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This commit is contained in:
Daniel D. Daugherty 2013-03-08 17:14:22 -08:00
commit f73c8f1408
17 changed files with 531 additions and 9 deletions
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4
hotspot/agent/src/os/linux/ps_core.c
View File

@ -132,12 +132,12 @@ static map_info* add_map_info(struct ps_prochandle* ph, int fd, off_t offset,
}
// Part of the class sharing workaround
static map_info* add_class_share_map_info(struct ps_prochandle* ph, off_t offset,
static void add_class_share_map_info(struct ps_prochandle* ph, off_t offset,
uintptr_t vaddr, size_t memsz) {
map_info* map;
if ((map = allocate_init_map(ph->core->classes_jsa_fd,
offset, vaddr, memsz)) == NULL) {
return NULL;
return;
}
map->next = ph->core->class_share_maps;

15
hotspot/src/os/bsd/vm/os_bsd.cpp
View File

@ -57,6 +57,7 @@
#include "runtime/threadCritical.hpp"
#include "runtime/timer.hpp"
#include "services/attachListener.hpp"
#include "services/memTracker.hpp"
#include "services/runtimeService.hpp"
#include "utilities/decoder.hpp"
#include "utilities/defaultStream.hpp"
@ -2275,13 +2276,25 @@ char* os::reserve_memory_special(size_t bytes, char* req_addr, bool exec) {
return NULL;
}
// The memory is committed
address pc = CALLER_PC;
MemTracker::record_virtual_memory_reserve((address)addr, bytes, pc);
MemTracker::record_virtual_memory_commit((address)addr, bytes, pc);
return addr;
}
bool os::release_memory_special(char* base, size_t bytes) {
// detaching the SHM segment will also delete it, see reserve_memory_special()
int rslt = shmdt(base);
return rslt == 0;
if (rslt == 0) {
MemTracker::record_virtual_memory_uncommit((address)base, bytes);
MemTracker::record_virtual_memory_release((address)base, bytes);
return true;
} else {
return false;
}
}
size_t os::large_page_size() {

5
hotspot/src/os/linux/vm/globals_linux.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2013, 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
@ -40,6 +40,9 @@
product(bool, UseHugeTLBFS, false, \
"Use MAP_HUGETLB for large pages") \
\
product(bool, LoadExecStackDllInVMThread, true, \
"Load DLLs with executable-stack attribute in the VM Thread") \
\
product(bool, UseSHM, false, \
"Use SYSV shared memory for large pages")

