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<rdar://problem/13590152>

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Providing a dummy RegisterContext to secure against faulty Python OS plugins that do not return a valid RegisterContext
The RegisterContextDummy exports a PC with a constant 0xFFFFFFFFFFFFFFFF value

llvm-svn: 180033
This commit is contained in:
Enrico Granata
2013-04-22 18:26:52 +00:00
parent 2ec1b100a4
commit cbd79b6c84
4 changed files with 230 additions and 0 deletions
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8
lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp
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@@ -33,6 +33,7 @@
#include "lldb/Target/ThreadList.h"
#include "lldb/Target/Thread.h"
#include "Plugins/Process/Utility/DynamicRegisterInfo.h"
#include "Plugins/Process/Utility/RegisterContextDummy.h"
#include "Plugins/Process/Utility/RegisterContextMemory.h"
#include "Plugins/Process/Utility/ThreadMemory.h"
@@ -333,6 +334,13 @@ OperatingSystemPython::CreateRegisterContextForThread (Thread *thread, addr_t re
}
}
}
// if we still have no register data, fallback on a dummy context to avoid crashing
if (!reg_ctx_sp)
{
if (log)
log->Printf ("OperatingSystemPython::CreateRegisterContextForThread (tid = 0x%" PRIx64 ") forcing a dummy register context", thread->GetID());
reg_ctx_sp.reset(new RegisterContextDummy(*thread,0,target.GetArchitecture().GetAddressByteSize()));
}
return reg_ctx_sp;
}