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Added TODO.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39202 a95241bf-73f2-0310-859d-f6bbb57e9c96
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Ingo Weinhold 2010-10-30 11:45:04 +00:00
parent 13b81a3b8e
commit 0a5b0dae01
1 changed files with 11 additions and 1 deletions
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12
src/apps/debugger/ThreadHandler.cpp
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@ -263,10 +263,20 @@ ThreadHandler::HandleThreadAction(uint32 action)
TRACE_CONTROL(" ip: %#llx\n", frame->InstructionPointer());
// When the thread is in a syscall, do the same for all step kinds: Stop it
// when it return by means of a breakpoint.
// when it returns by means of a breakpoint.
if (frame->Type() == STACK_FRAME_TYPE_SYSCALL) {
// set a breakpoint at the CPU state's instruction pointer (points to
// the return address, unlike the stack frame's instruction pointer)
// TODO: This is doesn't work correctly anymore. When stepping over a "syscall"
// instruction the thread is stopped twice. The after the first step the PC is
// incorrectly shown at the "syscall" instruction. Then we step again and are
// stopped at the temporary breakpoint after the "syscall" instruction. There
// are two problems. The first one is that we don't (cannot?) discriminate
// between the thread being in a syscall (like in a blocking syscall) and the
// thread having been stopped (or singled-stepped) at the end of the syscall.
// The second issue is that the temporary breakpoint is probably not necessary
// anymore, since single-stepping over "syscall" instructions should just work
// as expected.
status_t error = _InstallTemporaryBreakpoint(
frame->GetCpuState()->InstructionPointer());
if (error != B_OK) {