064]
User ID:               502

Date/Time:             2021-10-03 16:02:23.335 +0430
OS Version:            Mac OS X 10.15.7 (19H2)
Report Version:        12
Anonymous UUID:        3AB66FC9-BBB6-ACB0-2877-9239C69E7BC1

Sleep/Wake UUID:       D2B09D01-75C0-4596-810A-69604C2B70E3

Time Awake Since Boot: 19000 seconds
Time Since Wake:       19000 seconds

System Integrity Protection: disabled

// ...

Model: MacBookPro7,1, BootROM 68.0.0.0.0, 2 processors, Intel Core 2 Duo, 2.4 GHz, 4 GB, SMC 1.62f7
Graphics: kHW_NVidiaGeForce320MItem, NVIDIA GeForce 320M, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533654465238432D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533654465238432D47372020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8D), Broadcom BCM43xx 1.0 (5.106.98.102.31)
Bluetooth: Version 7.0.6f7, 3 services, 25 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Network Service: iPhone, Ethernet, en3
Serial ATA Device: TOSHIBA MK2555GSXF, 250.06 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: USB Bus
USB Device: USB Bus
USB Device: BRCM2046 Hub
USB Device: Bluetooth USB Host Controller
USB Device: IR Receiver
USB Device: Apple Internal Keyboard / Trackpad
USB Device: USB 2.0 Bus
USB Device: Built-in iSight
USB Device: SAMSUNG_Android
USB Device: USB 2.0 Bus
USB Device: iPhone
USB Device: Internal Memory Card Reader
Thunderbolt Bus: 

修复方案 #

从崩溃栈可判定故障出在Instruments核心分析组件的内部逻辑错误，结合运行环境，可按以下顺序尝试修复：

• 重置Instruments偏好设置：完全关闭Instruments后，在终端执行 defaults delete com.apple.dt.Instruments 清除所有自定义配置，重启Instruments后重试
• 深度清理Xcode缓存：删除~/Library/Developer/Xcode/DerivedData下的全部内容，同时删除~/Library/Caches/com.apple.dt.Instruments目录，再重启设备重试
• 调整启动路径：不通过Xcode入口打开Instruments，直接从启动台独立启动Instruments，手动选择Time Profiler模板后再关联目标应用进程
• 改用命令行采集：如果图形界面仍崩溃，可使用xctrace命令行工具完成性能采集，示例命令：xctrace record --template 'Time Profiler' --launch <你的应用本地路径>
• 兼容适配调整：当前设备SIP处于关闭状态，老版本Xcode的Instruments在SIP关闭的Catalina系统上存在已知兼容问题，可临时开启SIP后重试，或升级至Xcode 12.5及以上版本。

内容的提问来源于stack exchange，提问作者Top-Master