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[Qemu-devel] [PATCH RFC v4 7/7] qemu_thread_create: propagate the error
|
From: |
Fei Li |
|
Subject: |
[Qemu-devel] [PATCH RFC v4 7/7] qemu_thread_create: propagate the error to callers to handle |
|
Date: |
Wed, 26 Sep 2018 18:02:46 +0800 |
Make qemu_thread_create() return a Boolean to indicate if it succeeds
rather than failing with an error. And add an Error parameter to hold
the error message and let the callers handle it.
Signed-off-by: Fei Li <address@hidden>
---
cpus.c | 45 +++++++++++++++++++++++++++--------------
dump.c | 6 ++++--
hw/misc/edu.c | 6 ++++--
hw/ppc/spapr_hcall.c | 10 +++++++--
hw/rdma/rdma_backend.c | 4 +++-
hw/usb/ccid-card-emulated.c | 13 ++++++++----
include/qemu/thread.h | 4 ++--
io/task.c | 3 ++-
iothread.c | 18 ++++++++++++-----
migration/migration.c | 49 +++++++++++++++++++++++++++++++--------------
migration/postcopy-ram.c | 14 +++++++++++--
migration/ram.c | 39 +++++++++++++++++++++++++++---------
migration/savevm.c | 11 +++++++---
tests/atomic_add-bench.c | 3 ++-
tests/iothread.c | 2 +-
tests/qht-bench.c | 3 ++-
tests/rcutorture.c | 3 ++-
tests/test-aio.c | 2 +-
tests/test-rcu-list.c | 3 ++-
ui/vnc-jobs.c | 8 ++++++--
util/compatfd.c | 9 +++++++--
util/oslib-posix.c | 17 ++++++++++++----
util/qemu-thread-posix.c | 24 ++++++++++++++--------
util/qemu-thread-win32.c | 16 +++++++++++----
util/rcu.c | 3 ++-
util/thread-pool.c | 4 +++-
26 files changed, 227 insertions(+), 92 deletions(-)
diff --git a/cpus.c b/cpus.c
index cb478039b6..d9ba3f5532 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1928,15 +1928,20 @@ static void qemu_tcg_init_vcpu(CPUState *cpu, Error
**errp)
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/TCG",
cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name,
qemu_tcg_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(cpu->thread, thread_name,
+ qemu_tcg_cpu_thread_fn, cpu,
+ QEMU_THREAD_JOINABLE, errp)) {
+ return;
+ }
} else {
/* share a single thread for all cpus with TCG */
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "ALL CPUs/TCG");
- qemu_thread_create(cpu->thread, thread_name,
- qemu_tcg_rr_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(cpu->thread, thread_name,
+ qemu_tcg_rr_cpu_thread_fn, cpu,
+ QEMU_THREAD_JOINABLE, errp)) {
+ return;
+ }
single_tcg_halt_cond = cpu->halt_cond;
single_tcg_cpu_thread = cpu->thread;
@@ -1964,8 +1969,10 @@ static void qemu_hax_start_vcpu(CPUState *cpu, Error
**errp)
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HAX",
cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_hax_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(cpu->thread, thread_name, qemu_hax_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE, errp)) {
+ return;
+ }
#ifdef _WIN32
cpu->hThread = qemu_thread_get_handle(cpu->thread);
#endif
@@ -1980,8 +1987,10 @@ static void qemu_kvm_start_vcpu(CPUState *cpu, Error
**errp)
qemu_cond_init(cpu->halt_cond);
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM",
cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_kvm_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(cpu->thread, thread_name, qemu_kvm_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE, errp)) {
+ /* keep 'if' here in case there is further error handling logic */
+ }
}
static void qemu_hvf_start_vcpu(CPUState *cpu, Error **errp)
@@ -1998,8 +2007,10 @@ static void qemu_hvf_start_vcpu(CPUState *cpu, Error
**errp)
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HVF",
cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_hvf_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(cpu->thread, thread_name, qemu_hvf_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE, errp)) {
