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* Add ReadCStringFromMemory for faster string readsAntonio Afonso2019-06-185-7/+136
| | | | | | | | | | | | | | | | | | | | | | | Summary: This is the fifth patch to improve module loading in a series that started here (where I explain the motivation and solution): D62499 Reading strings with ReadMemory is really slow when reading the path of the shared library. This is because we don't know the length of the path so use PATH_MAX (4096) and these strings are actually super close to the boundary of an unreadable page. So even though we use process_vm_readv it will usually fail because the read size spans to the unreadable page and we then default to read the string word by word with ptrace. This new function is very similar to another ReadCStringFromMemory that already exists in lldb that makes sure it never reads cross page boundaries and checks if we already read the entire string by finding '\0'. I was able to reduce the GetLoadedSharedLibraries call from 30ms to 4ms (or something of that order). Reviewers: clayborg, xiaobai, labath Reviewed By: labath Subscribers: emaste, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D62503 llvm-svn: 363750
* Implement xfer:libraries-svr4:read packetAntonio Afonso2019-06-1816-4/+362
| | | | | | | | | | | | | | | | | | | Summary: This is the fourth patch to improve module loading in a series that started here (where I explain the motivation and solution): D62499 Implement the `xfer:libraries-svr4` packet by adding a new function that generates the list and then in Handle_xfer I generate the XML for it. The XML is really simple so I'm just using string concatenation because I believe it's more readable than having to deal with a DOM api. Reviewers: clayborg, xiaobai, labath Reviewed By: labath Subscribers: emaste, mgorny, srhines, krytarowski, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D62502 llvm-svn: 363707
* [Reproducers] Make reproducer relocatableJonas Devlieghere2019-06-187-11/+32
| | | | | | | | | | | | | | Before this patch, reproducers weren't relocatable. The reproducer contained hard coded paths in the VFS mapping, as well in the yaml file listing the different input files for the command interpreter. This patch changes that: - Use relative paths for the DataCollector. - Use an overlay prefix for the FileCollector. Differential revision: https://reviews.llvm.org/D63467 llvm-svn: 363697
* Fix windows build for r363357Pavel Labath2019-06-181-5/+1
| | | | | | | | MSVC has trouble referencing the protected Compare class from from the friend Entry operator<. Just delete that operator, as it's used only once. llvm-svn: 363653
* Add color to the default thread and frame format.Jonas Devlieghere2019-06-173-14/+21
| | | | | | | | | | | | | | Now that we correctly ignore ASCII escape sequences when colors are disabled (r362240), I'd like to change the default frame and thread format to include color in their output, in line with the syntax highlighting that Raphael added a while ago. This patch adds highlighting for the stop reason, the file, line and column number. With colors disabled, this of course is a no-op. Differential revision: https://reviews.llvm.org/D62743 llvm-svn: 363608
* [lldb] [test] Extend D55859 symbols.enable-external-lookup=false for more ↵Jan Kratochvil2019-06-1716-6/+48
| | | | | | | | | | | | | | | | | | | | | | testcases D55859 <https://reviews.llvm.org/D55859> has no effect for some of the testcases so this patch extends it even for (all?) other testcases known to me. LLDB was failing when LLDB prints errors reading system debug infos (`*-debuginfo.rpm`, DWZ-optimized) which should never happen as LLDB testcases should not be affected by system debug infos. `lldb/packages/Python/lldbsuite/test/api/multithreaded/driver.cpp.template` is using only SB API which does not expose `ModuleList` so I had to call `HandleCommand()` there. `lldb-test.cpp` could also use `HandleCommand` and then there would be no need for `ModuleListProperties::SetEnableExternalLookup()` but I think it is cleaner with API and not on based on text commands. Differential Revision: https://reviews.llvm.org/D63339 llvm-svn: 363567
* [lldb] [test] Watchpoint tests can be always run as root on NetBSDMichal Gorny2019-06-171-0/+2
| | | | llvm-svn: 363551
* [lldb] [test] Skip watchpoint tests on NetBSD if userdbregs is disabledMichal Gorny2019-06-171-0/+25
