<rdar://problem/12897838>

Making sure we do not try to copy memory at address 0 - that would make us crash

llvm-svn: 176438

diff --git a/lldb/source/Symbol/ClangASTType.cpp b/lldb/source/Symbol/ClangASTType.cpp
index ba23939..1e83f1a 100644 (file)
--- a/lldb/source/Symbol/ClangASTType.cpp
+++ b/lldb/source/Symbol/ClangASTType.cpp
@@ -1734,6 +1734,8 @@ ClangASTType::ReadFromMemory
     {
         if (address_type == eAddressTypeHost)
         {
+            if (addr == 0)
+                return false;
             // The address is an address in this process, so just copy it
             memcpy (dst, (uint8_t*)NULL + addr, byte_size);
             return true;

diff --git a/lldb/source/Symbol/Type.cpp b/lldb/source/Symbol/Type.cpp
index 03fc429..bdd7ce8 100644 (file)
--- a/lldb/source/Symbol/Type.cpp
+++ b/lldb/source/Symbol/Type.cpp
@@ -439,6 +439,8 @@ Type::ReadFromMemory (ExecutionContext *exe_ctx, lldb::addr_t addr, AddressType
         if (address_type == eAddressTypeHost)
         {
             // The address is an address in this process, so just copy it
+            if (addr == 0)
+                return false;
             memcpy (dst, (uint8_t*)NULL + addr, byte_size);
             return true;
         }