This patch fixes register save/restore on expression call to also include SVE registers.
This will fix expression calls like:
re re p1
<Register Value P1 before expression>
p <var-name or function call>
re re p1
<Register Value P1 after expression>
In above example register P1 should remain the same before and after the expression evaluation.
Reviewed By: DavidSpickett
Differential Revision: https://reviews.llvm.org/D108739
This patch removed some typos from NativeRegisterContextLinux_arm and
NativeRegisterContextLinux_arm64. Some of the log/error messages were
being reported as x86_64.
AArch64 architecture support virtual addresses with some of the top bits ignored.
These ignored bits can host memory tags or bit masks that can serve to check for
authentication of address integrity. We need to clear away the top ignored bits
from watchpoint address to reliably hit and set watchpoints on addresses
containing tags or masks in their top bits.
This patch adds support to watch tagged addresses on AArch64/Linux.
Reviewed By: DavidSpickett
Differential Revision: https://reviews.llvm.org/D101361
Commit 090306fc80dbf (August 2020) changed most of the arm64 SVE_PT*
macros, but apparently did not make the changes in the
NativeRegisterContextLinux_arm64.* files (or those files were pulled
over from someplace else after that commit). This change replaces the
macros NativeRegisterContextLinux_arm64.cpp with the replacement
definitions in LinuxPTraceDefines_arm64sve.h. It also includes
LinuxPTraceDefines_arm64sve.h in NativeRegisterContextLinux_arm64.h.
Differential Revision: https://reviews.llvm.org/D104826
This adds memory tag reading using the new "qMemTags"
packet and ptrace on AArch64 Linux.
This new packet is following the one used by GDB.
(https://sourceware.org/gdb/current/onlinedocs/gdb/General-Query-Packets.html)
On AArch64 Linux we use ptrace's PEEKMTETAGS to read
tags and we assume that lldb has already checked that the
memory region actually has tagging enabled.
We do not assume that lldb has expanded the requested range
to granules and expand it again to be sure.
(although lldb will be sending aligned ranges because it happens
to need them client side anyway)
Also we don't assume untagged addresses. So for AArch64 we'll
remove the top byte before using them. (the top byte includes
MTE and other non address data)
To do the ptrace read NativeProcessLinux will ask the native
register context for a memory tag manager based on the
type in the packet. This also gives you the ptrace numbers you need.
(it's called a register context but it also has non register data,
so it saves adding another per platform sub class)
The only supported platform for this is AArch64 Linux and the only
supported tag type is MTE allocation tags. Anything else will
error.
Ptrace can return a partial result but for lldb-server we will
be treating that as an error. To succeed we need to get all the tags
we expect.
(Note that the protocol leaves room for logical tags to be
read via qMemTags but this is not going to be implemented for lldb
at this time.)
Reviewed By: omjavaid
Differential Revision: https://reviews.llvm.org/D95601
This reverts commit 71b648f7158c7a0b4918eaa3e94d307e4bbfce97.
There was a typo in the last commit which was causing LLDB AArch64 Linux
buildbot testsuite failures. Now fixed in current version.
This patch adds two new dynamic register sets for AArch64 MTE and
Pointer Authentication features. These register sets are dynamic and
will only be available if underlying hardware support either of these
features. LLDB will pull in Aux vector information and create register
infos based on that information.
A follow up patch will add a test case to test these feature registers.
Reviewed By: labath, DavidSpickett
Differential Revision: https://reviews.llvm.org/D96460
This is patch adds support for adding dynamic register sets for
AArch64 dynamic features in LLDB. AArch64 has optional features like
SVE, Pointer Authentication and MTE which means LLDB needs to decide
at run time which registers it needs to pull in for the current
executable based on underlying support for a certain feature.
This patch makes necessary adjustments to make way for dynamic
register infos and dynamic register sets.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D96458
Split out the common base of Linux hardware breakpoint/watchpoint
support for AArch64 into a Utility class, and use it to implement
the matching support on FreeBSD.
