37 #include "gc/shared/gcConfig.hpp"
38 #include "gc/shared/stringdedup/stringDedup.hpp"
39 #include "gc/shared/tlab_globals.hpp"
40 #include "jvm.h"
41 #include "logging/log.hpp"
42 #include "logging/logConfiguration.hpp"
43 #include "logging/logStream.hpp"
44 #include "logging/logTag.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "nmt/nmtCommon.hpp"
47 #include "oops/compressedKlass.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/objLayout.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "prims/jvmtiAgentList.hpp"
52 #include "prims/jvmtiExport.hpp"
53 #include "runtime/arguments.hpp"
54 #include "runtime/flags/jvmFlag.hpp"
55 #include "runtime/flags/jvmFlagAccess.hpp"
56 #include "runtime/flags/jvmFlagLimit.hpp"
57 #include "runtime/globals_extension.hpp"
58 #include "runtime/java.hpp"
59 #include "runtime/os.hpp"
60 #include "runtime/safepoint.hpp"
61 #include "runtime/safepointMechanism.hpp"
62 #include "runtime/synchronizer.hpp"
63 #include "runtime/vm_version.hpp"
64 #include "services/management.hpp"
65 #include "utilities/align.hpp"
66 #include "utilities/debug.hpp"
67 #include "utilities/defaultStream.hpp"
68 #include "utilities/macros.hpp"
69 #include "utilities/parseInteger.hpp"
70 #include "utilities/powerOfTwo.hpp"
71 #include "utilities/stringUtils.hpp"
72 #include "utilities/systemMemoryBarrier.hpp"
73 #if INCLUDE_JFR
74 #include "jfr/jfr.hpp"
75 #endif
76
77 static const char _default_java_launcher[] = "generic";
78
79 #define DEFAULT_JAVA_LAUNCHER _default_java_launcher
80
81 char* Arguments::_jvm_flags_file = nullptr;
82 char** Arguments::_jvm_flags_array = nullptr;
83 int Arguments::_num_jvm_flags = 0;
84 char** Arguments::_jvm_args_array = nullptr;
85 int Arguments::_num_jvm_args = 0;
86 unsigned int Arguments::_addmods_count = 0;
87 char* Arguments::_java_command = nullptr;
88 SystemProperty* Arguments::_system_properties = nullptr;
89 size_t Arguments::_conservative_max_heap_alignment = 0;
90 Arguments::Mode Arguments::_mode = _mixed;
91 const char* Arguments::_java_vendor_url_bug = nullptr;
92 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
93 bool Arguments::_executing_unit_tests = false;
94
95 // These parameters are reset in method parse_vm_init_args()
96 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2625
2626 #ifndef COMPILER2
2627 // Don't degrade server performance for footprint
2628 if (FLAG_IS_DEFAULT(UseLargePages) &&
2629 MaxHeapSize < LargePageHeapSizeThreshold) {
2630 // No need for large granularity pages w/small heaps.
2631 // Note that large pages are enabled/disabled for both the
2632 // Java heap and the code cache.
2633 FLAG_SET_DEFAULT(UseLargePages, false);
2634 }
2635
2636 UNSUPPORTED_OPTION(ProfileInterpreter);
2637 #endif // !COMPILER2
2638
2639 // Parse the CompilationMode flag
2640 if (!CompilationModeFlag::initialize()) {
2641 return JNI_ERR;
2642 }
2643
2644 // Called after ClassLoader::lookup_vm_options() but before class loading begins.
2645 // TODO: Obtain and pass correct preview mode flag value here.
2646 ClassLoader::set_preview_mode(false);
2647
2648 if (!check_vm_args_consistency()) {
2649 return JNI_ERR;
2650 }
2651
2652
2653 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
2654 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
2655 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
2656
2657 return JNI_OK;
2658 }
2659
2660 // Helper class for controlling the lifetime of JavaVMInitArgs
2661 // objects. The contents of the JavaVMInitArgs are guaranteed to be
2662 // deleted on the destruction of the ScopedVMInitArgs object.
2663 class ScopedVMInitArgs : public StackObj {
2664 private:
2665 JavaVMInitArgs _args;
2666 char* _container_name;
3497 FLAG_SET_DEFAULT(StressSecondarySupers, false);
3498 FLAG_SET_DEFAULT(VerifySecondarySupers, false);
3499 }
3500
3501 #ifdef ZERO
3502 // Clear flags not supported on zero.
3503 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3504 #endif // ZERO
3505
3506 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3507 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3508 DebugNonSafepoints = true;
3509 }
3510
3511 // Treat the odd case where local verification is enabled but remote
3512 // verification is not as if both were enabled.