| | | | | | | | | | | Skip watchpoint tests if security.models.extensions.user_set_dbregs is disabled. This indicates that unprivileged processes are not allowed to write to debug registers which is a prerequisite for using hardware watchpoints. Differential Revision: https://reviews.llvm.org/D63380 llvm-svn: 363536
* DWARF: Avoid storing DIERefs in long-lived containersPavel Labath2019-06-174-51/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | Summary: A user_id_t carries the same information as a DIERef, but it takes up less space. Furthermore, DIERef::operator<'s implementation is very questionable, as it does not take the cu_offset and section fields into account. Using just the die offset was correct in the days when all debug info lived in a single section, but since we started supporting DWO debug info, this was no longer true. The comparison operator could be fixed, but it seems like using the user_id_t for these purposes is a better idea overall. I think this did not cause any bugs, because the only place the comparison operator was used is in m_function_scope_qualified_name_map, and this one is local to a dwo file, but I am not 100% sure of that. Reviewers: clayborg, JDevlieghere Subscribers: aprantl, lldb-commits Differential Revision: https://reviews.llvm.org/D63322 llvm-svn: 363528
* Implement GetSharedLibraryInfoAddressAntonio Afonso2019-06-1410-167/+487
| | | | | | | | | | | | | | | | | | | | | Summary: This is the third patch to improve module loading in a series that started here (where I explain the motivation and solution): D62499 Add functions to read the r_debug location to know where the linked list of loaded libraries are so I can generate the `xfer:libraries-svr4` packet. I'm also using this function to implement `GetSharedLibraryInfoAddress` that was "not implemented" for linux. Most of this code was inspired by the current ds2 implementation here: https://github.com/facebook/ds2/blob/master/Sources/Target/POSIX/ELFProcess.cpp. Reviewers: clayborg, xiaobai, labath Reviewed By: clayborg, labath Subscribers: emaste, krytarowski, mgorny, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D62501 llvm-svn: 363458
* Don't try to parse ObjC method if CU isn't ObjCGreg Clayton2019-06-141-20/+24
| | | | | | | | Improve manual indexing performance when indexing non objective C code. Differential Revision: https://reviews.llvm.org/D63171 llvm-svn: 363441
* Remove stale comment and disabled code (NFC)Jonas Devlieghere2019-06-141-19/+0
| | | | llvm-svn: 363438
* Python 3: decode string as utf-8 to avoid type mismatch.Adrian Prantl2019-06-141-5/+5
| | | | | | | | rdar://problem/51464644 Differential Revision: https://reviews.llvm.org/D63311 llvm-svn: 363413
* Make crashlog.py less noisyAdrian Prantl2019-06-141-9/+27
| | | | | | | | | | | For end-users there is no point in printing dSYM load errors for system frameworks, since they will all fail and there's nothing they can do about it. This patch hides them by default and shows them when --verbose is present. Differential Revision: https://reviews.llvm.org/D63310 llvm-svn: 363412
* EditlineTest: Improve error messagePavel Labath2019-06-142-8/+7
| | | | | | | | | | This test seems to occasionally fail because editline returns a different number of lines. Rewrite the message in such a way that we also see the actual lines when that happens (and not just their count). Also, clean up the dependencies of the test while I'm in there. llvm-svn: 363404
* DWARF: port debug_ranges/rnglists over to DWARFContextPavel Labath2019-06-146-37/+35
| | | | llvm-svn: 363400
* DWARF: Remove unused includes from DWARFDebugAranges.h/cppPavel Labath2019-06-142-15/+3
| | | | llvm-svn: 363382
* Have DWARFUnit store a *reference* to SymbolFileDWARFPavel Labath2019-06-1417-119/+86
| | | | | | | | | | | | Previously it was storing a *pointer*, which left open the possibility of this pointer being null. We never made use of that possibility (it does not make sense), and most of the code was already assuming that. However, there were a couple of null-checks scattered around the code. This patch replaces the reference with a pointer, making the non-null-ness explicit, and removes the remaining null-checks. llvm-svn: 363381
* DWARFIndex: s/ReportInvalidDIEOffset/ReportInvalidDIERefPavel Labath2019-06-147-27/+17