+ /* keep 'if' here in case there is further error handling logic */
+ }
}
static void qemu_whpx_start_vcpu(CPUState *cpu, Error **errp)
@@ -2011,8 +2022,10 @@ static void qemu_whpx_start_vcpu(CPUState *cpu, Error
**errp)
qemu_cond_init(cpu->halt_cond);
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX",
cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_whpx_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(cpu->thread, thread_name, qemu_whpx_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE, errp)) {
+ return;
+ }
#ifdef _WIN32
cpu->hThread = qemu_thread_get_handle(cpu->thread);
#endif
@@ -2027,8 +2040,10 @@ static void qemu_dummy_start_vcpu(CPUState *cpu, Error
**errp)
qemu_cond_init(cpu->halt_cond);
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/DUMMY",
cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_dummy_cpu_thread_fn, cpu,
- QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(cpu->thread, thread_name, qemu_dummy_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE, errp)) {
+ /* keep 'if' here in case there is further error handling logic */
+ }
}
bool qemu_init_vcpu(CPUState *cpu, Error **errp)
diff --git a/dump.c b/dump.c
index 4ec94c5e25..1f003aff9a 100644
--- a/dump.c
+++ b/dump.c
@@ -2020,8 +2020,10 @@ void qmp_dump_guest_memory(bool paging, const char *file,
if (detach_p) {
/* detached dump */
s->detached = true;
- qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread,
- s, QEMU_THREAD_DETACHED);
+ if (!qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread,
+ s, QEMU_THREAD_DETACHED, errp)) {
+ /* keep 'if' here in case there is further error handling logic */
+ }
} else {
/* sync dump */
dump_process(s, errp);
diff --git a/hw/misc/edu.c b/hw/misc/edu.c
index df26a4d046..2810192b1f 100644
--- a/hw/misc/edu.c
+++ b/hw/misc/edu.c
@@ -354,8 +354,10 @@ static void pci_edu_realize(PCIDevice *pdev, Error **errp)
qemu_mutex_init(&edu->thr_mutex);
qemu_cond_init(&edu->thr_cond);
- qemu_thread_create(&edu->thread, "edu", edu_fact_thread,
- edu, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&edu->thread, "edu", edu_fact_thread,
+ edu, QEMU_THREAD_JOINABLE, errp)) {
+ return;
+ }
memory_region_init_io(&edu->mmio, OBJECT(edu), &edu_mmio_ops, edu,
"edu-mmio", 1 * MiB);
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index ae913d070f..7c16ade04a 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -478,6 +478,7 @@ static target_ulong h_resize_hpt_prepare(PowerPCCPU *cpu,
sPAPRPendingHPT *pending = spapr->pending_hpt;
uint64_t current_ram_size;
int rc;
+ Error *local_err = NULL;
if (spapr->resize_hpt == SPAPR_RESIZE_HPT_DISABLED) {
return H_AUTHORITY;
@@ -538,8 +539,13 @@ static target_ulong h_resize_hpt_prepare(PowerPCCPU *cpu,
pending->shift = shift;
pending->ret = H_HARDWARE;
- qemu_thread_create(&pending->thread, "sPAPR HPT prepare",
- hpt_prepare_thread, pending, QEMU_THREAD_DETACHED);
+ if (!qemu_thread_create(&pending->thread, "sPAPR HPT prepare",
+ hpt_prepare_thread, pending,
+ QEMU_THREAD_DETACHED, &local_err)) {
+ error_reportf_err(local_err, "failed to create hpt_prepare_thread: ");
+ g_free(pending);
+ return H_RESOURCE;
+ }
spapr->pending_hpt = pending;
diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c
index d7a4bbd91f..53a2bd0d85 100644
--- a/hw/rdma/rdma_backend.c
+++ b/hw/rdma/rdma_backend.c
@@ -164,8 +164,10 @@ static void start_comp_thread(RdmaBackendDev *backend_dev)
snprintf(thread_name, sizeof(thread_name), "rdma_comp_%s",
ibv_get_device_name(backend_dev->ib_dev));
backend_dev->comp_thread.run = true;
