Commit Graph

617 Commits

Author SHA1 Message Date
Ryan Macnak 8c73b534f5 [vm] Use dmb ishst instead of dmb ish for store-store fence.
TEST=ci
Change-Id: Id7fb33bb4d9626ad420fd5aac2df86b47bd5c7bf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/459662
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
2025-11-05 13:29:00 -08:00
Ryan Macnak fd7ddd4cd0 [vm] Fix Android ARM32 build.
Change-Id: I9467bc4145f09ffbbf4a10ecde627dec59fc023c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/456140
Reviewed-by: Liam Appelbe <liama@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-10-20 15:36:20 -07:00
Ryan Macnak 0a1678c06c [vm] Record stack for JIT TSAN.
The main interesting thing is that deopt can expand one optimized frame to multiple unoptimized frames, so deopt needs to call  __tsan_func_entry enough times to rebalance the stack.

Also fixes stack balance for throw error slow paths for AOT.

TEST=tsan
Bug: https://github.com/dart-lang/sdk/issues/61352
Change-Id: I3fdc8481bc8db7a3aec0fa1938ac3e0e96ac13a5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/452943
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2025-10-20 10:49:20 -07:00
Ryan Macnak 6938441679 [build] Increase android_api_level from 21 to 24.
Bug: https://github.com/dart-lang/sdk/issues/61664
Change-Id: I10a99fbe03df32f056765913e75f14b63bc33bc1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/453681
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-10-07 13:17:21 -07:00
Ryan Macnak f1ba8ceacf [vm] Make some IgnoreRace functions inlinable.
Fix GCC TSAN build.
Cleanup sanitizer includes.

TEST=ci
Change-Id: Ib68bbfa701b4309c03514ed689391051094208e4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/452226
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
2025-10-01 09:41:26 -07:00
Ryan Macnak 95222f13c8 [vm] Don't use _setjmp/_longjmp on Mac under TSAN.
TSAN is missing an interceptor for _longjmp (but seems to have it for _setjmp).

TEST=vm/dart/regress47472_test
Bug: https://github.com/dart-lang/sdk/issues/61536
Change-Id: I569de111f8919e50ab0faf1e8e1e5a9ebba3a63a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/452525
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-09-30 15:17:12 -07:00
Ryan Macnak 78d280a2df [vm] Symbolize JIT Dart frames for TSAN.
TEST=tsan
Bug: https://github.com/dart-lang/sdk/issues/61352
Change-Id: I0e64e563b19bbd7b67e6f275dbc373db08b9d2c7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/449980
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-09-24 13:14:32 -07:00
Ivan Inozemtsev d9bd6667c2 Switch from deprecated absl::Mutex methods
I think synchronization_absl affects only google3, so should be no-op
externally.

Change-Id: I2845991719e5887e77c52528cd8155f1d20bcfaf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/449823
Auto-Submit: Ivan Inozemtsev <iinozemtsev@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
2025-09-16 06:45:10 -07:00
Ryan Macnak 6f4a9bd481 [vm] Work around missing TSAN support for thread_suspend.
TEST=tsan
Bug: https://github.com/dart-lang/sdk/issues/61478
Change-Id: I700f36eb07c998993682f046d82bbc9d04847f9c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/449074
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-09-15 10:00:44 -07:00
Brandon Castellano 0c45b7e861 [runtime] Transition to new fdio functions
This should allow Dart to start targeting Fuchsia API level 28.

TEST=ci

Bug: b/434220174
Change-Id: Id55deb491122be85d9a5731be2c7571b0126dcd8
Cq-Include-Trybots: luci.dart.try:vm-fuchsia-release-arm64-try,vm-fuchsia-release-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/448260
Commit-Queue: Ben Konyi <bkonyi@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
2025-09-02 14:27:50 -07:00
Ryan Macnak e01d4b3cc6 [vm, compiler] Get the full Dart stack in TSAN reports.
Call __tsan_func_entry/__tsan_func_exit in functions that use __tsan_read/__tsan_write or call other functions. Call __tsan_func_exit once per frame when unwinding for exceptions. Do so only in AOT, since TSAN won't be able to symbolize JIT functions anyway.

TEST=ci
Bug: https://github.com/dart-lang/sdk/issues/61352
Cq-Include-Trybots: luci.dart.try:vm-tsan-linux-release-arm64-try,vm-tsan-linux-release-x64-try
Change-Id: Ie52c978c25664d78b834e9b72ecf7eb2a12cc2ba
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/444181
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-08-26 11:50:13 -07:00
Vyacheslav Egorov 9cf56fbc7e [vm] Add builtin TSAN suppressions
Sanitizers can pickup configuration and suppressions via
special symbols in the binary (e.g. __*_default_suppressions and
__*_default_options). We have a bunch of stale files in the
buildroot which showed how to do it, but none of these were
actually used by the build process.

Update our BUILDCONFIG.gn to actually link this code into
the binaries and clean it up leaving behind only one relevant
suppression for TSAN.

