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[LLDB] Fix possible nullptr exception 

Some architectures do not have a flag register (like riscv).
In this case, we should set it to `baton.m_register_values.end()` to avoid nullptr exception.

Reviewed By: DavidSpickett

Differential Revision: https://reviews.llvm.org/D131945
This commit is contained in:
Emmmer 2022-08-16 15:35:38 +08:00
parent 1638ad1ebf
commit 95e2949a53
1 changed files with 4 additions and 2 deletions
lldb/source/Plugins/Process/Utility
NativeProcessSoftwareSingleStep.cpp

6
lldb/source/Plugins/Process/Utility/NativeProcessSoftwareSingleStep.cpp
View File

@ -128,8 +128,10 @@ Status NativeProcessSoftwareSingleStep::SetupSoftwareSingleStepping(
auto pc_it =
baton.m_register_values.find(reg_info_pc->kinds[eRegisterKindDWARF]);
auto flags_it =
baton.m_register_values.find(reg_info_flags->kinds[eRegisterKindDWARF]);
auto flags_it = reg_info_flags == nullptr
? baton.m_register_values.end()
: baton.m_register_values.find(
reg_info_flags->kinds[eRegisterKindDWARF]);
lldb::addr_t next_pc;
lldb::addr_t next_flags;