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* [MC] Sort FDEs by the associated CIE before emitting them.Eli Friedman2019-03-141-1/+25
| | | | | | | | | | | | | | | | This isn't necessary according to the DWARF standard, but it matches the .eh_frame sections emitted by other tools in practice, and the Android libunwindstack rejects .eh_frame sections where an FDE refers to a CIE other than the closest previous CIE. So match the other tools and also sort accordingly. I consider this a bug in libunwindstack, but it's easy enough to emit a compatible .eh_frame section for compatibility with installed operating systems. Differential Revision: https://reviews.llvm.org/D58266 llvm-svn: 356216
* [DWARF] Make -g with empty assembler source work better.Paul Robinson2019-03-011-7/+17
| | | | | | | | | | | | | This was sometimes causing clang or llvm-mc to crash, and in other cases could emit a bogus DWARF line-table header. I did an interim patch in r352541; this patch should be a cleaner and more complete fix, and retains the test. Addresses PR40538. Differential Revision: https://reviews.llvm.org/D58750 llvm-svn: 355226
* Update the file headers across all of the LLVM projects in the monorepoChandler Carruth2019-01-191-4/+3
| | | | | | | | | | | | | | | | | to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
* [Dwarf/AArch64] Return address signing B key dwarf supportLuke Cheeseman2018-12-211-12/+17
| | | | | | | | | | | | | | | | | | | | | | | | | - When signing return addresses with -msign-return-address=<scope>{+<key>}, either the A key instructions or the B key instructions can be used. To correctly authenticate the return address, the unwinder/debugger must know which key was used to sign the return address. - When and exception is thrown or a break point reached, it may be necessary to unwind the stack. To accomplish this, the unwinder/debugger must be able to first authenticate an the return address if it has been signed. - To enable this, the augmentation string of CIEs has been extended to allow inclusion of a 'B' character. Functions that are signed using the B key variant of the instructions should have and FDE whose associated CIE has a 'B' in the augmentation string. - One must also be able to preserve these semantics when first stepping from a high level language into assembly and then, as a second step, into an object file. To achieve this, I have introduced a new assembly directive '.cfi_b_key_frame ', that tells the assembler the current frame uses return address signing with the B key. - This ensures that the FDE is associated with a CIE that has 'B' in the augmentation string. Differential Revision: https://reviews.llvm.org/D51798 llvm-svn: 349895
* [AArch64] - Return address signing dwarf supportLuke Cheeseman2018-12-181-0/+4
| | | | | | | | | | | | | | - Reapply changes intially introduced in r343089 - The archtecture info is no longer loaded whenever a DWARFContext is created - The runtimes libraries (santiziers) make use of the dwarf context classes but do not intialise the target info - The architecture of the object can be obtained without loading the target info - Adding a method to the dwarf context to get this information and multiplex the string printing later on Differential Revision: https://reviews.llvm.org/D55774 llvm-svn: 349472
* Revert r347490 as it breaks address sanitizer buildsLuke Cheeseman2018-11-231-4/+0
| | | | llvm-svn: 347499
* Revert r343341Luke Cheeseman2018-11-231-0/+4
| | | | | | | - Cannot reproduce the build failure locally and the build logs have been deleted. llvm-svn: 347490
* Fix .cfi_restore with register numbers > 64Alexander Richardson2018-11-131-1/+6
| | | | | | | | | | | | | | | | | | | Summary: DW_CFA_restore can only encode register numbers up to 64 (6 bits unsigned int). For regsiter numbers > 64 we have to use DW_CFA_restore_extended instead which uses a ULEB128 value. I discovered this problem in the out-of-tree CHERI target since we use DWARF register number 89 for our return capability register. Reviewers: probinson, dblaikie, aprantl, espindola Reviewed By: dblaikie Subscribers: JohnReagan, emaste, JDevlieghere, llvm-commits Differential Revision: https://reviews.llvm.org/D54420 llvm-svn: 346751
