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* ObjectFile: parse EABI AttributesSaleem Abdulrasool2016-04-231-0/+4
| | | | | | | | This adds basic parsing of the EABI attributes section. This section contains additional information about the target for which the file was built. Attempt to infer additional architecture information from that section. llvm-svn: 267291
* Improve the handling of missing elf symtab and missing symbol sizesTamas Berghammer2016-02-181-3/+4
| | | | | | | | | | | | | | | * Generate artificial symbol names from eh_fame during symbol parsing so these symbols are already present when we calcualte the size of the symbols where 0 is specified. * Fix symbol size calculation for the last symbol in the file where it have to last until the end of the parent section. This is the re-commit of the original change after fixing some test failures on OSX. Differential revision: http://reviews.llvm.org/D16996 llvm-svn: 261205
* Revert "Improve the handling of missing elf symtab and missing symbol sizes"Tamas Berghammer2016-02-101-4/+3
| | | | | | | | This reverts commit 252dda67782f2cbf838e375bce21ed4191f6d9ce. The commit caused several test failure on the OSX build bot. llvm-svn: 260377
* Improve the handling of missing elf symtab and missing symbol sizesTamas Berghammer2016-02-101-3/+4
| | | | | | | | | | | | * Generate artificial symbol names from eh_fame during symbol parsing so these symbols are already present when we calcualte the size of the symbols where 0 is specified. * Fix symbol size calculation for the last symbol in the file where it have to last until the end of the parent section. Differential revision: http://reviews.llvm.org/D16996 llvm-svn: 260369
* Fix for Bug 25338Ravitheja Addepally2016-01-191-2/+11
| | | | | | | | | | | | | | | | Summary: The issue arises because LLDB is not able to read the vdso library correctly. The fix adds memory allocation callbacks to allocate sufficient memory in case the requested offsets don't fit in the memory buffer allocated for the ELF. Reviewers: lldb-commits, clayborg, deepak2427, ovyalov, labath, tberghammer Differential Revision: http://reviews.llvm.org/D16107 llvm-svn: 258122
* Update for llvm change. NFC.Rafael Espindola2016-01-181-1/+1
| | | | llvm-svn: 258080
* Make core files not crash when you load a core file into LLDB with just ↵Greg Clayton2015-10-281-0/+6
| | | | | | | | | | | | | | | "lldb -c core". To do this I added a few new ways to determine the OS from PT_NOTE notes in the ELF file: 1 - Look for "LINUX" notes which indicate "linux" should be the OS 2 - Look through the "CORE" notes with NT_FILE as the type and sniff data from the paths listed in this section. On Ubuntu they contain "/lib/x86_64-linux-gnu" which has the triple and allows us to set "linux" as the OS in the architecture returned from ObjectFileELF::GetArchitecture(). Setting the OS correctly allows us to get the triple correct so we can extract registers without asserting and killing LLDB. Also use the data from the NT_FILE to set the main executable if one isn't set in ProcessElfCore::DoLoadCore(). llvm-svn: 251537
* Fix Clang-tidy modernize-use-override warnings in ↵Eugene Zelenko2015-10-231-4/+9
| | | | | | source/Plugins/ObjectContainer and ObjectFile; other minor fixes. llvm-svn: 251119
* Fix [vdso] handling on Android (x86 and aarch64)Tamas Berghammer2015-06-301-1/+1
| | | | | | | | | | | | | | * Add in-memory object file handling to the core dynamic loader * Fix in memory object file handling in ObjectFileELF (previously only part of the file was loaded before parsing) * Fix load address setting in ObjectFileELF for 32-bit targets when the load bias is negative * Change hack in DYLDRendezvous.cpp to be more specific and not to interfere with object files with fixed load address Differential revision: http://reviews.llvm.org/D10800 llvm-svn: 241057
* Ignore mapping symbols on aarch64Tamas Berghammer2015-04-071-0/+5
| | | | | | | | | | | ELF symbol tables on aarch64 may contains some mapping symbols. They provide information about the underlying data but interfere with symbol look-up of lldb. They are already ignored on arm32. With this CL they will be ignored on aarch64 also. Differential revision: http://reviews.llvm.org/D8776 llvm-svn: 234307
* Remove "virtual" and add "override" to all functions that are overridden to ↵Greg Clayton2015-03-121-42/+42
| | | | | | quiet warnings. llvm-svn: 231990
