diff -urN a/deps/v8/src/base/platform/condition-variable.cc b/deps/v8/src/base/platform/condition-variable.cc
--- a/deps/v8/src/base/platform/condition-variable.cc	2019-09-05 00:36:23.000000000 +0900
+++ b/deps/v8/src/base/platform/condition-variable.cc	2019-09-12 15:10:01.063792083 +0900
@@ -16,7 +16,7 @@
 
 ConditionVariable::ConditionVariable() {
 #if (V8_OS_FREEBSD || V8_OS_NETBSD || V8_OS_OPENBSD || \
-     (V8_OS_LINUX && V8_LIBC_GLIBC))
+     V8_OS_LINUX)
   // On Free/Net/OpenBSD and Linux with glibc we can change the time
   // source for pthread_cond_timedwait() to use the monotonic clock.
   pthread_condattr_t attr;
@@ -92,7 +92,7 @@
       &native_handle_, &mutex->native_handle(), &ts);
 #else
 #if (V8_OS_FREEBSD || V8_OS_NETBSD || V8_OS_OPENBSD || \
-     (V8_OS_LINUX && V8_LIBC_GLIBC))
+     V8_OS_LINUX)
   // On Free/Net/OpenBSD and Linux with glibc we can change the time
   // source for pthread_cond_timedwait() to use the monotonic clock.
   result = clock_gettime(CLOCK_MONOTONIC, &ts);
diff -urN a/deps/v8/src/base/platform/platform-posix.cc b/deps/v8/src/base/platform/platform-posix.cc
--- a/deps/v8/src/base/platform/platform-posix.cc	2019-09-05 00:36:23.000000000 +0900
+++ b/deps/v8/src/base/platform/platform-posix.cc	2019-09-12 15:10:01.063792083 +0900
@@ -772,7 +772,7 @@
 #if V8_OS_MACOSX
     // Default on Mac OS X is 512kB -- bump up to 1MB
     stack_size = 1 * 1024 * 1024;
-#elif V8_OS_AIX
+#elif V8_OS_AIX || !defined(__GLIBC__)
     // Default on AIX is 96kB -- bump up to 2MB
     stack_size = 2 * 1024 * 1024;
 #endif
diff -urN a/deps/v8/src/codegen/external-reference-table.cc b/deps/v8/src/codegen/external-reference-table.cc
--- a/deps/v8/src/codegen/external-reference-table.cc	2019-09-05 00:36:23.000000000 +0900
+++ b/deps/v8/src/codegen/external-reference-table.cc	2019-09-12 15:09:41.959828134 +0900
@@ -9,7 +9,7 @@
 #include "src/ic/stub-cache.h"
 #include "src/logging/counters.h"
 
-#if defined(DEBUG) && defined(V8_OS_LINUX) && !defined(V8_OS_ANDROID)
+#if defined(DEBUG) && defined(V8_OS_LINUX) && !defined(V8_OS_ANDROID) && defined(V8_LIBC_GLIBC)
 #define SYMBOLIZE_FUNCTION
 #include <execinfo.h>
 #include <vector>
diff -urN a/deps/v8/src/compiler-dispatcher/optimizing-compile-dispatcher.cc b/deps/v8/src/compiler-dispatcher/optimizing-compile-dispatcher.cc
--- a/deps/v8/src/compiler-dispatcher/optimizing-compile-dispatcher.cc	2019-09-05 00:36:23.000000000 +0900
+++ b/deps/v8/src/compiler-dispatcher/optimizing-compile-dispatcher.cc	2019-09-12 15:10:01.063792083 +0900
@@ -134,8 +134,10 @@
     // The function may have already been optimized by OSR.  Simply continue.
     // Use a mutex to make sure that functions marked for install
     // are always also queued.
-    base::MutexGuard access_output_queue_(&output_queue_mutex_);
-    output_queue_.push(job);
+    {
+      base::MutexGuard access_output_queue_(&output_queue_mutex_);
+      output_queue_.push(job);
+    }
   }
 
   isolate_->stack_guard()->RequestInstallCode();