* Revert r343317Luke Cheeseman2018-09-281-4/+0
| | | | | | - asan buildbots are breaking and I need to investigate the issue llvm-svn: 343341
* Reapply changes reverted by r343235Luke Cheeseman2018-09-281-0/+4
| | | | | | | | - Add fix so that all code paths that create DWARFContext with an ObjectFile initialise the target architecture in the context - Add an assert that the Arch is known in the Dwarf CallFrameString method llvm-svn: 343317
* Revert r343192 as an ubsan build is currently failingLuke Cheeseman2018-09-271-4/+0
| | | | llvm-svn: 343235
* Reapply changes reverted in r343114, lldb patch to follow shortlyLuke Cheeseman2018-09-271-0/+4
| | | | llvm-svn: 343192
* Revert r343112 as CallFrameString API change has broken lldb buildsLuke Cheeseman2018-09-261-4/+0
| | | | llvm-svn: 343114
* [AArch64] - Return address signing dwarf supportLuke Cheeseman2018-09-261-0/+4
| | | | | | - Reapply r343089 with a fix for DebugInfo/Sparc/gnu-window-save.ll llvm-svn: 343112
* Revert r343089 "[AArch64] - Return address signing dwarf support"Hans Wennborg2018-09-261-4/+0
| | | | | | | | | | | | | | | | | | | This caused the DebugInfo/Sparc/gnu-window-save.ll test to fail. > Functions that have signed return addresses need additional dwarf support: > - After signing the LR, and before authenticating it, the LR register is in a > state the is unusable by a debugger or unwinder > - To account for this a new directive, .cfi_negate_ra_state, is added > - This directive says the signed state of the LR register has now changed, > i.e. unsigned -> signed or signed -> unsigned > - This directive has the same CFA code as the SPARC directive GNU_window_save > (0x2d), adding a macro to account for multiply defined codes > - This patch matches the gcc implementation of this support: > https://patchwork.ozlabs.org/patch/800271/ > > Differential Revision: https://reviews.llvm.org/D50136 llvm-svn: 343103
* [AArch64] - Return address signing dwarf supportLuke Cheeseman2018-09-261-0/+4
| | | | | | | | | | | | | | | | | Functions that have signed return addresses need additional dwarf support: - After signing the LR, and before authenticating it, the LR register is in a state the is unusable by a debugger or unwinder - To account for this a new directive, .cfi_negate_ra_state, is added - This directive says the signed state of the LR register has now changed, i.e. unsigned -> signed or signed -> unsigned - This directive has the same CFA code as the SPARC directive GNU_window_save (0x2d), adding a macro to account for multiply defined codes - This patch matches the gcc implementation of this support: https://patchwork.ozlabs.org/patch/800271/ Differential Revision: https://reviews.llvm.org/D50136 llvm-svn: 343089
* [MC/Dwarf] Unclamp DWARF linetables format on Darwin.Jonas Devlieghere2018-09-131-7/+1
| | | | | | | | | | | In r319995, we fixed the line table format to version 2 on Darwin because dsymutil didn't yet understand the new format which caused test failures for the LLDB bots. This has been resolved in the meantime so there's no reason to keep this limitation. rdar://problem/35968332 llvm-svn: 342136
* [DWARF] Unclamp line table version on Darwin for v5 and later.Jonas Devlieghere2018-08-081-3/+6
| | | | | | | | | On Darwin we pin the DWARF line tables to version 2. Stop doing so for DWARF v5 and later. Differential revision: https://reviews.llvm.org/D49381 llvm-svn: 339288
* [DebugInfo] Generate fixups as emitting DWARF .debug_line.Hsiangkai Wang2018-08-011-0/+51
| | | | | | | | | | | | | | | | It is necessary to generate fixups in .debug_line as relaxation is enabled due to the address delta may be changed after relaxation. DWARF will record the mappings of lines and addresses in .debug_line section. It will encode the information using special opcodes, standard opcodes and extended opcodes in Line Number Program. I use DW_LNS_fixed_advance_pc to encode fixed length address delta and DW_LNE_set_address to encode absolute address to make it possible to generate fixups in .debug_line section. Differential Revision: https://reviews.llvm.org/D46850 llvm-svn: 338477
