2085       } else {
2086         warning("Concurrent code cache evacuation is enabled, but barriers for constants are disabled. "
2087                 "This may lead to surprising crashes.");
2088       }
2089     }
2090   } else {
2091     if (ShenandoahBarriersForConst) {
2092       if (FLAG_IS_DEFAULT(ShenandoahBarriersForConst)) {
2093         warning("Concurrent code cache evacuation is disabled, disabling barriers for constants.");
2094         FLAG_SET_DEFAULT(ShenandoahBarriersForConst, false);
2095       }
2096     }
2097   }
2098 
2099   if (ShenandoahAlwaysPreTouch) {
2100     if (!FLAG_IS_DEFAULT(ShenandoahUncommitDelay)) {
2101       warning("AlwaysPreTouch is enabled, disabling ShenandoahUncommitDelay");
2102     }
2103     FLAG_SET_DEFAULT(ShenandoahUncommitDelay, max_uintx);
2104   }
2105 
2106   if (UseStringDeduplication) {
2107     warning("String Deduplication is unstable with Shenandoah, forcefully disabled.");
2108     FLAG_SET_DEFAULT(UseStringDeduplication, false);
2109   }
2110 }
2111 
2112 void Arguments::set_gc_specific_flags() {
2113 #if INCLUDE_ALL_GCS
2114   // Set per-collector flags
2115   if (UseParallelGC || UseParallelOldGC) {
2116     set_parallel_gc_flags();
2117   } else if (UseConcMarkSweepGC) {
2118     set_cms_and_parnew_gc_flags();
2119   } else if (UseG1GC) {
2120     set_g1_gc_flags();
2121   } else if (UseShenandoahGC) {
2122     set_shenandoah_gc_flags();
2123   }
2124   if (AssumeMP && !UseSerialGC) {
2125     if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
2126       warning("If the number of processors is expected to increase from one, then"
2127               " you should configure the number of parallel GC threads appropriately"
2128               " using -XX:ParallelGCThreads=N");
2129     }

2085       } else {
2086         warning("Concurrent code cache evacuation is enabled, but barriers for constants are disabled. "
2087                 "This may lead to surprising crashes.");
2088       }
2089     }
2090   } else {
2091     if (ShenandoahBarriersForConst) {
2092       if (FLAG_IS_DEFAULT(ShenandoahBarriersForConst)) {
2093         warning("Concurrent code cache evacuation is disabled, disabling barriers for constants.");
2094         FLAG_SET_DEFAULT(ShenandoahBarriersForConst, false);
2095       }
2096     }
2097   }
2098 
2099   if (ShenandoahAlwaysPreTouch) {
2100     if (!FLAG_IS_DEFAULT(ShenandoahUncommitDelay)) {
2101       warning("AlwaysPreTouch is enabled, disabling ShenandoahUncommitDelay");
2102     }
2103     FLAG_SET_DEFAULT(ShenandoahUncommitDelay, max_uintx);
2104   }





2105 }
2106 
2107 void Arguments::set_gc_specific_flags() {
2108 #if INCLUDE_ALL_GCS
2109   // Set per-collector flags
2110   if (UseParallelGC || UseParallelOldGC) {
2111     set_parallel_gc_flags();
2112   } else if (UseConcMarkSweepGC) {
2113     set_cms_and_parnew_gc_flags();
2114   } else if (UseG1GC) {
2115     set_g1_gc_flags();
2116   } else if (UseShenandoahGC) {
2117     set_shenandoah_gc_flags();
2118   }
2119   if (AssumeMP && !UseSerialGC) {
2120     if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
2121       warning("If the number of processors is expected to increase from one, then"
2122               " you should configure the number of parallel GC threads appropriately"
2123               " using -XX:ParallelGCThreads=N");
2124     }