This creates a library for fetching debug info by build ID, whether
locally or remotely via debuginfod. The functionality was refactored
out of existing code in the Symboliize library. Existing utilities
were refactored to use this library.
Reviewed By: phosek
Differential Revision: https://reviews.llvm.org/D132504
This library implements the class `DebuginfodCollection`, which scans a set of directories for binaries, classifying them according to whether they contain debuginfo. This also provides the `DebuginfodServer`, an `HTTPServer` which serves debuginfod's `/debuginfo` and `/executable` endpoints. This is intended as the final new supporting library required for `llvm-debuginfod`.
As implemented here, `DebuginfodCollection` only finds ELF binaries and DWARF debuginfo. All other files are ignored. However, the class interface is format-agnostic. Generalizing to support other platforms will require refactoring of LLVM's object parsing libraries to eliminate use of `report_fatal_error` ([[ https://github.com/llvm/llvm-project/blob/main/llvm/lib/Object/WasmObjectFile.cpp#L74 | e.g. when reading WASM files ]]), so that the debuginfod daemon does not crash when it encounters a malformed file on the disk.
The `DebuginfodCollection` is tested by end-to-end tests of the debuginfod server (D114846).
Reviewed By: mysterymath
Differential Revision: https://reviews.llvm.org/D114845
This change adds a simple LRU cache to the Symbolize class to put a cap
on llvm-symbolizer memory usage. Previously, the Symbolizer's virtual
memory footprint would grow without bound as additional binaries were
referenced.
I'm putting this out there early for an informal review, since there may be
a dramatically different/better way to go about this. I still need to
figure out a good default constant for the memory cap and benchmark the
implementation against a large symbolization workload. Right now I've
pegged max memory usage at zero for testing purposes, which evicts the whole
cache every time.
Unfortunately, it looks like StringRefs in the returned DI objects can
directly refer to the contents of binaries. Accordingly, the cache
pruning must be explicitly requested by the caller, as the caller must
guarantee that none of the returned objects will be used afterwards.
For llvm-symbolizer this a light burden; symbolization occurs
line-by-line, and the returned objects are discarded after each.
Implementation wise, there are a number of nested caches that depend
on one another. I've implemented a simple Evictor callback system to
allow derived caches to register eviction actions to occur when the
underlying binaries are evicted.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D119784
On some standard library configurations these have a dependency on the
complete type of SymbolizableModule. They also do a lot of
copying/freeing so no point in inlining them.
This adds a --build-id=<hex build ID> flag to llvm-symbolizer. If --obj
is unspecified, this will attempt to look up the provided build ID using
whatever mechanisms are available to the Symbolizer (typically,
debuginfod). The semantics are then as if the found binary were given
using the --obj flag.
Reviewed By: jhenderson, phosek
Differential Revision: https://reviews.llvm.org/D118633
Debuginfod can pull in libcurl as a dependency, which isn't appropriate
for libLLVM. (See
https://gitlab.freedesktop.org/mesa/mesa/-/issues/5732).
This change breaks out debuginfod into a separate non-component library
that can be used directly in llvm-symbolizer. The tool can inject
debuginfod into the Symbolizer library via an abstract DebugInfoFetcher
interface, breaking the dependency of Symbolizer on debuinfod.
See https://github.com/llvm/llvm-project/issues/52731
Reviewed By: phosek
Differential Revision: https://reviews.llvm.org/D118413
This change moves the SymbolizableObjectFile header to
include/llvm/DebugInfo/Symbolize. Making this header available to other
llvm libraries simplifies use cases where implicit caching, multiple
platform support and other features of the Symbolizer class are not
required. This also makes the dependent libraries easier to unit test
by having mocks which derive from SymbolizableModule.
Differential Revision: https://reviews.llvm.org/D116781
Adds a fallback to use the debuginfod client library (386655) in `findDebugBinary`.
Fixed a cast of Erorr::success() to Expected<> in debuginfod library.
Added Debuginfod to Symbolize deps in gn.
Updates compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh to include Debuginfod library to fix sanitizer-x86_64-linux breakage.
Reviewed By: jhenderson, vitalybuka
Differential Revision: https://reviews.llvm.org/D113717
Adds a fallback to use the debuginfod client library (386655) in `findDebugBinary`.
Fixed a cast of Erorr::success() to Expected<> in debuginfod library.
Added Debuginfod to Symbolize deps in gn.
Updates compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh to include Debuginfod library to fix sanitizer-x86_64-linux breakage.
Reviewed By: jhenderson, vitalybuka
Differential Revision: https://reviews.llvm.org/D113717
Adds a fallback to use the debuginfod client library (386655) in `findDebugBinary`.
Fixed a cast of Erorr::success() to Expected<> in debuginfod library.
Added Debuginfod to Symbolize deps in gn.
Adds new symbolizer symbols to `global_symbols.txt`.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D113717
This reverts commit 02cc8d698c because it
caused buildbot failures. The issue appears to be simply that we need to
only enable debuginfod when the HTTPClient has been initialized by the
running tool, since InitLLVM does not do the initialization step anymore.
Adds a fallback to use the debuginfod client library (386655) in `findDebugBinary`.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D113717
Add support for demangling Rust v0 symbols to LLVM symbolizer by reusing
nonMicrosoftDemangle which supports both Itanium and Rust mangling.
Reviewed By: dblaikie, jhenderson
Part of https://reviews.llvm.org/D110664
When we build with split dwarf in single mode the .o files that contain both "normal" debug sections and dwo sections, along with relocaiton sections for "normal" debug sections.
When we create DWARF context in DWARFObjInMemory we process relocations and store them in the map for .debug_info, etc section.
