maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/lib
History
Yonghong Song 03e1c8b8f9 bpf: introduce -mattr=dwarfris to disable DwarfUsesRelocationsAcrossSections 
Commit e4507fb8c94b ("bpf: disable DwarfUsesRelocationsAcrossSections")
disables MCAsmInfo DwarfUsesRelocationsAcrossSections unconditionally
so that dwarf will not use cross section (between dwarf and symbol table)
relocations. This new debug format enables pahole to dump structures
correctly as libdwarves.so does not have BPF backend support yet.

This new debug format, however, breaks bcc (https://github.com/iovisor/bcc)
source debug output as llvm in-memory Dwarf support has some issues to
handle it. More specifically, with DwarfUsesRelocationsAcrossSections
disabled, JIT compiler does not generate .debug_abbrev and Dwarf
DIE (debug info entry) processing is not happy about this.

This patch introduces a new flag -mattr=dwarfris
(dwarf relocation in section) to disable DwarfUsesRelocationsAcrossSections.
DwarfUsesRelocationsAcrossSections is true by default.

Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 326505
 		2018-03-01 23:04:59 +00:00
..
Analysis [SCEV] Smart range calculation for SCEVUnknown Phis 2018-03-01 06:56:48 +00:00
AsmParser Make the LLParser accept call instructions of variables in the program AS 2018-02-27 11:15:11 +00:00
BinaryFormat Add DWARF for discriminated unions 2018-02-06 23:45:59 +00:00
Bitcode [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
CodeGen [DAGCombiner] When combining zero_extend of a truncate, only mask before extending for vectors. 2018-03-01 22:32:25 +00:00
DebugInfo [PDB] Defer writing the build id until the rest of the PDB is written. 2018-03-01 18:00:29 +00:00
Demangle Silence a bunch of implicit fallthrough warnings 2017-12-19 22:05:25 +00:00
ExecutionEngine [RuntimeDyld][MachO] Fix assertion in encodeAddend, add missing directive to 2018-03-01 01:44:33 +00:00
FuzzMutate [llvm-opt-fuzzer] Add another pack of passes for continuous fuzzing 2018-02-19 11:57:07 +00:00
Fuzzer
…
IR [MIRParser] Accept overloaded intrinsic names w/o type suffixes 2018-02-28 23:51:49 +00:00
IRReader LLParser: add an argument for overriding data layout and do not check alloca addr space 2018-01-30 22:32:39 +00:00
LTO [LTO] Support filtering by hotness threshold 2018-02-26 18:37:45 +00:00
LineEditor
…
Linker Revert "[IRMover] Implement name based structure type mapping" 2018-02-21 20:12:18 +00:00
MC [WebAssembly] Use uint8_t for single byte values to match the spec 2018-03-01 18:06:21 +00:00
Object [WebAssembly] Use uint8_t for single byte values to match the spec 2018-03-01 18:06:21 +00:00
ObjectYAML [WebAssembly] Remove DataSize from linking metadata section 2018-02-27 23:57:37 +00:00
Option [Option] For typo '-foo', suggest '--foo' 2018-01-09 19:38:04 +00:00
Passes Another try to commit 323321 (aggressive instruction combine). 2018-01-25 12:06:32 +00:00
ProfileData [SampleProf] NFC. Expose reusable functionality in SampleProfile. 2018-02-22 06:42:57 +00:00
Support Fix llvm-config --system-libs output on FreeBSD and NetBSD 2018-02-28 20:04:21 +00:00
TableGen TableGen: Remove VarInit::getFieldType 2018-02-25 20:50:17 +00:00
Target bpf: introduce -mattr=dwarfris to disable DwarfUsesRelocationsAcrossSections 2018-03-01 23:04:59 +00:00
Testing
…
ToolDrivers [COFF] Keep the underscore on exported decorated stdcall functions in MSVC mode 2018-01-20 11:44:32 +00:00
Transforms [InstCombine] allow fmul fold with less than 'fast' 2018-03-01 22:53:47 +00:00
WindowsManifest
…
XRay [XRay] clarify error messages when parsing broken traces 2018-01-30 13:41:34 +00:00
CMakeLists.txt
…
LLVMBuild.txt
…