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* [llvm-objcopy] Initial COFF supportMartin Storsjo2018-12-199-0/+762
| | | | | | | | | This is an initial implementation of no-op passthrough copying of COFF with objcopy. Differential Revision: https://reviews.llvm.org/D54939 llvm-svn: 349605
* [llvm-objcopy] Change Segment::Type from uint64_t to uint32_tFangrui Song2018-12-121-6/+6
| | | | | | | | | | | | | | | | | | Summary: In both Elf{32,64}_Phdr, the field Elf{32,64}_World p_type is uint32_t. Also reorder the fields to be similar to Elf64_Phdr (which is different from Elf32_Phdr but quite similar). Reviewers: rupprecht, jhenderson, jakehehrlich, alexshap, espindola Reviewed By: rupprecht Subscribers: emaste, arichardson, llvm-commits Differential Revision: https://reviews.llvm.org/D55618 llvm-svn: 348985
* llvm-objcopy: Improve/simplify llvm::Error handling during notes iterationDavid Blaikie2018-12-111-6/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using an Error as an out parameter from an indirect operation like iteration as described in the documentation ( http://llvm.org/docs/ProgrammersManual.html#building-fallible-iterators-and-iterator-ranges ) seems to be a little fussy - so here's /one/ possible solution, though I'm not sure it's the right one. Alternatively such APIs may be better off being switched to a standard algorithm style, where they take a lambda to do the iteration work that is then called back into (eg: "Error e = obj.for_each_note([](const Note& N) { ... });"). This would be safer than having an unwritten assumption that the user of such an iteration cannot return early from the inside of the function - and must always exit through the gift shop... I mean error checking. (even though it's guaranteed that if you're mid-way through processing an iteration, it's not in an error state). Alternatively we'd need some other (the super untrustworthy/thing we've generally tried to avoid) error handling primitive that actually clears the error state entirely so it's safe to ignore. Fleshed this solution out a bit further during review - it now relies on op==/op!= comparison as the equivalent to "if (Err)" testing the Error. So just like an Error must be checked (even if it's in a success state), the Error hiding in the iterator must be checked after each increment (including by comparison with another iterator - perhaps this could be constrained to only checking if the iterator is compared to the end iterator? Not sure it's too important). So now even just creating the iterator and not incrementing it at all should still assert because the Error has not been checked. Reviewers: lhames, jakehehrlich Differential Revision: https://reviews.llvm.org/D55235 llvm-svn: 348811
* [llvm-objcopy] Change --only-keep to --only-sectionJake Ehrlich2018-12-064-8/+8
| | | | | | | | | | | | I just hard core goofed when I wrote this and created a different name for no good reason. I'm failry aware of most "fresh" users of llvm-objcopy (that is, users which are not using it as a drop in replacement for GNU objcopy) and can say that only "-j" is being used by such people so this patch should strictly increase compatibility and not remove it. Differential Revision: https://reviews.llvm.org/D52180 llvm-svn: 348446
* [llvm-objcopy] Add --build-id-link-dir flagJake Ehrlich2018-12-035-3/+100
| | | | | | | | | | | | | | | This flag does not exist in GNU objcopy but has a major use case. Debugging tools support the .build-id directory structure to find debug binaries. There is no easy way to build this structure up however. One way to do it is by using llvm-readelf and some crazy shell magic. This implements the feature directly. It is most often the case that you'll want to strip a file and send the original to the .build-id directory but if you just want to send a file to the .build-id directory you can copy to /dev/null instead. Differential Revision: https://reviews.llvm.org/D54384 llvm-svn: 348174