3513 if (BytecodeVerificationLocal && !BytecodeVerificationRemote) {
3514 log_info(verification)("Turning on remote verification because local verification is on");
3515 FLAG_SET_DEFAULT(BytecodeVerificationRemote, true);
3516 }
3517
3518 #ifndef PRODUCT
3519 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
3520 if (use_vm_log()) {
3521 LogVMOutput = true;
3522 }
3523 }
3524 #endif // PRODUCT
3525
3526 if (PrintCommandLineFlags) {
3527 JVMFlag::printSetFlags(tty);
3528 }
3529
3530 #ifdef COMPILER2
3531 if (!FLAG_IS_DEFAULT(EnableVectorSupport) && !EnableVectorSupport) {
3532 if (!FLAG_IS_DEFAULT(EnableVectorReboxing) && EnableVectorReboxing) {
3533 warning("Disabling EnableVectorReboxing since EnableVectorSupport is turned off.");
3534 }
3535 FLAG_SET_DEFAULT(EnableVectorReboxing, false);
3536
|
37 #include "gc/shared/gcConfig.hpp"
38 #include "gc/shared/stringdedup/stringDedup.hpp"
39 #include "gc/shared/tlab_globals.hpp"
40 #include "jvm.h"
41 #include "logging/log.hpp"
42 #include "logging/logConfiguration.hpp"
43 #include "logging/logStream.hpp"
44 #include "logging/logTag.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "nmt/nmtCommon.hpp"
47 #include "oops/compressedKlass.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/objLayout.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "prims/jvmtiAgentList.hpp"
52 #include "prims/jvmtiExport.hpp"
53 #include "runtime/arguments.hpp"
54 #include "runtime/flags/jvmFlag.hpp"
55 #include "runtime/flags/jvmFlagAccess.hpp"
56 #include "runtime/flags/jvmFlagLimit.hpp"
57 #include "runtime/globals.hpp"
58 #include "runtime/globals_extension.hpp"
59 #include "runtime/java.hpp"
60 #include "runtime/os.hpp"
61 #include "runtime/safepoint.hpp"
62 #include "runtime/safepointMechanism.hpp"
63 #include "runtime/synchronizer.hpp"
64 #include "runtime/vm_version.hpp"
65 #include "services/management.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/debug.hpp"
68 #include "utilities/defaultStream.hpp"
69 #include "utilities/macros.hpp"
70 #include "utilities/parseInteger.hpp"
71 #include "utilities/powerOfTwo.hpp"
72 #include "utilities/stringUtils.hpp"
73 #include "utilities/systemMemoryBarrier.hpp"
74 #if INCLUDE_JFR
75 #include "jfr/jfr.hpp"
76 #endif
77
78 #include <string.h>
79
80 static const char _default_java_launcher[] = "generic";
81
82 #define DEFAULT_JAVA_LAUNCHER _default_java_launcher
83
84 char* Arguments::_jvm_flags_file = nullptr;
85 char** Arguments::_jvm_flags_array = nullptr;
86 int Arguments::_num_jvm_flags = 0;
87 char** Arguments::_jvm_args_array = nullptr;
88 int Arguments::_num_jvm_args = 0;
89 unsigned int Arguments::_addmods_count = 0;
90 char* Arguments::_java_command = nullptr;
91 SystemProperty* Arguments::_system_properties = nullptr;
92 size_t Arguments::_conservative_max_heap_alignment = 0;
93 Arguments::Mode Arguments::_mode = _mixed;
94 const char* Arguments::_java_vendor_url_bug = nullptr;
95 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
96 bool Arguments::_executing_unit_tests = false;
97
98 // These parameters are reset in method parse_vm_init_args()
99 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2628
2629 #ifndef COMPILER2
2630 // Don't degrade server performance for footprint
2631 if (FLAG_IS_DEFAULT(UseLargePages) &&
2632 MaxHeapSize < LargePageHeapSizeThreshold) {
2633 // No need for large granularity pages w/small heaps.
2634 // Note that large pages are enabled/disabled for both the
2635 // Java heap and the code cache.
2636 FLAG_SET_DEFAULT(UseLargePages, false);
2637 }
2638
2639 UNSUPPORTED_OPTION(ProfileInterpreter);
2640 #endif // !COMPILER2
2641
2642 // Parse the CompilationMode flag
2643 if (!CompilationModeFlag::initialize()) {
2644 return JNI_ERR;
2645 }
2646
2647 // Called after ClassLoader::lookup_vm_options() but before class loading begins.
2648 ClassLoader::set_preview_mode(is_valhalla_enabled());
2649
2650 if (!check_vm_args_consistency()) {
2651 return JNI_ERR;
2652 }
2653
2654
2655 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
2656 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
2657 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
2658
2659 return JNI_OK;
2660 }
2661
2662 // Helper class for controlling the lifetime of JavaVMInitArgs
2663 // objects. The contents of the JavaVMInitArgs are guaranteed to be
2664 // deleted on the destruction of the ScopedVMInitArgs object.
2665 class ScopedVMInitArgs : public StackObj {
2666 private:
2667 JavaVMInitArgs _args;
2668 char* _container_name;
3499 FLAG_SET_DEFAULT(StressSecondarySupers, false);
3500 FLAG_SET_DEFAULT(VerifySecondarySupers, false);
3501 }
3502
3503 #ifdef ZERO
3504 // Clear flags not supported on zero.