134
hotspot/src/os/linux/vm/os_linux.cpp
View File

@ -44,6 +44,7 @@
#include "runtime/extendedPC.hpp"
#include "runtime/globals.hpp"
#include "runtime/interfaceSupport.hpp"
#include "runtime/init.hpp"
#include "runtime/java.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/mutexLocker.hpp"
@ -57,10 +58,12 @@
#include "runtime/threadCritical.hpp"
#include "runtime/timer.hpp"
#include "services/attachListener.hpp"
#include "services/memTracker.hpp"
#include "services/runtimeService.hpp"
#include "utilities/decoder.hpp"
#include "utilities/defaultStream.hpp"
#include "utilities/events.hpp"
#include "utilities/elfFile.hpp"
#include "utilities/growableArray.hpp"
#include "utilities/vmError.hpp"
@ -1796,9 +1799,93 @@ bool os::dll_address_to_library_name(address addr, char* buf,
// in case of error it checks if .dll/.so was built for the
// same architecture as Hotspot is running on
// Remember the stack's state. The Linux dynamic linker will change
// the stack to 'executable' at most once, so we must safepoint only once.
bool os::Linux::_stack_is_executable = false;
// VM operation that loads a library. This is necessary if stack protection
// of the Java stacks can be lost during loading the library. If we
// do not stop the Java threads, they can stack overflow before the stacks
// are protected again.
class VM_LinuxDllLoad: public VM_Operation {
private:
const char *_filename;
void *_lib;
public:
VM_LinuxDllLoad(const char *fn) :
_filename(fn), _lib(NULL) {}
VMOp_Type type() const { return VMOp_LinuxDllLoad; }
void doit() {
_lib = os::Linux::dll_load_inner(_filename);
os::Linux::_stack_is_executable = true;
}
void* loaded_library() { return _lib; }
};
void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
{
void * result= ::dlopen(filename, RTLD_LAZY);
void * result = NULL;
bool load_attempted = false;
// Check whether the library to load might change execution rights
// of the stack. If they are changed, the protection of the stack
// guard pages will be lost. We need a safepoint to fix this.
//
// See Linux man page execstack(8) for more info.
if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) {
ElfFile ef(filename);
if (!ef.specifies_noexecstack()) {
if (!is_init_completed()) {
os::Linux::_stack_is_executable = true;
// This is OK - No Java threads have been created yet, and hence no
// stack guard pages to fix.
//
// This should happen only when you are building JDK7 using a very
// old version of JDK6 (e.g., with JPRT) and running test_gamma.
//
// Dynamic loader will make all stacks executable after
// this function returns, and will not do that again.
assert(Threads::first() == NULL, "no Java threads should exist yet.");
} else {
warning("You have loaded library %s which might have disabled stack guard. "
"The VM will try to fix the stack guard now.\n"
"It's highly recommended that you fix the library with "
"'execstack -c <libfile>', or link it with '-z noexecstack'.",
filename);
assert(Thread::current()->is_Java_thread(), "must be Java thread");
JavaThread *jt = JavaThread::current();
if (jt->thread_state() != _thread_in_native) {
// This happens when a compiler thread tries to load a hsdis-<arch>.so file
// that requires ExecStack. Cannot enter safe point. Let's give up.
warning("Unable to fix stack guard. Giving up.");
} else {
if (!LoadExecStackDllInVMThread) {
// This is for the case where the DLL has an static
// constructor function that executes JNI code. We cannot
// load such DLLs in the VMThread.
result = ::dlopen(filename, RTLD_LAZY);
}
ThreadInVMfromNative tiv(jt);
debug_only(VMNativeEntryWrapper vew;)
VM_LinuxDllLoad op(filename);
VMThread::execute(&op);
if (LoadExecStackDllInVMThread) {
result = op.loaded_library();
}
load_attempted = true;
}
}
}
}
if (!load_attempted) {
result = ::dlopen(filename, RTLD_LAZY);
}
if (result != NULL) {
// Successful loading
return result;
@ -1952,6 +2039,38 @@ void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
return NULL;
}
void * os::Linux::dll_load_inner(const char *filename) {
void * result = NULL;
if (LoadExecStackDllInVMThread) {
result = ::dlopen(filename, RTLD_LAZY);
}
// Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a
// library that requires an executable stack, or which does not have this
// stack attribute set, dlopen changes the stack attribute to executable. The
// read protection of the guard pages gets lost.
//
// Need to check _stack_is_executable again as multiple VM_LinuxDllLoad
// may have been queued at the same time.
if (!_stack_is_executable) {
JavaThread *jt = Threads::first();
while (jt) {
if (!jt->stack_guard_zone_unused() && // Stack not yet fully initialized
jt->stack_yellow_zone_enabled()) { // No pending stack overflow exceptions
if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(),
jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) {
warning("Attempt to reguard stack yellow zone failed.");
}
}
jt = jt->next();
}
}
return result;
}
/*
* glibc-2.0 libdl is not MT safe. If you are building with any glibc,
* chances are you might want to run the generated bits against glibc-2.0
@ -3094,13 +3213,24 @@ char* os::reserve_memory_special(size_t bytes, char* req_addr, bool exec) {
numa_make_global(addr, bytes);
}
// The memory is committed
address pc = CALLER_PC;
MemTracker::record_virtual_memory_reserve((address)addr, bytes, pc);
MemTracker::record_virtual_memory_commit((address)addr, bytes, pc);
return addr;
}
bool os::release_memory_special(char* base, size_t bytes) {
// detaching the SHM segment will also delete it, see reserve_memory_special()
int rslt = shmdt(base);
return rslt == 0;
if (rslt == 0) {
MemTracker::record_virtual_memory_uncommit((address)base, bytes);
MemTracker::record_virtual_memory_release((address)base, bytes);
return true;
} else {
return false;
}
}
size_t os::large_page_size() {

3
hotspot/src/os/linux/vm/os_linux.hpp
View File

@ -94,6 +94,9 @@ class Linux {
static void print_libversion_info(outputStream* st);
public:
static bool _stack_is_executable;
static void *dll_load_inner(const char *name);
static void init_thread_fpu_state();
static int get_fpu_control_word();
static void set_fpu_control_word(int fpu_control);