* [llvm-objcopy] Delete redundant !Config.xx.empty() when followed by positive ↵Fangrui Song2018-11-291-11/+5
| | | | | | | | | | | | | | | | is_contained() check Summary: The original intention of !Config.xx.empty() was probably to emphasize the thing that is currently considered, but I feel the simplified form is actually easier to understand and it is also consistent with the call sites in other llvm components. Reviewers: alexshap, rupprecht, jakehehrlich, jhenderson, espindola Reviewed By: alexshap, rupprecht Subscribers: emaste, arichardson, llvm-commits Differential Revision: https://reviews.llvm.org/D55040 llvm-svn: 347891
* [llvm-objcopy] Hook up the -V alias to --version, output "GNU strip"Martin Storsjo2018-11-283-0/+4
| | | | | | | | | | | This allows libtool to detect the presence of llvm-strip and use it with the options --strip-debug and --strip-unneeded. Also hook up the -V alias for objcopy. Differential Revision: https://reviews.llvm.org/D54936 llvm-svn: 347731
* Use llvm::copy. NFCFangrui Song2018-11-171-5/+5
| | | | llvm-svn: 347126
* [llvm-objcopy] Use llvm::all_of and rename the variables "Segment" to avoid ↵Fangrui Song2018-11-171-6/+6
| | | | | | confusion with the type of the same name llvm-svn: 347123
* [llvm-objcopy] Rename --keep to --keep-section.Jordan Rupprecht2018-11-135-9/+11
| | | | | | | | | | | | | | | | Summary: llvm-objcopy/strip support `--keep` (for sections) and `--keep-symbols` (for symbols). For consistency and clarity, rename `--keep` to `--keep-section`. In fact, for GNU compatability, -K is --keep-symbol, so it's weird that the alias `-K` is not the same as the short-ish `--keep`. Reviewers: jakehehrlich, jhenderson, alexshap, MaskRay, espindola Reviewed By: jakehehrlich, MaskRay Subscribers: emaste, arichardson, llvm-commits Differential Revision: https://reviews.llvm.org/D54477 llvm-svn: 346782
* [llvm-objcopy] Don't copy Config when processing --keepFangrui Song2018-11-121-1/+1
| | | | llvm-svn: 346717
* [Support] Make error banner optional in logAllUnhandledErrorsJonas Devlieghere2018-11-112-2/+2
| | | | | | | | In a lot of places an empty string was passed as the ErrorBanner to logAllUnhandledErrors. This patch makes that argument optional to simplify the call sites. llvm-svn: 346604
* [llvm-strip] Check "strip" with StringRef::contains instead of ends_withFangrui Song2018-11-071-1/+1
| | | | | | | | | | | | | | Summary: If argv[0] is version suffixed, e.g. llvm-strip-7, this will still work. Reviewers: rupprecht, jhenderson, alexshap, jakehehrlich Reviewed By: rupprecht Subscribers: alexshap, jakehehrlich, llvm-commits Differential Revision: https://reviews.llvm.org/D54193 llvm-svn: 346292
* [llvm-objcopy/strip] [NFC] Clean up tablegen opts (clang-format + ↵Jordan Rupprecht2018-11-012-110/+108
| | | | | | reorganizing things). llvm-svn: 345896
* [llvm-strip] Support --keep and --strip-all-gnu from llvm-objcopyJordan Rupprecht2018-11-013-3/+13
| | | | | | | | | | | | | | Summary: Add --keep and --strip-all-gnu from llvm-objcopy into llvm-strip. Reviewers: jakehehrlich, jhenderson, alexshap Reviewed By: jhenderson, alexshap Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D53954 llvm-svn: 345861
* [llvm-objcopy] Support --{enable,disable}-deterministic-archivesJordan Rupprecht2018-11-015-4/+45
| | | | | | | | | | | | | | Summary: ar and objcopy/strip all support configuring whether archives are written deterministically (timestamps/UIDs/GIDs/etc zero'd). This has been ported to llvm-ar (the U/D modifiers) but not yet to llvm-objcopy/strip. Reviewers: jakehehrlich, jhenderson, alexshap Reviewed By: jhenderson Subscribers: ruiu, mgrang, llvm-commits Differential Revision: https://reviews.llvm.org/D53913 llvm-svn: 345859
* [llvm-objcopy] Don't apply --localize flags to common symbolsJordan Rupprecht2018-11-013-4/+8