| | | | | | | | | | | | In a dwo/debug_types world, the die offset is not enough to uniquely idendify a debug info entry. Pass the the entire DIERef object instead. This is technically NFC, because only AppleIndex implemented this method (and there, the die offset *is* enough for unique identification). However, this makes the code simpler, and simplifies some of the follow-up patches. llvm-svn: 363373
* [C++20] add Basic consteval specifierGauthier Harnisch2019-06-142-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | Summary: this revision adds Lexing, Parsing and Basic Semantic for the consteval specifier as specified by http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1073r3.html with this patch, the consteval specifier is treated as constexpr but can only be applied to function declaration. Changes: - add the consteval keyword. - add parsing of consteval specifier for normal declarations and lambdas expressions. - add the whether a declaration is constexpr is now represented by and enum everywhere except for variable because they can't be consteval. - adapt diagnostic about constexpr to print constexpr or consteval depending on the case. - add tests for basic semantic. Reviewers: rsmith, martong, shafik Reviewed By: rsmith Subscribers: eraman, efriedma, rnkovacs, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D61790 llvm-svn: 363362
* Make UniqueCStringMap work with non-default-constructible types and other ↵Pavel Labath2019-06-145-101/+114
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | improvements/cleanups Summary: The motivation for this was me wanting to make the validity of dwarf DIERefs explicit (via llvm::Optional<DIERef>). This meant that the class would no longer have a default constructor. As the DIERef was being stored in a UniqueCStringMap, this meant that this container (like all standard containers) needed to work with non-default-constructible types too. This part is achieved by removing the default constructors for the map entry types, and providing appropriate comparison overloads so that we can search for map entries without constructing a dummy entry. While doing that, I took the opportunity to modernize the code, and add some tests. Functions that were completely unused are deleted. This required also some changes in the Symtab code, as it was default constructing map entries, which was not impossible even though its value type was default-constructible. Technically, these changes could be avoided with some SFINAE on the entry type, but I felt that the code is cleaner this way anyway. Reviewers: JDevlieghere, sgraenitz Subscribers: mgorny, aprantl, lldb-commits Differential Revision: https://reviews.llvm.org/D63268 llvm-svn: 363357
* Fixed typos in Log.hJonas Devlieghere2019-06-141-2/+2
| | | | | | | | Patch by: Yuya Fujita Differential revision: https://reviews.llvm.org/D63241 llvm-svn: 363356
* [NFC] Replace a plugin header with a non-plugin headerAlex Langford2019-06-131-1/+1
| | | | llvm-svn: 363338
* [CMake] Fix generated Xcode-project ignoring output directory setting for ↵Stefan Granitz2019-06-131-0/+6
| | | | | | | | | LLDB.framework Other generators honor the `LIBRARY_OUTPUT_DIRECTORY` target property, but apparently Xcode doesn't. So we call `set_output_directory()` as `llvm_add_library()` would do and this works. Note that `LIBRARY_OUTPUT_DIRECTORY` is still necessary, because it's used to store and read the target's absolute build directory (while `LLDB_FRAMEWORK_BUILD_DIR` is relative!). llvm-svn: 363280
* [CMake] Fix lldb-dotest for single-config generators in standalone buildsStefan Granitz2019-06-131-1/+5
| | | | | | Differential Revision: https://reviews.llvm.org/D62859 llvm-svn: 363279
* [CMake] Add fallbacks for copying clang-resource-headers to LLDB.framework ↵Stefan Granitz2019-06-131-3/+25
| | | | | | in standalone builds llvm-svn: 363271
* DWARF: Don't create lldb CompileUnits for DWARF type unitsPavel Labath2019-06-1313-199/+355
