[Lldb-commits] [lldb] 61cf9f4 - [ObjectFilePECOFF] Try to avoid unaligned access.

[Davide Italiano via lldb-commits]

Author: Davide Italiano
Date: 2020-07-14T18:53:23-07:00
New Revision: 61cf9f4e723bd9522757931706b208a1357c30ba

URL: https://github.com/llvm/llvm-project/commit/61cf9f4e723bd9522757931706b208a1357c30ba
DIFF: https://github.com/llvm/llvm-project/commit/61cf9f4e723bd9522757931706b208a1357c30ba.diff

LOG: [ObjectFilePECOFF] Try to avoid unaligned access.

Fixes an UBSAN error.

Added: 
    

Modified: 
    lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp

Removed: 
    


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diff  --git a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
index 39808cdec790..d606b49130c4 100644
--- a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
+++ b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
@@ -656,7 +656,7 @@ Symtab *ObjectFilePECOFF::GetSymtab() {
           // because it is used as offset 0 to encode a NULL string.
           uint32_t *strtab_data_start = const_cast<uint32_t *>(
               reinterpret_cast<const uint32_t *>(strtab_data.GetDataStart()));
-          strtab_data_start[0] = 0;
+          ::memset(&strtab_data_start[0], 0, sizeof(uint32_t));
 
           offset = 0;
           std::string symbol_name;