+ /* FIXME: let the further caller handle the error instead of abort() here
*/
qemu_thread_create(&backend_dev->comp_thread.thread, thread_name,
- comp_handler_thread, backend_dev, QEMU_THREAD_DETACHED);
+ comp_handler_thread, backend_dev,
+ QEMU_THREAD_DETACHED, &error_abort);
}
void rdma_backend_register_comp_handler(void (*handler)(int status,
diff --git a/hw/usb/ccid-card-emulated.c b/hw/usb/ccid-card-emulated.c
index 5c8b3c9907..09682b5d30 100644
--- a/hw/usb/ccid-card-emulated.c
+++ b/hw/usb/ccid-card-emulated.c
@@ -538,10 +538,15 @@ static void emulated_realize(CCIDCardState *base, Error
**errp)
error_setg(errp, "%s: failed to initialize vcard", TYPE_EMULATED_CCID);
return;
}
- qemu_thread_create(&card->event_thread_id, "ccid/event", event_thread,
- card, QEMU_THREAD_JOINABLE);
- qemu_thread_create(&card->apdu_thread_id, "ccid/apdu", handle_apdu_thread,
- card, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&card->event_thread_id, "ccid/event", event_thread,
+ card, QEMU_THREAD_JOINABLE, errp)) {
+ return;
+ }
+ if (!qemu_thread_create(&card->apdu_thread_id, "ccid/apdu",
+ handle_apdu_thread, card,
+ QEMU_THREAD_JOINABLE, errp)) {
+ /* keep 'if' here in case there is further error handling logic */
+ }
}
static void emulated_unrealize(CCIDCardState *base, Error **errp)
diff --git a/include/qemu/thread.h b/include/qemu/thread.h
index dacebcfff0..1fb84a07d2 100644
--- a/include/qemu/thread.h
+++ b/include/qemu/thread.h
@@ -135,9 +135,9 @@ void qemu_event_reset(QemuEvent *ev);
void qemu_event_wait(QemuEvent *ev);
void qemu_event_destroy(QemuEvent *ev);
-void qemu_thread_create(QemuThread *thread, const char *name,
+bool qemu_thread_create(QemuThread *thread, const char *name,
void *(*start_routine)(void *),
- void *arg, int mode);
+ void *arg, int mode, Error **errp);
void *qemu_thread_join(QemuThread *thread);
void qemu_thread_get_self(QemuThread *thread);
bool qemu_thread_is_self(QemuThread *thread);
diff --git a/io/task.c b/io/task.c
index 2886a2c1bc..6d3a18ab80 100644
--- a/io/task.c
+++ b/io/task.c
@@ -149,7 +149,8 @@ void qio_task_run_in_thread(QIOTask *task,
"io-task-worker",
qio_task_thread_worker,
data,
- QEMU_THREAD_DETACHED);
+ QEMU_THREAD_DETACHED,
+ &error_abort);
}
diff --git a/iothread.c b/iothread.c
index aff1281257..cdc6fadce4 100644
--- a/iothread.c
+++ b/iothread.c
@@ -161,9 +161,7 @@ static void iothread_complete(UserCreatable *obj, Error
**errp)
&local_error);
if (local_error) {
error_propagate(errp, local_error);
- aio_context_unref(iothread->ctx);
- iothread->ctx = NULL;
- return;
+ goto fail;
}
qemu_mutex_init(&iothread->init_done_lock);
@@ -175,8 +173,14 @@ static void iothread_complete(UserCreatable *obj, Error
**errp)
*/
name = object_get_canonical_path_component(OBJECT(obj));
thread_name = g_strdup_printf("IO %s", name);
- qemu_thread_create(&iothread->thread, thread_name, iothread_run,
- iothread, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&iothread->thread, thread_name, iothread_run,
+ iothread, QEMU_THREAD_JOINABLE, errp)) {
+ g_free(thread_name);
+ g_free(name);
+ qemu_cond_destroy(&iothread->init_done_cond);
+ qemu_mutex_destroy(&iothread->init_done_lock);
+ goto fail;
+ }
g_free(thread_name);
g_free(name);
@@ -187,6 +191,10 @@ static void iothread_complete(UserCreatable *obj, Error
**errp)
&iothread->init_done_lock);
}
qemu_mutex_unlock(&iothread->init_done_lock);
+ return;
+fail:
+ aio_context_unref(iothread->ctx);
+ iothread->ctx = NULL;
}
typedef struct {
diff --git a/migration/migration.c b/migration/migration.c
index 0dbaf3ff80..623e8fafae 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -388,6 +388,7 @@ static void process_incoming_migration_co(void *opaque)