| | | | | | | | | | | | | | | | | Summary: --localize-symbol and --localize-hidden will currently localize common symbols. GNU objcopy will not localize these symbols even when explicitly requested, which seems reasonable; common symbols should always be global so they can be merged during linking. See PR39461 Reviewers: jakehehrlich, jhenderson, alexshap, MaskRay, espindola Reviewed By: jakehehrlich, jhenderson, alexshap, MaskRay Subscribers: emaste, arichardson, alexshap, MaskRay, llvm-commits Differential Revision: https://reviews.llvm.org/D53782 llvm-svn: 345856
* [llvm-objcopy] For multiclass Eq, associate help text with --name= , not ↵Fangrui Song2018-11-012-81/+65
| | | | | | | | | | | | | | | | | | | | | | | | | | with --name Summary: Before: % llvm-objcopy -help ... --weaken-symbol=symbol Mark <symbol> as weak --weaken-symbol symbol Mark <symbol> as weak After: % llvm-objcopy -help ... --weaken-symbol=symbol Mark <symbol> as weak Reviewers: jhenderson, rupprecht, alexshap, jakehehrlich Reviewed By: jhenderson Subscribers: llvm-commits, kristina Differential Revision: https://reviews.llvm.org/D53983 llvm-svn: 345855
* [llvm-objcopy] Use proper casesFangrui Song2018-11-011-17/+17
| | | | | | | | | | | | Reviewers: jhenderson, alexshap, jakehehrlich, espindola, rupprecht Reviewed By: jhenderson, rupprecht Subscribers: emaste, arichardson, rupprecht, llvm-commits Differential Revision: https://reviews.llvm.org/D53971 llvm-svn: 345845
* [llvm-objcopy] Delete a redundant override whose base is emptyFangrui Song2018-10-311-1/+0
| | | | llvm-svn: 345684
* [llvm-objcopy] Fix --keep-global-symbol/--globalize-symbol for undefined ↵Jordan Rupprecht2018-10-301-2/+4
| | | | | | | | | | | | | | | | symbols. Summary: --keep-global-symbol and --globalize-symbol don't make sense for undefined symbols, so it should be ignored for those symbols. This matches GNU objcopy behavior. Reviewers: jhenderson, alexshap, jakehehrlich, espindola Reviewed By: jhenderson, jakehehrlich Subscribers: emaste, arichardson, llvm-commits Differential Revision: https://reviews.llvm.org/D53733 llvm-svn: 345614
* [llvm-objcopy] Move elf-specific code into subfolderAlexander Shaposhnikov2018-10-296-472/+540
| | | | | | | | | | | In this diff the elf-specific code is moved into the subfolder ELF (and factored out from llvm-objcopy.cpp). Test plan: make check-all Differential revision: https://reviews.llvm.org/D53790 llvm-svn: 345544
* [llvm-objcopy] Introduce dispatch mechanism based on the inputAlexander Shaposhnikov2018-10-243-29/+77
| | | | | | | | | | | | | In this diff we introduce dispatch mechanism based on the type of the input (archive, object file, raw binary) and the format (coff, elf, macho). We also move the ELF-specific code into the namespace llvm::objcopy::elf. Test plan: make check-all Differential revision: https://reviews.llvm.org/D53311 llvm-svn: 345217
* [llvm-objcopy] Fix use-after-move clang-tidy warningJordan Rupprecht2018-10-231-2/+2
| | | | llvm-svn: 345079
* [llvm-strip] Support -s alias for --strip-all. Make both strip and objcopy ↵Jordan Rupprecht2018-10-232-2/+5
| | | | | | | | | | | | | | | | | | | | | case sensitive to support both -s (--strip-all) and -S (--strip-debug). Summary: GNU strip supports both `-s` and `-S` as aliases for `--strip-all` and `--strip-debug`, respectfully. As part of this, it turns out that strip/objcopy were accepting case insensitive command line args. I'm not sure if there was an explicit reason for this. The only others uses of this are llvm-cvtres/llvm-mt/llvm-lib, which are all tools specific for windows support. Forcing case sensitivity allows both aliases to exist, but seems like a good idea anyway. And as a surprise test case adjustment, the llvm-strip unit test was running with `-keep=unavailable_symbol`, despite `keep` not be a valid flag for strip. This is because there is a flag `-K` which, when case insensitivity is permitted, allows it to be interpreted as `-K` = `eep=unavailable_symbol` (e.g. to allow `-Kfoo` == `--keep-symbol=foo`). Reviewers: jakehehrlich, jhenderson, alexshap Reviewed By: jakehehrlich Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D53163 llvm-svn: 345068
