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chore: Treate the prof=true backtrace method as an enum (#2)

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When --enable-prof is set during configure, detection of a suitable
backtrace method is performed stopping with the first supported
solution. This can be augmented by explicitly enabling or disabling
detection of specific methods. To better model this in a bazel context,
the //settings/flags:enable_prof is extended to have enumerable values
where the backtrace method can be explicitly declared.
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Connor 2025-05-03 11:00:26 -06:00 • committed by GitHub
parent 76176f6760
commit db4f5f7461
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4 changed files with 40 additions and 39 deletions
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64
settings/flags/BUILD.bazel
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@ -1,3 +1,4 @@
load("@bazel_skylib//lib:selects.bzl", "selects")
load("@bazel_skylib//rules:common_settings.bzl", "bool_flag", "int_flag", "string_flag", "string_setting")
package(default_visibility = ["//:__subpackages__"])
@ -198,50 +199,47 @@ config_setting(
flag_values = {":enable_zone_allocator": "yes"},
)
# JEMALLOC_PROF
bool_flag(
# JEMALLOC_PROF Enable allocation profiling with specified backtracing implementation
string_flag(
name = "enable_prof",
build_setting_default = False,
build_setting_default = "no",
values = [
"gcc",
"libgcc",
"libunwind",
"no",
],
visibility = ["//visibility:public"],
)
config_setting(
selects.config_setting_group(
name = "prof",
flag_values = {":enable_prof": "True"},
)
# JEMALLOC_PROF_LIBUNWIND
bool_flag(
name = "enable_prof_libunwind",
build_setting_default = False,
visibility = ["//visibility:public"],
match_any = [
":prof_gcc",
":prof_libgcc",
":prof_libunwind",
],
)
config_setting(
name = "prof_libunwind",
flag_values = {":enable_prof_libunwind": "True"},
)
# JEMALLOC_PROF_LIBGCC
bool_flag(
name = "enable_prof_libgcc",
build_setting_default = False,
visibility = ["//visibility:public"],
)
config_setting(
name = "prof_libgcc",
flag_values = {":enable_prof_libgcc": "True"},
name = "no_prof",
flag_values = {":enable_prof": "no"},
)
# JEMALLOC_PROF_GCC
bool_flag(
name = "enable_prof_gcc",
build_setting_default = False,
visibility = ["//visibility:public"],
)
config_setting(
name = "prof_gcc",
flag_values = {":enable_prof_gcc": "True"},
flag_values = {":enable_prof": "gcc"},
)
# JEMALLOC_PROF_LIBUNWIND
config_setting(
name = "prof_libunwind",
flag_values = {":enable_prof": "libunwind"},
)
# JEMALLOC_PROF_LIBGCC
config_setting(
name = "prof_libgcc",
flag_values = {":enable_prof": "libgcc"},
)