* Correctly resolve symbol names containing linker annotationsPavel Labath2015-03-041-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: Symbols in ELF files can be versioned, but LLDB currently does not understand these. This problem becomes apparent once one loads glibc with debug info. Here (in the .symtab section) the versions are embedded in the name (name@VERSION), which causes issues when evaluating expressions referencing memcpy for example (current glibc contains memcpy@@GLIBC_2.14 and memcpy@GLIBC_2.2.5). This problem was not evident without debug symbols as the .dynsym section stores the bare names and the actual versions are present in a separate section (.gnu.version_d), which LLDB ignores. This resulted in two definitions of memcpy in the symbol table. This patch adds support for storing annotated names to the Symbol class. If Symbol.m_contains_linker_annotations is true then this symbol is annotated. Unannotated name can be obtained by calling StripLinkerAnnotations on the corresponding ObjectFile. ObjectFileELF implements this to strip @VERSION suffixes when requested. Symtab uses this function to add the bare name as well as the annotated name to the name lookup table. To preserve the size of the Symbol class, I had to steal one bit from the m_type field. Test Plan: This fixes TestExprHelpExamples.py when run with a glibc with debug symbols. Writing an environment agnostic test case would require building a custom shared library with symbol versions and testing symbol resolution against that, which is somewhat challenging. Reviewers: clayborg, jingham Subscribers: lldb-commits Differential Revision: http://reviews.llvm.org/D8036 llvm-svn: 231228
* ELF: store the thumbness of a function in symbol flags.Todd Fiala2014-09-151-0/+3
| | | | | | | | | | | | This allows us to fixup the address of the symbol as soon as we parse it so that lldb is not confused thinking there are two different symbols in the binary (one with the thumb bit, one without). Also, differentiating between THUMB and ARM symbols allows the debugger to place the right type of breakpoint. Change by Stephane Sezer. llvm-svn: 217841
* Fix ObjectFileELF to determine architectures independent of host.Todd Fiala2014-06-271-2/+10
| | | | | | | | | | | | | | | | | | Previously ObjectFileELF was simplifying and assuming the object file it was looking at was the same as the host architecture/triple. This would break attempts to run, say, lldb on MacOSX against lldb-gdbserver on Linux since the MacOSX lldb would say that the linux elf file was really an Apple MacOSX architecture. Chaos would ensue. This change allows the elf file to parse ELF notes for Linux, FreeBSD and NetBSD, and determine the OS appropriately from them. It also initializes the OS type from the ELF header OSABI if it is set (which it is for FreeBSD but not for Linux). Added a test with freebsd and linux images that verify that '(lldb) image list -t -A' prints out the expected architecture for each. llvm-svn: 211907
* Improve Elf object file UUID calculation performance.Todd Fiala2014-03-251-0/+12
| | | | | | | | | | | This change makes significant improvements in the performance of calculating a UUID within ObjectFileELF, and handles both running processes and core files correctly. This does lazy evaluation of UUID generation and caches the result when calculated. Change by Piotr Rak. llvm-svn: 204749
* Add support for JIT debugging on Linux using the GDB JIT interface. Patch ↵Andrew MacPherson2014-03-051-0/+31
| | | | | | written with Keno Fischer. llvm-svn: 202956
* Modified ObjectFile::SetLoadAddress() to now be:Greg Clayton2014-02-071-1/+3
| | | | | | | | | | | | | | ObjectFile::SetLoadAddress (Target &target, lldb::addr_t value, bool value_is_offset); Now "value" is a slide if "value_is_offset" is true, and "value" is an image base address otherwise. All previous usage of this API was using slides. Updated the ObjectFileELF and ObjectFileMachO SetLoadAddress methods to do the right thing. Also updated the ObjectFileMachO::SetLoadAddress() function to not load __LINKEDIT when it isn't needed and to only load sections that belong to the executable object file. llvm-svn: 201003
* Factor some methods that were in DynamicLoaderPOSIXDYLD.Steve Pucci2014-02-061-0/+3
