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LibDebug: Make sure current_breakpoint has value before usage

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Previously this caused a crash when no breakpoint was active since we
tried to get value().address before the has_value() check.
This commit is contained in:
Marcus Nilsson 2022-07-02 20:23:19 +02:00 • committed by Brian Gianforcaro
parent 643faa1144
commit da8eea69e4
1 changed files with 23 additions and 21 deletions
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6
Userland/Libraries/LibDebug/DebugSession.h
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@ -278,9 +278,10 @@ void DebugSession::run(DesiredInitialDebugeeState initial_debugee_state, Callbac
bool did_single_step = false;
auto current_breakpoint_address = bit_cast<FlatPtr>(current_breakpoint.value().address);
// Re-enable the breakpoint if it wasn't removed by the user
if (current_breakpoint.has_value() && m_breakpoints.contains(current_breakpoint_address)) {
if (current_breakpoint.has_value()) {
auto current_breakpoint_address = bit_cast<FlatPtr>(current_breakpoint.value().address);
if (m_breakpoints.contains(current_breakpoint_address)) {
// The current breakpoint was removed to make it transparent to the user.
// We now want to re-enable it - the code execution flow could hit it again.
// To re-enable the breakpoint, we first perform a single step and execute the
@ -303,6 +304,7 @@ void DebugSession::run(DesiredInitialDebugeeState initial_debugee_state, Callbac
state = State::ConsecutiveBreakpoint;
}
}
}
if (decision == DebugDecision::SingleStep) {
state = State::SingleStep;