14
hotspot/src/os/solaris/vm/os_solaris.cpp
View File

@ -3420,13 +3420,25 @@ char* os::reserve_memory_special(size_t size, char* addr, bool exec) {
if ((retAddr != NULL) && UseNUMAInterleaving) {
numa_make_global(retAddr, size);
}
// The memory is committed
address pc = CALLER_PC;
MemTracker::record_virtual_memory_reserve((address)retAddr, size, pc);
MemTracker::record_virtual_memory_commit((address)retAddr, size, pc);
return retAddr;
}
bool os::release_memory_special(char* base, size_t bytes) {
// detaching the SHM segment will also delete it, see reserve_memory_special()
int rslt = shmdt(base);
return rslt == 0;
if (rslt == 0) {
MemTracker::record_virtual_memory_uncommit((address)base, bytes);
MemTracker::record_virtual_memory_release((address)base, bytes);
return true;
} else {
return false;
}
}
size_t os::large_page_size() {

26
hotspot/src/os/windows/vm/os_windows.cpp
View File

@ -60,6 +60,7 @@
#include "runtime/threadCritical.hpp"
#include "runtime/timer.hpp"
#include "services/attachListener.hpp"
#include "services/memTracker.hpp"
#include "services/runtimeService.hpp"
#include "utilities/decoder.hpp"
#include "utilities/defaultStream.hpp"
@ -2836,7 +2837,7 @@ static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags,
PAGE_READWRITE);
// If reservation failed, return NULL
if (p_buf == NULL) return NULL;
MemTracker::record_virtual_memory_reserve((address)p_buf, size_of_reserve, CALLER_PC);
os::release_memory(p_buf, bytes + chunk_size);
// we still need to round up to a page boundary (in case we are using large pages)
@ -2898,6 +2899,11 @@ static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags,
if (next_alloc_addr > p_buf) {
// Some memory was committed so release it.
size_t bytes_to_release = bytes - bytes_remaining;
// NMT has yet to record any individual blocks, so it
// need to create a dummy 'reserve' record to match
// the release.
MemTracker::record_virtual_memory_reserve((address)p_buf,
bytes_to_release, CALLER_PC);
os::release_memory(p_buf, bytes_to_release);
}
#ifdef ASSERT
@ -2909,10 +2915,19 @@ static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags,
#endif
return NULL;
}
bytes_remaining -= bytes_to_rq;
next_alloc_addr += bytes_to_rq;
count++;
}
// Although the memory is allocated individually, it is returned as one.
// NMT records it as one block.
address pc = CALLER_PC;
MemTracker::record_virtual_memory_reserve((address)p_buf, bytes, pc);
if ((flags & MEM_COMMIT) != 0) {
MemTracker::record_virtual_memory_commit((address)p_buf, bytes, pc);
}
// made it this far, success
return p_buf;
}
@ -3099,11 +3114,20 @@ char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
// normal policy just allocate it all at once
DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot);
if (res != NULL) {
address pc = CALLER_PC;
MemTracker::record_virtual_memory_reserve((address)res, bytes, pc);
MemTracker::record_virtual_memory_commit((address)res, bytes, pc);
}
return res;
}
}
bool os::release_memory_special(char* base, size_t bytes) {
assert(base != NULL, "Sanity check");
// Memory allocated via reserve_memory_special() is committed
MemTracker::record_virtual_memory_uncommit((address)base, bytes);
return release_memory(base, bytes);
}

5
hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp
View File

@ -410,6 +410,11 @@ inline static bool checkOverflow(sigcontext* uc,
// to handle_unexpected_exception way down below.
thread->disable_stack_red_zone();
tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
// This is a likely cause, but hard to verify. Let's just print
// it as a hint.
tty->print_raw_cr("Please check if any of your loaded .so files has "
"enabled executable stack (see man page execstack(8))");
} else {
// Accessing stack address below sp may cause SEGV if current
// thread has MAP_GROWSDOWN stack. This should only happen when

5
hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp
View File

@ -305,6 +305,11 @@ JVM_handle_linux_signal(int sig,
// to handle_unexpected_exception way down below.
thread->disable_stack_red_zone();
tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
// This is a likely cause, but hard to verify. Let's just print
// it as a hint.
tty->print_raw_cr("Please check if any of your loaded .so files has "
"enabled executable stack (see man page execstack(8))");
} else {
// Accessing stack address below sp may cause SEGV if current
// thread has MAP_GROWSDOWN stack. This should only happen when

