代码拉取完成，页面将自动刷新
From dfe3a75cf5c911a68ccd187c57f7d0d1f30f65f9 Mon Sep 17 00:00:00 2001
Date: Wed, 4 Jan 2023 20:41:20 +0800
Subject: 8253495: CDS generates non-deterministic output
---
make/scripts/compare.sh | 8 +-
src/hotspot/share/cds/archiveBuilder.cpp | 5 +-
src/hotspot/share/cds/archiveUtils.hpp | 5 +-
src/hotspot/share/cds/heapShared.cpp | 8 +-
src/hotspot/share/gc/shared/collectedHeap.cpp | 18 ++++-
src/hotspot/share/gc/shared/collectedHeap.hpp | 1 +
src/hotspot/share/prims/jvm.cpp | 20 +++++
src/hotspot/share/runtime/os.cpp | 11 ++-
test/hotspot/jtreg/ProblemList.txt | 1 -
.../jtreg/runtime/cds/DeterministicDump.java | 10 ++-
.../cds/appcds/javaldr/LockDuringDump.java | 4 +-
.../appcds/javaldr/LockDuringDumpAgent.java | 16 +++-
test/lib/jdk/test/lib/cds/CDSOptions.java | 33 ++++++--
13 files changed, 103 insertions(+), 33 deletions(-)
create mode 100644 make/jdk/src/classes/build/tools/classlist/SortClasslist.java
diff --git a/make/scripts/compare.sh b/make/scripts/compare.sh
index 76c3a0684..023299771 100644
--- a/make/scripts/compare.sh
+++ b/make/scripts/compare.sh
@@ -325,7 +325,7 @@ compare_general_files() {
! -name "*.cpl" ! -name "*.pdb" ! -name "*.exp" ! -name "*.ilk" \
! -name "*.lib" ! -name "*.jmod" ! -name "*.exe" \
! -name "*.obj" ! -name "*.o" ! -name "jspawnhelper" ! -name "*.a" \
- ! -name "*.tar.gz" ! -name "*.jsa" ! -name "gtestLauncher" \
+ ! -name "*.tar.gz" ! -name "classes_nocoops.jsa" ! -name "gtestLauncher" \
! -name "*.map" \
| $GREP -v "./bin/" | $SORT | $FILTER)
diff --git a/src/hotspot/share/cds/archiveBuilder.cpp b/src/hotspot/share/cds/archiveBuilder.cpp
index 699926fcf..8e12cdabb 100644
--- a/src/hotspot/share/cds/archiveBuilder.cpp
+++ b/src/hotspot/share/cds/archiveBuilder.cpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -540,7 +540,8 @@ ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref
if (MetaspaceShared::is_in_shared_metaspace(obj)) {
// Don't dump existing shared metadata again.
return point_to_it;
- } else if (ref->msotype() == MetaspaceObj::MethodDataType) {
+ } else if (ref->msotype() == MetaspaceObj::MethodDataType ||
+ ref->msotype() == MetaspaceObj::MethodCountersType) {
return set_to_null;
} else {
if (ref->msotype() == MetaspaceObj::ClassType) {
diff --git a/src/hotspot/share/cds/archiveUtils.hpp b/src/hotspot/share/cds/archiveUtils.hpp
index cdb3d99ab..6d8e0b43a 100644
--- a/src/hotspot/share/cds/archiveUtils.hpp
+++ b/src/hotspot/share/cds/archiveUtils.hpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -30,6 +30,7 @@
#include "memory/virtualspace.hpp"
#include "utilities/bitMap.hpp"
#include "utilities/exceptions.hpp"
+#include "utilities/macros.hpp"
class BootstrapInfo;
class ReservedSpace;
@@ -142,7 +143,7 @@ public:
char* expand_top_to(char* newtop);
char* allocate(size_t num_bytes);
- void append_intptr_t(intptr_t n, bool need_to_mark = false);
+ void append_intptr_t(intptr_t n, bool need_to_mark = false) NOT_CDS_RETURN;
char* base() const { return _base; }
char* top() const { return _top; }
diff --git a/src/hotspot/share/cds/heapShared.cpp b/src/hotspot/share/cds/heapShared.cpp