MigrationIncomingState *mis = migration_incoming_get_current();
PostcopyState ps;
int ret;
+ Error *local_err = NULL;
assert(mis->from_src_file);
mis->migration_incoming_co = qemu_coroutine_self();
@@ -420,8 +421,13 @@ static void process_incoming_migration_co(void *opaque)
/* we get COLO info, and know if we are in COLO mode */
if (!ret && migration_incoming_enable_colo()) {
- qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming",
- colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming",
+ colo_process_incoming_thread, mis,
+ QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err, "failed to create "
+ "colo_process_incoming_thread: ");
+ goto fail;
+ }
mis->have_colo_incoming_thread = true;
qemu_coroutine_yield();
@@ -430,20 +436,22 @@ static void process_incoming_migration_co(void *opaque)
}
if (ret < 0) {
- Error *local_err = NULL;
-
- migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE,
- MIGRATION_STATUS_FAILED);
error_report("load of migration failed: %s", strerror(-ret));
- qemu_fclose(mis->from_src_file);
- if (multifd_load_cleanup(&local_err) != 0) {
- error_report_err(local_err);
- }
- exit(EXIT_FAILURE);
+ goto fail;
}
mis->bh = qemu_bh_new(process_incoming_migration_bh, mis);
qemu_bh_schedule(mis->bh);
mis->migration_incoming_co = NULL;
+ return;
+fail:
+ local_err = NULL;
+ migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE,
+ MIGRATION_STATUS_FAILED);
+ qemu_fclose(mis->from_src_file);
+ if (multifd_load_cleanup(&local_err) != 0) {
+ error_report_err(local_err);
+ }
+ exit(EXIT_FAILURE);
}
static void migration_incoming_setup(QEMUFile *f)
@@ -2285,6 +2293,7 @@ out:
static int open_return_path_on_source(MigrationState *ms,
bool create_thread)
{
+ Error *local_err = NULL;
ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file);
if (!ms->rp_state.from_dst_file) {
@@ -2298,8 +2307,13 @@ static int open_return_path_on_source(MigrationState *ms,
return 0;
}
- qemu_thread_create(&ms->rp_state.rp_thread, "return path",
- source_return_path_thread, ms, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&ms->rp_state.rp_thread, "return path",
+ source_return_path_thread, ms,
+ QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err,
+ "failed to create source_return_path_thread: ");
+ return -1;
+ }
trace_open_return_path_on_source_continue();
@@ -3124,8 +3138,13 @@ void migrate_fd_connect(MigrationState *s, Error
*error_in)
migrate_fd_cleanup(s);
return;
}
- qemu_thread_create(&s->thread, "live_migration", migration_thread, s,
- QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&s->thread, "live_migration", migration_thread,
+ s, QEMU_THREAD_JOINABLE, &error_in)) {
+ error_reportf_err(error_in, "failed to create migration_thread: ");
+ migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED);
+ migrate_fd_cleanup(s);
+ return;
+ }
s->migration_thread_running = true;
}
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index f96e0ae1f8..c6d2ca0df9 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -1082,6 +1082,8 @@ retry:
int postcopy_ram_enable_notify(MigrationIncomingState *mis)
{
+ Error *local_err = NULL;
+
/* Open the fd for the kernel to give us userfaults */
mis->userfault_fd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
if (mis->userfault_fd == -1) {
@@ -1108,8 +1110,16 @@ int postcopy_ram_enable_notify(MigrationIncomingState
*mis)
}
qemu_sem_init(&mis->fault_thread_sem, 0);
- qemu_thread_create(&mis->fault_thread, "postcopy/fault",
- postcopy_ram_fault_thread, mis, QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&mis->fault_thread, "postcopy/fault",
+ postcopy_ram_fault_thread, mis,
+ QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err,