7
hotspot/src/share/vm/runtime/thread.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2013, 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
@ -1289,6 +1289,7 @@ class JavaThread: public Thread {
void enable_stack_red_zone();
void disable_stack_red_zone();
inline bool stack_guard_zone_unused();
inline bool stack_yellow_zone_disabled();
inline bool stack_yellow_zone_enabled();
@ -1759,6 +1760,10 @@ inline CompilerThread* JavaThread::as_CompilerThread() {
return (CompilerThread*)this;
}
inline bool JavaThread::stack_guard_zone_unused() {
return _stack_guard_state == stack_guard_unused;
}
inline bool JavaThread::stack_yellow_zone_disabled() {
return _stack_guard_state == stack_guard_yellow_disabled;
}

1
hotspot/src/share/vm/runtime/vm_operations.hpp
View File

@ -94,6 +94,7 @@
template(ReportJavaOutOfMemory) \
template(JFRCheckpoint) \
template(Exit) \
template(LinuxDllLoad) \
class VM_Operation: public CHeapObj<mtInternal> {
public:

24
hotspot/src/share/vm/utilities/elfFile.cpp
View File

@ -197,4 +197,28 @@ ElfStringTable* ElfFile::get_string_table(int index) {
return NULL;
}
#ifdef LINUX
bool ElfFile::specifies_noexecstack() {
Elf_Phdr phdr;
if (!m_file) return true;
if (!fseek(m_file, m_elfHdr.e_phoff, SEEK_SET)) {
for (int index = 0; index < m_elfHdr.e_phnum; index ++) {
if (fread((void*)&phdr, sizeof(Elf_Phdr), 1, m_file) != 1) {
m_status = NullDecoder::file_invalid;
return false;
}
if (phdr.p_type == PT_GNU_STACK) {
if (phdr.p_flags == (PF_R | PF_W)) {
return true;
} else {
return false;
}
}
}
}
return false;
}
#endif
#endif // _WINDOWS

10
hotspot/src/share/vm/utilities/elfFile.hpp
View File

@ -43,6 +43,7 @@ typedef Elf64_Addr Elf_Addr;
typedef Elf64_Ehdr Elf_Ehdr;
typedef Elf64_Shdr Elf_Shdr;
typedef Elf64_Phdr Elf_Phdr;
typedef Elf64_Sym Elf_Sym;
#if !defined(_ALLBSD_SOURCE) || defined(__APPLE__)
@ -59,6 +60,7 @@ typedef Elf32_Addr Elf_Addr;
typedef Elf32_Ehdr Elf_Ehdr;
typedef Elf32_Shdr Elf_Shdr;
typedef Elf32_Phdr Elf_Phdr;
typedef Elf32_Sym Elf_Sym;
#if !defined(_ALLBSD_SOURCE) || defined(__APPLE__)
@ -123,6 +125,14 @@ protected:
ElfFile* next() const { return m_next; }
void set_next(ElfFile* file) { m_next = file; }
public:
// Returns true if the elf file is marked NOT to require an executable stack,
// or if the file could not be opened.
// Returns false if the elf file requires an executable stack, the stack flag
// is not set at all, or if the file can not be read.
// On systems other than linux it always returns false.
bool specifies_noexecstack() NOT_LINUX({ return false; });
protected:
ElfFile* m_next;

65
hotspot/test/runtime/7107135/Test.java Normal file
View File

@ -0,0 +1,65 @@
/*
* Copyright (c) 2002-2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 SAP AG. 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
class Test {
static boolean loadLib(String libName){
try {
System.loadLibrary(libName);
System.out.println("Loaded library "+ libName + ".");
return true;
} catch (SecurityException e) {
System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n");
} catch (UnsatisfiedLinkError e) {
System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n");
}
return false;
}
public static int counter = 1;
static int Runner() {
counter = counter * -1;
int i = counter;
if(counter < 2) counter += Runner();
return i;
}
public static int run() {
try{
Runner();
} catch (StackOverflowError e) {
System.out.println("Caught stack overflow error.");
return 0;
} catch (OutOfMemoryError e) {
return 0;
}
return 2;
}
public static void main(String argv[]) {
loadLib(argv[0]);
System.exit(run());
}
}