index 3e50dd750..fd3d199f8 100644
--- a/src/hotspot/share/cds/heapShared.cpp
+++ b/src/hotspot/share/cds/heapShared.cpp
@@ -454,7 +454,7 @@ KlassSubGraphInfo* HeapShared::init_subgraph_info(Klass* k, bool is_full_module_
bool created;
Klass* relocated_k = ArchiveBuilder::get_relocated_klass(k);
KlassSubGraphInfo* info =
- _dump_time_subgraph_info_table->put_if_absent(relocated_k, KlassSubGraphInfo(relocated_k, is_full_module_graph),
+ _dump_time_subgraph_info_table->put_if_absent(k, KlassSubGraphInfo(relocated_k, is_full_module_graph),
&created);
assert(created, "must not initialize twice");
return info;
@@ -462,8 +462,7 @@ KlassSubGraphInfo* HeapShared::init_subgraph_info(Klass* k, bool is_full_module_
KlassSubGraphInfo* HeapShared::get_subgraph_info(Klass* k) {
assert(DumpSharedSpaces, "dump time only");
- Klass* relocated_k = ArchiveBuilder::get_relocated_klass(k);
- KlassSubGraphInfo* info = _dump_time_subgraph_info_table->get(relocated_k);
+ KlassSubGraphInfo* info = _dump_time_subgraph_info_table->get(k);
assert(info != NULL, "must have been initialized");
return info;
}
@@ -624,7 +623,8 @@ struct CopyKlassSubGraphInfoToArchive : StackObj {
(ArchivedKlassSubGraphInfoRecord*)ArchiveBuilder::ro_region_alloc(sizeof(ArchivedKlassSubGraphInfoRecord));
record->init(&info);
- unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary((address)klass);
+ Klass* relocated_k = ArchiveBuilder::get_relocated_klass(klass);
+ unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary((address)relocated_k);
u4 delta = ArchiveBuilder::current()->any_to_offset_u4(record);
_writer->add(hash, delta);
}
diff --git a/src/hotspot/share/gc/shared/collectedHeap.cpp b/src/hotspot/share/gc/shared/collectedHeap.cpp
index 96b3eb946..5a2cb0e51 100644
--- a/src/hotspot/share/gc/shared/collectedHeap.cpp
+++ b/src/hotspot/share/gc/shared/collectedHeap.cpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -405,6 +405,11 @@ size_t CollectedHeap::filler_array_min_size() {
return align_object_size(filler_array_hdr_size()); // align to MinObjAlignment
}
+void CollectedHeap::zap_filler_array_with(HeapWord* start, size_t words, juint value) {
+ Copy::fill_to_words(start + filler_array_hdr_size(),
+ words - filler_array_hdr_size(), value);
+}
+
#ifdef ASSERT
void CollectedHeap::fill_args_check(HeapWord* start, size_t words)
{
@@ -415,8 +420,7 @@ void CollectedHeap::fill_args_check(HeapWord* start, size_t words)
void CollectedHeap::zap_filler_array(HeapWord* start, size_t words, bool zap)
{
if (ZapFillerObjects && zap) {
- Copy::fill_to_words(start + filler_array_hdr_size(),
- words - filler_array_hdr_size(), 0XDEAFBABE);
+ zap_filler_array_with(start, words, 0XDEAFBABE);
}
}
#endif // ASSERT
@@ -433,7 +437,13 @@ CollectedHeap::fill_with_array(HeapWord* start, size_t words, bool zap)
ObjArrayAllocator allocator(Universe::intArrayKlassObj(), words, (int)len, /* do_zero */ false);
allocator.initialize(start);
- DEBUG_ONLY(zap_filler_array(start, words, zap);)
+ if (DumpSharedSpaces) {
+ // This array is written into the CDS archive. Make sure it
+ // has deterministic contents.