| | | | | | | | | | | | | | | Move some code that was in DynamicLoaderPOSIXDLYD into the base class DynamicLoader. In the case of UpdateLoadedSections(), the test to see whether a file is loadable (its address is zero) is not generally applicable so that test is changed to a more universally applicable check for the SHF_ALLOC flag on the section. Also make it explicit that the reading of the module_id in DynamicLoaderPOSIXDYLD::GetThreadLocalData() is using a hardcoded size (of module_id) of 4, which might not be appropriate on big-endian 64-bit systems, leaving a FIXME comment in place. llvm-svn: 200939
* elf: Move elf note parsing to ObjectFileELF.cppEd Maste2013-12-021-0/+28
| | | | | | | | | Separate ELF note implementations were introduced for core files and GNU build-id. Move the more general one from elf-core to ObjectFileELF and use it for build-id as well. Review: http://llvm-reviews.chandlerc.com/D1902 llvm-svn: 196125
* Simplify indirect rld_map for mips (rework r192408).Ed Maste2013-10-111-1/+1
| | | | | | | | | Just pass a Target* into ObjectFileELF::GetImageInfoAddress so that it can do the extra dereference necessary on MIPS, instead of passing a flag back to the caller. Review: http://llvm-reviews.chandlerc.com/D1899 llvm-svn: 192469
* Support mips shared object debug infoEd Maste2013-10-111-1/+1
| | | | | | | | | | MIPS's .dyanamic section is read-only. Instead of using DT_DEBUG for the pointer to dyld information it uses a separate tag DT_MIPS_RLD_MAP which points to storage in the read-write .rld_map section, which in turn points to the dyld information. Review: http://llvm-reviews.chandlerc.com/D1890 llvm-svn: 192408
* Adds an option to resolve a symbol from an address that can be usedAshok Thirumurthi2013-09-241-0/+3
| | | | | | | | | | | | | | | | | to build out the symbol table as addresses are used, and implements the mechanism for ELF to add stripped symbols from eh_frame. Uses this mechanism to allow disassembly for addresses corresponding to stripped symbols for ELF, and provide hooks to implement this for PE COFF. Also removes eSymbolContextTailCall in favor of an option for ResolveSymbolContextForAddress for consistency with the documentation for eSymbolContextEverything. Essentially, this is just an option for interpreting the so_addr. llvm-svn: 191307
* Adds methods to ObjectFileELF to access data in ELF segmentsAshok Thirumurthi2013-07-111-0/+12
| | | | | | | | in preparation to add support for ELF core files. Patch by Samuel Jacob! llvm-svn: 186114
* Cleanup on the unified section list changes. Main changes are:Greg Clayton2013-07-101-16/+8
| | | | | | | | | | | | | | | - ObjectFile::GetSymtab() and ObjectFile::ClearSymtab() no longer takes any flags - Module coordinates with the object files and contain a unified section list so that object file and symbol file can share sections when they need to, yet contain their own sections. Other cleanups: - Fixed Symbol::GetByteSize() to not have the symbol table compute the byte sizes on the fly - Modified the ObjectFileMachO class to compute symbol sizes all at once efficiently - Modified the Symtab class to store a file address lookup table for more efficient lookups - Removed Section::Finalize() and SectionList::Finalize() as they did nothing - Improved performance of the detection of symbol files that have debug maps by excluding stripped files and core files, debug files, object files and stubs - Added the ability to tell if an ObjectFile has been stripped with ObjectFile::IsStripped() (used this for the above performance improvement) llvm-svn: 185990
* Split symbol support for ELF and Linux.Michael Sartain2013-07-011-18/+35
| | | | llvm-svn: 185366
* ObjectFileELF::GetModuleSpecifications on Linux should work now.Michael Sartain2013-05-231-0/+4
| | | | | | | Which means "platform process list" should work and list the architecture. We are now parsing the elf build-id if it exists, which should allow us to load stripped symbols (looking at that next). llvm-svn: 182610
* Implement ObjectFileELF::GetModuleSpecifications(), and add PlatformLinux ↵Michael Sartain2013-05-171-0/+6
| | | | | | | code to deal with unknown arch properties. CR: Greg Clayton llvm-svn: 182065