Differential Revision: https://reviews.llvm.org/D96548
This patch builds on previously submitted SVE patches regarding expedited
register set and per thread register infos. (D82853 D82855 and D82857)
We need to resize SVE register based on value received in expedited list.
Also we need to resize SVE registers when we write vg register using
register write vg command. The resize will result in a updated offset
for all of fpr and sve register set. This offset will be configured
in native register context by RegisterInfoInterface and will also be
be updated on client side in GDBRemoteRegisterContext.
A follow up patch will provide a API test to verify this change.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D82863
This came up while putting together our new strategy to create g/G packets
in compliance with GDB RSP protocol where register offsets are calculated in
increasing order of register numbers without any unused spacing.
RegisterInfoPOSIX_arm64::GPR size was being calculated after alignment
correction to 8 bytes which meant there was a 4 bytes unused space between
last gpr (cpsr) and first vector register V. We have put LLVM_PACKED_START
decorator on RegisterInfoPOSIX_arm64::GPR to make sure single byte
alignment is enforced. Moreover we are now doing to use arm64 user_pt_regs
struct defined in ptrace.h for accessing ptrace user registers.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D92063
This patch ovverides GetExpeditedRegisterSet for
NativeRegisterContextLinux_arm64 to send vector granule register in
expedited register set if SVE mode is selected.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D82855
This moves in the direction of our effort to synchronize register descriptions
between LLDB and GDB xml description. We want to able to send registers in a
way that their offset fields can be re-constructed based on register sizes
in the increasing order of register number.
In context to Arm64 SVE, FPCR and FPSR are same registers in FPU regset and
SVE regset. Previously FPSR/FPCR offset was set at the end of SVE data
because Linux ptrace data placed FPCR and FPSR at the end of SVE register set.
Considering interoperability with other stubs like QEMU and that g packets
should generate register data in increasing order of register numbers. We
have to move FPCR/FPSR offset up to its original location according to
register numbering scheme of ARM64 registers with SVE registers included.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D90741
There was typo left from changes in CalculateSVEOffset where we moved
FPSR/FPCR offset calculation into WriteRegister and ReadRegister.
Differential Revision: https://reviews.llvm.org/D79699
This patch adds NativeRegisterContext_arm64 ptrace routines to access
AArch64 SVE register set. This patch also adds a test-case to test
AArch64 SVE register access and dynamic size configuration capability.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D79699
Summary:
This patch aims to combine similar arm64 register set definitions defined in NativeRegisterContextLinux_arm64 and RegisterContextPOSIX_arm64.
I have implemented a register set interface out of RegisterInfoInterface class and moved arm64 register sets into RegisterInfosPOSIX_arm64 which is similar to Utility/RegisterContextLinux_* implemented by various other targets. This will help in managing register sets of new ARM64 architecture features in one place.
Built and tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabihf targets.
Reviewers: labath
Reviewed By: labath
Subscribers: mhorne, emaste, kristof.beyls, atanasyan, danielkiss, lldb-commits
Differential Revision: https://reviews.llvm.org/D80105
Summary:
A *.cpp file header in LLDB (and in LLDB) should like this:
```
//===-- TestUtilities.cpp -------------------------------------------------===//
```
However in LLDB most of our source files have arbitrary changes to this format and
these changes are spreading through LLDB as folks usually just use the existing
source files as templates for their new files (most notably the unnecessary
editor language indicator `-*- C++ -*-` is spreading and in every review
someone is pointing out that this is wrong, resulting in people pointing out that this
is done in the same way in other files).
This patch removes most of these inconsistencies including the editor language indicators,
all the different missing/additional '-' characters, files that center the file name, missing
trailing `===//` (mostly caused by clang-format breaking the line).
Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere
Reviewed By: JDevlieghere
Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D73258
Summary:
This patch simplifies register accesses in NativeRegisterContextLinux_arm64
and also adds some bare minimum caching to avoid multiple calls to ptrace
during a stop.
Linux ptrace returns data in the form of structures containing GPR/FPR data.
This means that one single call is enough to read all GPRs or FPRs. We do
that once per stop and keep reading from or writing to the buffer that we
have in NativeRegisterContextLinux_arm64 class. Before a resume or detach we
write all buffers back.
This is tested on aarch64 thunder x1 with Ubuntu 18.04. Also tested
regressions on x86_64.
Reviewers: labath, clayborg
Reviewed By: labath
Subscribers: kristof.beyls, lldb-commits
Differential Revision: https://reviews.llvm.org/D69371
Summary:
This patch follows the spirit of D63594, and removes some null checks
for things which should be operating invariants. Specifically
{Read,Write}[GF]PR now no longer check whether the supplied buffers are
null, because they never are. After this, the Do*** versions of these
function no longer serve any purpose and are inlined into their callers.
Other cleanups are possible here too, but I am taking this one step at a
time because this involves a lot of architecture-specific code, which I
don't have the hardware to test on (I did do a build-test though).
Reviewers: mgorny, jankratochvil, omjavaid, alexandreyy, uweigand
Subscribers: nemanjai, javed.absar, kbarton, lldb-commits
Differential Revision: https://reviews.llvm.org/D66744
llvm-svn: 370653
Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.
Differential revision: https://reviews.llvm.org/D66259
llvm-svn: 368933
This patch replaces explicit calls to log::Printf with the new LLDB_LOGF
macro. The macro is similar to LLDB_LOG but supports printf-style format
strings, instead of formatv-style format strings.
So instead of writing:
if (log)
log->Printf("%s\n", str);
You'd write:
LLDB_LOG(log, "%s\n", str);
This change was done mechanically with the command below. I replaced the
spurious if-checks with vim, since I know how to do multi-line
replacements with it.
find . -type f -name '*.cpp' -exec \
sed -i '' -E 's/log->Printf\(/LLDB_LOGF\(log, /g' "{}" +
Differential revision: https://reviews.llvm.org/D65128
llvm-svn: 366936
A bunch of places were checking that DataBufferHeap::GetBytes returns a
non-null pointer right after constructing it. The only time when
GetBytes returns a null pointer is if it is empty (and I'm not sure that
even this is a good idea), but that is clearly not the case here, as the
buffer was constructed with a non-zero size just a couple of lines back.
llvm-svn: 364754
operator new doesn't return a null pointer, even if one turns off
exceptions (it calls std::terminate instead). Therefore, all of this is
dead code.
llvm-svn: 364744
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
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
These three classes have no external dependencies, but they are used
from various low-level APIs. Moving them down to Utility improves
overall code layering (although it still does not break any particular
dependency completely).
The XCode project will need to be updated after this change.
Differential Revision: https://reviews.llvm.org/D49740
llvm-svn: 339127
This is intended as a clean up after the big clang-format commit
(r280751), which unfortunately resulted in many of the comment
paragraphs in LLDB being very hard to read.
FYI, the script I used was:
import textwrap
import commands
import os
import sys
import re
tmp = "%s.tmp"%sys.argv[1]
out = open(tmp, "w+")
with open(sys.argv[1], "r") as f:
header = ""
text = ""
comment = re.compile(r'^( *//) ([^ ].*)$')
special = re.compile(r'^((([A-Z]+[: ])|([0-9]+ )).*)|(.*;)$')
for line in f:
match = comment.match(line)
if match and not special.match(match.group(2)):
# skip intentionally short comments.
if not text and len(match.group(2)) < 40:
out.write(line)
continue
if text:
text += " " + match.group(2)
else:
header = match.group(1)
text = match.group(2)
continue
if text:
filled = textwrap.wrap(text, width=(78-len(header)),
break_long_words=False)
for l in filled:
out.write(header+" "+l+'\n')
text = ""
out.write(line)
os.rename(tmp, sys.argv[1])
Differential Revision: https://reviews.llvm.org/D46144
llvm-svn: 331197
Summary:
This commit removes the concrete_frame_idx member from
NativeRegisterContext and related functions, which was always set to
zero and never used.