+ zap_filler_array_with(start, words, 0);
+ } else {
+ DEBUG_ONLY(zap_filler_array(start, words, zap);)
+ }
}
void
diff --git a/src/hotspot/share/gc/shared/collectedHeap.hpp b/src/hotspot/share/gc/shared/collectedHeap.hpp
index e4d444b8c..b65a490cb 100644
--- a/src/hotspot/share/gc/shared/collectedHeap.hpp
+++ b/src/hotspot/share/gc/shared/collectedHeap.hpp
@@ -143,6 +143,7 @@ class CollectedHeap : public CHeapObj<mtGC> {
static inline size_t filler_array_hdr_size();
static inline size_t filler_array_min_size();
+ static inline void zap_filler_array_with(HeapWord* start, size_t words, juint value);
DEBUG_ONLY(static void fill_args_check(HeapWord* start, size_t words);)
DEBUG_ONLY(static void zap_filler_array(HeapWord* start, size_t words, bool zap = true);)
diff --git a/src/hotspot/share/prims/jvm.cpp b/src/hotspot/share/prims/jvm.cpp
index 8baba8c38..9057cc072 100644
--- a/src/hotspot/share/prims/jvm.cpp
+++ b/src/hotspot/share/prims/jvm.cpp
@@ -2852,6 +2852,26 @@ static void thread_entry(JavaThread* thread, TRAPS) {
JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
+#if INCLUDE_CDS
+ if (DumpSharedSpaces) {
+ // During java -Xshare:dump, if we allow multiple Java threads to
+ // execute in parallel, symbols and classes may be loaded in
+ // random orders which will make the resulting CDS archive
+ // non-deterministic.
+ //
+ // Lucikly, during java -Xshare:dump, it's important to run only
+ // the code in the main Java thread (which is NOT started here) that
+ // creates the module graph, etc. It's safe to not start the other
+ // threads which are launched by class static initializers
+ // (ReferenceHandler, FinalizerThread and CleanerImpl).
+ if (log_is_enabled(Info, cds)) {
+ ResourceMark rm;
+ oop t = JNIHandles::resolve_non_null(jthread);
+ log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
+ }
+ return;
+ }
+#endif
JavaThread *native_thread = NULL;
// We cannot hold the Threads_lock when we throw an exception,
diff --git a/src/hotspot/share/runtime/os.cpp b/src/hotspot/share/runtime/os.cpp
index ef43c3170..2fab965bd 100644
--- a/src/hotspot/share/runtime/os.cpp
+++ b/src/hotspot/share/runtime/os.cpp
@@ -681,11 +681,15 @@ void* os::malloc(size_t size, MEMFLAGS memflags, const NativeCallStack& stack) {
return NULL;
}
- void* const inner_ptr = MemTracker::record_malloc((address)outer_ptr, size, memflags, stack);
-
- DEBUG_ONLY(::memset(inner_ptr, uninitBlockPad, size);)
+ void* const inner_ptr = MemTracker::record_malloc((address)outer_ptr, size, memflags, stack);
+
+ if (DumpSharedSpaces) {
+ // Need to deterministically fill all the alignment gaps in C++ structures.
+ ::memset(inner_ptr, 0, size);
+ } else {
+ DEBUG_ONLY(::memset(inner_ptr, uninitBlockPad, size);)
+ }
DEBUG_ONLY(break_if_ptr_caught(inner_ptr);)
-
return inner_ptr;
}
diff --git a/test/hotspot/jtreg/ProblemList.txt b/test/hotspot/jtreg/ProblemList.txt
index 8d5ea5105..11bbb5545 100644
--- a/test/hotspot/jtreg/ProblemList.txt
+++ b/test/hotspot/jtreg/ProblemList.txt
@@ -89,7 +89,6 @@ applications/jcstress/acqrel.java 8277434 linux-aarch64
# :hotspot_runtime
runtime/cds/appcds/jigsaw/modulepath/ModulePathAndCP_JFR.java 8253437 windows-x64
-runtime/cds/DeterministicDump.java 8253495 generic-all
runtime/InvocationTests/invokevirtualTests.java#current-int 8271125 generic-all
runtime/InvocationTests/invokevirtualTests.java#current-comp 8271125 generic-all
runtime/InvocationTests/invokevirtualTests.java#old-int 8271125 generic-all
diff --git a/test/hotspot/jtreg/runtime/cds/DeterministicDump.java b/test/hotspot/jtreg/runtime/cds/DeterministicDump.java
index 9cdba1fa9..6e8ccffce 100644
--- a/test/hotspot/jtreg/runtime/cds/DeterministicDump.java
+++ b/test/hotspot/jtreg/runtime/cds/DeterministicDump.java
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -54,6 +54,11 @@ public class DeterministicDump {
baseArgs.add("-Xmx128M");
if (Platform.is64bit()) {
+ if (!compressed) {
+ System.out.println("CDS archives with uncompressed oops are still non-deterministic");
+ System.out.println("See https://bugs.openjdk.java.net/browse/JDK-8282828");
+ return;
+ }
// These options are available only on 64-bit.
