Recently in #107731 this change was revereted due to excess memory size
in `TestSkinnyCore`. This was due to a bug where a range's end was being
passed as size. Creating massive memory ranges.
Additionally, and requiring additional review, I added more unit tests
and more verbose logic to the merging of save core memory regions.
@jasonmolenda as an FYI.
Reapplies #106293, testing identified issue in the merging code. I used
this opportunity to strip CoreFileMemoryRanges to it's own file and then
add unit tests on it's behavior.
This patch adds the option to specify specific memory ranges to be
included in a given core file. The current implementation lets user
specified ranges either be in addition to a certain save style, or
independent of them via the newly added custom enum.
To achieve being inclusive of save style, I've moved from a std::vector
of ranges to a RangeDataVector, and to join overlapping ranges to
prevent duplication of memory ranges in the core file.
As a non function bonus, when SBSavecore was initially created, the
header was included in the lldb-private interfaces, and I've fixed that
and moved it the forward declare as an oversight. CC @bulbazord in case
we need to include that into swift.
Reapply #100443 and #101770. These were originally reverted due to a
test failure and an MSAN failure. I changed the test attribute to
restrict to x86 (following the other existing tests). I could not
reproduce the test or the MSAN failure and no repo steps were provided.
In #100443, Mach-o and Minidump now only call process API's that take a
`SaveCoreOption` as the container for the style and information if a
thread should be included in the core or not. This introduced a bug
where in subsequent method calls we were not honoring the defaults of
both implementations.
~~To solve this I have made a copy of each SaveCoreOptions that is
mutable by the respective plugin. Originally I wanted to leave the
SaveCoreOptions as non const so these default value mutations could be
shown back to the user. Changing that behavior is outside of the scope
of this bugfix, but is context for why we are making a copy.~~
Removed const on the savecoreoptions so defaults can be inspected by the
user
CC: @Michael137
This PR adds `SBSaveCoreOptions`, which is a container class for options
when LLDB is taking coredumps. For this first iteration this container
just keeps parity with the extant API of `file, style, plugin`. In the
future this options object can be extended to allow users to take a
subset of their core dumps.
There can be zero padding bytes at a section end for file alignment in
PECOFF. Exclude those padding bytes when reading the section data.
Differential Revision: https://reviews.llvm.org/D157059
With D149091, ARM64X binaries are no longer reported as ARM64. This broke
lldb tests as Windows 11 system DLLs are mostly ARM64X binaries and lldb
doesn't know how to handle them. Ideally lldb would understand a bit more
about ARM64X and handle them as AMD64 in x64 processes, but this is
enough to preserve previous behavior and fix tests.
Reviewed By: mstorsjo
Differential Revision: https://reviews.llvm.org/D156268
If a symbol is the same as an export symbol, mark it as 'Additional' to
prevent the duplicated symbol from being repeated in some commands (e.g.
`disas -n func`). If the RVA is the same but exported with a different
name, only synchronize the symbol types.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D134426
This reimplements `ObjectFilePECOFF::ParseSymtab` to replace the manual
data extraction with what `COFFObjectFile` already provides. Also use
`SymTab::AddSymbol` instead of resizing the SymTab then assigning each
elements afterwards.
Previously, ParseSymTab loads symbols from both the COFF symbol table
and the export table, but if there are any entries in the export table,
it overwrites all the symbols already loaded from the COFF symbol table.
Due to the change to use AddSymbols, this no longer happens, and so the
SymTab now contains all symbols from both tables as expected.
The export symbols are now ordered by ordinal, instead of by the name
table order.
In its current state, it is possible for symbols in the COFF symbol
table to be duplicated by those in the export table. This behaviour will
be modified in a separate change.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D134196
PE/COFF can use either MSVC or GNU (MinGW) ABI for C++ code, however
LLDB had defaulted to MSVC implicitly with no way to override it. This
causes issues when debugging modules built with the GNU ABI, sometimes
even crashes.
This changes the PE/COFF plugin to set the module triple according to
the default target triple used to build LLDB. If the default target
triple is Windows and a valid environment is specified, then this
environment will be used for the module spec. This not only works for
MSVC and GNU, but also other environments.
A new setting, `plugin.object-file.pe-coff.abi`, has been added to
allow overriding this default ABI.
* Fixes https://github.com/llvm/llvm-project/issues/50775
* Fixes https://github.com/mstorsjo/llvm-mingw/issues/226
* Fixes https://github.com/mstorsjo/llvm-mingw/issues/282
Reviewed By: omjavaid
Differential Revision: https://reviews.llvm.org/D127048
The specification of gnu-debuglink can be found at:
https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html
The file CRC or the CRC value from the .gnu_debuglink section is now
used to calculate the module UUID as a fallback, to allow verifying that
the debug object does match the executable. Note that if a CodeView
build id exists, it still takes precedence. This works even for MinGW
builds because LLD writes a synthetic CodeView build id which does not
get stripped from the debug object.