Additionally fix libplatform targets - libdart_platform_no_tsan was
accidentally disabling TSAN for the whole libplatform by adding
no_tsan_config into public_configs instead of extra_configs.

This is needed to unblock landing https://dart-review.googlesource.com/c/sdk/+/444983

TEST=manually with the referenced CL to verify that suppressions work

Cq-Include-Trybots: luci.dart.try:vm-tsan-linux-release-x64-try,vm-tsan-linux-release-arm64-try
Change-Id: Id4e8a5b89c665cf5d89b18c4f5881ef31c3c9396
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/445941
Commit-Queue: Slava Egorov <vegorov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
2025-08-20 23:25:51 -07:00
Ryan Macnak e6053248c3 [vm, compiler] Add TSAN instrumentation to Dart field access.
Allows TSAN to detect data races involving Dart fields.

TEST=tsan
Cq-Include-Trybots: luci.dart.try:vm-tsan-linux-release-x64-try,vm-tsan-linux-release-arm64-try,iso-stress-linux-arm64-try,iso-stress-linux-x64-try
Change-Id: Ic7a6c7e6c1810adf79b41e5c0ae891132f368a61
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/439143
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-08-06 09:18:43 -07:00
Ryan Macnak dc97aa7fb9 [vm, compiler] Update TSAN instrumentation.
TEST=tsan
Cq-Include-Trybots: luci.dart.try:vm-tsan-linux-release-x64-try,vm-tsan-linux-release-arm64-try,iso-stress-linux-arm64-try,iso-stress-linux-x64-try
Change-Id: I0c49b501c53f9a5117bb14800e342e6fe9b4eba6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/442730
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-08-04 15:29:04 -07:00
Tess Strickland 83e9bd72ea [vm] Additional Mach-O related command line options for gen_snapshot.
Adds the following command line options to gen_snapshot:

* --macho-install-name: The name to use as the install name for the
  dynamic library (used in the LC_ID_DYLIB and LC_CODE_SIGNATURE
  load commands). If not provided, the output filename is used.

* --[no-]macho-linker-signature: Whether or not gen_snapshot should
  generate an ad-hoc linker-signed signature. Defaults to true.

The following command line option is macOS/iOS-specific:

* --macho-rpath: Comma-delimited run paths that should be added at
  runtime to the current run path used for finding @rpath-prefixed
  dynamic libraries.

Adds support to parsing rpath and dylib load commands to
pkg/native_stack_traces's Mach-O parser in order to test the
command line options appropriately.

TEST=vm/dart/use_macho_options

Issue: https://github.com/dart-lang/sdk/issues/60307
Change-Id: I17618578a7bff7851a88cdaf27f299f058f98dd3
Cq-Include-Trybots: luci.dart.try:vm-aot-mac-debug-x64-try,vm-aot-mac-debug-arm64-try,vm-aot-linux-debug-arm64-try,vm-aot-linux-debug-x64-try,pkg-mac-release-try,pkg-mac-release-arm64-try,pkg-linux-release-arm64-try,vm-aot-win-release-arm64-try,vm-aot-win-debug-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/441920
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
2025-07-29 06:01:14 -07:00
Alexander Aprelev 74846b96c3 [vm] Introduce ReentrantMonitor.
Existing Monitor is not reentrable, doesn't support acquiring it if it is already acquired by this thread.

TEST=ReentrantMonitorAllowsReentrance

Change-Id: Id74479388a99ca907bca6e379c3a7e08191e841b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/436542
Commit-Queue: Alexander Aprelev <aam@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
2025-06-23 21:08:19 -07:00
Vyacheslav Egorov 20dc41763a [vm] Fix implementation of IsAtLeastIOS<X>
It was hardcoding the wrong constant.

R=kustermann@google.com
TEST=manually

Change-Id: Ice17fa7aed7a6c68c0c9ac31a3258aa33ede0e08
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/435780
Commit-Queue: Slava Egorov <vegorov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
2025-06-19 01:46:18 -07:00
Ryan Macnak 7973eacdd0 [vm] Rename USING_SIMULATOR to DART_INCLUDE_SIMULATOR.
We now have a mode where the simulator is available but not always used.

TEST=ci
Change-Id: If271f334150e2a125a014a4baa2e03d726300d35
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/435562
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
2025-06-18 13:07:22 -07:00
Vyacheslav Egorov dc0567c02c [vm] Rework RX workarounds
* Disable RX workarounds on simulators: they cause host OS to crash;
* Remove Mac OS test for RX workarounds: it can cause host OS to crash;
* Remove old outdated code paths for OS versions that don't
need workarounds.
* Add code which detects whether workaround worked or not by intercepting EXC_BAD_ACCESS.
* Avoid using vm_remap in FFI callbacks when JITing, it does not work.
Instead restore old logic which manually copies page content, but adjust
FFI callbacks implementation to respect possible dual mapping.

This reworks changes done in commit
d194fcecaf after additional testing on a
wider range of hardware.