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: Type units don't represent actual compilations and a lot of the operations that we do with lldb compile units (getting their line tables, variables, etc.) don't make sense for them. There is also a lot more of them (sometimes over 100x), so making them more lightweight pays off. The main change in this patch is that we stop creating lldb CompileUnits for DWARF type units. The trickiest part here is that the SymbolFile interface requires that we assign consecutive sequence IDs to the compile units we create. As DWARF type and compile units can come in any order (in v5), this means we can no longer use 1-1 mapping between DWARF and lldb compile units. Instead I build a translation table between the two indices. To avoid pessimizing the case where there are no type units, I build the translation table only in case we have at least one type unit. Additionaly, I also tried to strenghted type safete by replacing DWARFUnit with DWARFCompileUnit where applicable. Though that was not stricly necessary, I found it a good way to ensure that the transformations I am doing here make sense. In the places where I was changing the function signatures, and where it was obvious that the objects being handled were not null, I also replaced pointers with references. There shouldn't be any major functional change with this patch. The only change I observed is that now the types in the type units will not be parsed when one calls Module::ParseAllDebugSymbols, unless they are referenced from other compile units. This makes sense, given how ParseAllDebugSymbols is implemented (it iterates over all compile units), and it only matters for one hand-writted test where I did not bother to reference the types from the compile units (which I now do). Reviewers: clayborg, JDevlieghere, aprantl Subscribers: jdoerfert, lldb-commits Differential Revision: https://reviews.llvm.org/D63005 llvm-svn: 363250
* [Reproducers] Remove call to lldb_private::GetVersion()Jonas Devlieghere2019-06-131-2/+1
| | | | | | | | Utility doesn't link against lldbBase so we cannot call GetVersion in keep. I already added a string member m_version to deal with that, but the call was still there. llvm-svn: 363228
* [Reproducers] Include lldb version in the reproducer rootJonas Devlieghere2019-06-134-5/+43
| | | | | | | | | | | Generally, reproducers are rev-locked to the version of LLDB, so it's valuable to have the LLDB version in the reproducer. For now I just want the information to be present, without enforcing it, but I envision emitting a warning during replay in the future. Differential revision: https://reviews.llvm.org/D63229 llvm-svn: 363225
* [Reproducers] Simplify providers with nested Info struct (NFC)Jonas Devlieghere2019-06-128-52/+41
| | | | | | | | | This replaces the `info` typedef with a nested struct named Info. This means we now have FooProvider and FooProvider::Info, instead of two related but separate classes FooProvider and FooInfo. This change is mostly cosmetic. llvm-svn: 363211
* Re-land r363103 ("When reading ObjC class table, use new SPI if it is avail")Jason Molenda2019-06-121-4/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | with a call to snprintf() to find the size of the formatted string, malloc memory, then snprintf again to format it into the buffer, instead of calling asprintf. Orig commit msg: When reading ObjC class table, use new SPI if it is avail In the latest OS betas, the objc runtime has a special interface for the debugger, class_getNameRaw(), instead of the existing class_getName(), which will return class names in their raw, unmangled (in the case of swift) form. When lldb can access the unmangled names of classes, it won't need to fetch them out of the inferior process after we run our "get the objc class table" expression. If the new interface is absent (debugging a process on an older target), lldb will fall back to class_getName and reading any class names that it got back in demangled form, at a bit of a performance cost on the first expression. <rdar://problem/50688054> llvm-svn: 363206
* Skip failing test on older versions of clang.Adrian Prantl2019-06-121-0/+1
| | | | llvm-svn: 363202
* [Expression] Add PersistentExpressionState::GetCompilerTypeFromPersistentDeclAlex Langford2019-06-126-36/+93
| | | | | | | | | | | | | | | | Summary: PersistentStateExpressions (e.g. ClangPersistentVariables) have the ability to define types using expressions that persist throughout the debugging session. GetCompilerTypeFromPersistentDecl is a useful operation to have if you need to use any of those persistently declared types, like in CommandObjectMemory. This decouples clang from CommandObjectMemory and decouples Plugins from Commands in general. Differential Revision: https://reviews.llvm.org/D62797 llvm-svn: 363183
* [lldb] Ignore null frames in lldb.macosx crashlogStefan Granitz2019-06-121-0/+4
| | | | llvm-svn: 363172
* [CMake] Two extra FOLDER properties for debugserverStefan Granitz2019-06-121-0/+4
| | | | llvm-svn: 363171
* Recognise debug_types.dwo as a debug info sectionPavel Labath2019-06-126-0/+13