String sign = (compressed) ? "+" : "-";
baseArgs.add("-XX:" + sign + "UseCompressedOops");
@@ -78,9 +83,12 @@ public class DeterministicDump {
static String dump(ArrayList<String> args, String... more) throws Exception {
String logName = "SharedArchiveFile" + (id++);
String archiveName = logName + ".jsa";
+ String mapName = logName + ".map";
CDSOptions opts = (new CDSOptions())
.addPrefix("-Xlog:cds=debug")
+ .addPrefix("-Xlog:cds+map=trace:file=" + mapName + ":none:filesize=0")
.setArchiveName(archiveName)
+ .addSuffix(args)
.addSuffix(more);
CDSTestUtils.createArchiveAndCheck(opts);
diff --git a/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDump.java b/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDump.java
index d60e0d11a..5dc8dbc08 100644
--- a/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDump.java
+++ b/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDump.java
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -70,7 +70,7 @@ public class LockDuringDump {
TestCommon.testDump(appJar, TestCommon.list(LockDuringDumpApp.class.getName()),
"-XX:+UnlockDiagnosticVMOptions",
agentArg, agentArg2, biasedLock);
- if (i != 0) {
+ if (i != 0 && !out.getStdout().contains("LockDuringDumpAgent timeout")) {
out.shouldContain("Let's hold the lock on the literal string");
}
diff --git a/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDumpAgent.java b/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDumpAgent.java
index 5e053d83e..57db61e93 100644
--- a/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDumpAgent.java
+++ b/test/hotspot/jtreg/runtime/cds/appcds/javaldr/LockDuringDumpAgent.java
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -51,9 +51,21 @@ public class LockDuringDumpAgent implements Runnable {
static void waitForThreadStart() {
try {
+ long started = System.currentTimeMillis();
+ long timeout = 10000;
+ synchronized (LITERAL) {
+ Thread.sleep(1);
+ }
synchronized (lock) {
while (!threadStarted) {
- lock.wait();
+ lock.wait(timeout);
+ long elapsed = System.currentTimeMillis() - started;
+ if (elapsed >= timeout) {
+ System.out.println("This JVM may decide to not launch any Java threads during -Xshare:dump.");
+ System.out.println("This is OK because no string objects could be in a locked state during heap dump.");
+ System.out.println("LockDuringDumpAgent timeout after " + elapsed + " ms");
+ return;
+ }
}
System.out.println("Thread has started");
}
diff --git a/test/lib/jdk/test/lib/cds/CDSOptions.java b/test/lib/jdk/test/lib/cds/CDSOptions.java
index 2fa949dc4..1138b7757 100644
--- a/test/lib/jdk/test/lib/cds/CDSOptions.java
+++ b/test/lib/jdk/test/lib/cds/CDSOptions.java
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -46,24 +46,43 @@ public class CDSOptions {
public CDSOptions addPrefix(String... prefix) {
- for (String s : prefix) this.prefix.add(s);
+ for (String s : prefix) {
+ this.prefix.add(s);
+ }
return this;
}
public CDSOptions addPrefix(String prefix[], String... extra) {
- for (String s : prefix) this.prefix.add(s);
- for (String s : extra) this.prefix.add(s);
+ for (String s : prefix) {
+ this.prefix.add(s);
+ }
+ for (String s : extra) {
+ this.prefix.add(s);
+ }
+ return this;
+ }
+
+ public CDSOptions addSuffix(ArrayList<String> suffix) {
+ for (String s : suffix) {
+ this.suffix.add(s);
+ }
return this;
}
public CDSOptions addSuffix(String... suffix) {
- for (String s : suffix) this.suffix.add(s);
+ for (String s : suffix) {
+ this.suffix.add(s);
+ }
return this;
}
public CDSOptions addSuffix(String suffix[], String... extra) {
- for (String s : suffix) this.suffix.add(s);
- for (String s : extra) this.suffix.add(s);
+ for (String s : suffix) {
+ this.suffix.add(s);
+ }
+ for (String s : extra) {
+ this.suffix.add(s);
+ }
return this;
}
--
2.37.0
此处可能存在不合适展示的内容，页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容，可点击提交进行申诉，我们将尽快为您处理。