TEST=manually on physical devices and simulators

Change-Id: I339379386183c532fec25e88fa436ff0b970c2cf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/435120
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
2025-06-18 06:09:14 -07:00
Tess Strickland 12994040e0 [vm] Add compact unwinding info to ARM64 Mach-O snapshots.
For other architectures, a __eh_frame section is generated like
for non-MacOS platforms.

TEST=vm/dart/unwinding_information_test

Issue: https://github.com/dart-lang/sdk/issues/60307
Change-Id: I46c6ff1357c222f73a129e1becd9b12b3fb6ef9c
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-mac-release-arm64-try,vm-aot-mac-release-arm64-try,vm-aot-mac-release-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try,vm-fuchsia-release-x64-try,vm-fuchsia-release-arm64-try,vm-aot-linux-release-simarm_x64-try,vm-gcc-linux-try,vm-ubsan-linux-release-arm64-try,vm-aot-win-release-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433020
Reviewed-by: Slava Egorov <vegorov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
2025-06-17 06:22:15 -07:00
Tess Strickland b85d7622f5 [vm] Add N_OSO symbolic debugging symbol to unstripped Mach-O symtabs.
Adding this allows dsymutil to parse a DebugMap from the Mach-O file,
which allows it to then create an appropriate .dSYM package for the
dylib if desired.

TEST=vm/dart/unobfuscated_static_symbols_test

Cq-Include-Trybots: luci.dart.try:vm-aot-mac-release-arm64-try,vm-aot-linux-release-simarm_x64-try
Bug: https://github.com/dart-lang/sdk/issues/60307
Change-Id: I723fde90b73d74e06840418c693858f5729cea58
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/434381
Reviewed-by: Slava Egorov <vegorov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
2025-06-17 02:40:40 -07:00
Vyacheslav Egorov d194fcecaf [vm] Use dual mapping of code pages on certain OS versions
Heap references always point into R/RW mapping (this simplifies the
marker) and entry points are retargeted into RX.

To simplify implementation we assume that there are no image pages
created - which means we can always go from Instructions to the start of
the page and check where it is dual mapped to.

TEST=vm/dart/macos_dual_mapping_smoke_test and manually on physical
device

Change-Id: Idbe02b7b695b3c048072cf92f7d062f5ab6e1beb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433940
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
2025-06-12 20:46:54 -07:00
Tess Strickland 14889cc06d [vm] Handle Windows unwinding records better in the Mach-O loader.
The Mach-O writer puts the unwinding records in a __unwind_info
section, so just find the appropriate section and use its contents
instead of forcing it to be at the end of the segment's memory space.

Create an overload of UnwindingRecordsPlatform::RegisterExecutableMemory
that takes a pointer to the start of the unwinding records for use by
the Mach-O loader.

Add __unwind_info for any executable segments that are not the text
segment as well.

Instead of testing host/target windows plus 64-bit arch, use the
defines provided by platform/unwinding_records.h in the Mach-O
writer and the ELF and Mach-O loaders.

TEST=ci on Windows trybots

Issue: https://github.com/dart-lang/sdk/issues/60307
Change-Id: Iee53c6725a681f44ac98ed9c9aecf1b75853ece5
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-mac-release-arm64-try,vm-aot-mac-release-arm64-try,vm-aot-mac-release-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try,vm-gcc-linux-try,vm-aot-win-release-arm64-try,vm-aot-win-release-x64-try,vm-win-release-x64-try,vm-win-release-arm64-try,vm-aot-win-debug-arm64-try,vm-win-debug-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/432960
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
2025-06-11 04:43:24 -07:00
Ryan Macnak ad437479a3 [vm] Move some VM defines out of platform.
TEST=build
Bug: https://github.com/dart-lang/sdk/issues/32364
Change-Id: Icf0d8f69235ec0369cbe135f833a522a1269319f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433962
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-06-10 14:06:45 -07:00
Ryan Macnak bc17496b00 [vm] Fix Google3 ClangTidy warnings.
TEST=presubmit
Change-Id: Ifa4e77cc4548729526a90683ee163c68517e87ef
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433001
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-06-04 15:14:15 -07:00
Tess Strickland 4689b49490 [vm] Generate __eh_frame section in non-MacOS Mach-O snapshots.
Factor out the .eh_frame section content generation from ElfWriter,
putting in as a static method in Dwarf instead.

Create a __eh_frame section in the __TEXT section of non-MacOS Mach-O
snapshots with the same information as .eh_frame in ELF snapshots.