* [llvm-objcopy] Factor out BufferAlexander Shaposhnikov2018-10-166-74/+120
| | | | | | | | | | | | In this diff we move out the hierarchy of buffers from Object.h/Object.cpp into separate files since it is not ELF-specific and will be reused later. After this change Object.h/Object.cpp are almost exclusively ELF-specific. Test plan: make check-all Differential revision: https://reviews.llvm.org/D53298 llvm-svn: 344585
* [llvm-objcopy] Add -F|--target compatibilityJordan Rupprecht2018-10-122-2/+16
| | | | | | | | | | | | | | | | | Summary: This change adds support for the GNU --target flag, which sets both --input-target and --output-target. GNU objcopy doesn't do any checking for whether both --target and --{input,output}-target are used, and so it allows both, e.g. "--target A --output-target B" is equivalent to "--input-target A --output-target B" since the later command line flag would override earlier ones. This may be error prone, so I chose to implement it as an error if both are used. I'm not sure if anyone is actually using both. Reviewers: jakehehrlich, jhenderson, alexshap Reviewed By: jakehehrlich, alexshap Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D53029 llvm-svn: 344321
* [llvm-objcopy] Factor out CopyConfigAlexander Shaposhnikov2018-10-115-471/+541
| | | | | | | | | | | | In this diff we move out CopyConfig from llvm-oobjcopy.cpp into a separate header CopyConfig.h to enable us (in the future) reuse this class in the other implementations of objcopy (for coff, mach-o). Additionally this enables us to unload the complexity from llvm-objcopy.cpp a little bit. Test plan: make check-all Differential revision: https://reviews.llvm.org/D53006 llvm-svn: 344307
* Test commit: fix typo in commentArmando Montanez2018-10-101-1/+1
| | | | llvm-svn: 344185
* [opt] Change the parameter of OptTable::PrintHelp from Name to Usage and ↵Fangrui Song2018-10-101-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | don't append "[options] <inputs>" Summary: Before, "[options] <inputs>" is unconditionally appended to the `Name` parameter. It is more flexible to change its semantic to `Usage` and let user customize the usage line. % llvm-objcopy ... USAGE: llvm-objcopy <input> [ <output> ] [options] <inputs> With this patch: % llvm-objcopy ... USAGE: llvm-objcopy input [output] Reviewers: rupprecht, alexshap, jhenderson Reviewed By: rupprecht Subscribers: jakehehrlich, mehdi_amini, steven_wu, dexonsmith, llvm-commits Differential Revision: https://reviews.llvm.org/D51009 llvm-svn: 344097
* [llvm-objcopy] Make -S an alias for --strip-allJake Ehrlich2018-10-091-2/+2
| | | | | | -S should be an alias for --strip-all not --strip-all-gnu llvm-svn: 344080
* [llvm-objcopy] Adding support for decompressing zlib compressed dwarf sections.Puyan Lotfi2018-10-014-14/+148
| | | | | | | | | | | | | | | Summary: I had added support for compressing dwarf sections in a prior commit, this one adds support for decompressing. Usage is: llvm-objcopy --decompress-debug-sections input.o output.o Reviewers: jakehehrlich, jhenderson, alexshap Reviewed By: jhenderson Differential Revision: https://reviews.llvm.org/D51841 llvm-svn: 343451
* [llvm-objcopy/llvm-strip]: handle --versionJordan Rupprecht2018-09-213-0/+17
| | | | | | | | | | | | | | | | | Summary: Implement --version for objcopy and strip. I think there are LLVM utilities that automatically handle this, but that doesn't seem to work with custom parsing since this binary handles both objcopy and strip, so it uses custom parsing. This fixes PR38298 Reviewers: jhenderson, alexshap, jakehehrlich Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D52328 llvm-svn: 342702
* [llvm-objcopy] Add missing alias for --strip-all-gnuAlexander Shaposhnikov2018-09-171-0/+2
| | | | | | | | | | | | | This diff adds -S as an alias for --strip-all-gnu (for compatibility with binutils' objcopy). Patch by Dmitry Golovin! Test plan: make check-all Differential revision: https://reviews.llvm.org/D52163 llvm-svn: 342364
