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Jordan Rupprecht 5b7ad42729 [DebugInfo] Fix /usr/lib/debug llvm-symbolizer lookup with relative paths 
Summary:
rL189250 added a realpath call, and rL352916 because realpath breaks assumptions with some build systems. However, the /usr/lib/debug case has been clarified, falling back to /usr/lib/debug is currently broken if the obj passed in is a relative path. Adding a call to use absolute paths when falling back to /usr/lib/debug fixes that while still not making any realpath assumptions.

This also adds a --fallback-debug-path command line flag for testing (since we probably can't write to /usr/lib/debug from buildbot environments), but was also verified manually:

```
$ rm -f path/to/dwarfdump-test.elf-x86-64
$ strace llvm-symbolizer --obj=relative/path/to/dwarfdump-test.elf-x86-64.debuglink 0x40113f |& grep dwarfdump
```

Lookups went to relative/path/to/dwarfdump-test.elf-x86-64, relative/path/to/.debug/dwarfdump-test.elf-x86-64, and then finally /usr/lib/debug/absolute/path/to/dwarfdump-test.elf-x86-64.

Reviewers: dblaikie, samsonov

Reviewed By: dblaikie

Subscribers: krytarowski, aprantl, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57916

llvm-svn: 353730
 		2019-02-11 18:05:48 +00:00
..
bugpoint [opaque pointer types] Pass value type to LoadInst creation. 2019-02-01 20:44:24 +00:00
bugpoint-passes Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
dsymutil Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
gold Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llc Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
lli [opaque pointer types] Add a FunctionCallee wrapper type, and use it. 2019-02-01 02:28:03 +00:00
llvm-ar Revert r353424 "[llvm-ar][libObject] Fix relative paths when nesting thin archives." 2019-02-08 10:16:45 +00:00
llvm-as Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-as-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-bcanalyzer Implementation of asm-goto support in LLVM 2019-02-08 20:48:56 +00:00
llvm-c-test [LLVM-C] Add Bindings to GlobalIFunc 2019-02-05 18:05:44 +00:00
llvm-cat Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-cfi-verify Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-config Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-cov Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-cvtres Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-cxxdump Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-cxxfilt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-cxxmap Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-diff Replace llvm::isPodLike<...> by llvm::is_trivially_copyable<...> 2019-01-20 21:19:56 +00:00
llvm-dis Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-dwarfdump lvm-dwarfdump: Stop counting out-of-line subprogram in the "inlined functions" statistic. 2019-02-08 00:51:33 +00:00
llvm-dwp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-elfabi [elfabi] Fix the type of the variable formated for error output 2019-02-05 22:23:46 +00:00
llvm-exegesis [AsmPrinter] Remove hidden flag -print-schedule. 2019-02-04 12:51:26 +00:00
llvm-extract Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-go Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-isel-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-itanium-demangle-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-jitlistener Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-link Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-lto Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-lto2 Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-mc Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-mc-assemble-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-mc-disassemble-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-mca [AsmPrinter] Remove hidden flag -print-schedule. 2019-02-04 12:51:26 +00:00
llvm-microsoft-demangle-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-modextract Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-mt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-nm Compute the correct symbol size in llvm-nm even without --print-size 2019-02-03 22:40:01 +00:00
llvm-objcopy Small refactoring of FileError. NFC. 2019-02-11 09:49:37 +00:00
llvm-objdump [WebAssembly] clang-tidy (NFC) 2019-02-04 19:13:39 +00:00
llvm-opt-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-opt-report Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-pdbutil [NativePDB] Fix access to both old & new fpo data entries from dbi stream 2019-01-30 10:40:45 +00:00
llvm-profdata [PGO] Fix the type of the formated variable 2019-02-05 18:09:28 +00:00
llvm-rc Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-readobj [WebAssembly] Fix imported function symbol names that differ from their import names in the .o format 2019-02-07 22:03:32 +00:00
llvm-rtdyld Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-shlib Revert r351833 and r352250. 2019-01-29 13:43:22 +00:00
llvm-size Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-special-case-list-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-split Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-stress Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-strings Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-symbolizer [DebugInfo] Fix /usr/lib/debug llvm-symbolizer lookup with relative paths 2019-02-11 18:05:48 +00:00
llvm-undname Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-xray Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
llvm-yaml-numeric-parser-fuzzer Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
lto Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
msbuild Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
obj2yaml [yaml2obj][obj2yaml] - Add support for dumping/parsing .dynamic sections. 2019-02-09 11:34:28 +00:00
opt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
opt-remarks Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
opt-viewer [opt-viewer] Add --filter option to select remarks for displaying. 2019-02-06 18:43:37 +00:00
sancov Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
sanstats Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
verify-uselistorder Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
xcode-toolchain [CMake] Use LLVM_ENABLE_IDE instead of CMAKE_CONFIGURATION_TYPES 2018-10-15 21:20:02 +00:00
yaml2obj [yaml2obj] - Fix .dynamic section entries writing for 32bit targets. 2019-02-10 08:35:38 +00:00
CMakeLists.txt Fix most of LLVM's tests with LLVM_ENABLE_PIC=OFF 2019-01-16 20:44:36 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00