diff -up firefox-84.0/build/moz.configure/lto-pgo.configure.pgo firefox-84.0/build/moz.configure/lto-pgo.configure
--- firefox-84.0/build/moz.configure/lto-pgo.configure.pgo 2020-12-10 15:55:41.932635998 +0100
+++ firefox-84.0/build/moz.configure/lto-pgo.configure 2020-12-10 16:01:24.674052547 +0100
@@ -228,13 +228,13 @@ def lto(value, c_compiler, ld64_known_go
cflags.append("-flto")
ldflags.append("-flto")
else:
- cflags.append("-flto=thin")
- ldflags.append("-flto=thin")
+ cflags.append("-flto")
+ ldflags.append("-flto")
elif c_compiler.type == "clang-cl":
if len(value) and value[0].lower() == "full":
cflags.append("-flto")
else:
- cflags.append("-flto=thin")
+ cflags.append("-flto")
# With clang-cl, -flto can only be used with -c or -fuse-ld=lld.
# AC_TRY_LINKs during configure don't have -c, so pass -fuse-ld=lld.
cflags.append("-fuse-ld=lld")
@@ -268,7 +268,7 @@ def lto(value, c_compiler, ld64_known_go
if len(value) and value[0].lower() == "full":
cflags.append("-flto")
else:
- cflags.append("-flto=thin")
+ cflags.append("-flto")
cflags.append("-flifetime-dse=1")
ldflags.append("-flto=%s" % num_cores)
diff -up firefox-84.0/build/pgo/profileserver.py.pgo firefox-84.0/build/pgo/profileserver.py
--- firefox-84.0/build/pgo/profileserver.py.pgo 2020-12-07 23:32:58.000000000 +0100
+++ firefox-84.0/build/pgo/profileserver.py 2020-12-10 16:05:16.278668657 +0100
@@ -11,7 +11,7 @@ import glob
import subprocess
import mozcrash
-from mozbuild.base import MozbuildObject, BinaryNotFoundException
+from mozbuild.base import MozbuildObject, BinaryNotFoundException, BuildEnvironmentNotFoundException
from mozfile import TemporaryDirectory
from mozhttpd import MozHttpd
from mozprofile import FirefoxProfile, Preferences
@@ -87,9 +87,22 @@ if __name__ == "__main__":
locations = ServerLocations()
locations.add_host(host="127.0.0.1", port=PORT, options="primary,privileged")
- old_profraw_files = glob.glob("*.profraw")
- for f in old_profraw_files:
- os.remove(f)
+ using_gcc = False
+ try:
+ if build.config_environment.substs.get('CC_TYPE') == 'gcc':
+ using_gcc = True
+ except BuildEnvironmentNotFoundException:
+ pass
+
+ if using_gcc:
+ for dirpath, _, filenames in os.walk('.'):
+ for f in filenames:
+ if f.endswith('.gcda'):
+ os.remove(os.path.join(dirpath, f))
+ else:
+ old_profraw_files = glob.glob('*.profraw')
+ for f in old_profraw_files:
+ os.remove(f)
with TemporaryDirectory() as profilePath:
# TODO: refactor this into mozprofile
@@ -212,6 +225,10 @@ if __name__ == "__main__":
print("Firefox exited successfully, but produced a crashreport")
sys.exit(1)
+ print('Copying profile data....')
+ os.system('pwd');
+ os.system('tar cf profdata.tar.gz `find . -name "*.gcda"`; cd ..; tar xf instrumented/profdata.tar.gz;');
+
llvm_profdata = env.get("LLVM_PROFDATA")
if llvm_profdata:
profraw_files = glob.glob("*.profraw")
diff -up firefox-84.0/build/unix/mozconfig.unix.pgo firefox-84.0/build/unix/mozconfig.unix
--- firefox-84.0/build/unix/mozconfig.unix.pgo 2020-12-07 23:32:58.000000000 +0100
+++ firefox-84.0/build/unix/mozconfig.unix 2020-12-10 15:55:41.933636031 +0100
@@ -6,6 +6,15 @@ if [ -n "$FORCE_GCC" ]; then
CC="$MOZ_FETCHES_DIR/gcc/bin/gcc"
CXX="$MOZ_FETCHES_DIR/gcc/bin/g++"
+ if [ -n "$MOZ_PGO" ]; then
+ if [ -z "$USE_ARTIFACT" ]; then
+ ac_add_options --enable-lto
+ fi
+ export AR="$topsrcdir/gcc/bin/gcc-ar"
+ export NM="$topsrcdir/gcc/bin/gcc-nm"
+ export RANLIB="$topsrcdir/gcc/bin/gcc-ranlib"
+ fi
+
# We want to make sure we use binutils and other binaries in the tooltool
# package.
mk_add_options "export PATH=$MOZ_FETCHES_DIR/gcc/bin:$PATH"
diff -up firefox-84.0/extensions/spellcheck/src/moz.build.pgo firefox-84.0/extensions/spellcheck/src/moz.build
--- firefox-84.0/extensions/spellcheck/src/moz.build.pgo 2020-12-10 15:55:41.933636031 +0100
+++ firefox-84.0/extensions/spellcheck/src/moz.build 2020-12-10 16:16:05.897011122 +0100
@@ -31,3 +31,5 @@ EXPORTS.mozilla += [
if CONFIG["CC_TYPE"] in ("clang", "gcc"):
CXXFLAGS += ["-Wno-error=shadow"]
+
+CXXFLAGS += ['-fno-devirtualize']
diff -up firefox-84.0/python/mozbuild/mozbuild/build_commands.py.pgo firefox-84.0/python/mozbuild/mozbuild/build_commands.py
--- firefox-84.0/python/mozbuild/mozbuild/build_commands.py.pgo 2020-12-10 15:55:41.933636031 +0100
+++ firefox-84.0/python/mozbuild/mozbuild/build_commands.py 2020-12-10 16:14:30.017272529 +0100
@@ -126,9 +126,8 @@ class Build(MachCommandBase):
return status
pgo_env = os.environ.copy()
- pgo_env["LLVM_PROFDATA"] = instr.config_environment.substs.get(
- "LLVM_PROFDATA"
- )
+ if instr.config_environment.substs.get('CC_TYPE') != 'gcc':
+ pgo_env["LLVM_PROFDATA"] = instr.config_environment.substs.get("LLVM_PROFDATA")
pgo_env["JARLOG_FILE"] = mozpath.join(orig_topobjdir, "jarlog/en-US.log")
pgo_cmd = [
instr.virtualenv_manager.python_path,
diff -up firefox-84.0/toolkit/components/terminator/nsTerminator.cpp.pgo firefox-84.0/toolkit/components/terminator/nsTerminator.cpp
--- firefox-84.0/toolkit/components/terminator/nsTerminator.cpp.pgo 2020-12-07 23:33:08.000000000 +0100
+++ firefox-84.0/toolkit/components/terminator/nsTerminator.cpp 2020-12-10 15:55:41.933636031 +0100
@@ -418,6 +418,11 @@ void nsTerminator::StartWatchdog() {
}
#endif
+ // Disable watchdog for PGO train builds - writting profile information at
+ // exit may take time and it is better to make build hang rather than
+ // silently produce poorly performing binary.
+ crashAfterMS = INT32_MAX;
+
UniquePtr<Options> options(new Options());
const PRIntervalTime ticksDuration = PR_MillisecondsToInterval(1000);
options->crashAfterTicks = crashAfterMS / ticksDuration;