* [objcopy] make objcopy follow program header standardsJulie Hockett2018-09-121-7/+6
| | | | | | | | | | | | | | | | | | Submitted on behalf of Armando Montanez (amontanez@google.com). Objects with unused program headers copied by objcopy would always have nonzero values for program header offset and program header entry size. While technically valid, this atypical behavior triggers warnings in some tools. This change sets the two fields to zero when the program header is unused, better fitting the general expectations for unused program header data. Section headers behaved somewhat similarly (though only with the entry size), and are fixed in this revision as well. Differential Revision: https://reviews.llvm.org/D51961 llvm-svn: 342065
* [llvm-objcopy] Dwarf .debug section compression support (zlib, zlib-gnu).Puyan Lotfi2018-09-074-6/+176
| | | | | | | | | | | | | | | | | | | | | | | Third Attempt: - Alignment issues resolved. - zlib::isAvailable() detected. - ArrayRef misuse fixed. Usage: llvm-objcopy --compress-debug-sections=zlib foo.o llvm-objcopy --compress-debug-sections=zlib-gnu foo.o In both cases the debug section contents is compressed with zlib. In the GNU style case the header is the "ZLIB" magic string followed by the uint64 big- endian decompressed size. In the non-GNU mode the header is the Elf(32|64)_Chdr. Decompression support is coming soon. Differential Revision: https://reviews.llvm.org/D49678 llvm-svn: 341635
* Revert: [llvm-objcopy] Dwarf .debug section compression (Second Attempt).Puyan Lotfi2018-09-074-175/+6
| | | | | | Various bots still fail for unknown reason. llvm-svn: 341613
* [llvm-objcopy] Dwarf .debug section compression support (zlib, zlib-gnu).Puyan Lotfi2018-09-064-6/+175
| | | | | | | | | | | | | | | | | | | | Second Attempt. Alignment issues resolved. zlib::isAvailable() detected. Usage: llvm-objcopy --compress-debug-sections=zlib foo.o llvm-objcopy --compress-debug-sections=zlib-gnu foo.o In both cases the debug section contents is compressed with zlib. In the GNU style case the header is the "ZLIB" magic string followed by the uint64 big- endian decompressed size. In the non-GNU mode the header is the Elf(32|64)_Chdr. Decompression support is coming soon. Differential Revision: https://reviews.llvm.org/D49678 llvm-svn: 341607
* [llvm-strip] Support stripping multiple input filesJordan Rupprecht2018-09-051-14/+35
| | | | | | | | | | | | | | | | | Summary: Allow strip to be called on multiple input files, which is interpreted as stripping N files in place. Using multiple input files is incompatible with -o. To allow this, create a `DriverConfig` struct which just wraps a list of `CopyConfigs`. objcopy will only ever have a single `CopyConfig`, but strip will have N (where N >= 1) CopyConfigs. Reviewers: alexshap, jakehehrlich Reviewed By: alexshap, jakehehrlich Subscribers: MaskRay, jakehehrlich, llvm-commits Differential Revision: https://reviews.llvm.org/D51660 llvm-svn: 341464
* [llvm-strip] Allow copying relocation sections without symbol tables.Jordan Rupprecht2018-09-041-6/+9
| | | | | | | | | | | | | | | | | | | | | Summary: Fixes the error "Link field value 0 in section .rela.plt is invalid" when copying/stripping certain binaries. Minimal repro: ``` $ cat /tmp/a.c int main() { return 0; } $ clang -static /tmp/a.c -o /tmp/a $ llvm-strip /tmp/a -o /tmp/b llvm-strip: error: Link field value 0 in section .rela.plt is invalid. ``` Reviewers: jakehehrlich, alexshap Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D51493 llvm-svn: 341419
* Revert r341342: Dwarf .debug section compression support (zlib, zlib-gnu).Chandler Carruth2018-09-044-161/+6
| | | | | | | | | | | | Also reverts follow-up commits r341343 and r341344. The primary commit continues to break some build bots even after the fixes in r341343 for UBSan issues: http://lab.llvm.org:8011/builders/clang-cmake-aarch64-full/builds/5823 It is also failing for me locally (linux, x86-64). llvm-svn: 341360
* [NFC][llvm-objcopy] clang-formating Object.cppPuyan Lotfi2018-09-041-2/+1