98
hotspot/test/runtime/7107135/Test7107135.sh Normal file
View File

@ -0,0 +1,98 @@
#!/bin/sh
#
# Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
# Copyright (c) 2011 SAP AG. 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
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#
##
## @test Test7107135.sh
## @bug 7107135
## @summary Stack guard pages lost after loading library with executable stack.
## @run shell Test7107135.sh
##
if [ "${TESTSRC}" = "" ]
then TESTSRC=.
fi
if [ "${TESTJAVA}" = "" ]
then
PARENT=`dirname \`which java\``
TESTJAVA=`dirname ${PARENT}`
echo "TESTJAVA not set, selecting " ${TESTJAVA}
echo "If this is incorrect, try setting the variable manually."
fi
BIT_FLAG=""
# set platform-dependent variables
OS=`uname -s`
case "$OS" in
Linux)
NULL=/dev/null
PS=":"
FS="/"
;;
*)
NULL=NUL
PS=";"
FS="\\"
echo "Test passed; only valid for Linux"
exit 0;
;;
esac
ARCH=`uname -m`
THIS_DIR=`pwd`
cp ${TESTSRC}${FS}*.java ${THIS_DIR}
${TESTJAVA}${FS}bin${FS}javac *.java
gcc -fPIC -shared -c -o test.o -I${TESTJAVA}${FS}include -I${TESTJAVA}${FS}include${FS}linux ${TESTSRC}${FS}test.c
ld -shared -z execstack -o libtest-rwx.so test.o
ld -shared -z noexecstack -o libtest-rw.so test.o
LD_LIBRARY_PATH=${THIS_DIR}
echo LD_LIBRARY_PATH = ${LD_LIBRARY_PATH}
export LD_LIBRARY_PATH
# This should not fail.
echo Check testprogram. Expected to pass:
echo ${TESTJAVA}${FS}bin${FS}java -cp ${THIS_DIR} Test test-rw
${TESTJAVA}${FS}bin${FS}java -cp ${THIS_DIR} Test test-rw
echo
echo Test changing of stack protection:
echo ${TESTJAVA}${FS}bin${FS}java -cp ${THIS_DIR} Test test-rw
${TESTJAVA}${FS}bin${FS}java -cp ${THIS_DIR} Test test-rwx
if [ "$?" == "0" ]
then
echo
echo ${TESTJAVA}${FS}bin${FS}java -cp ${THIS_DIR} TestMT test-rwx
${TESTJAVA}${FS}bin${FS}java -cp ${THIS_DIR} TestMT test-rwx
fi
exit $?

85
hotspot/test/runtime/7107135/TestMT.java Normal file
View File

@ -0,0 +1,85 @@
/*
* Copyright (c) 2002-2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 SAP AG. 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
class TestMT {
static boolean loadLib(String libName) {
try {
System.loadLibrary(libName);
System.out.println("Loaded library "+ libName + ".");
return true;
} catch (SecurityException e) {
System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n");
} catch (UnsatisfiedLinkError e) {
System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n");
}
return false;
}
public static int counter = 1;
static int Runner() {
counter = counter * -1;
int i = counter;
if (counter < 2) counter += Runner();
return i;
}
public static int run(String msg) {
try {
Runner();
} catch (StackOverflowError e) {
System.out.println(msg + " caught stack overflow error.");
return 0;
} catch (OutOfMemoryError e) {
return 0;
}
return 2;
}
public static void main(String argv[]) {
try {
for (int i = 0; i < 20; i++) {
Thread t = new DoStackOverflow("SpawnedThread " + i);
t.start();
}
run("Main thread");
loadLib("test-rwx");
run("Main thread");
} catch (Exception e) {
System.out.println(e);
}
}
static class DoStackOverflow extends Thread {
public DoStackOverflow(String name) {
super(name);
}
public void run() {
for (int i = 0; i < 10; ++i) {
TestMT.run(getName());
yield();
}
}
}
}

39
hotspot/test/runtime/7107135/test.c Normal file
View File

@ -0,0 +1,39 @@
/*
* Copyright (c) 2002-2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 SAP AG. 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "jni.h"
#ifdef __cplusplus
extern "C" {
#endif
JNIEXPORT jint JNICALL Java_Test_someMethod(JNIEnv *env, jobject mainObject) {
return 3;
}
#ifdef __cplusplus
}
#endif