TEST=ci

Issue: https://github.com/dart-lang/sdk/issues/60307
Change-Id: I4e123f586e59e1263385c838b755c1575a6330eb
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-mac-release-arm64-try,vm-aot-mac-release-arm64-try,vm-aot-mac-release-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try,vm-fuchsia-release-x64-try,vm-fuchsia-release-arm64-try,vm-linux-debug-ia32-try,vm-aot-linux-debug-simarm_x64-try,vm-aot-linux-debug-simriscv32-try,vm-aot-linux-debug-simriscv64-try,vm-aot-linux-release-simarm_x64-try,vm-gcc-linux-try,vm-ubsan-linux-release-arm64-try,vm-aot-win-release-arm64-try,vm-aot-win-release-x64-try,vm-win-release-x64-try,vm-win-release-arm64-try,vm-aot-win-debug-arm64-try,vm-win-debug-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/431600
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
2025-06-03 05:56:59 -07:00
Tess Strickland f7699740cc [vm] Allow manual loading of Mach-O dynamic library snapshots.
Adds a Mach-O loader, similar to the existing ELF loader, that
can be used on platforms that do not support loading Mach-O dynamic
libraries via dlopen().

Other changes:

* Renames the --force-load-elf-from-memory command line argument
  to --force-load-from-memory.
* Use CPU_TYPE_ANY and CPU_SUBTYPE_ANY for architectures that do
  not have specific constants in <mach/machine.h> (e.g., RISCV),
  as the snapshot header check after loading also catches architecture
  mismatches.
* Emit the unwinding information at the end of the text segment
  for Windows Mach-O snapshots as is done for ELF ones.

TEST=vm/dart/unobfuscated_static_symbols_test
     vm/dart/use_dwarf_stack_traces_flag_test

Issue: https://github.com/dart-lang/sdk/issues/60307
Change-Id: I34a2a334f47d18d5c4f4a712956e71fd0ac94024
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-mac-release-arm64-try,vm-aot-mac-release-arm64-try,vm-aot-mac-release-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try,vm-fuchsia-release-x64-try,vm-fuchsia-release-arm64-try,vm-linux-debug-ia32-try,vm-aot-linux-debug-simarm_x64-try,vm-aot-linux-debug-simriscv32-try,vm-aot-linux-debug-simriscv64-try,vm-aot-linux-release-simarm_x64-try,vm-gcc-linux-try,vm-ubsan-linux-release-arm64-try,vm-aot-win-release-arm64-try,vm-aot-win-release-x64-try,vm-win-release-x64-try,vm-win-release-arm64-try,vm-aot-win-debug-arm64-try,vm-win-debug-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/430100
Reviewed-by: Slava Egorov <vegorov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
2025-06-03 05:56:59 -07:00
Tess Strickland 6b53073eae Reland "[vm, gen_snapshot] Add app-aot-macho-dylib option for AOT snapshots."
This is a reland of commit 38ef28a058

Fixes:

* Fix comparisons in ASSERT_EQUAL statements on 32-bit architectures.
* Take simulated architectures into account when deciding whether
  to use dlopen() for native shared object formats.
* Fix struct/field name collision for GCC.
* Use CPU_TYPE_ANY/CPU_SUBTYPE_ANY for architectures that do not
  have more specific cpu_type_t/cpu_subtype_t constants defined.

Original change's description:
> [vm, gen_snapshot] Add app-aot-macho-dylib option for AOT snapshots.
>
> This is the initial framework for creating snapshots as Mach-O dynamic
> libraries. Note that this framework is not 100% feature complete
> compared to generating Mach-O snapshots via assembly. In particular,
> the directly-compiled Mach-O dylib does not yet contain compact
> unwinding information.
>
> Other changes:
>
> * Adds UuidCommand to the native_stack_traces package's Mach-O reader,
>   which now appropriately returns the UUID as the build ID for Mach-O
>   shared objects.
>
> * Adds Utils::Basename(path) for portably retrieving the basename
>   from a path. (Returns nullptr for all arguments where it is not
>   currently implemented on Fuchsia or Windows.)
>
> * Adjusts vm/timeline.h to avoid pulling in <mach_o/loader.h> on MacOS,
>   as that interferes with uses of the namespaced Mach-O definitions
>   in platform/mach_o.h.
>
> * Only attempt to dlopen() a snapshot if ELF is the native format
>   for the host platform or the snapshot is not an ELF shared object.
>   If dlopen() is used, report the error message if it fails rather
>   than attempting to manually load the snapshot as an ELF shared object.
>
> * Fix the magic number stored in DylibAppSnapshot for loaded non-ELF
>   dynamic libraries.
>
> * Remove the detection of reverse-endian Mach-O magic numbers in
>   DartUtils::SniffForMagicNumber(), since all our Mach-O related code
>   assumes host-endian Mach-O files and so there's no point other than
>   to give a slightly better error message when failing.
>
> TEST=vm/dart/exported_symbols_test
>      vm/dart/unobfuscated_static_symbols_test
>      vm/dart/use_dwarf_stack_traces_flag_test
>      vm/cc/CanDetectMachOFiles
>
> Issue: https://github.com/dart-lang/sdk/issues/60307
> Change-Id: Idf5b49d6c6d035ab033509613212b95520d65965
> Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-mac-release-arm64-try,vm-aot-mac-release-arm64-try,vm-aot-mac-release-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try,vm-fuchsia-release-x64-try,vm-fuchsia-release-arm64-try
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/415020
> Reviewed-by: Slava Egorov <vegorov@google.com>
> Commit-Queue: Tess Strickland <sstrickl@google.com>