+ "failed to create postcopy_ram_fault_thread: ");
+ close(mis->userfault_event_fd);
+ close(mis->userfault_fd);
+ qemu_sem_destroy(&mis->fault_thread_sem);
+ return -1;
+ }
qemu_sem_wait(&mis->fault_thread_sem);
qemu_sem_destroy(&mis->fault_thread_sem);
mis->have_fault_thread = true;
diff --git a/migration/ram.c b/migration/ram.c
index 433f35664a..a9b2de7898 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -470,6 +470,7 @@ static void compress_threads_save_cleanup(void)
static int compress_threads_save_setup(void)
{
int i, thread_count;
+ Error *local_err = NULL;
if (!migrate_use_compression()) {
return 0;
@@ -499,9 +500,12 @@ static int compress_threads_save_setup(void)
comp_param[i].quit = false;
qemu_mutex_init(&comp_param[i].mutex);
qemu_cond_init(&comp_param[i].cond);
- qemu_thread_create(compress_threads + i, "compress",
- do_data_compress, comp_param + i,
- QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(compress_threads + i, "compress",
+ do_data_compress, comp_param + i,
+ QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err, "failed to create do_data_compress:
");
+ goto exit;
+ }
}
return 0;
@@ -1079,8 +1083,14 @@ static void multifd_new_send_channel_async(QIOTask
*task, gpointer opaque)
p->c = QIO_CHANNEL(sioc);
qio_channel_set_delay(p->c, false);
p->running = true;
- qemu_thread_create(&p->thread, p->name, multifd_send_thread, p,
- QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&p->thread, p->name, multifd_send_thread, p,
+ QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err,
+ "failed to create multifd_send_thread: ");
+ multifd_save_cleanup();
+ migrate_set_error(migrate_get_current(), local_err);
+ return;
+ }
atomic_inc(&multifd_send_state->count);
}
@@ -1354,8 +1364,12 @@ bool multifd_recv_new_channel(QIOChannel *ioc)
p->num_packets = 1;
p->running = true;
- qemu_thread_create(&p->thread, p->name, multifd_recv_thread, p,
- QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&p->thread, p->name, multifd_recv_thread,
+ p, QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err, "failed to create multifd_recv_thread: ");
+ multifd_recv_terminate_threads(local_err, true);
+ return false;
+ }
atomic_inc(&multifd_recv_state->count);
return multifd_recv_state->count == migrate_multifd_channels();
}
@@ -3551,6 +3565,7 @@ static void compress_threads_load_cleanup(void)
static int compress_threads_load_setup(QEMUFile *f)
{
int i, thread_count;
+ Error *local_err = NULL;
if (!migrate_use_compression()) {
return 0;
@@ -3572,9 +3587,13 @@ static int compress_threads_load_setup(QEMUFile *f)
qemu_cond_init(&decomp_param[i].cond);
decomp_param[i].done = true;
decomp_param[i].quit = false;
- qemu_thread_create(decompress_threads + i, "decompress",
- do_data_decompress, decomp_param + i,
- QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(decompress_threads + i, "decompress",
+ do_data_decompress, decomp_param + i,
+ QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err,
+ "failed to create do_data_decompress: ");
+ goto exit;
+ }
}
return 0;
exit:
diff --git a/migration/savevm.c b/migration/savevm.c
index 13e51f0e34..fc26a10e68 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1727,9 +1727,14 @@ static int
loadvm_postcopy_handle_listen(MigrationIncomingState *mis)
mis->have_listen_thread = true;
/* Start up the listening thread and wait for it to signal ready */
qemu_sem_init(&mis->listen_thread_sem, 0);
- qemu_thread_create(&mis->listen_thread, "postcopy/listen",
- postcopy_ram_listen_thread, NULL,
- QEMU_THREAD_DETACHED);
+ if (!qemu_thread_create(&mis->listen_thread, "postcopy/listen",
+ postcopy_ram_listen_thread, NULL,