* Remove trailing spaceFangrui Song2018-07-301-1/+1
| | | | | | sed -Ei 's/[[:space:]]+$//' include/**/*.{def,h,td} lib/**/*.{cpp,h} llvm-svn: 338293
* Use debug-prefix-map for AT_NAMEJonas Devlieghere2018-07-111-8/+1
| | | | | | | | | | | | | | | | | | AT_NAME was being emitted before the directory paths were remapped. This ensures that all paths are remapped before anything is emitted. An additional test case has been added. Note that this only works if the replacement string is an absolute path. If not, then AT_decl_file believes the new path is a relative path, and joins that path with the compilation directory. I do not know of a good way to resolve this. Patch by: Siddhartha Bagaria (starsid) Differential revision: https://reviews.llvm.org/D49169 llvm-svn: 336793
* Support -fdebug-prefix-map in llvm-mc. This is useful to omit thePaul Robinson2018-07-101-4/+12
| | | | | | | | | | | debug compilation dir when compiling assembly files with -g. Part of PR38050. Patch by Siddhartha Bagaria! Differential Revision: https://reviews.llvm.org/D48988 llvm-svn: 336680
* [DWARF] Don't keep a ref to possibly stack allocated data.Paul Robinson2018-06-201-2/+2
| | | | llvm-svn: 335146
* [DWARFv5] Tolerate files not all having an MD5 checksum.Paul Robinson2018-06-141-14/+10
| | | | | | | | | | | | | | | | | | In some cases, for example when compiling a preprocessed file, the front-end is not able to provide an MD5 checksum for all files. When that happens, omit the MD5 checksums from the final DWARF, because DWARF doesn't have a way to indicate that some but not all files have a checksum. When assembling a .s file, and some but not all .file directives provide an MD5 checksum, issue a warning and don't emit MD5 into the DWARF. Fixes PR37623. Differential Revision: https://reviews.llvm.org/D48135 llvm-svn: 334710
* [DWARFv5] llvm-mc -dwarf-version does not imply -g.Paul Robinson2018-06-121-7/+14
| | | | | | | | | | | | | Don't provide the assembler source as the "root file" unless the user asked to have debug info for the assembler source (with -g). If the source doesn't provide an explicit ".file 0" then (a) use the compilation directory as directory #0, and (b) use the file #1 info for file #0 also. Differential Revision: https://reviews.llvm.org/D48055 llvm-svn: 334512
* Support: Simplify endian stream interface. NFCI.Peter Collingbourne2018-05-181-8/+4
| | | | | | | | | | | | Provide some free functions to reduce verbosity of endian-writing a single value, and replace the endianness template parameter with a field. Part of PR37466. Differential Revision: https://reviews.llvm.org/D47032 llvm-svn: 332757
* Reapply "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-291-27/+34
| | | | | | | | | | | | | | | | | DWARF v5 specifies that the root file (also given in the DW_AT_name attribute of the compilation unit DIE) should be emitted explicitly to the line table's list of files. This makes the line table more independent of the .debug_info section. We emit the new syntax only for DWARF v5 and later. Fixes the bug found by asan. Also XFAIL the new test for Darwin, which is stuck on DWARF v2, and fix up other tests so they stop failing on Windows. Last but not least, don't break "clang -g" of an assembler file that has .file directives in it. Differential Revision: https://reviews.llvm.org/D44054 llvm-svn: 328805
* Revert "Reapply "[DWARFv5] Emit file 0 to the line table.""Alexander Potapenko2018-03-281-34/+27
| | | | | | | | | | | | | | | This reverts commit r328676. Commit r328676 broke the -no-integrated-as flag necessary to build Linux kernel with Clang: $ cat t.c void foo() {} $ clang -no-integrated-as -c t.c -g /tmp/t-dcdec5.s: Assembler messages: /tmp/t-dcdec5.s:8: Error: file number less than one clang-7.0: error: assembler command failed with exit code 1 (use -v to see invocation) llvm-svn: 328699
* Reapply "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-271-27/+34