TEST=vm/dart/exported_symbols_test
     vm/dart/unobfuscated_static_symbols_test
     vm/dart/use_dwarf_stack_traces_flag_test
     vm/cc/CanDetectMachOFiles
     ci on trybots that failed on the original CL

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Change-Id: Iaffea0ddc6173100c8b5b2a9fe46c45f4f611a2e
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Commit-Queue: Tess Strickland <sstrickl@google.com>
2025-05-27 06:30:20 -07:00
Tess Strickland 38ea3a8f5e Revert "[vm, gen_snapshot] Add app-aot-macho-dylib option for AOT snapshots."
This reverts commit 38ef28a058.

Reason for revert: Breaks build on debug mode 32-bit arches,
                   release mode simarm_x64

Issue: https://github.com/dart-lang/sdk/issues/60307
Original change's description:
> [vm, gen_snapshot] Add app-aot-macho-dylib option for AOT snapshots.
>
> This is the initial framework for creating snapshots as Mach-O dynamic
> libraries. Note that this framework is not 100% feature complete
> compared to generating Mach-O snapshots via assembly. In particular,
> the directly-compiled Mach-O dylib does not yet contain compact
> unwinding information.
>
> Other changes:
>
> * Adds UuidCommand to the native_stack_traces package's Mach-O reader,
>   which now appropriately returns the UUID as the build ID for Mach-O
>   shared objects.
>
> * Adds Utils::Basename(path) for portably retrieving the basename
>   from a path. (Returns nullptr for all arguments where it is not
>   currently implemented on Fuchsia or Windows.)
>
> * Adjusts vm/timeline.h to avoid pulling in <mach_o/loader.h> on MacOS,
>   as that interferes with uses of the namespaced Mach-O definitions
>   in platform/mach_o.h.
>
> * Only attempt to dlopen() a snapshot if ELF is the native format
>   for the host platform or the snapshot is not an ELF shared object.
>   If dlopen() is used, report the error message if it fails rather
>   than attempting to manually load the snapshot as an ELF shared object.
>
> * Fix the magic number stored in DylibAppSnapshot for loaded non-ELF
>   dynamic libraries.
>
> * Remove the detection of reverse-endian Mach-O magic numbers in
>   DartUtils::SniffForMagicNumber(), since all our Mach-O related code
>   assumes host-endian Mach-O files and so there's no point other than
>   to give a slightly better error message when failing.
>
> TEST=vm/dart/exported_symbols_test
>      vm/dart/unobfuscated_static_symbols_test
>      vm/dart/use_dwarf_stack_traces_flag_test
>      vm/cc/CanDetectMachOFiles
>
> Issue: https://github.com/dart-lang/sdk/issues/60307
> Change-Id: Idf5b49d6c6d035ab033509613212b95520d65965
> Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-mac-release-arm64-try,vm-aot-mac-release-arm64-try,vm-aot-mac-release-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try,vm-fuchsia-release-x64-try,vm-fuchsia-release-arm64-try
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/415020
> Reviewed-by: Slava Egorov <vegorov@google.com>
> Commit-Queue: Tess Strickland <sstrickl@google.com>

Issue: https://github.com/dart-lang/sdk/issues/60307
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Change-Id: Iff2ab4c84a513a184784129f456bd357ae8e3a67
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Auto-Submit: Tess Strickland <sstrickl@google.com>
2025-05-27 01:05:48 -07:00
Tess Strickland 38ef28a058 [vm, gen_snapshot] Add app-aot-macho-dylib option for AOT snapshots.
This is the initial framework for creating snapshots as Mach-O dynamic
libraries. Note that this framework is not 100% feature complete
compared to generating Mach-O snapshots via assembly. In particular,
the directly-compiled Mach-O dylib does not yet contain compact
unwinding information.

Other changes:

* Adds UuidCommand to the native_stack_traces package's Mach-O reader,
  which now appropriately returns the UUID as the build ID for Mach-O
  shared objects.

* Adds Utils::Basename(path) for portably retrieving the basename
  from a path. (Returns nullptr for all arguments where it is not
  currently implemented on Fuchsia or Windows.)

* Adjusts vm/timeline.h to avoid pulling in <mach_o/loader.h> on MacOS,
  as that interferes with uses of the namespaced Mach-O definitions
  in platform/mach_o.h.

* Only attempt to dlopen() a snapshot if ELF is the native format
  for the host platform or the snapshot is not an ELF shared object.
  If dlopen() is used, report the error message if it fails rather
  than attempting to manually load the snapshot as an ELF shared object.

* Fix the magic number stored in DylibAppSnapshot for loaded non-ELF
  dynamic libraries.

* Remove the detection of reverse-endian Mach-O magic numbers in
  DartUtils::SniffForMagicNumber(), since all our Mach-O related code
  assumes host-endian Mach-O files and so there's no point other than
  to give a slightly better error message when failing.

