gdb.Value syntax issue

[CatCodeMe]

你好，我在使用您这个printer脚本时，有个问题 问题如图

.gdbinit 配置， 我把printer.py clone到本地了

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补充 https://github.com/ClickHouse/ClickHouse/issues/18861 这个issue里提到的这几种printer都尝试过了。都不太行

1. llvm 版本的printer , 不知道为什么没注册上

   • 在 gdb 环境下，info pretty-print 没有显示注册成功的可用类型，比如std::basic_string等

2. libcxx-pretty-printers 也有OOM的问题

3. 您这个版本的因为语法错误，我还没成功

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我这里的环境是clion(win10) + wsl2(clickhouse), 期望在使用remote-gdb-server的时候，可以在debug界面看到每个变量的具体的值， 现在还是这种

[hexiaoting]

Install gdb and verify that it supports Python scripting (invoke gdb --version and check for --with-python=... lines). 我的gdb版本是9.2，你的是多少？另外gdb有--with-python路径吗？

[CatCodeMe]

sorry , not this repository... it works

[hexiaoting]

好。用起来有什么问题，再留言

[CatCodeMe]

好。用起来有什么问题，再留言

我的也是gdb 9.2，目前看还有一些警告，没其他问题

[CatCodeMe]

没有--with-python

[hexiaoting]

没有--with-python 那你info pretty-printer显示注册成功了吗？ 或者你随便打印一个AST，看看成功了吗？有没有显示sql内容。

[CatCodeMe]

没有--with-python 那你info pretty-printer显示注册成功了吗？ 或者你随便打印一个AST，看看成功了吗？有没有显示sql内容。

1. info pretty-printer 注册成功了
2. demo，

[CatCodeMe]

还有2个问题

1. ast，我使用 p *ast 有错误

• clickhouse 版本为 v21.9.2.17-stable （master分支手动编译的）
• 这段代码在executeQuery.cpp:934

gdb) p *ast
$2 = [New Thread 32123.1442]
[Switching to Thread 32123.32357]
warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'
warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'

Thread 2 "TCPHandler" hit Breakpoint 16, DB::executeQueryImpl (begin=0x7fff080137b0 "SELECT message FROM system.warnings", end=0x7fff080137d3 "", context=warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'
warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'
std::shared_ptr<DB::Context> count 3, weak 4 containing = {...}, internal=false, stage=DB::QueryProcessingStage::Complete, has_query_tail=false, istr=0x0) at ../src/Interpreters/executeQuery.cpp:414
414	                const auto * last_select = select_with_union_query->list_of_selects->children.back()->as<ASTSelectQuery>();
Traceback (most recent call last):
  File "/home/hulj/workspace/ClickHouse-pretty-printer/clickhouse/IAST.py", line 15, in to_string
    sql_string=gdb.parse_and_eval(eval_string);
gdb.error: The program stopped in another thread while making a function call from GDB.
Evaluation of the expression containing the function
(DB::serializeAST(DB::IAST const&, bool)) will be abandoned.
When the function is done executing, GDB will silently stop.

[Switching to thread 2 (Thread 32123.32357)]
#0  DB::executeQueryImpl (begin=0x7fff080137b0 "SELECT message FROM system.warnings", end=0x7fff080137d3 "", context=warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'
warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'
std::shared_ptr<DB::Context> count 3, weak 4 containing = {...}, internal=false, stage=DB::QueryProcessingStage::Complete, has_query_tail=false, istr=0x0) at ../src/Interpreters/executeQuery.cpp:414
414	                const auto * last_select = select_with_union_query->list_of_selects->children.back()->as<ASTSelectQuery>();
warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'
warning: RTTI symbol not found for class 'std::__1::__shared_ptr_pointer<DB::Context*, std::__1::shared_ptr<DB::Context>::__shared_ptr_default_delete<DB::Context, DB::Context>, std::__1::allocator<DB::Context> >'

2. 按照readme的说明（Gdb useful commands related），没有能实现info vtbl ast的效果

[hexiaoting]

p ast能成功吗？ast是什么类型？