The `Minidump/Windows/find-module` test also needs a fix by adding a
CodeView record to the exe to match the one in the minidump, otherwise
it fails due to the new UUID calculated from the file CRC.
Fixes https://github.com/llvm/llvm-project/issues/54344
Reviewed By: DavidSpickett
Differential Revision: https://reviews.llvm.org/D126367
The current design allows that the object file contents could be mapped
by one object file plugin and then used by another. Presumably the idea
here was to avoid mapping the same file twice.
This becomes an issue when one object file plugin wants to map the file
differently from the others. For example, ObjectFileELF needs to map its
memory as writable while others likeObjectFileMachO needs it to be
mapped read-only.
This patch prevents plugins from changing the buffer by passing them is
by value rather than by reference.
Differential revision: https://reviews.llvm.org/D122944
Symbol table parsing has evolved over the years and many plug-ins contained duplicate code in the ObjectFile::GetSymtab() that used to be pure virtual. With this change, the "Symbtab *ObjectFile::GetSymtab()" is no longer virtual and will end up calling a new "void ObjectFile::ParseSymtab(Symtab &symtab)" pure virtual function to actually do the parsing. This helps centralize the code for parsing the symbol table and allows the ObjectFile base class to do all of the common work, like taking the necessary locks and creating the symbol table object itself. Plug-ins now just need to parse when they are asked to parse as the ParseSymtab function will only get called once.
This is a retry of the original patch https://reviews.llvm.org/D113965 which was reverted. There was a deadlock in the Manual DWARF indexing code during symbol preloading where the module was asked on the main thread to preload its symbols, and this would in turn cause the DWARF manual indexing to use a thread pool to index all of the compile units, and if there were relocations on the debug information sections, these threads could ask the ObjectFile to load section contents, which could cause a call to ObjectFileELF::RelocateSection() which would ask for the symbol table from the module and it would deadlock. We can't lock the module in ObjectFile::GetSymtab(), so the solution I am using is to use a llvm::once_flag to create the symbol table object once and then lock the Symtab object. Since all APIs on the symbol table use this lock, this will prevent anyone from using the symbol table before it is parsed and finalized and will avoid the deadlock I mentioned. ObjectFileELF::GetSymtab() was never locking the module lock before and would put off creating the symbol table until somewhere inside ObjectFileELF::GetSymtab(). Now we create it one time inside of the ObjectFile::GetSymtab() and immediately lock it which should be safe enough. This avoids the deadlocks and still provides safety.
Differential Revision: https://reviews.llvm.org/D114288
This reverts commit 951b107eedab1829f18049443f03339dbb0db165.
Buildbots were failing, there is a deadlock in /Users/gclayton/Documents/src/llvm/clean/llvm-project/lldb/test/Shell/SymbolFile/DWARF/DW_AT_range-DW_FORM_sec_offset.s when ELF files try to relocate things.
Symbol table parsing has evolved over the years and many plug-ins contained duplicate code in the ObjectFile::GetSymtab() that used to be pure virtual. With this change, the "Symbtab *ObjectFile::GetSymtab()" is no longer virtual and will end up calling a new "void ObjectFile::ParseSymtab(Symtab &symtab)" pure virtual function to actually do the parsing. This helps centralize the code for parsing the symbol table and allows the ObjectFile base class to do all of the common work, like taking the necessary locks and creating the symbol table object itself. Plug-ins now just need to parse when they are asked to parse as the ParseSymtab function will only get called once.
Differential Revision: https://reviews.llvm.org/D113965
This patch deals with ObjectFile, ObjectContainer and OperatingSystem
plugins. I'll convert the other types in separate patches.
In order to enable piecemeal conversion, I am leaving some ConstStrings
in the lowest PluginManager layers. I'll convert those as the last step.
Differential Revision: https://reviews.llvm.org/D112061
There is no reason why this function should be returning a ConstString.
While modifying these files, I also fixed several instances where
GetPluginName and GetPluginNameStatic were returning different strings.
I am not changing the return type of GetPluginNameStatic in this patch, as that
would necessitate additional changes, and this patch is big enough as it is.
Differential Revision: https://reviews.llvm.org/D111877
In all these years, we haven't found a use for this function (it has
zero callers). Lets just remove the boilerplate.