* <rdar://problem/13854277>Greg Clayton2013-05-101-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | <rdar://problem/13594769> Main changes in this patch include: - cleanup plug-in interface and use ConstStrings for plug-in names - Modfiied the BSD Archive plug-in to be able to pick out the correct .o file when .a files contain multiple .o files with the same name by using the timestamp - Modified SymbolFileDWARFDebugMap to properly verify the timestamp on .o files it loads to ensure we don't load updated .o files and cause problems when debugging The plug-in interface changes: Modified the lldb_private::PluginInterface class that all plug-ins inherit from: Changed: virtual const char * GetPluginName() = 0; To: virtual ConstString GetPluginName() = 0; Removed: virtual const char * GetShortPluginName() = 0; - Fixed up all plug-in to adhere to the new interface and to return lldb_private::ConstString values for the plug-in names. - Fixed all plug-ins to return simple names with no prefixes. Some plug-ins had prefixes and most ones didn't, so now they all don't have prefixed names, just simple names like "linux", "gdb-remote", etc. llvm-svn: 181631
* Added the ability to extract a ModuleSpecList (a new class) from an ↵Greg Clayton2013-04-241-0/+7
| | | | | | | | | | | | | | | | | ObjectFile. This is designed to be used when you have an object file that contains one or more architectures (MacOSX universal (fat) files) and/or one or more objects (BSD archive (.a files)). There is a new static ObjectFile function you can call: size_t ObjectFile::GetModuleSpecifications (const FileSpec &file, lldb::offset_t file_offset, ModuleSpecList &specs) This will fill in "specs" which the details of all the module specs (file + arch + UUID (if there is one) + object name (for BSD archive objects eventually) + file offset to the object in question). This helps us when a user specifies a file that contains a single architecture, and also helps us when we are given a debug symbol file (like a dSYM file on MacOSX) that contains one or more architectures and we need to be able to match it up to an existing Module that has no debug info. llvm-svn: 180224
* After discussing with Chris Lattner, we require C++11, so lets get rid of ↵Greg Clayton2013-04-181-1/+1
| | | | | | the macros and just use C++11. llvm-svn: 179805
* Since we use C++11, we should switch over to using std::unique_ptr when ↵Greg Clayton2013-04-181-1/+1
| | | | | | | | C++11 is being used. To do this, we follow what we have done for shared pointers and we define a STD_UNIQUE_PTR macro that can be used and it will "do the right thing". Due to some API differences in std::unique_ptr and due to the fact that we need to be able to compile without C++11, we can't use move semantics so some code needed to change so that it can compile with either C++. Anyone wanting to use a unique_ptr or auto_ptr should now use the "STD_UNIQUE_PTR(TYPE)" macro. llvm-svn: 179779
* <rdar://problem/13338643>Greg Clayton2013-03-041-6/+0
| | | | | | | | | | | | | | | | DWARF with .o files now uses 40-60% less memory! Big fixes include: - Change line table internal representation to contain "file addresses". Since each line table is owned by a compile unit that is owned by a module, it makes address translation into lldb_private::Address easy to do when needed. - Removed linked address members/methods from lldb_private::Section and lldb_private::Address - lldb_private::LineTable can now relink itself using a FileRangeMap to make it easier to re-link line tables in the future - Added ObjectFile::ClearSymtab() so that we can get rid of the object file symbol tables after we parse them once since they are not needed and kept memory allocated for no reason - Moved the m_sections_ap (std::auto_ptr to section list) and m_symtab_ap (std::auto_ptr to the lldb_private::Symtab) out of each of the ObjectFile subclasses and put it into lldb_private::ObjectFile. - Changed how the debug map is parsed and stored to be able to: - Lazily parse the debug map for each object file - not require the address map for a .o file until debug information is linked for a .o file llvm-svn: 176454
* <rdar://problem/13159777> Greg Clayton2013-02-061-6/+8
| | | | | | | | | | | | | | lldb was mmap'ing archive files once per .o file it loads, now it correctly shares the archive between modules. LLDB was also always mapping entire contents of universal mach-o files, now it maps just the slice that is required. Added a new logging channel for "lldb" called "mmap" to help track future regressions. Modified the ObjectFile and ObjectContainer plugin interfaces to take a data offset along with the file offset and size so we can implement the correct caching and efficient reading of parts of files without mmap'ing the entire file like we used to. The current implementation still keeps entire .a files mmaped (once) and entire slices from universal files mmaped to ensure that if a client builds their binaries during a debug session we don't lose our data and get corrupt object file info and debug info. llvm-svn: 174524