TEST=vm/dart/exported_symbols_test
     vm/dart/unobfuscated_static_symbols_test
     vm/dart/use_dwarf_stack_traces_flag_test
     vm/cc/CanDetectMachOFiles

Issue: https://github.com/dart-lang/sdk/issues/60307
Change-Id: Idf5b49d6c6d035ab033509613212b95520d65965
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-mac-release-arm64-try,vm-aot-mac-release-arm64-try,vm-aot-mac-release-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try,vm-fuchsia-release-x64-try,vm-fuchsia-release-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/415020
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
2025-05-26 08:52:26 -07:00
Tess Strickland 9a2234461a [vm] Use a non-native definition of the runtime function structure.
Attempting to use the native definition when available causes problems
when cross-compiling, and the original attempts to avoid this broke in
subtle ways. Instead, just make a non-native definition that mimics
the native definition and use that with reinterpret_casts when sending
uses of the non-native definition to Windows API calls that expect
a value of the native definition.

TEST=windows ci

Fixes: https://github.com/dart-lang/sdk/issues/60771
Change-Id: I347fcaf8cccd809a3d8e6f041cc7e360b0b8226e
Cq-Include-Trybots: luci.dart.try:vm-aot-win-release-arm64-try,vm-aot-win-release-x64-try,vm-win-release-arm64-try,vm-win-release-x64-try,vm-aot-win-debug-arm64-try,vm-aot-win-debug-x64-try,pkg-win-release-try,pkg-win-release-arm64-try,dart-sdk-win-try,dart-sdk-win-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/430400
Reviewed-by: Slava Egorov <vegorov@google.com>
2025-05-23 06:19:16 -07:00
Tess Strickland 84a1b114cd [vm] Add base class for shared object writers.
This CL pulls out the refactorings used to support the new MachOWriter
in a followup CL to allow them to be reviewed separately.

Rename Elf -> ElfWriter. Also rename model classes used by ElfWriter
for concepts that exist both in ELF and Mach-O to ElfX. For example,
the old ELF-specific SymbolTable is renamed to ElfSymbolTable.

Adds SharedObjectWriter to serve as a base class for both ElfWriter
and the upcoming MachOWriter.

Adds a new AbstractWriteStream that serves as a common superclass
of both BaseWriteStream and SharedObjectWriter::WriteStream and
allows the creation of fully delegating WriteStreams that do not
maintain a local buffer.

Abstract the old Elf::SymbolData class into
SharedObjectWriter::SymbolData, which stores an enum value as the type
of the symbol instead of storing the ELF encoding of the type.

Rename the DwarfElfStream (which actually wasn't ELF specific, as
all the ELF-specific DWARF information is handled by ElfWriter) to
DwarfSharedObjectStream and put it in a separate header file.

Rename Image::compiled_to_elf() to Image::compiled_to_shared_object()
and add a separate Image::compiled_to_elf() that checks for the ELF
magic value at the DSO base. Also add Image::shared_object_start()
and Image::build_id_start() to return pointers to the DSO base and
the build ID note, respectively.

Refactor Image::build_id() and Image::build_id_length() to check
compiled_for_elf() prior to decoding the data pointed to by
build_id_start() as an ELF note section.

Create an AOTSnapshotType enum to specific the snapshot writer to use
in CreateAppAOTSnapshot instead of using an as_elf boolean.

TEST=refactorings, so existing tests on ci

Change-Id: Ia3ab37a4dff93b6e00390b123753be5a51fbdaaa
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-x64-try,vm-aot-mac-release-arm64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-debug-x64-try,vm-mac-debug-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/421301
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
2025-05-21 01:36:22 -07:00
Ryan Macnak 57ee563bc9 Roll Clang from 0454dd8c48cd to 8c7a2ce01a77
TEST=ci
Cq-Include-Trybots: luci.dart.try:dart-sdk-linux-try;luci.dart.try:dart-sdk-mac-try;luci.dart.try:dart-sdk-mac-arm64-try;luci.dart.try:dart-sdk-win-try
Change-Id: I9d4e7abe9541f74a67e469c4ba4ba3cecfaec431
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/427280
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2025-05-07 09:22:20 -07:00
Ivan Inozemtsev 29e33b00d0 Reland "watchOS target os"
This is a reland of commit 7ae1d75869

TEST=manual, no watchOS SDK on bots yet.

Original change's description:
> watchOS target os
>
> - add support for --os=watchos | --os=watchos_simulator
> - do not depend on perfetto if dart_support_perfetto is false
> - change the default value for dart_support_perfetto to !is_watchos
>
> To minimize changes and to avoid modifying third-party zlib BUILD file, is_watchos implies is_ios for now.
>
> TEST=manual, no watchOS SDK on bots yet.
>
> Cq-Include-Trybots: luci.dart.try:vm-mac-debug-arm64-try,vm-mac-release-arm64-try
> Change-Id: If2130068ef546162a07a9ba53f94b11ff25fb565
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/415021
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
> Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>

Cq-Include-Trybots: luci.dart.try:vm-mac-debug-arm64-try,vm-mac-release-arm64-try
Change-Id: I2b50f7eb4da173627aeb4833b88a08712b278d9f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425523
Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
2025-05-05 06:40:30 -07:00
Ivan Inozemtsev 10c579c7e8 Revert "watchOS target os"
This reverts commit 7ae1d75869.