3505 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3506 #endif // ZERO
3507
3508 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3509 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3510 DebugNonSafepoints = true;
3511 }
3512
3513 // Treat the odd case where local verification is enabled but remote
3514 // verification is not as if both were enabled.
3515 if (BytecodeVerificationLocal && !BytecodeVerificationRemote) {
3516 log_info(verification)("Turning on remote verification because local verification is on");
3517 FLAG_SET_DEFAULT(BytecodeVerificationRemote, true);
3518 }
3519 if (!is_valhalla_enabled()) {
3520 #define WARN_IF_NOT_DEFAULT_FLAG(flag) \
3521 if (!FLAG_IS_DEFAULT(flag)) { \
3522 warning("Preview-specific flag \"%s\" has no effect when --enable-preview is not specified.", #flag); \
3523 }
3524
3525 #define DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(flag) \
3526 WARN_IF_NOT_DEFAULT_FLAG(flag) \
3527 FLAG_SET_DEFAULT(flag, false);
3528
3529 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(InlineTypePassFieldsAsArgs);
3530 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(InlineTypeReturnedAsFields);
3531 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseArrayFlattening);
3532 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseFieldFlattening);
3533 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseNullFreeNonAtomicValueFlattening);
3534 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseNullableAtomicValueFlattening);
3535 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseNullFreeAtomicValueFlattening);
3536 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseNullableNonAtomicValueFlattening);
3537 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseAcmpFastPath);
3538 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(PrintInlineLayout);
3539 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(PrintFlatArrayLayout);
3540 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(IgnoreAssertUnsetFields);
3541 WARN_IF_NOT_DEFAULT_FLAG(FlatArrayElementMaxOops);
3542 WARN_IF_NOT_DEFAULT_FLAG(ForceNonTearable);
3543 #ifdef ASSERT
3544 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(StressCallingConvention);
3545 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(PreloadClasses);
3546 WARN_IF_NOT_DEFAULT_FLAG(PrintInlineKlassFields);
3547 #endif
3548 #ifdef COMPILER1
3549 DEBUG_ONLY(DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(C1UseDelayedFlattenedFieldReads);)
3550 #endif
3551 #ifdef COMPILER2
3552 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseArrayLoadStoreProfile);
3553 DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT(UseACmpProfile);
3554 #endif
3555 #undef DISABLE_FLAG_AND_WARN_IF_NOT_DEFAULT
3556 #undef WARN_IF_NOT_DEFAULT_FLAG
3557 } else {
3558 #define DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING(flag, fallback) \
3559 if (!FLAG_IS_DEFAULT(flag) && !UseArrayFlattening && !UseFieldFlattening) { \
3560 warning("Flattening flag \"%s\" has no effect when all flattening modes are disabled.", #flag); \
3561 FLAG_SET_DEFAULT(flag, fallback); \
3562 }
3563
3564 DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING(UseNullFreeNonAtomicValueFlattening, false);
3565 DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING(UseNullableAtomicValueFlattening, false);
3566 DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING(UseNullFreeAtomicValueFlattening, false);
3567 DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING(UseNullableNonAtomicValueFlattening, false);
3568 DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING(FlatArrayElementMaxOops, 0);
3569 DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING(FlatteningBudget, 0);
3570 #undef DISABLE_FLAG_AND_WARN_IF_NO_FLATTENING
3571 if (is_interpreter_only() && !CDSConfig::is_dumping_archive() && !UseSharedSpaces) {
3572 // Disable calling convention optimizations if inline types are not supported.
3573 // Also these aren't useful in -Xint. However, don't disable them when dumping or using
3574 // the CDS archive, as the values must match between dumptime and runtime.
3575 FLAG_SET_DEFAULT(InlineTypePassFieldsAsArgs, false);
3576 FLAG_SET_DEFAULT(InlineTypeReturnedAsFields, false);
3577 }
3578 if (!UseNullFreeNonAtomicValueFlattening &&
3579 !UseNullableAtomicValueFlattening &&
3580 !UseNullFreeAtomicValueFlattening &&
3581 !UseNullableNonAtomicValueFlattening) {
3582 // Flattening is disabled
3583 FLAG_SET_DEFAULT(UseArrayFlattening, false);
3584 FLAG_SET_DEFAULT(UseFieldFlattening, false);
3585 }
3586 }
3587
3588 #ifndef PRODUCT
3589 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
3590 if (use_vm_log()) {
3591 LogVMOutput = true;
3592 }
3593 }
3594 #endif // PRODUCT
3595
3596 if (PrintCommandLineFlags) {
3597 JVMFlag::printSetFlags(tty);
3598 }
3599
3600 #ifdef COMPILER2
3601 if (!FLAG_IS_DEFAULT(EnableVectorSupport) && !EnableVectorSupport) {
3602 if (!FLAG_IS_DEFAULT(EnableVectorReboxing) && EnableVectorReboxing) {
3603 warning("Disabling EnableVectorReboxing since EnableVectorSupport is turned off.");
3604 }
3605 FLAG_SET_DEFAULT(EnableVectorReboxing, false);
3606
|