+ QEMU_THREAD_DETACHED, &local_err)) {
+ error_reportf_err(local_err,
+ "failed to create postcopy_ram_listen_thread: ");
+ qemu_sem_destroy(&mis->listen_thread_sem);
+ return -1;
+ }
qemu_sem_wait(&mis->listen_thread_sem);
qemu_sem_destroy(&mis->listen_thread_sem);
diff --git a/tests/atomic_add-bench.c b/tests/atomic_add-bench.c
index 2f6c72f63a..338b9563e3 100644
--- a/tests/atomic_add-bench.c
+++ b/tests/atomic_add-bench.c
@@ -2,6 +2,7 @@
#include "qemu/thread.h"
#include "qemu/host-utils.h"
#include "qemu/processor.h"
+#include "qapi/error.h"
struct thread_info {
uint64_t r;
@@ -110,7 +111,7 @@ static void create_threads(void)
info->r = (i + 1) ^ time(NULL);
qemu_thread_create(&threads[i], NULL, thread_func, info,
- QEMU_THREAD_JOINABLE);
+ QEMU_THREAD_JOINABLE, &error_abort);
}
}
diff --git a/tests/iothread.c b/tests/iothread.c
index 777d9eea46..f4ad992e61 100644
--- a/tests/iothread.c
+++ b/tests/iothread.c
@@ -73,7 +73,7 @@ IOThread *iothread_new(void)
qemu_mutex_init(&iothread->init_done_lock);
qemu_cond_init(&iothread->init_done_cond);
qemu_thread_create(&iothread->thread, NULL, iothread_run,
- iothread, QEMU_THREAD_JOINABLE);
+ iothread, QEMU_THREAD_JOINABLE, &error_abort);
/* Wait for initialization to complete */
qemu_mutex_lock(&iothread->init_done_lock);
diff --git a/tests/qht-bench.c b/tests/qht-bench.c
index f492b3a20a..20a4101a17 100644
--- a/tests/qht-bench.c
+++ b/tests/qht-bench.c
@@ -9,6 +9,7 @@
#include "qemu/atomic.h"
#include "qemu/qht.h"
#include "qemu/rcu.h"
+#include "qapi/error.h"
#include "exec/tb-hash-xx.h"
struct thread_stats {
@@ -239,7 +240,7 @@ th_create_n(QemuThread **threads, struct thread_info
**infos, const char *name,
prepare_thread_info(&info[i], offset + i);
info[i].func = func;
qemu_thread_create(&th[i], name, thread_func, &info[i],
- QEMU_THREAD_JOINABLE);
+ QEMU_THREAD_JOINABLE, &error_abort);
}
}
diff --git a/tests/rcutorture.c b/tests/rcutorture.c
index 49311c82ea..0e799ff256 100644
--- a/tests/rcutorture.c
+++ b/tests/rcutorture.c
@@ -64,6 +64,7 @@
#include "qemu/atomic.h"
#include "qemu/rcu.h"
#include "qemu/thread.h"
+#include "qapi/error.h"
long long n_reads = 0LL;
long n_updates = 0L;
@@ -90,7 +91,7 @@ static void create_thread(void *(*func)(void *))
exit(-1);
}
qemu_thread_create(&threads[n_threads], "test", func, &data[n_threads],
- QEMU_THREAD_JOINABLE);
+ QEMU_THREAD_JOINABLE, &error_abort);
n_threads++;
}
diff --git a/tests/test-aio.c b/tests/test-aio.c
index 86fb73b3d5..b3ac261724 100644
--- a/tests/test-aio.c
+++ b/tests/test-aio.c
@@ -154,7 +154,7 @@ static void test_acquire(void)
qemu_thread_create(&thread, "test_acquire_thread",
test_acquire_thread,
- &data, QEMU_THREAD_JOINABLE);
+ &data, QEMU_THREAD_JOINABLE, &error_abort);
/* Block in aio_poll(), let other thread kick us and acquire context */
aio_context_acquire(ctx);
diff --git a/tests/test-rcu-list.c b/tests/test-rcu-list.c
index 192bfbf02e..9ea35a3dad 100644
--- a/tests/test-rcu-list.c
+++ b/tests/test-rcu-list.c
@@ -25,6 +25,7 @@
#include "qemu/rcu.h"
#include "qemu/thread.h"
#include "qemu/rcu_queue.h"
+#include "qapi/error.h"
/*
* Test variables.
@@ -68,7 +69,7 @@ static void create_thread(void *(*func)(void *))
exit(-1);
}
qemu_thread_create(&threads[n_threads], "test", func, &data[n_threads],
- QEMU_THREAD_JOINABLE);
+ QEMU_THREAD_JOINABLE, &error_abort);
n_threads++;
}
diff --git a/ui/vnc-jobs.c b/ui/vnc-jobs.c
index 8807d7217c..35a652d1fd 100644
--- a/ui/vnc-jobs.c
+++ b/ui/vnc-jobs.c
@@ -31,6 +31,7 @@
#include "vnc-jobs.h"
#include "qemu/sockets.h"
#include "qemu/main-loop.h"
+#include "qapi/error.h"
#include "block/aio.h"
/*