Reason for revert: breaks flutter build

Original change's description:
> watchOS target os
>
> - add support for --os=watchos | --os=watchos_simulator
> - do not depend on perfetto if dart_support_perfetto is false
> - change the default value for dart_support_perfetto to !is_watchos
>
> To minimize changes and to avoid modifying third-party zlib BUILD file, is_watchos implies is_ios for now.
>
> TEST=manual, no watchOS SDK on bots yet.
>
> Cq-Include-Trybots: luci.dart.try:vm-mac-debug-arm64-try,vm-mac-release-arm64-try
> Change-Id: If2130068ef546162a07a9ba53f94b11ff25fb565
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/415021
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
> Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>

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Change-Id: I4bede9ede04ac3c533b8ff7ae2f1adbd84eb2397
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425262
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2025-04-29 03:21:37 -07:00
Ivan Inozemtsev 7ae1d75869 watchOS target os
- add support for --os=watchos | --os=watchos_simulator
- do not depend on perfetto if dart_support_perfetto is false
- change the default value for dart_support_perfetto to !is_watchos

To minimize changes and to avoid modifying third-party zlib BUILD file, is_watchos implies is_ios for now.

TEST=manual, no watchOS SDK on bots yet.

Cq-Include-Trybots: luci.dart.try:vm-mac-debug-arm64-try,vm-mac-release-arm64-try
Change-Id: If2130068ef546162a07a9ba53f94b11ff25fb565
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Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
2025-04-29 02:28:52 -07:00
Derek Xu de32acf9ac [VM] Introduce ListQueue class
TEST=list_queue_test.cc

Change-Id: Ie85055475f35a9fdc4f31e61d5f1f5d04eb707a8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/420220
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Derek Xu <derekx@google.com>
2025-04-15 09:07:59 -07:00
Vyacheslav Egorov 5f32e78a09 [vm] Fix running under HWASAN
HWASAN tags stack regions (and stack pointers) with 0,
but also selectively tags some stack allocations with
non-zero tags. These tags need to be cleared when
allocation goes out of scope so that stack can be
later safely reused - otherwise stale tags confuse
HWASAN instrumentation later.

This CL teaches Exceptions::JumpToFrame to do that.

CL also adds basic build changes to support building
with HWASAN, though I don't wire it into CI for now
as it can only really run on Android ARM64

TEST=manually on Android phone and on internal tests

Bug: b/374433249
Change-Id: I678443dc1de693c999a226bee0d71a6f3582d4f9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/421180
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Auto-Submit: Slava Egorov <vegorov@google.com>
2025-04-14 10:14:54 -07:00
Ryan Macnak 383cd496ce [vm] Use dlopen for loading AOT snapshots on Fuchsia.
This will play better with native tooling compared to Dart_LoadELF.

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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/419684
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Zijie He <zijiehe@google.com>
2025-04-02 12:46:55 -07:00
Vyacheslav Egorov 2a437c54a0 [vm] Intern strings when writing Perfetto timeline
Intern the following fields:

* Category names
* Event labels
* Debug annotation keys and values

This significantly reduces the size of the timeline
(e.g. a timeline containing 60k slices goes from 15Mb
to 5Mb timeline)

This relands commit f2614d24f8
with a fix for Android build.

TEST=ci and manually

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2025-03-27 06:44:23 -07:00
Vyacheslav Egorov f9e5b9282b Revert "[vm] Intern strings when writing Perfetto timeline"
This reverts commit f2614d24f8.

Reason for revert: Android build broken

Original change's description:
> [vm] Intern strings when writing Perfetto timeline
>
> Intern the following fields:
>
> * Category names
> * Event labels
> * Debug annotation keys and values
>
> This significantly reduces the size of the timeline
> (e.g. a timeline containing 60k slices goes from 15Mb
> to 5Mb timeline)
>
> TEST=ci and manually
>
> Change-Id: I59e850279b6714b8b75c5b8e79e6a8b0a981a261
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/417202
> Reviewed-by: Derek Xu <derekx@google.com>

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Auto-Submit: Slava Egorov <vegorov@google.com>
2025-03-26 14:26:58 -07:00
Vyacheslav Egorov f2614d24f8 [vm] Intern strings when writing Perfetto timeline
Intern the following fields:

* Category names
* Event labels
* Debug annotation keys and values

This significantly reduces the size of the timeline
(e.g. a timeline containing 60k slices goes from 15Mb
to 5Mb timeline)

TEST=ci and manually

Change-Id: I59e850279b6714b8b75c5b8e79e6a8b0a981a261
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/417202
Reviewed-by: Derek Xu <derekx@google.com>
2025-03-26 14:05:39 -07:00
Ivan Inozemtsev a5077aa352 Reland "Add gen_snapshot binaries, producing Linux ARM64/x64 snapshots"
This is a reland of commit e6d55c6c2f

Reworks guards for 64-bit Windows unwinding support code so that
it is not included in any 64-bit Windows gen_snapshot executable that
targets a non-64-bit Windows platform.