| | | | | | | | | | | | | | | | DWARF v5 specifies that the root file (also given in the DW_AT_name attribute of the compilation unit DIE) should be emitted explicitly to the line table's list of files. This makes the line table more independent of the .debug_info section. Fixes the bug found by asan. Also XFAIL the new test for Darwin, which is stuck on DWARF v2, and fix up other tests so they stop failing on Windows. Last but not least, don't break "clang -g" of an assembler file that has .file directives in it. Differential Revision: https://reviews.llvm.org/D44054 llvm-svn: 328676
* [DWARF] Suppress split line tables more carefully.Paul Robinson2018-03-271-2/+5
| | | | | | | | | | | | | | | | If a given split type unit does not have source locations, don't have it refer to the split line table. If no split type unit refers to the split line table, don't emit the line table at all. This will save a little space on rare occasions, but also refactors things a bit to improve which class is responsible for what. Responding to review comments on r326395. Differential Revision: https://reviews.llvm.org/D44220 llvm-svn: 328670
* Revert "Reapply "[DWARFv5] Emit file 0 to the line table.""Alexander Kornienko2018-03-071-34/+27
| | | | | | | | | | | | | | | | This reverts commit r326839. r326839 breaks assembly file parsing: $ cat q.c void g() {} $ clang -S q.c -g $ clang -g -c q.s q.s:9:2: error: file number already allocated .file 1 "/tmp/test" "q.c" ^ llvm-svn: 326902
* Reapply "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-061-27/+34
| | | | | | | | Fixes the bug found by asan. Also XFAIL the new test for Darwin, which is stuck on DWARF v2, and fix up other tests so they stop failing on Windows. llvm-svn: 326839
* Revert "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-061-34/+27
| | | | | | | | | Caused an asan failure. This reverts commit d54883f081186cdcce74e6f98cfc0438579ec019. aka r326758 llvm-svn: 326762
* [DWARFv5] Emit file 0 to the line table.Paul Robinson2018-03-061-27/+34
| | | | | | | | | | | DWARF v5 specifies that the root file (also given in the DW_AT_name attribute of the compilation unit DIE) should be emitted explicitly to the line table's list of files. This makes the line table more independent of the .debug_info section. Differential Revision: https://reviews.llvm.org/D44054 llvm-svn: 326758
* [DebugInfo] Support DWARF v5 source code embedding extensionScott Linder2018-02-231-10/+41
| | | | | | | | | | | | | | | | | | | In DWARF v5 the Line Number Program Header is extensible, allowing values with new content types. In this extension a content type is added, DW_LNCT_LLVM_source, which contains the embedded source code of the file. Add new optional attribute for !DIFile IR metadata called source which contains source text. Use this to output the source to the DWARF line table of code objects. Analogously extend METADATA_FILE in Bitcode and .file directive in ASM to support optional source. Teach llvm-dwarfdump and llvm-objdump about the new values. Update the output format of llvm-dwarfdump to make room for the new attribute on file_names entries, and support embedded sources for the -source option in llvm-objdump. Differential Revision: https://reviews.llvm.org/D42765 llvm-svn: 325970
* [DWARFv5] Turn an assert into a diagnostic. Hand-coded assembler filesPaul Robinson2018-02-221-12/+18
| | | | | | | | should not trigger assertions. Differential Revision: https://reviews.llvm.org/D43152 llvm-svn: 325831
* [DWARFv5] Emit .debug_line_str (in a non-DWO file).Paul Robinson2018-02-061-22/+109
| | | | | | | | This should enable the linker to do string-pooling of path names. Differential Revision: https://reviews.llvm.org/D42707 llvm-svn: 324393
* Turn two static functions into methods, to simplify calling them.Paul Robinson2018-01-301-14/+6
| | | | llvm-svn: 323821
* [DWARFv5] MC support for MD5 file checksumsPaul Robinson2018-01-091-7/+26
| | | | | | | Extend .file directive syntax to allow specifying an MD5 checksum for the source file. Emit the checksums in DWARF v5 line tables. llvm-svn: 322134
* [MC] Allow .file directives to be out-of-orderPaul Robinson2017-12-141-1/+2
| | | | llvm-svn: 320727
* [MC/Dwarf] Use the older DWARF linetables format on Darwin.Davide Italiano2017-12-071-0/+3
| | | | | | | | | | dsymutil doesn't yet understand the new format and the change, among others, breaks a large fraction of the debugger tests on mac OS. rdar://problem/35856354 llvm-svn: 319995
