[lldb-dev] Infinite recursion in IRForTarget::RegisterFunctionMetadata

[Ed Maste]

Hi Todd,

Do you have r203475 (aka git 7d55d82)?  I updated LLDB for an LLVM API
change and only had half of the change at first, until that rev.

-Ed


On 10 March 2014 15:32, Todd Fiala <tfiala at google.com> wrote:

> Hey all,
>
> Anybody else seeing these?  I've got a bunch of tests failing with a few
> (!) of these in the call stack:
>
> (frames below repeat tens of thousands of times)
>
> *#45756 *0x00007fa60f00ea5a in IRForTarget::RegisterFunctionMetadata
> (this=0x7fff0096f0a0, context=...,
>     function_ptr=0x20a45d0, name=0x7fa5f47a0560 "_ZL6printfPKcz")
>     at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Expression/IRForTarget.cpp:315
> *#45757* 0x00007fa60f00ea5a in IRForTarget::RegisterFunctionMetadata
> (this=0x7fff0096f0a0, context=...,
>     function_ptr=0x20a45d0, name=0x7fa5f47a0560 "_ZL6printfPKcz")
>     at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Expression/IRForTarget.cpp:315
> ...
>
> (here is what drives it)
>
> #47524 0x00007fa60f017183 in IRForTarget::runOnModule
> (this=0x7fff0096f0a0, llvm_module=...)
>     at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Expression/IRForTarget.cpp:2722
> #47525 0x00007fa60f00a579 in
> lldb_private::ClangExpressionParser::PrepareForExecution
> (this=0x7fff0096f2f0,
>     func_addr=@0x1ff0208: 18446744073709551615, func_end=@0x1ff0210:
> 18446744073709551615,
> execution_unit_ap=std::unique_ptr<lldb_private::IRExecutionUnit> containing
> 0x0, exe_ctx=...,
>     can_interpret=@0x1ff02a8: false,
> execution_policy=lldb_private::eExecutionPolicyOnlyWhenNeeded)
>     at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Expression/ClangExpressionParser.cpp:517
> #47526 0x00007fa60efd21c0 in lldb_private::ClangUserExpression::Parse
> (this=0x1ff01f0, error_stream=..., exe_ctx=...,
>     execution_policy=lldb_private::eExecutionPolicyOnlyWhenNeeded,
> keep_result_in_memory=true)
>     at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Expression/ClangUserExpression.cpp:539
> #47527 0x00007fa60efd3aac in lldb_private::ClangUserExpression::Evaluate
> (exe_ctx=..., options=..., expr_cstr=0x1f70a08 "(int)
> printf(\"\\x68\\x65\\x6c\\x6c\\x6f\\n\")", expr_prefix=0x0,
> result_valobj_sp=..., error=...) at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Expression/ClangUserExpression.cpp:969
> #47528 0x00007fa60ece67e4 in lldb_private::Target::EvaluateExpression
> (this=0x1e61100,
>     expr_cstr=0x1f70a08 "(int) printf(\"\\x68\\x65\\x6c\\x6c\\x6f\\n\")",
> frame=0x7fa5f4001e40, result_valobj_sp=...,
>     options=...) at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Target/Target.cpp:1910
> #47529 0x00007fa60ef07d14 in
> lldb_private::CommandObjectExpression::EvaluateExpression (this=0x191d860,
>     expr=0x1f70a08 "(int) printf(\"\\x68\\x65\\x6c\\x6c\\x6f\\n\")",
> output_stream=0x1df8e70, error_stream=0x1df8ec8,
>     result=0x1df8e70) at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Commands/CommandObjectExpression.cpp:301
> *#47530* 0x00007fa60ef0864a in
> lldb_private::CommandObjectExpression::DoExecute (this=0x191d860,
>     command=0x1f70a08 "(int) printf(\"\\x68\\x65\\x6c\\x6c\\x6f\\n\")",
> result=...)
>     at
> /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Commands/CommandObjectExpression.cpp:485
> --
> Todd Fiala | Software Engineer |  tfiala at google.com |  650-943-3180
>
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>
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