@@ -340,8 +341,11 @@ bool vnc_start_worker_thread(Error **errp)
}
q = vnc_queue_init();
- qemu_thread_create(&q->thread, "vnc_worker", vnc_worker_thread, q,
- QEMU_THREAD_DETACHED);
+ if (!qemu_thread_create(&q->thread, "vnc_worker", vnc_worker_thread,
+ q, QEMU_THREAD_DETACHED, errp)) {
+ vnc_queue_clear(q);
+ return false;
+ }
queue = q; /* Set global queue */
out:
return true;
diff --git a/util/compatfd.c b/util/compatfd.c
index d3ed890405..1ab94d423b 100644
--- a/util/compatfd.c
+++ b/util/compatfd.c
@@ -91,8 +91,13 @@ static int qemu_signalfd_compat(const sigset_t *mask, Error
**errp)
memcpy(&info->mask, mask, sizeof(*mask));
info->fd = fds[1];
- qemu_thread_create(&thread, "signalfd_compat", sigwait_compat, info,
- QEMU_THREAD_DETACHED);
+ if (!qemu_thread_create(&thread, "signalfd_compat", sigwait_compat,
+ info, QEMU_THREAD_DETACHED, errp)) {
+ close(fds[0]);
+ close(fds[1]);
+ free(info);
+ return -1;
+ }
return fds[0];
}
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index 13b6f8d776..85d0504f5a 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -364,9 +364,12 @@ static bool touch_all_pages(char *area, size_t hpagesize,
size_t numpages,
size_t size_per_thread;
char *addr = area;
int i = 0;
+ int started_thread = 0;
+ Error *local_err = NULL;
memset_thread_failed = false;
memset_num_threads = get_memset_num_threads(smp_cpus);
+ started_thread = memset_num_threads;
memset_thread = g_new0(MemsetThread, memset_num_threads);
numpages_per_thread = (numpages / memset_num_threads);
size_per_thread = (hpagesize * numpages_per_thread);
@@ -375,13 +378,19 @@ static bool touch_all_pages(char *area, size_t hpagesize,
size_t numpages,
memset_thread[i].numpages = (i == (memset_num_threads - 1)) ?
numpages : numpages_per_thread;
memset_thread[i].hpagesize = hpagesize;
- qemu_thread_create(&memset_thread[i].pgthread, "touch_pages",
- do_touch_pages, &memset_thread[i],
- QEMU_THREAD_JOINABLE);
+ if (!qemu_thread_create(&memset_thread[i].pgthread, "touch_pages",
+ do_touch_pages, &memset_thread[i],
+ QEMU_THREAD_JOINABLE, &local_err)) {
+ error_reportf_err(local_err, "failed to create do_touch_pages: ");
+ memset_thread_failed = true;
+ started_thread = i;
+ goto out;
+ }
addr += size_per_thread;
numpages -= numpages_per_thread;
}
- for (i = 0; i < memset_num_threads; i++) {
+out:
+ for (i = 0; i < started_thread; i++) {
qemu_thread_join(&memset_thread[i].pgthread);
}
g_free(memset_thread);
diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c
index 289af4fab5..8b044e2798 100644
--- a/util/qemu-thread-posix.c
+++ b/util/qemu-thread-posix.c
@@ -15,6 +15,7 @@
#include "qemu/atomic.h"
#include "qemu/notify.h"
#include "qemu-thread-common.h"
+#include "qapi/error.h"
static bool name_threads;
@@ -504,9 +505,9 @@ static void *qemu_thread_start(void *args)
return start_routine(arg);
}
-void qemu_thread_create(QemuThread *thread, const char *name,
- void *(*start_routine)(void*),
- void *arg, int mode)
+bool qemu_thread_create(QemuThread *thread, const char *name,
+ void *(*start_routine)(void *),
+ void *arg, int mode, Error **errp)
{
sigset_t set, oldset;
int err;
@@ -515,7 +516,9 @@ void qemu_thread_create(QemuThread *thread, const char
*name,
err = pthread_attr_init(&attr);
if (err) {
- error_exit(err, __func__);
+ error_setg(errp, "pthread_attr_init failed: %s", strerror(err));
+ errno = err;
+ return false;
}
if (mode == QEMU_THREAD_DETACHED) {
@@ -530,16 +533,21 @@ void qemu_thread_create(QemuThread *thread, const char
*name,
qemu_thread_args->name = g_strdup(name);
qemu_thread_args->start_routine = start_routine;
qemu_thread_args->arg = arg;
-
err = pthread_create(&thread->thread, &attr,