Differential Revision: https://reviews.llvm.org/D109600
Add a new feature to process save-core on Darwin systems -- for
lldb to create a user process corefile with only the dirty (modified
memory) pages included. All of the binaries that were used in the
corefile are assumed to still exist on the system for the duration
of the use of the corefile. A new --style option to process save-core
is added, so a full corefile can be requested if portability across
systems, or across time, is needed for this corefile.
debugserver can now identify the dirty pages in a memory region
when queried with qMemoryRegionInfo, and the size of vm pages is
given in qHostInfo.
Create a new "all image infos" LC_NOTE for Mach-O which allows us
to describe all of the binaries that were loaded in the process --
load address, UUID, file path, segment load addresses, and optionally
whether code from the binary was executing on any thread. The old
"read dyld_all_image_infos and then the in-memory Mach-O load
commands to get segment load addresses" no longer works when we
only have dirty memory.
rdar://69670807
Differential Revision: https://reviews.llvm.org/D88387
Change the code the use the version which accepts a memory buffer,
instead of the one taking a file name.
This ensures we are not loading the file into memory twice
(ObjectFilePECOFF also loads a copy), reducing our memory footprint, as
well as enabling additional goodies in the future, like being able to
open files which don't exist on disk (D83512).
LLDB has a few different styles of header guards and they're not very
consistent because things get moved around or copy/pasted. This patch
unifies the header guards across LLDB and converts everything to match
LLVM's style.
Differential revision: https://reviews.llvm.org/D74743
This patch adds an implementation of unwinding using PE EH info. It allows to
get almost ideal call stacks on 64-bit Windows systems (except some epilogue
cases, but I believe that they can be fixed with unwind plan disassembly
augmentation in the future).
To achieve the goal the CallFrameInfo abstraction was made. It is based on the
DWARFCallFrameInfo class interface with a few changes to make it less
DWARF-specific.
To implement the new interface for PECOFF object files the class PECallFrameInfo
was written. It uses the next helper classes:
- UnwindCodesIterator helps to iterate through UnwindCode structures (and
processes chained infos transparently);
- EHProgramBuilder with the use of UnwindCodesIterator constructs EHProgram;
- EHProgram is, by fact, a vector of EHInstructions. It creates an abstraction
over the low-level unwind codes and simplifies work with them. It contains
only the information that is relevant to unwinding in the unified form. Also
the required unwind codes are read from the object file only once with it;
- EHProgramRange allows to take a range of EHProgram and to build an unwind row
for it.
So, PECallFrameInfo builds the EHProgram with EHProgramBuilder, takes the ranges
corresponding to every offset in prologue and builds the rows of the resulted
unwind plan. The resulted plan covers the whole range of the function except the
epilogue.
Reviewers: jasonmolenda, asmith, amccarth, clayborg, JDevlieghere, stella.stamenova, labath, espindola
Reviewed By: jasonmolenda
Subscribers: leonid.mashinskiy, emaste, mgorny, aprantl, arichardson, MaskRay, lldb-commits, llvm-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D67347
llvm-svn: 374528
Summary:
On the heels of D62934, this patch uses the same approach to introduce
llvm RTTI support to the ObjectFile hierarchy. It also replaces the
existing uses of GetPluginName doing run-time type checks with
llvm::dyn_cast and friends.
This formally introduces new dependencies from some other plugins to
ObjectFile plugins. However, I believe this is fine because:
- these dependencies were already kind of there, and the only reason
we could get away with not modeling them explicitly was because the
code was relying on magically knowing what will GetPluginName() return
for a particular kind of object files.
- the dependencies themselves are logical (it makes sense for
SymbolVendorELF to depend on ObjectFileELF), or at least don't
actively get in the way (the JitLoaderGDB->MachO thing).
- they don't introduce any new dependency loops as ObjectFile plugins
don't depend on any other plugins
Reviewers: xiaobai, JDevlieghere, espindola
Subscribers: emaste, mgorny, arichardson, MaskRay, lldb-commits
Differential Revision: https://reviews.llvm.org/D65450
llvm-svn: 367413
This time, the warning pointed to an actual problem, because the
coff_opt_header structure contained a std::vector. I guess this happened
to work because the all-zero state was a valid representation of an
empty vector, but its not a good idea to rely on that.
I remove the memset, and have the structure clear its members in the
constructor instead.
llvm-svn: 367299
Summary:
According to [C128] "Virtual functions should specify exactly one
of `virtual`, `override`, or `final`", I've added override where a
virtual function is overriden but the explicit `override` keyword
was missing. Whenever both `virtual` and `override` were specified,
I removed `virtual`. As C.128 puts it:
> [...] writing more than one of these three is both redundant and
> a potential source of errors.
I anticipate a discussion about whether or not to add `override` to
destructors but I went for it because of an example in [ISOCPP1000].
