[lldb-dev] Debugging a running process with lldb
mg11 at csr.com
Wed May 14 03:22:47 PDT 2014
I've read http://lldb.llvm.org/tutorial.html in more depth now ;-)
(appreciating that the debugger and the inferior require separate stdins.)
I see there's an option, "--no-stdin", proposing to mitigate the issue I
"If you attach to a process, or launch a process with the "|--no-stdin|"
option, the command interpreter is always available to enter commands.
This might be a little disconcerting to gdb users when always have an
|(lldb)| prompt. This allows you to set a breakpoint, etc without having
to explicitly interrupt the program you are debugging:
|(lldb) process continue
(lldb) breakpoint set --name stop_here |
However, it seems that --no-stdin is not present as a "process launch"
option anymore, but rather we have "--no-stdio". (Perhaps a typo,
somewhere?). I tried this option:
(lldb) process launch -s --no-stdio
Process 2344 launching
Process 2344 launched: './forever' (x86_64)
Process 2344 stopped
* thread #1: tid = 2344, 0x0000003675a011f0, name = 'forever', stop
reason = trace
frame #0: 0x0000003675a011f0
-> 0x3675a011f0: movq %rsp, %rdi
0x3675a011f3: callq 0x3675a046e0
0x3675a011f8: movq %rax, %r12
0x3675a011fb: movl 0x21eb97(%rip), %eax
(lldb) process continue
Process 2344 resuming
The interpreter prompt still fails to appear, so I still think I'm
either seeing a bug, or that the documentation is incomplete as to
describing how to run lldb such that the command interpreter, is always
available when the inferior is running.
Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom
More information can be found at www.csr.com. Keep up to date with CSR on our technical blog, www.csr.com/blog, CSR people blog, www.csr.com/people, YouTube, www.youtube.com/user/CSRplc, Facebook, www.facebook.com/pages/CSR/191038434253534, or follow us on Twitter at www.twitter.com/CSR_plc.
New for 2014, you can now access the wide range of products powered by aptX at www.aptx.com.
More information about the lldb-dev