| Issue |
177570
|
| Summary |
"help breakpoint set" crashes lldb if the terminal is exactly 105 columns wide
|
| Labels |
lldb
|
| Assignees |
|
| Reporter |
DavidSpickett
|
LLDB built from main 4e51f9044f17a00f5c6c0f5b2abf1fdb9b8d9eeb. Using Ubuntu Ubuntu 22.04.5 LTS's default terminal.
When the width is exactly 105 columns, this crashes:
```
$ ./bin/lldb -o "help breakpoint set"
(lldb) help breakpoint set
lldb: /home/davspi01/llvm-project/lldb/source/Interpreter/Options.cpp:320: void lldb_private::Options::Ou
tputFormattedUsageText(lldb_private::Stream &, const lldb_private::OptionDefinition &, uint32_t, bool): A
ssertion `start < final_end' failed.
LLDB diagnostics will be written to /tmp/diagnostics-afa476
Please include the directory content when filing a bug report
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrac
e.
Stack dump:
0. Program arguments: ./bin/lldb -o "help breakpoint set"
#0 0x0000bc5c233e43ac llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (./bin/lldb+0x743ac)
#1 0x0000bc5c233e21fc llvm::sys::RunSignalHandlers() (./bin/lldb+0x721fc)
#2 0x0000bc5c233e5170 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x0000f47b7d49f8f8 (linux-vdso.so.1+0x8f8)
#4 0x0000f47b71405b68 syscall ./misc/../sysdeps/unix/sysv/linux/aarch64/syscall.S:39:0
#5 0x0000f47b77e373ec SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#6 0x0000f47b7d49f8f8 (linux-vdso.so.1+0x8f8)
#7 0x0000f47b713a2008 __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#8 0x0000f47b7135a83c gsignal ./signal/../sysdeps/posix/raise.c:27:6
#9 0x0000f47b71347134 abort ./stdlib/abort.c:81:7
#10 0x0000f47b71354114 __assert_fail_base ./assert/assert.c:91:7
#11 0x0000f47b7135418c (/lib/aarch64-linux-gnu/libc.so.6+0x3418c)
#12 0x0000f47b777450e8 lldb_private::Options::OutputFormattedUsageText(lldb_private::Stream&, lldb_privat
e::OptionDefinition const&, unsigned int, bool) Options.cpp:0:0
#13 0x0000f47b77745a24 lldb_private::Options::GenerateOptionUsage(lldb_private::Stream&, lldb_private::Co
mmandObject&, unsigned int, bool) Options.cpp:0:0
#14 0x0000f47b7772bb5c lldb_private::CommandObject::GenerateHelpText(lldb_private::Stream&) CommandObject
.cpp:0:0
#15 0x0000f47b7772b8ec lldb_private::CommandObject::GenerateHelpText(lldb_private::CommandReturnObject&)
CommandObject.cpp:0:0
#16 0x0000f47b7ab11e0c lldb_private::CommandObjectHelp::DoExecute(lldb_private::Args&, lldb_private::Comm
andReturnObject&) CommandObjectHelp.cpp:0:0
#17 0x0000f47b7772c468 lldb_private::CommandObjectParsed::Execute(char const*, lldb_private::CommandRetur
nObject&) CommandObject.cpp:0:0
#18 0x0000f47b7771af58 lldb_private::CommandInterpreter::HandleCommand(char const*, lldb_private::LazyBoo
l, lldb_private::CommandReturnObject&, bool) CommandInterpreter.cpp:0:0
#19 0x0000f47b7771fdb4 lldb_private::CommandInterpreter::IOHandlerInputComplete(lldb_private::IOHandler&,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>&) CommandInterpreter.cpp:
0:0
#20 0x0000f47b7763a608 lldb_private::IOHandlerEditline::Run() IOHandler.cpp:0:0
#21 0x0000f47b7760c42c lldb_private::Debugger::RunIOHandlers() Debugger.cpp:0:0
#22 0x0000f47b77721a30 lldb_private::CommandInterpreter::RunCommandInterpreter(lldb_private::CommandInter
preterRunOptions&) CommandInterpreter.cpp:0:0
#23 0x0000f47b773ddfac lldb::SBDebugger::RunCommandInterpreter(lldb::SBCommandInterpreterRunOptions const
&) (/home/davspi01/build-llvm-aarch64/bin/../lib/liblldb.so.23.0git+0x595dfac)
#24 0x0000bc5c233b2efc Driver::MainLoop() (./bin/lldb+0x42efc)
#25 0x0000bc5c233b3d98 main (./bin/lldb+0x43d98)
#26 0x0000f47b71347400 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#27 0x0000f47b713474d8 call_init ./csu/../csu/libc-start.c:128:20
#28 0x0000f47b713474d8 __libc_start_main ./csu/../csu/libc-start.c:379:5
#29 0x0000bc5c233b03b0 _start (./bin/lldb+0x403b0)
Aborted (core dumped)
```
When the width is not 105, it works.
```
$ tput cols
106
davspi01@AWS-ARMVM:~/build-llvm-aarch64$ ./bin/lldb -o "help breakpoint set"
Sets a breakpoint or set of breakpoints in the executable.
Syntax: breakpoint set <cmd-options>
<...>
```
The height of the console does not seem to matter. Which makes sense as the failing assert is in code that tries to break the output into multiple lines.
I wonder if the addition of ANSI codes to underline the shortcut characters has thrown off the width calculations.
![]()
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