I also change the native thread class to store a NativeRegisterContext
as a unique_ptr (documenting the ownership) and make sure it is always
initialized (most of the code was already blindly dereferencing the
register context pointer, assuming it would always be present -- this
makes its treatment consistent).
Reviewers: eugene, clayborg, krytarowski
Subscribers: aemerson, sdardis, nemanjai, javed.absar, arichardson, kristof.beyls, kbarton, uweigand, alexandreyy, lldb-commits
Differential Revision: https://reviews.llvm.org/D39837
llvm-svn: 317881
Summary:
These functions used to return bool to signify whether they were able to
retrieve the data. This is redundant because the ArchSpec and ByteOrder
already have their own "invalid" states, *and* because both of the
current implementations (linux, netbsd) can always provide a valid
result.
This allows us to simplify bits of the code handling these values.
Reviewers: eugene, krytarowski
Subscribers: javed.absar, lldb-commits
Differential Revision: https://reviews.llvm.org/D39733
llvm-svn: 317779
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
All references to Host and Core have been removed, so this
class can now safely be lowered into Utility.
Differential Revision: https://reviews.llvm.org/D30559
llvm-svn: 296909
This moves the following classes from Core -> Utility.
ConstString
Error
RegularExpression
Stream
StreamString
The goal here is to get lldbUtility into a state where it has
no dependendencies except on itself and LLVM, so it can be the
starting point at which to start untangling LLDB's dependencies.
These are all low level and very widely used classes, and
previously lldbUtility had dependencies up to lldbCore in order
to use these classes. So moving then down to lldbUtility makes
sense from both the short term and long term perspective in
solving this problem.
Differential Revision: https://reviews.llvm.org/D29427
llvm-svn: 293941
Summary:
This is a test-the-water change about possibilities of reducing duplication in
the register context definitions.
I've named the new class RegisterInfoPOSIX, as RegisterContextPOSIX was already
taken :(. The two files were identical except for a fix by Tamas in D12636,
which was applied to the Linux version only, which fixed a discrepancy between
the definitions of fpsr and fpcr on one hand, and all other floating point
register definitions on the other.
Linux test suite still passes after this change. For freebsd, make the floating
point register behavior consistent, but I don't know whether it will be
consistently fixed, or consistently broken. By eyeballing the code, I have a
feeling that a similar fix to D12636 will be required in
RegisterContextPOSIXProcessMonitor_arm64::ReadRegister, but I can't be sure as I
have no way to test it (the assert in that function should fire upon accessing
the registers if it is wrong though).
Reviewers: emaste, clayborg
Subscribers: aemerson, rengolin, beanz, mgorny, modocache, dmikulin, lldb-commits
Differential Revision: https://reviews.llvm.org/D25947
llvm-svn: 287916
My script updated lldb::Errors, and I failed to fix it entirely
before pushing. This restore everything in lldb as it was before
r286561.
llvm-svn: 286565
This is forcing to use Error::success(), which is in a wide majority
of cases a lot more readable.
Differential Revision: https://reviews.llvm.org/D26481
llvm-svn: 286561
It's quite sad that we have to edit so many files just to add a register. I am
going to investigate how to merge these definitions somehow, but for now this
should at least get arm64 linux working again.
llvm-svn: 284970
This patch fixes ARM/AArch64 watchpoint bug which was taking inferior out of control while stepping over watchpoints.
Also adds a test case that tests above problem.
Differential revision: https://reviews.llvm.org/D25057
llvm-svn: 284706
*** 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
