Improve Elf object file UUID calculation performance.
This change makes significant improvements in the performance of
calculating a UUID within ObjectFileELF, and handles both running
processes and core files correctly. This does lazy evaluation of
UUID generation and caches the result when calculated.
Change by Piotr Rak.
llvm-svn: 204749
diff --git a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.h b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.h
index 44b40a4..ac7d38c 100644
--- a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.h
+++ b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.h
@@ -214,6 +214,7 @@
/// Version of this reader common to all plugins based on this class.
static const uint32_t m_plugin_version = 1;
+ static const uint32_t g_core_uuid_magic;
/// ELF file header.
elf::ELFHeader m_header;
@@ -249,6 +250,17 @@
size_t
SectionIndex(const SectionHeaderCollConstIter &I) const;
+ // Parses the ELF program headers.
+ static size_t
+ GetProgramHeaderInfo(ProgramHeaderColl &program_headers,
+ lldb_private::DataExtractor &data,
+ const elf::ELFHeader &header);
+
+ // Finds PT_NOTE segments and calculates their crc sum.
+ static uint32_t
+ CalculateELFNotesSegmentsCRC32(const ProgramHeaderColl& program_headers,
+ lldb_private::DataExtractor &data);
+
/// Parses all section headers present in this object file and populates
/// m_program_headers. This method will compute the header list only once.
/// Returns the number of headers parsed.