* <rdar://problem/13069948>Greg Clayton2013-01-251-4/+4
| | | | | | | | | | | | Major fixed to allow reading files that are over 4GB. The main problems were that the DataExtractor was using 32 bit offsets as a data cursor, and since we mmap all of our object files we could run into cases where if we had a very large core file that was over 4GB, we were running into the 4GB boundary. So I defined a new "lldb::offset_t" which should be used for all file offsets. After making this change, I enabled warnings for data loss and for enexpected implicit conversions temporarily and found a ton of things that I fixed. Any functions that take an index internally, should use "size_t" for any indexes and also should return "size_t" for any sizes of collections. llvm-svn: 173463
* <rdar://problem/10103468>Greg Clayton2012-02-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | I started work on being able to add symbol files after a debug session had started with a new "target symfile add" command and quickly ran into problems with stale Address objects in breakpoint locations that had lldb_private::Section pointers into modules that had been removed or replaced. This also let to grabbing stale modules from those sections. So I needed to thread harded the Address, Section and related objects. To do this I modified the ModuleChild class to now require a ModuleSP on initialization so that a weak reference can created. I also changed all places that were handing out "Section *" to have them hand out SectionSP. All ObjectFile, SymbolFile and SymbolVendors were inheriting from ModuleChild so all of the find plug-in, static creation function and constructors now require ModuleSP references instead of Module *. Address objects now have weak references to their sections which can safely go stale when a module gets destructed. This checkin doesn't complete the "target symfile add" command, but it does get us a lot clioser to being able to do such things without a high risk of crashing or memory corruption. llvm-svn: 151336
* <rdar://problem/10560053>Greg Clayton2012-02-051-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixed "target modules list" (aliased to "image list") to output more information by default. Modified the "target modules list" to have a few new options: "--header" or "-h" => show the image header address "--offset" or "-o" => show the image header address offset from the address in the file (the slide applied to the shared library) Removed the "--symfile-basename" or "-S" option, and repurposed it to "--symfile-unique" "-S" which will show the symbol file if it differs from the executable file. ObjectFile's can now be loaded from memory for cases where we don't have the files cached locally in an SDK or net mounted root. ObjectFileMachO can now read mach files from memory. Moved the section data reading code into the ObjectFile so that the object file can get the section data from Process memory if the file is only in memory. lldb_private::Module can now load its object file in a target with a rigid slide (very common operation for most dynamic linkers) by using: bool Module::SetLoadAddress (Target &target, lldb::addr_t offset, bool &changed) lldb::SBModule() now has a new constructor in the public interface: SBModule::SBModule (lldb::SBProcess &process, lldb::addr_t header_addr); This will find an appropriate ObjectFile plug-in to load an image from memory where the object file header is at "header_addr". llvm-svn: 149804
* Added the ability to get an abstract file type (executable, object file, Greg Clayton2011-07-091-0/+6
| | | | | | | | shared library, etc) and strata (user/kernel) from an object file. This will help with plug-in and platform selection when given a new binary with the "target create <file>" command. llvm-svn: 134779
* elf: synthesize symbols for PLT entriesStephen Wilson2011-03-301-3/+42
| | | | | | | | | | | When populating symbol tables ObjectFileELF now generates a set of synthetic trampoline symbols. These new symbols correspond to entries in the program linkage table and have a (possibly mangled) name identifying the corresponding symbol in some DSO. These symbols will be used by the DynamicLoader loader plugin on Linux to provide thread plans when execution flows from one DSO to another. llvm-svn: 128550