qemu_thread_start, qemu_thread_args);
-
- if (err)
- error_exit(err, __func__);
+ if (err) {
+ error_setg(errp, "pthread_create failed: %s", strerror(err));
+ errno = err;
+ pthread_attr_destroy(&attr);
+ g_free(qemu_thread_args->name);
+ g_free(qemu_thread_args);
+ return false;
+ }
pthread_sigmask(SIG_SETMASK, &oldset, NULL);
pthread_attr_destroy(&attr);
+ return true;
}
void qemu_thread_get_self(QemuThread *thread)
diff --git a/util/qemu-thread-win32.c b/util/qemu-thread-win32.c
index 1a27e1cf6f..96e5d19ca3 100644
--- a/util/qemu-thread-win32.c
+++ b/util/qemu-thread-win32.c
@@ -20,6 +20,7 @@
#include "qemu/thread.h"
#include "qemu/notify.h"
#include "qemu-thread-common.h"
+#include "qapi/error.h"
#include <process.h>
static bool name_threads;
@@ -388,9 +389,9 @@ void *qemu_thread_join(QemuThread *thread)
return ret;
}
-void qemu_thread_create(QemuThread *thread, const char *name,
- void *(*start_routine)(void *),
- void *arg, int mode)
+bool qemu_thread_create(QemuThread *thread, const char *name,
+ void *(*start_routine)(void *),
+ void *arg, int mode, Error **errp)
{
HANDLE hThread;
struct QemuThreadData *data;
@@ -409,10 +410,17 @@ void qemu_thread_create(QemuThread *thread, const char
*name,
hThread = (HANDLE) _beginthreadex(NULL, 0, win32_start_routine,
data, 0, &thread->tid);
if (!hThread) {
- error_exit(GetLastError(), __func__);
+ if (data->mode != QEMU_THREAD_DETACHED) {
+ DeleteCriticalSection(&data->cs);
+ }
+ error_setg_win32(errp, GetLastError(),
+ "failed to create win32_start_routine");
+ g_free(data);
+ return false;
}
CloseHandle(hThread);
thread->data = data;
+ return true;
}
void qemu_thread_get_self(QemuThread *thread)
diff --git a/util/rcu.c b/util/rcu.c
index 5676c22bd1..145dcdb0c6 100644
--- a/util/rcu.c
+++ b/util/rcu.c
@@ -32,6 +32,7 @@
#include "qemu/atomic.h"
#include "qemu/thread.h"
#include "qemu/main-loop.h"
+#include "qapi/error.h"
#if defined(CONFIG_MALLOC_TRIM)
#include <malloc.h>
#endif
@@ -325,7 +326,7 @@ static void rcu_init_complete(void)
* must have been quiescent even after forking, just recreate it.
*/
qemu_thread_create(&thread, "call_rcu", call_rcu_thread,
- NULL, QEMU_THREAD_DETACHED);
+ NULL, QEMU_THREAD_DETACHED, &error_abort);
rcu_register_thread();
}
diff --git a/util/thread-pool.c b/util/thread-pool.c
index 610646d131..ad0f980783 100644
--- a/util/thread-pool.c
+++ b/util/thread-pool.c
@@ -22,6 +22,7 @@
#include "trace.h"
#include "block/thread-pool.h"
#include "qemu/main-loop.h"
+#include "qapi/error.h"
static void do_spawn_thread(ThreadPool *pool);
@@ -132,7 +133,8 @@ static void do_spawn_thread(ThreadPool *pool)
pool->new_threads--;
pool->pending_threads++;
- qemu_thread_create(&t, "worker", worker_thread, pool,
QEMU_THREAD_DETACHED);
+ qemu_thread_create(&t, "worker", worker_thread, pool,
+ QEMU_THREAD_DETACHED, &error_abort);
}
static void spawn_thread_bh_fn(void *opaque)
--
2.13.7
- [Qemu-devel] [PATCH RFC v4 0/7] qemu_thread_create: propagate errors to callers to check, Fei Li, 2018/09/26
- [Qemu-devel] [PATCH RFC v4 2/7] ui/vnc.c: polish vnc_init_func, Fei Li, 2018/09/26
- [Qemu-devel] [PATCH RFC v4 1/7] Fix segmentation fault when qemu_signal_init fails, Fei Li, 2018/09/26
- [Qemu-devel] [PATCH RFC v4 3/7] qemu_init_vcpu: add a new Error parameter to propagate, Fei Li, 2018/09/26
- [Qemu-devel] [PATCH RFC v4 4/7] qemu_thread_join: fix segmentation fault, Fei Li, 2018/09/26
- [Qemu-devel] [PATCH RFC v4 5/7] migration: fix the multifd code, Fei Li, 2018/09/26
- [Qemu-devel] [PATCH RFC v4 6/7] migration: fix error handling, Fei Li, 2018/09/26
- [Qemu-devel] [PATCH RFC v4 7/7] qemu_thread_create: propagate the error to callers to handle,
Fei Li <=