For DWO Context we also do it for non dwo dwarf sections. Which I believe is not necessary. This leads to a lot of memory being wasted. We observed 70GB extra memory being used.
I went with context sensitive approach, flag is passed in. I am not sure if it's always safe not to process relocations for regular debug sections if Obj contains .dwo sections.
If it is alternatvie might be just to scan, in constructor, sections and if there are .dwo sections not to process regular debug ones.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D106624
This patch intended to provide additional interface to LLVMsymbolizer
such that they work directly on object files. There is an existing
method - symbolizecode which takes an object file, this patch provides
similar overloads for symbolizeInlinedCode, symbolizeData,
symbolizeFrame. This can be useful for clients who already have a
in-memory object files to symbolize for.
Patch By: pvellien (praveen velliengiri)
Reviewed By: scott.linder
Differential Revision: https://reviews.llvm.org/D95232
llvm-symbolizer used to use the DIA SDK for symbolization on
Windows; this patch switches to using native symbolization, which was
implemented recently.
Users can still make the symbolizer use DIA by adding the `-dia` flag
in the LLVM_SYMBOLIZER_OPTS environment variable.
Differential Revision: https://reviews.llvm.org/D91814
Seems users have enough different uses of the symbolizer where they
might have unknown binaries and offsets such that "best effort" behavior
is all that's expected of llvm-symbolizer - so even erroring on unknown
executables and out of bounds offsets might not be suitable.
This reverts commit 1de0199748.
This reverts commit a7b209a6d4.
This reverts commit 338dd138ea.
Demangling Itanium symbols either consumes the whole input or fails,
but Microsoft symbols can be successfully demangled with just some
of the input.
Add an outparam that enables clients to know how much of the input was
consumed, and use this flag to give llvm-undname an opt-in warning
on partially consumed symbols.
Differential Revision: https://reviews.llvm.org/D80173
Summary: This implements searching for function symbols and public symbols by address.
More specifically,
-Implements NativeSession::findSymbolByAddress for function symbols and
public symbols. I think data symbols are also searched for, but isn't
implemented in this patch.
-Adds classes for NativeFunctionSymbol and NativePublicSymbol
-Adds a '-use-native-pdb-reader' option to llvm-symbolizer, for testing
purposes.
Reviewers: rnk, amccarth, labath
Subscribers: mgorny, hiraditya, MaskRay, rupprecht, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D79269
Summary:
1. FileLineInfoSpecifier::Default isn't the default for anything.
Rename to RawValue, which accurately reflects its role.
2. Most functions that take a part of a FileLineInfoSpecifier end up
constructing a full one later or plumb two values through. Make them
all just take a complete FileLineInfoSpecifier.
3. Printing basenames only was handled differently from all other
variants, make it parallel to all the other variants.
Reviewers: jhenderson
Subscribers: hiraditya, MaskRay, rupprecht, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D76394
Summary:
Error reporting in DebugInfoDWARF library currently done in three ways :
1. Direct calls to WithColor::error()/WithColor::warning()
2. ErrorPolicy defaultErrorHandler(Error E);
3. void dumpWarning(Error Warning);
additionally, other locations could have more variations:
lld/ELF/SyntheticSection.cpp
if (Error e = cu->tryExtractDIEsIfNeeded(false)) {
error(toString(sec) + ": " + toString(std::move(e)));
DebugInfo/DWARF/DWARFUnit.cpp
if (Error e = tryExtractDIEsIfNeeded(CUDieOnly))
WithColor::error() << toString(std::move(e));
Thus error reporting could look inconsistent. To have a consistent error
messages it is necessary to have a possibility to redefine error
reporting functions. This patch creates two handlers and allows to
redefine them. It also patches all places inside DebugInfoDWARF
to use these handlers.
The intention is always to use following handlers for error reporting
purposes inside DebugInfoDWARF:
DebugInfo/DWARF/DWARFContext.h
std::function<void(Error E)> RecoverableErrorHandler = WithColor::defaultErrorHandler;
std::function<void(Error E)> WarningHandler = WithColor::defaultWarningHandler;
This is last patch from series of patches: D74481, D74635, D75118.
Reviewers: jhenderson, dblaikie, probinson, aprantl, JDevlieghere
Reviewed By: jhenderson
Subscribers: grimar, hiraditya, llvm-commits
Tags: #llvm, #debug-info
Differential Revision: https://reviews.llvm.org/D74308
Summary:
Current LLVM code base does not use error handler with ErrorPolicy.
This patch removes ErrorPolicy from DWARFContext.
This patch is extracted from the D74308.
Reviewers: jhenderson, dblaikie, grimar, aprantl, JDevlieghere
Reviewed By: grimar
Subscribers: hiraditya, llvm-commits
Tags: #llvm, #debug-info
Differential Revision: https://reviews.llvm.org/D75118
This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.
This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.
This doesn't actually modify StringRef yet, I'll do that in a follow-up.
Build ID is a protocol for looking up debug files that's already
supported by various tools including debuggers. For example, when
locating debug files, gdb would check the following directories:
- /usr/lib/debug/.build-id/ab/cdef1234.debug
- /usr/bin/ls.debug
- /usr/bin/.debug/ls.debug
- /usr/lib/debug/usr/bin/ls.debug
llvm-symbolizer currently consults all of these except for build ID
based one. This patch implements support for build ID lookup. The
set of debug directories to search is specified by the new option:
--debug-file-directory, whose name matches the debug-file-directory
variable used by gdb for the same purpose.
Differential Revision: https://reviews.llvm.org/D70759
Fangrui Song