| | | | llvm-svn: 341344
* [NFC][llvm-objcopy] Fixing a ubi-san problem with unaligned memory writes.Puyan Lotfi2018-09-041-3/+4
| | | | llvm-svn: 341343
* [llvm-objcopy] Dwarf .debug section compression support (zlib, zlib-gnu).Puyan Lotfi2018-09-034-6/+161
| | | | | | | | | | | | | | | | | | | Usage: llvm-objcopy --compress-debug-sections=zlib foo.o llvm-objcopy --compress-debug-sections=zlib-gnu foo.o In both cases the debug section contents is compressed with zlib. In the GNU style case the header is the "ZLIB" magic string followed by the uint64 big- endian decompressed size. In the non-GNU mode the header is the Elf(32|64)_Chdr. Decompression support is coming soon. Differential Revision: https://reviews.llvm.org/D49678 llvm-svn: 341342
* [llvm-strip] Fix -p|--preserve-dates to not truncate output when used in-place.Jordan Rupprecht2018-08-291-1/+2
| | | | | | | | The restoreDateOnFile() method used to preserve dates uses sys::fs::openFileForWrite(). That method defaults to opening files with CD_CreateAlways, which truncates the output file if it exists. Use CD_OpenExisting instead to open it and *not* truncate it, which also has the side benefit of erroring if the file does not exist (it should always exist, because we just wrote it out). Also, fix the test case to make sure the output is a valid output file, and not empty. The extra test assertions are enough to catch this regression. llvm-svn: 340996
* [llvm-objcopy] Simplify find(X,Y) != X.end() with is_contained()Fangrui Song2018-08-211-3/+3
| | | | llvm-svn: 340241
* [llvm-strip] Allow only one inputFangrui Song2018-08-201-3/+3
| | | | | | | | | | | | | | Summary: Before, llvm-strip accepted a second argument but it would just be ignored. Reviewers: alexshap, jhenderson, paulsemel Reviewed By: alexshap Subscribers: jakehehrlich, rupprecht, llvm-commits Differential Revision: https://reviews.llvm.org/D51004 llvm-svn: 340229
* [llvm-objcopy] Implement -G/--keep-global-symbol(s).Jordan Rupprecht2018-08-172-0/+54
| | | | | | | | | | | | | | | | | Summary: Port GNU Objcopy -G/--keep-global-symbol(s). This is slightly different than the already-implemented --globalize-symbol, which marks a symbol as global when copying. When --keep-global-symbol (alias -G) is used, *only* those symbols marked will stay global, and all other globals are demoted to local. (Also note that it doesn't *promote* a symbol to global). Additionally, there is a pluralized version of the flag --keep-global-symbols, which effectively applies --keep-global-symbol for every non-comment in a file. Reviewers: jakehehrlich, jhenderson, alexshap Reviewed By: jhenderson Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D50589 llvm-svn: 340105
* [llvm-objcopy] Add support for -I binary -B <arch>.Jordan Rupprecht2018-08-173-64/+273
| | | | | | | | | | | | | | | | | Summary: The -I (--input-target) and -B (--binary-architecture) flags exist but are currently silently ignored. This adds support for -I binary for architectures i386, x86-64 (and alias i386:x86-64), arm, aarch64, sparc, and ppc (powerpc:common64). This is largely based on D41687. This is done by implementing an additional subclass of Reader, BinaryReader, which works by interpreting the input file as contents for .data field, sets up a synthetic header, and adds additional sections/symbols (e.g. _binary__tmp_data_txt_start). Reviewers: jakehehrlich, alexshap, jhenderson, javed.absar Reviewed By: jhenderson Subscribers: jyknight, nemanjai, kbarton, fedor.sergeev, jrtc27, kristof.beyls, paulsemel, llvm-commits Differential Revision: https://reviews.llvm.org/D50343 llvm-svn: 340070
* [llvm-strip] Add support for -p/--preserve-datesJordan Rupprecht2018-08-163-4/+48
| | | | | | | | | | | | | | Summary: [llvm-strip] Preserve access/modification timestamps when -p is used. Reviewers: jakehehrlich, jhenderson, alexshap Reviewed By: jhenderson Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D50744 llvm-svn: 339921
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