TEST=ci, build only

Original change's description:
> Add gen_snapshot binaries, producing Linux ARM64/x64 snapshots
>
> Inspired by `//runtime/bin:gen_snapshot_fuchsia`, required for go/dart-cross-compile.
>
> TEST=ci, build only
>
> Change-Id: Ie521c984a8f44d25f3f78d946af9416582a572dc
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/410402
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
> Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>

Change-Id: I4f1323ac8f7ab215c2dffeef188f70c466fb62ea
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/413402
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Ivan Inozemtsev <iinozemtsev@google.com>
Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
2025-03-13 07:23:39 -07:00
Vyacheslav Egorov 939699a9cf [vm] Add NOTIFY_DEBUGGER_ABOUT_RX_PAGES hook
Estimated: adds ~500ms of latency per code space page allocation.

TEST=manually

Change-Id: I31bc1927fd9a775c312974a1c435d29c875d01eb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/412281
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
2025-02-28 02:24:38 -08:00
Alexander Markov ebb7e1061c [vm] Use _setjmp instead of setjmp on MacOS/iOS
setjmp is extremely expensive on MacOS/iOS as it always saves
signal mask.

Introduce DART_SETJMP / DART_LONGJMP macros to use _setjmp instead of
setjmp on MacOS/iOS.

DeltaBlue on Mac/arm64 on the interpreter:
179585.3 us -> 58347.9 us. (3x faster)

TEST=ci
Issue: https://github.com/dart-lang/sdk/issues/60205

Change-Id: I2122f2eb4d5de66ae2ef904a7034af1ed09f1d07
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/412320
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
2025-02-26 14:01:44 -08:00
Vyacheslav Egorov 939cdfbfcd [vm] Move bin/lockers.h to platform/lockers.h
We have to place these classes into a platform namespace to avoid
conflicts with vm/lockers.h.

To avoid changes to files in bin we simply change bin/lockers.h
to introduce bin::{Monitor,Mutex}Locker aliases for
platform::{Monitor,Mutex}Locker.

TEST=ci
R=kustermann@google.com

Change-Id: I975f24a8499ea85d0ba887180a81287fcf4101bb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/405460
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
2025-01-23 04:19:48 -08:00
Gabriel Terwesten 903eea6bfb [vm,dartdev] Support dynamic linking between libraries
The same bundling that is used for `dart build` is now also used for
`dart test` and `dart run`, except that the output directory is
`.dart_tool/native_assets`. This way all native code assets are placed
next to each other in the `lib` directory, and loaded from there
instead of loading them in place from where the build/link hooks
placed them. By standardizing on this layout the different modes of
running dart code that support native assets can use the same
mechanisms to support dynamic linking between libraries.

On macOS, install names of dylibs are rewritten to support dynamic
linking, similar to the changes in
https://github.com/flutter/flutter/pull/153054.

On Windows, loading of DLLs is altered so that the directory of the DLL
that is being loaded is considered when loading dependent DLLs.

Tests are added to verify that dynamic linking works as expected.

TEST=pkg/dartdev/test/native_assets/{build,run,test}_test.dart

R=mosum@google.com

Related: https://github.com/dart-lang/native/issues/190
Fixes: https://github.com/dart-lang/sdk/issues/56459
Change-Id: Ie4a41e5b7382ab1cea39e93d29d085bf9986828b
Cq-Include-Trybots: luci.dart.try:pkg-linux-debug-try,pkg-linux-release-arm64-try,pkg-linux-release-try,pkg-mac-release-arm64-try,pkg-mac-release-try,pkg-win-release-arm64-try,pkg-win-release-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/381580
Reviewed-by: Moritz Sümmermann <mosum@google.com>
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
2024-12-06 13:00:12 +00:00
Ryan Macnak 4924cf9dab [vm] Fill in ELF attributes for RISC-V.
TEST=readelf
Change-Id: Ida1069f12998c8d12750d23843a7f964bf618077
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/396100
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
2024-11-19 17:49:09 +00:00
Ryan Macnak e3987ed32f [vm] Add the RISC-V Zfa extension.
TEST=ci, local qemu
Change-Id: Ifede459753ed76b3b01f09d0c0cff1c8b09bba04
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/394567
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
2024-11-13 00:57:46 +00:00
Ryan Macnak 9e28e19002 [test] Synthetic versions of the mutator-marker race.
TEST=vm/cc/MutatorMarkerRace_*
Bug: https://github.com/dart-lang/sdk/issues/56895
Change-Id: I3e3f25b2c43aec09a409377f77c6d2fec287bccb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/390263
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
2024-10-24 03:24:08 +00:00