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8227275: Within native OOM error handling, assertions may hang the process

Browse source 
Reviewed-by: mdoerr, coleenp
This commit is contained in:
Thomas Stuefe 2019-07-11 06:56:51 +02:00
parent 4b5b4f479c
commit ac0e72332e
10 changed files with 40 additions and 15 deletions
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3
src/hotspot/os/posix/vmError_posix.cpp
View file

@ -132,9 +132,10 @@ static void crash_handler(int sig, siginfo_t* info, void* ucVoid) {
// Needed because asserts may happen in error handling too.
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) {
handle_assert_poison_fault(ucVoid, info->si_addr);
if (handle_assert_poison_fault(ucVoid, info->si_addr)) {
return;
}
}
#endif // CAN_SHOW_REGISTERS_ON_ASSERT
VMError::report_and_die(NULL, sig, pc, info, ucVoid);

3
src/hotspot/os_cpu/linux_aarch64/os_linux_aarch64.cpp
View file

@ -279,9 +279,10 @@ JVM_handle_linux_signal(int sig,
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) {
handle_assert_poison_fault(ucVoid, info->si_addr);
if (handle_assert_poison_fault(ucVoid, info->si_addr)) {
return 1;
}
}
#endif
JavaThread* thread = NULL;

3
src/hotspot/os_cpu/linux_arm/os_linux_arm.cpp
View file

@ -301,9 +301,10 @@ extern "C" int JVM_handle_linux_signal(int sig, siginfo_t* info,
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) {
handle_assert_poison_fault(ucVoid, info->si_addr);
if (handle_assert_poison_fault(ucVoid, info->si_addr)) {
return 1;
}
}
#endif
JavaThread* thread = NULL;

3
src/hotspot/os_cpu/linux_ppc/os_linux_ppc.cpp
View file

@ -271,9 +271,10 @@ JVM_handle_linux_signal(int sig,
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) {
handle_assert_poison_fault(ucVoid, info->si_addr);
if (handle_assert_poison_fault(ucVoid, info->si_addr)) {
return 1;
}
}
#endif
JavaThread* thread = NULL;

3
src/hotspot/os_cpu/linux_s390/os_linux_s390.cpp
View file

@ -270,9 +270,10 @@ JVM_handle_linux_signal(int sig,
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) {
handle_assert_poison_fault(ucVoid, info->si_addr);
if (handle_assert_poison_fault(ucVoid, info->si_addr)) {
return 1;
}
}
#endif
JavaThread* thread = NULL;

3
src/hotspot/os_cpu/linux_sparc/os_linux_sparc.cpp
View file

@ -514,9 +514,10 @@ JVM_handle_linux_signal(int sig,
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) {
handle_assert_poison_fault(ucVoid, info->si_addr);
if (handle_assert_poison_fault(ucVoid, info->si_addr)) {
return 1;
}
}
#endif
JavaThread* thread = NULL;

3
src/hotspot/os_cpu/linux_x86/os_linux_x86.cpp
View file

@ -303,9 +303,10 @@ JVM_handle_linux_signal(int sig,
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) {
handle_assert_poison_fault(ucVoid, info->si_addr);
if (handle_assert_poison_fault(ucVoid, info->si_addr)) {
return 1;
}
}
#endif
JavaThread* thread = NULL;

13
src/hotspot/share/utilities/debug.cpp
View file

@ -734,6 +734,10 @@ void initialize_assert_poison() {
}
}
void disarm_assert_poison() {
g_assert_poison = &g_dummy;
}
static void store_context(const void* context) {
memcpy(&g_stored_assertion_context, context, sizeof(ucontext_t));
#if defined(__linux) && defined(PPC64)
@ -746,7 +750,14 @@ static void store_context(const void* context) {
bool handle_assert_poison_fault(const void* ucVoid, const void* faulting_address) {
if (faulting_address == g_assert_poison) {
// Disarm poison page.
os::protect_memory((char*)g_assert_poison, os::vm_page_size(), os::MEM_PROT_RWX);
if (os::protect_memory((char*)g_assert_poison, os::vm_page_size(), os::MEM_PROT_RWX) == false) {
#ifdef ASSERT
fprintf(stderr, "Assertion poison page cannot be unprotected - mprotect failed with %d (%s)",
errno, os::strerror(errno));
fflush(stderr);
#endif
return false; // unprotecting memory may fail in OOM situations, as surprising as this sounds.
}
// Store Context away.
if (ucVoid) {
const intx my_tid = os::current_thread_id();

1
src/hotspot/share/utilities/debug.hpp
View file

@ -37,6 +37,7 @@
extern char* g_assert_poison;
#define TOUCH_ASSERT_POISON (*g_assert_poison) = 'X';
void initialize_assert_poison();
void disarm_assert_poison();
bool handle_assert_poison_fault(const void* ucVoid, const void* faulting_address);
#else
#define TOUCH_ASSERT_POISON

6
src/hotspot/share/utilities/vmError.cpp
View file

@ -1327,6 +1327,12 @@ void VMError::report_and_die(int id, const char* message, const char* detail_fmt
// File descriptor to the error log file.
static int fd_log = -1;
#ifdef CAN_SHOW_REGISTERS_ON_ASSERT
// Disarm assertion poison page, since from this point on we do not need this mechanism anymore and it may
// cause problems in error handling during native OOM, see JDK-8227275.
disarm_assert_poison();
#endif
// Use local fdStream objects only. Do not use global instances whose initialization
// relies on dynamic initialization (see JDK-8214975). Do not rely on these instances
// to carry over into recursions or invocations from other threads.