Let me repeat the comment for you here:
Consider this code:
```
struct Base {
virtual ~Base(){}
};
struct SubClass : Base {
~SubClass() {
std::cout << "It works!\n";
}
};
int main() {
std::unique_ptr<Base> ptr = std::make_unique<SubClass>();
}
```
If for some odd reason somebody removes the `virtual` keyword from the
`Base` struct, the code will no longer print `It works!`. So adding
`override` to destructors actively protects us from accidentally
breaking our code at runtime.
[C128]: https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#c128-virtual-functions-should-specify-exactly-one-of-virtual-override-or-final
[ISOCPP1000]: https://github.com/isocpp/CppCoreGuidelines/issues/1000#issuecomment-476951555
Reviewers: teemperor, JDevlieghere, davide, shafik
Reviewed By: teemperor
Subscribers: kwk, arphaman, kadircet, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D61440
llvm-svn: 359868
A lot of comments in LLDB are surrounded by an ASCII line to delimit the
begging and end of the comment.
Its use is not really consistent across the code base, sometimes the
lines are longer, sometimes they are shorter and sometimes they are
omitted. Furthermore, it looks kind of weird with the 80 column limit,
where the comment actually extends past the line, but not by much.
Furthermore, when /// is used for Doxygen comments, it looks
particularly odd. And when // is used, it incorrectly gives the
impression that it's actually a Doxygen comment.
I assume these lines were added to improve distinguishing between
comments and code. However, given that todays editors and IDEs do a
great job at highlighting comments, I think it's worth to drop this for
the sake of consistency. The alternative is fixing all the
inconsistencies, which would create a lot more churn.
Differential revision: https://reviews.llvm.org/D60508
llvm-svn: 358135
COFF files are modelled in lldb as having one big container section
spanning the entire module image, with the actual sections being
subsections of that. In this model, the base address is simply the
address of the first byte of that section.
This also removes the hack where ObjectFilePECOFF was using the
m_file_offset field to communicate this information. Using file offset
for this purpose is completely wrong, as that is supposed to indicate
where is this ObjectFile located in the file on disk. This field is only
meaningful for fat binaries, and should normally be 0.
Both PDB plugins have been updated to use GetBaseAddress instead of
GetFileOffset.
llvm-svn: 354258
instead of returning the UUID through by-ref argument and a boolean
value indicating success, we can just return it directly. Since the UUID
class already has an invalid state, it can be used to denote the failure
without the additional bool.
llvm-svn: 353714
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
If a section name is exactly 8 bytes long (or has been truncated to 8
bytes), it will not contain the terminating nul character. This means
reading the name as a c string will pick up random data following the
name field (which happens to be the section vm size).
This fixes the name computation to avoid out-of-bounds access and adds a
test.
Reviewers: zturner, stella.stamenova
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D56124
llvm-svn: 350809
Summary:
instead of returning the architecture through by-ref argument and a
boolean value indicating success, we can just return the ArchSpec
directly. Since the ArchSpec already has an invalid state, it can be
used to denote the failure without the additional bool.
Reviewers: clayborg, zturner, espindola
Subscribers: emaste, arichardson, JDevlieghere, lldb-commits
Differential Revision: https://reviews.llvm.org/D56129
llvm-svn: 350291
Summary:
This parses entries in pecoff import tables for imported DLLs and
is intended as the first step to allow LLDB to load a PE's shared
modules when creating a target on the LLDB console.
Reviewers: rnk, zturner, aleksandr.urakov, lldb-commits, labath, asmith
Reviewed By: labath, asmith
Subscribers: labath, lemo, clayborg, Hui, mgorny, mgrang, teemperor
Differential Revision: https://reviews.llvm.org/D53094
llvm-svn: 348527
This patch removes the comments grouping header includes. They were
added after running IWYU over the LLDB codebase. However they add little
value, are often outdates and burdensome to maintain.
llvm-svn: 346626
This renames the LLDB error class to Status, as discussed
on the lldb-dev mailing list.
A change of this magnitude cannot easily be done without
find and replace, but that has potential to catch unwanted
occurrences of common strings such as "Error". Every effort
was made to find all the obvious things such as the word "Error"
appearing in a string, etc, but it's possible there are still
some lingering occurences left around. Hopefully nothing too
serious.
llvm-svn: 302872
Summary:
When the local lldb doesn't have access to a copy of the modules in the target, e.g. winphone, with this change now we read these modules from memory.
There are mainly 2 changes:
1. create pecoff object files from memory
2. read from memory when the local file is not available
Reviewers: sas, fjricci, zturner
Subscribers: #lldb
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D24284
llvm-svn: 284422
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