| | | | | | This is a preparatory patch to allow reading type units from dwo files. llvm-svn: 363146
* DWARF: Share line tables of type unitsPavel Labath2019-06-1212-105/+480
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: This patch creates a cache of file lists in line tables referenced by type units. This cache is used to avoid parsing a line table twice (since a file list will generally be shared by many type units). It also sets things up in a way that parsing of DW_AT_decl_file attributes will keep working even when we stop creating lldb compile units for dwarf type units, but it stops short of actually doing that. This means that the request for files now go directly to SymbolFileDWARF instead of being routed there indirectly via the lldb_private::CompileUnit class. As a result of this, a number of occurences of SymbolContext variables in DWARFASTParserClang have become unused, so I remove them. This patch reduces the number of times a file list is being parsed, but the situation is still suboptimal, as the parsed list is being copied multiple times. This will be fixed when we stop creating CompileUnits for DWARF type units. Reviewers: clayborg, aprantl, JDevlieghere Subscribers: jdoerfert, lldb-commits Differential Revision: https://reviews.llvm.org/D62894 llvm-svn: 363143
* [LLDB] Fix FreeBSD buildDavid Carlier2019-06-121-1/+1
| | | | | | | | | | | | The auxiliary vector method had the wrong signature. Reviewers: MaskRay, teemperor, aadsm Reviewed By: MaskRay, teemperor Differential Revision: https://reviews.llvm.org/D63187 llvm-svn: 363135
* Back out r363103 ("When reading ObjC class table, use new SPI if it is avail")Jason Molenda2019-06-121-50/+4
| | | | | | because it breaks the windows bot - asprintf() is not available. llvm-svn: 363115
* [LanguageRuntime] Simplify CreateExceptionSearchFilter in derived classesAlex Langford2019-06-114-12/+7
| | | | llvm-svn: 363109
* When reading ObjC class table, use new SPI if it is availJason Molenda2019-06-111-4/+50
| | | | | | | | | | | | | | | | | | In the latest OS betas, the objc runtime has a special interface for the debugger, class_getNameRaw(), instead of the existing class_getName(), which will return class names in their raw, unmangled (in the case of swift) form. When lldb can access the unmangled names of classes, it won't need to fetch them out of the inferior process after we run our "get the objc class table" expression. If the new interface is absent (debugging a process on an older target), lldb will fall back to class_getName and reading any class names that it got back in demangled form, at a bit of a performance cost on the first expression. <rdar://problem/50688054> llvm-svn: 363103
* Update AuxVector.cppJason Molenda2019-06-111-6/+4
| | | | llvm-svn: 363102
* Fix a crash in option parsing.Adrian Prantl2019-06-113-0/+9
| | | | | | | | | | | The call to getopt_long didn't handle the case where the *last* option had an argument missing. <rdar://problem/51231882> Differential Revision: https://reviews.llvm.org/D63110 llvm-svn: 363101
* Add support to read aux vector valuesAntonio Afonso2019-06-1118-206/+149
| | | | | | | | | | | | | | | | | | | | Summary: This is the second patch to improve module loading in a series that started here (where I explain the motivation and solution): https://reviews.llvm.org/D62499 I need to read the aux vector to know where the r_debug map with the loaded libraries are. The AuxVector class was made generic so it could be reused between the POSIX-DYLD plugin and NativeProcess*. The class itself ended up in the ProcessUtility plugin. Reviewers: clayborg, xiaobai, labath, JDevlieghere Reviewed By: clayborg, labath, JDevlieghere Subscribers: emaste, JDevlieghere, mgorny, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D62500 llvm-svn: 363098
* [Target] Use llvm::scope_exit to restore m_suppress_stop_hooks value.Tatyana Krasnukha2019-06-101-4/+5
| | | | llvm-svn: 362985
* [Target][NFC] Rename GetCPPLanguageRuntime to GetAlex Langford2019-06-102-3/+2
| | | | | | | This is a followup to rL362981, in which I moved GetObjCLanguageRuntime from Process to ObjCLanguageRuntime, renaming it to Get along the way. llvm-svn: 362984
* Create a generic handler for Xfer packetsAntonio Afonso2019-06-109-67/+226
