[lldb] provide memory show to show real memory with breakpoint · Pull Request !727 · OpenHarmony/third_party_llvm-project

### Issue
https://gitee.com/openharmony/third_party_llvm-project/issues/IB5YGV

### Reason (Purpose, Solved Problem)
The "memory show" command only shows memory with coverage with we tries to read the memory at the breakpoint address. This commit added uncovered real memory with breakpoint sign when use "memory show".

### Description

Implement both lldb and lldb-server codes and create interface between them to create and implement the command "memory show".

### Test (Local test)
(lldb) target create "test"
Current executable set to '/OpenHarmony/out/llvm_make/bin/test' (x86_64).
(lldb) b 7
Breakpoint 1: where = test`main + 15 at test.cpp:7:5, address = 0x00000000000011bf
(lldb) b 10
Breakpoint 2: where = test`main + 56 at test.cpp:10:5, address = 0x00000000000011e8
(lldb) r
Process 3278620 launched: '/OpenHarmony/out/llvm_make/bin/test' (x86_64)
Process 3278620 stopped
* thread #1, name = 'test', stop reason = breakpoint 1.1
    frame #0: 0x00005555555551bf test`main at test.cpp:7:5
   4    using namespace std;
   5    int main(){
   6   
-> 7    int a=0;
   8   
   9    cout<<"hello"<<endl;
   10   cout<<"world"<<endl;
(lldb) br list
Current breakpoints:
1: file = '/OpenHarmony/out/llvm-install/bin/test.cpp', line = 7, exact_match = 0, locations = 1, resolved = 1, hit count = 1
  1.1: where = test`main + 15 at test.cpp:7:5, address = 0x00005555555551bf, resolved, hit count = 1

2: file = '/OpenHarmony/out/llvm-install/bin/test.cpp', line = 10, exact_match = 0, locations = 1, resolved = 1, hit count = 0
  2.1: where = test`main + 56 at test.cpp:10:5, address = 0x00005555555551e8, resolved, hit count = 0

(lldb) memory show 0x00005555555551e8
0x5555555551e8: cc 8b 3d e9 2d 00 00 48 8d 35 14 0e 00 00 e8 45  ..=.-..H.5.....E
0x5555555551f8: fe ff ff 48 89 c7 48 8b 35 c3 2d 00 00 e8 46 fe  ...H..H.5.-...F.
(lldb) memory read 0x00005555555551e8
0x5555555551e8: 48 8b 3d e9 2d 00 00 48 8d 35 14 0e 00 00 e8 45  H.=.-..H.5.....E
0x5555555551f8: fe ff ff 48 89 c7 48 8b 35 c3 2d 00 00 e8 46 fe  ...H..H.5.-...F.
(lldb) breakpoint delete
About to delete all breakpoints, do you want to do that?: [Y/n] y
All breakpoints removed. (2 breakpoints)
(lldb) memory show 0x00005555555551e8
0x5555555551e8: 48 8b 3d e9 2d 00 00 48 8d 35 14 0e 00 00 e8 45  H.=.-..H.5.....E
0x5555555551f8: fe ff ff 48 89 c7 48 8b 35 c3 2d 00 00 e8 46 fe  ...H..H.5.-...F.
(lldb) q
Quitting LLDB will kill one or more processes. Do you really want to proceed: [Y/n] y
### Need to cherry-pick to release (eg：monthly_20221018, OpenHarmony-3.2-Beta5 ...) branch？

- [ ] yes，branch list:
- [x] no

why:

###  Compatibility impact assessment, please indicate (Y/N) 
N

类型	指派人员	状态
审查	@Eric 由 CODEOWNERS 文件第 1 行指派为审查者	进行中 (0/1人)
审查	hhj 已审查通过 Pavel Kosov	已完成 (1/1人)
测试	openharmony_ci public_ARKCIAccount	进行中 (0/1人)

OpenHarmony/third_party_llvm-project .gitee-modal { width: 500px !important; }

搜索帮助

OpenHarmony/third_party_llvm-project