diff options
Diffstat (limited to 'source/Symbol')
| -rw-r--r-- | source/Symbol/UnwindPlan.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/source/Symbol/UnwindPlan.cpp b/source/Symbol/UnwindPlan.cpp index c089a7bb8db8..19edea4cb234 100644 --- a/source/Symbol/UnwindPlan.cpp +++ b/source/Symbol/UnwindPlan.cpp @@ -10,6 +10,7 @@ #include "lldb/Symbol/UnwindPlan.h" #include "lldb/Core/ConstString.h" +#include "lldb/Core/Log.h" #include "lldb/Target/Process.h" #include "lldb/Target/RegisterContext.h" #include "lldb/Target/Thread.h" @@ -373,6 +374,25 @@ UnwindPlan::SetPlanValidAddressRange (const AddressRange& range) bool UnwindPlan::PlanValidAtAddress (Address addr) { + // If this UnwindPlan has no rows, it is an invalid UnwindPlan. + if (GetRowCount() == 0) + { + Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_UNWIND)); + if (log) + log->Printf ("Testing if UnwindPlan is valid at pc 0x%" PRIx64 ": No unwind rows - is invalid."); + return false; + } + + // If the 0th Row of unwind instructions is missing, or if it doesn't provide + // a register to use to find the Canonical Frame Address, this is not a valid UnwindPlan. + if (GetRowAtIndex(0).get() == NULL || GetRowAtIndex(0)->GetCFARegister() == LLDB_INVALID_REGNUM) + { + Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_UNWIND)); + if (log) + log->Printf ("Testing if UnwindPlan is valid at pc 0x%" PRIx64 ": No CFA register - is invalid."); + return false; + } + if (!m_plan_valid_address_range.GetBaseAddress().IsValid() || m_plan_valid_address_range.GetByteSize() == 0) return true; |