Disassembler::DisassembleRange() currently calls Target::ReadMemory

with prefer_file_cache == false.  This is what we want to do when
the user is doing a disassemble command -- show the actual memory
contents in case the memory has been corrupted or something -- but
when we're profiling functions for stepping or unwinding
(ThreadPlanStepRange::GetInstructionsForAddress,
UnwindAssemblyInstEmulation::GetNonCallSiteUnwindP) we can read
__TEXT instructions directly out of the file, if it exists.
<rdar://problem/14397491> 

llvm-svn: 190638

1 files changed, 3 insertions, 1 deletions

diff --git a/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp b/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp
index c93dea9b5d3..8ddc1cd2ee8 100644
--- a/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp
+++ b/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp
@@ -53,11 +53,13 @@ UnwindAssemblyInstEmulation::GetNonCallSiteUnwindPlanFromAssembly (AddressRange&
         
         ExecutionContext exe_ctx;
         thread.CalculateExecutionContext(exe_ctx);
+        const bool prefer_file_cache = true;
         DisassemblerSP disasm_sp (Disassembler::DisassembleRange (m_arch,
                                                                   NULL,
                                                                   NULL,
                                                                   exe_ctx,
-                                                                  range));
+                                                                  range,
+                                                                  prefer_file_cache));
         
         Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_UNWIND));