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llvm-mirror/lib/DebugInfo
Pavel Labath e992eb498a Recommit "[DWARF] Add an api to get "interpreted" location lists"
This recommits 089c0f581492cd6e2a3d2927be3fbf60ea2d7e62, which was
reverted due to failing tests on big endian machines. It includes a fix
which I believe (I don't have BE machine) should fix this issue. The fix
consists of correcting the invocation DWARFYAML::EmitDebugSections,
which was missing one (default) function arguments, and so didn't
actually force the little-endian mode.

The original commit message follows.

Summary:
This patch adds DWARFDie::getLocations, which returns the location
expressions for a given attribute (typically DW_AT_location). It handles
both "inline" locations and references to the external location list
sections (currently only of the DW_FORM_sec_offset type). It is
implemented on top of DWARFUnit::findLoclistFromOffset, which is also
added in this patch. I tried to make their signatures similar to the
equivalent range list functionality.

The actual location list interpretation logic is in
DWARFLocationTable::visitAbsoluteLocationList. This part is not
equivalent to the range list code, but this deviation is motivated by a
desire to reuse the same location list parsing code within lldb.

The functionality is tested via a c++ unit test of the DWARFDie API.

Reviewers: dblaikie, JDevlieghere, SouraVX

Subscribers: mgorny, hiraditya, cmtice, probinson, llvm-commits, aprantl

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70394
2019-11-20 16:24:11 +01:00
..
CodeView Hide implementation details in anonymous namespaces. NFC. 2019-10-24 10:48:43 +02:00
DWARF Recommit "[DWARF] Add an api to get "interpreted" location lists" 2019-11-20 16:24:11 +01:00
GSYM Fix -Wsign-compare warning with clang-cl 2019-10-30 15:20:43 -07:00
MSF [llvm] Migrate llvm::make_unique to std::make_unique 2019-08-15 15:54:37 +00:00
PDB [PDB] Make pdb::DbiModuleDescriptor destructor trivial 2019-11-11 21:26:26 -08:00
Symbolize [Symbolize] Use the local MSVC C++ demangler instead of relying on dbghelp. NFC. 2019-10-16 20:38:44 +00:00
CMakeLists.txt
LLVMBuild.txt