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Fix for Bug 25338

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Summary:
The issue arises because LLDB is not
able to read the vdso library correctly.
The fix adds memory allocation callbacks
to allocate sufficient memory in case the
requested offsets don't fit in the memory
buffer allocated for the ELF.

Reviewers: lldb-commits, clayborg, deepak2427, ovyalov, labath, tberghammer

Differential Revision: http://reviews.llvm.org/D16107

llvm-svn: 258122
This commit is contained in:
Ravitheja Addepally
2016-01-19 12:55:21 +00:00
parent f8f2d46002
commit 15f89c420b
5 changed files with 67 additions and 25 deletions
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13
lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.h
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@@ -14,6 +14,7 @@
#include <stdint.h>
// C++ Includes
#include <functional>
#include <vector>
// Other libraries and framework includes
@@ -231,6 +232,7 @@ private:
typedef DynamicSymbolColl::const_iterator DynamicSymbolCollConstIter;
typedef std::map<lldb::addr_t, lldb::AddressClass> FileAddressToAddressClassMap;
typedef std::function<lldb::offset_t (lldb_private::DataExtractor &, lldb::offset_t, lldb::offset_t)> SetDataFunction;
/// Version of this reader common to all plugins based on this class.
static const uint32_t m_plugin_version = 1;
@@ -279,7 +281,7 @@ private:
// Parses the ELF program headers.
static size_t
GetProgramHeaderInfo(ProgramHeaderColl &program_headers,
lldb_private::DataExtractor &data,
const SetDataFunction &set_data,
const elf::ELFHeader &header);
// Finds PT_NOTE segments and calculates their crc sum.
@@ -302,7 +304,7 @@ private:
/// Parses the elf section headers and returns the uuid, debug link name, crc, archspec.
static size_t
GetSectionHeaderInfo(SectionHeaderColl &section_headers,
lldb_private::DataExtractor &data,
const SetDataFunction &set_data,
const elf::ELFHeader &header,
lldb_private::UUID &uuid,
std::string &gnu_debuglink_file,
@@ -437,6 +439,13 @@ private:
static lldb_private::Error
RefineModuleDetailsFromNote (lldb_private::DataExtractor &data, lldb_private::ArchSpec &arch_spec, lldb_private::UUID &uuid);
static lldb::offset_t
SetData(const lldb_private::DataExtractor &src, lldb_private::DataExtractor &dst, lldb::offset_t offset, lldb::offset_t length);
lldb::offset_t
SetDataWithReadMemoryFallback(lldb_private::DataExtractor &dst, lldb::offset_t offset, lldb::offset_t length);
};
#endif // liblldb_ObjectFileELF_h_