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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jan Hubicka <hubicka@ucw.cz>
Date: Sat, 22 Dec 2018 09:32:00 +0200
Subject: [PATCH] Bug 1516081 - Disable watchdog during FDO train
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1516081
---
build/moz.configure/lto-pgo.configure | 4 ++--
toolkit/components/terminator/nsTerminator.cpp | 7 +++++++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/build/moz.configure/lto-pgo.configure b/build/moz.configure/lto-pgo.configure
index de7e424326c47799b7a81f3812d5402f24b6a9f3..61310ce33a3897357a7bf75a1317c66744098c13 100644
--- a/build/moz.configure/lto-pgo.configure
+++ b/build/moz.configure/lto-pgo.configure
@@ -85,7 +85,7 @@ def pgo_flags(compiler, profdata, target_is_windows):
if compiler.type == "gcc":
profile_use = "-fprofile-use"
return namespace(
- gen_cflags=["-fprofile-generate"],
+ gen_cflags=["-fprofile-generate", "-DMOZ_PROFILE_INSTRUMENTATION"],
gen_ldflags=["-fprofile-generate"],
use_cflags=[profile_use, "-fprofile-correction", "-Wcoverage-mismatch"],
use_ldflags=[profile_use],
@@ -99,7 +99,7 @@ def pgo_flags(compiler, profdata, target_is_windows):
else:
gen_ldflags = ["-fprofile-generate"]
- gen_cflags = [prefix + "-fprofile-generate"]
+ gen_cflags = [prefix + "-fprofile-generate", "-DMOZ_PROFILE_INSTRUMENTATION"]
if target_is_windows:
# native llvm-profdata.exe on Windows can't read profile data
# if name compression is enabled (which cross-compiling enables
diff --git a/toolkit/components/terminator/nsTerminator.cpp b/toolkit/components/terminator/nsTerminator.cpp
index 3a8f9f4ba63e64695083a70ccfe38cc8baeb7654..b96d9ef138b42fb114d755218c2622b40d6a3bee 100644
--- a/toolkit/components/terminator/nsTerminator.cpp
+++ b/toolkit/components/terminator/nsTerminator.cpp
@@ -460,6 +460,13 @@ 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.
+#ifdef MOZ_PROFILE_INSTRUMENTATION
+ crashAfterMS = INT32_MAX;
+#endif
+
UniquePtr<Options> options(new Options());
// crashAfterTicks is guaranteed to be > 0 as
// crashAfterMS >= ADDITIONAL_WAIT_BEFORE_CRASH_MS >> HEARTBEAT_INTERVAL_MS
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