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: This is the first of a few patches I have to improve the performance of dynamic module loading on Android. In this first diff I'll describe the context of my main motivation and will then link to it in the other diffs to avoid repeating myself. ## Motivation I have a few scenarios where opening a specific feature on an Android app takes around 40s when lldb is attached to it. The reason for that is because 40 modules are dynamicly loaded at that point in time and each one of them is taking ~1s. ## The problem To learn about new modules we have a breakpoint on a linker function that is called twice whenever a module is loaded. One time just before it's loaded (so lldb can check which modules are loaded) and another right after it's loaded (so lldb can check again which ones are loaded and calculate the diference). It's figuring out which modules are loaded that is taking quite some time. This is currently done by traversing the linked list of loaded shared libraries that the linker maintains in memory. Each item in the linked list requires its own `x` packet sent to the gdb server (this is android so the network also plays a part). In my scenario there are 400+ loaded libraries and even though we read 0x800 worth of bytes at a time we still make ~180 requests that end up taking 150-200ms. We also do this twice, once before the module is loaded (state = eAdd) and another right after (state = eConsistent) which easly adds up to ~400ms per module. ## A solution **Implement `xfer:libraries-svr4` in lldb-server:** I noticed in the code that loads the new modules that it had support for the `xfer:libraries-svr4` packet (added ~4 years ago to support the ds2 debug server) but we didn't support it in lldb-server. This single packet returns an xml list of all the loaded modules by the process. The advantage is that there's no more need to make 180 requests to read the linked list. Additionally this new requests takes around 10ms. **More efficient usage of the `xfer:libraries-svr4` packet in lldb:** When `xfer:libraries-svr4` is available the Process class has a `LoadModules` function that requests this packet and then loads or unloads modules based on the current list of loaded modules by the process. This is the function that is used by the DYLDRendezvous class to get the list of loaded modules before and after the module is loaded. However, this is really not needed since the LoadModules function already loaded or unloaded the modules accordingly. I changed this strategy to call LoadModules only once (after the process has loaded the module). **Bugs** I found a few issues in lldb while implementing this and have submitted independent patches for them. I tried to devide this into multiple logical patches to make it easier to review and discuss. ## Tests I wanted to put these set of diffs up before having all the tests up and running to start having them reviewed from a techical point of view. I'm also having some trouble making the tests running on linux so I need more time to make that happen. # This diff The `xfer` packages follow the same protocol, they are requested with `xfer:<object>:<read|write>:<annex>:<offset,length>` and a return that starts with `l` or `m` depending if the offset and length covers the entire data or not. Before implementing the `xfer:libraries-svr4` I refactored the `xfer:auxv` to generically handle xfer packets so we can easly add new ones. The overall structure of the function ends up being: * Parse the packet into its components: object, offset etc. * Depending on the object do its own logic to generate the data. * Return the data based on its size, the requested offset and length. Reviewers: clayborg, xiaobai, labath Reviewed By: labath Subscribers: mgorny, krytarowski, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D62499 llvm-svn: 362982
* [Target] Remove Process::GetObjCLanguageRuntimeAlex Langford2019-06-1025-68/+61
| | | | | | | | | | | Summary: In an effort to make Process more language agnostic, I removed GetCPPLanguageRuntime from Process. I'm following up now with an equivalent change for ObjC. Differential Revision: https://reviews.llvm.org/D63052 llvm-svn: 362981
* ABI: reflow the table text (NFC)Saleem Abdulrasool2019-06-101-954/+84
| | | | | | | Reflow the text for the table to make the table legible. This is purely cosmetic, but makes understanding the contents of the table easier. NFCI. llvm-svn: 362961
* Breakpad: Add support for the arm64e "architecture"Pavel Labath2019-06-103-1/+7
| | | | llvm-svn: 362960
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