* [DWARFv5] Emit v5 line table header.Paul Robinson2017-12-051-32/+84
| | | | | | Differential Revision: https://reviews.llvm.org/D40741 llvm-svn: 319827
* Re-submit r289925 (Update .debug_line section version to match DWARF version)Paul Robinson2017-12-041-2/+12
| | | | | | | | | | | | | | | Set the .debug_line version to match the requested DWARF version, except with a maximum of v4 because we don't support v5 yet. Previously Chromium had issues with this patch; see PR31407. Chromium tool issues have been addressed, so hopefully this will go through this time. Patch by Katya Romanova! Differential Revision: https://reviews.llvm.org/D38002 llvm-svn: 319699
* [MC] Handle unknown literal register numbers in .cfi_* directivesJake Ehrlich2017-12-011-6/+6
| | | | | | | | | | | | | | | | | r230670 introduced a step to map EH register numbers to standard DWARF register numbers. This failed to consider the case when a user .cfi_* directive uses an integer literal rather than a register name, to specify a DWARF register number that has no corresponding LLVM register number (e.g. a special register that the compiler and assembler have no name for). Fixes PR34028. Patch by Roland McGrath Differential Revision: https://reviews.llvm.org/D36493 llvm-svn: 319586
* MC: simplify internal function call parameterSaleem Abdulrasool2017-07-291-30/+26
| | | | | | | | | | Rather than passing along most of the parameters, pass a reference to the MCDWARFrameInfo instead. This makes it easier to pass additional information about the frame to the checks. We need to keep the extra constructor for the Key around to allow the construction of the null and tombstone keys. NFC. llvm-svn: 309493
* MC: account for the return column in the CIE keySaleem Abdulrasool2017-07-291-8/+11
| | | | | | | | If the return column is different, we cannot coalesce the CIE across the FDEs. Add that to the key calculation. This ensures that we emit a separate CIE. llvm-svn: 309492
* MC: add support for cfi_return_columnSaleem Abdulrasool2017-07-281-10/+12
| | | | | | | | | This adds support for the CFI pseudo-op return_column. This specifies the frame table column which contains the return address. Addresses PR33953! llvm-svn: 309360
* Move Object format code to lib/BinaryFormat.Zachary Turner2017-06-071-1/+1
| | | | | | | | | | | | This creates a new library called BinaryFormat that has all of the headers from llvm/Support containing structure and layout definitions for various types of binary formats like dwarf, coff, elf, etc as well as the code for identifying a file from its magic. Differential Revision: https://reviews.llvm.org/D33843 llvm-svn: 304864
* Sort the remaining #include lines in include/... and lib/....Chandler Carruth2017-06-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | I did this a long time ago with a janky python script, but now clang-format has built-in support for this. I fed clang-format every line with a #include and let it re-sort things according to the precise LLVM rules for include ordering baked into clang-format these days. I've reverted a number of files where the results of sorting includes isn't healthy. Either places where we have legacy code relying on particular include ordering (where possible, I'll fix these separately) or where we have particular formatting around #include lines that I didn't want to disturb in this patch. This patch is *entirely* mechanical. If you get merge conflicts or anything, just ignore the changes in this patch and run clang-format over your #include lines in the files. Sorry for any noise here, but it is important to keep these things stable. I was seeing an increasing number of patches with irrelevant re-ordering of #include lines because clang-format was used. This patch at least isolates that churn, makes it easy to skip when resolving conflicts, and gets us to a clean baseline (again). llvm-svn: 304787
* Distinguish between code pointer size and DataLayout::getPointerSize() in ↵Konstantin Zhuravlyov2017-04-171-10/+11
| | | | | | DWARF info generation llvm-svn: 300463
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