[all-commits] [llvm/llvm-project] 0d7401: [lldb/api] Add checks for StackFrame::GetRegisterC...

[Med Ismail Bennani via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 0d7401cf9d5cc0db3de9a8ddb8ea2362d5412d2f
      https://github.com/llvm/llvm-project/commit/0d7401cf9d5cc0db3de9a8ddb8ea2362d5412d2f
  Author: Med Ismail Bennani <medismail.bennani at gmail.com>
  Date:   2020-07-07 (Tue, 07 Jul 2020)

  Changed paths:
    M lldb/source/API/SBFrame.cpp

  Log Message:
  -----------
  [lldb/api] Add checks for StackFrame::GetRegisterContext calls (NFC)

This patch fixes a crash that is happening because of a null pointer
dereference in SBFrame.

StackFrame::GetRegisterContext says explicitly that you might not get
a valid RegisterContext back but the pointer wasn't tested before,
resulting in crashes. This should solve the issue.

rdar://54462095

Differential Revision: https://reviews.llvm.org/D83343

Signed-off-by: Med Ismail Bennani <medismail.bennani at gmail.com>