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Add swift.checked_exclusivity feature #1352

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Merged
merged 1 commit into from
Oct 7, 2024
Merged

Add swift.checked_exclusivity feature #1352

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4 changes: 4 additions & 0 deletions swift/internal/feature_names.bzl
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Original file line number Diff line number Diff line change
Expand Up @@ -325,6 +325,10 @@ SWIFT_FEATURE_OBJC_LINK_FLAGS = "swift.objc_link_flag"
# all Swift compilations to always be linked.
SWIFT_FEATURE__FORCE_ALWAYSLINK_TRUE = "swift._force_alwayslink_true"

# If enabled, requests the `-enforce-exclusivity=checked` swiftc flag which
# enables runtime checking of exclusive memory access on mutation.
SWIFT_FEATURE_CHECKED_EXCLUSIVITY = "swift.checked_exclusivity"

# Disables Swift sandbox which prevents issues with nested sandboxing when Swift code contains system-provided macros.
# If enabled '#Preview' macro provided by SwiftUI fails to build and probably other system-provided macros.
# Enabled by default for Swift 5.10+ on macOS.
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8 changes: 8 additions & 0 deletions swift/toolchains/config/compile_config.bzl
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Expand Up @@ -34,6 +34,7 @@ load(
load(
"//swift/internal:feature_names.bzl",
"SWIFT_FEATURE_CACHEABLE_SWIFTMODULES",
"SWIFT_FEATURE_CHECKED_EXCLUSIVITY",
"SWIFT_FEATURE_CODEVIEW_DEBUG_INFO",
"SWIFT_FEATURE_COVERAGE",
"SWIFT_FEATURE_COVERAGE_PREFIX_MAP",
Expand Down Expand Up @@ -249,6 +250,13 @@ def compile_action_configs(
configurators = [_emit_objc_header_path_configurator],
),

# Configure enforce exclusivity checks if enabled.
ActionConfigInfo(
actions = [SWIFT_ACTION_COMPILE],
configurators = [add_arg("-enforce-exclusivity=checked")],
features = [SWIFT_FEATURE_CHECKED_EXCLUSIVITY],
),

# Configure Const value extraction.
ActionConfigInfo(
actions = [SWIFT_ACTION_COMPILE],
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