* LLDB now has "Platform" plug-ins. Platform plug-ins are plug-ins that provideGreg Clayton2011-03-081-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | an interface to a local or remote debugging platform. By default each host OS that supports LLDB should be registering a "default" platform that will be used unless a new platform is selected. Platforms are responsible for things such as: - getting process information by name or by processs ID - finding platform files. This is useful for remote debugging where there is an SDK with files that might already or need to be cached for debug access. - getting a list of platform supported architectures in the exact order they should be selected. This helps the native x86 platform on MacOSX select the correct x86_64/i386 slice from universal binaries. - Connect to remote platforms for remote debugging - Resolving an executable including finding an executable inside platform specific bundles (macosx uses .app bundles that contain files) and also selecting the appropriate slice of universal files for a given platform. So by default there is always a local platform, but remote platforms can be connected to. I will soon be adding a new "platform" command that will support the following commands: (lldb) platform connect --name machine1 macosx connect://host:port Connected to "machine1" platform. (lldb) platform disconnect macosx This allows LLDB to be well setup to do remote debugging and also once connected process listing and finding for things like: (lldb) process attach --name x<TAB> The currently selected platform plug-in can now auto complete any available processes that start with "x". The responsibilities for the platform plug-in will soon grow and expand. llvm-svn: 127286
* I didn't notice there was already an ObjectFile::GetEntryPoint. Move that ↵Jim Ingham2011-03-081-3/+0
| | | | | | over to GetEntryPointAddress 'cause that's more consistent with other functions in ObjectFile, do the mutatis mutandi and also in the ELF case I return a section offset address rather than a bare load address. llvm-svn: 127205
* Add a method "GetEntryPoint" to the ObjectFile class, and implement it on ↵Jim Ingham2011-03-071-0/+6
| | | | | | MachO & ELF - though the ELF implementation is probably a little weak. Then use this method in place of directly looking for "start" in the ThreadPlanCallFunction constructor to find the stopping point for our function evaluation. llvm-svn: 127194
* linux: Remove a local ObjectFileELF version of GetArchitecture.Stephen Wilson2011-02-241-3/+0
| | | | | | | | | Also fix a bug where we were not lazily parsing the ELF header and thus returning an ArchSpec with invalid cpu type components. Initialize the cpu subtype as LLDB_INVALID_CPUTYPE for compatibility with the new ArchSpec implementation. llvm-svn: 126405
* Made lldb_private::ArchSpec contain much more than just an architecture. ItGreg Clayton2011-02-151-1/+1
| | | | | | | | | | now, in addition to cpu type/subtype and architecture flavor, contains: - byte order (big endian, little endian) - address size in bytes - llvm::Triple for true target triple support and for more powerful plug-in selection. llvm-svn: 125602
* Moved FileSpec into the Host layer since it will vary from host to host.Greg Clayton2011-02-081-1/+1
| | | | | | We have a common unix implementation in lldb/source/Host/common/FileSpec.cpp. llvm-svn: 125078
* Implement GetEntryPoint, GetImageInfoAddress and GetArchitecture for ↵Stephen Wilson2011-01-151-0/+9
| | | | | | ObjectFileELF. llvm-svn: 123496
* Spelling changes applied from lldb_spelling.diffs from Bruce Mitchener.Greg Clayton2011-01-081-1/+1
| | | | | | Thanks Bruce! llvm-svn: 123083
* Change Target & Process so they can really be initialized with an invalid ↵Jim Ingham2010-08-091-0/+3
| | | | | | | | | | | | architecture. Arrange that this then gets properly set on attach, or when a "file" is set. Add a completer for "process attach -n". Caveats: there isn't currently a way to handle multiple processes with the same name. That will have to wait on a way to pass annotations along with the completion strings. llvm-svn: 110624
* Combine 32 and 64 bit ELF readers.Stephen Wilson2010-07-131-86/+139
| | | | | | | This patch provides a generic ELF reader plugin to handle both 32 and 64 bit formats. llvm-svn: 108292
* Initial checkin of lldb code from internal Apple repo.Chris Lattner2010-06-081-0/+197
llvm-svn: 105619
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