From 2113ac4cbb12b815804e8873d761cade9ddf49b9 Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Fri, 31 Mar 2017 20:35:51 -0400 Subject: Don't use bgw_main even to specify in-core bgworker entrypoints. On EXEC_BACKEND builds, this can fail if ASLR is in use. Backpatch to 9.5. On master, completely remove the bgw_main field completely, since there is no situation in which it is safe for an EXEC_BACKEND build. On 9.6 and 9.5, leave the field intact to avoid breaking things for third-party code that doesn't care about working under EXEC_BACKEND. Prior to 9.5, there are no in-core bgworker entrypoints. Petr Jelinek, reviewed by me. Discussion: http://postgr.es/m/09d8ad33-4287-a09b-a77f-77f8761adb5e@2ndquadrant.com --- src/test/modules/test_shm_mq/setup.c | 1 - src/test/modules/worker_spi/worker_spi.c | 4 ++-- 2 files changed, 2 insertions(+), 3 deletions(-) (limited to 'src/test/modules') diff --git a/src/test/modules/test_shm_mq/setup.c b/src/test/modules/test_shm_mq/setup.c index e3c024ecb4c..319a67f49aa 100644 --- a/src/test/modules/test_shm_mq/setup.c +++ b/src/test/modules/test_shm_mq/setup.c @@ -216,7 +216,6 @@ setup_background_workers(int nworkers, dsm_segment *seg) worker.bgw_flags = BGWORKER_SHMEM_ACCESS; worker.bgw_start_time = BgWorkerStart_ConsistentState; worker.bgw_restart_time = BGW_NEVER_RESTART; - worker.bgw_main = NULL; /* new worker might not have library loaded */ sprintf(worker.bgw_library_name, "test_shm_mq"); sprintf(worker.bgw_function_name, "test_shm_mq_main"); snprintf(worker.bgw_name, BGW_MAXLEN, "test_shm_mq"); diff --git a/src/test/modules/worker_spi/worker_spi.c b/src/test/modules/worker_spi/worker_spi.c index 72ab8464e12..421ec76ba36 100644 --- a/src/test/modules/worker_spi/worker_spi.c +++ b/src/test/modules/worker_spi/worker_spi.c @@ -347,7 +347,8 @@ _PG_init(void) BGWORKER_BACKEND_DATABASE_CONNECTION; worker.bgw_start_time = BgWorkerStart_RecoveryFinished; worker.bgw_restart_time = BGW_NEVER_RESTART; - worker.bgw_main = worker_spi_main; + sprintf(worker.bgw_library_name, "worker_spi"); + sprintf(worker.bgw_function_name, "worker_spi_main"); worker.bgw_notify_pid = 0; /* @@ -378,7 +379,6 @@ worker_spi_launch(PG_FUNCTION_ARGS) BGWORKER_BACKEND_DATABASE_CONNECTION; worker.bgw_start_time = BgWorkerStart_RecoveryFinished; worker.bgw_restart_time = BGW_NEVER_RESTART; - worker.bgw_main = NULL; /* new worker might not have library loaded */ sprintf(worker.bgw_library_name, "worker_spi"); sprintf(worker.bgw_function_name, "worker_spi_main"); snprintf(worker.bgw_name, BGW_MAXLEN, "worker %d", i); -- cgit v1.2.3