From 76a5c0e433eb0a4a941e0bf9172e55c6f8058ed4 Mon Sep 17 00:00:00 2001 From: Craig Tiller Date: Wed, 9 Mar 2016 09:05:30 -0800 Subject: Fix memory leak: keep all resolver calls under the same lock --- src/core/channel/client_channel.c | 29 ++++++++++------------------- 1 file changed, 10 insertions(+), 19 deletions(-) (limited to 'src/core') diff --git a/src/core/channel/client_channel.c b/src/core/channel/client_channel.c index d4ba950818..f021a8ae32 100644 --- a/src/core/channel/client_channel.c +++ b/src/core/channel/client_channel.c @@ -165,7 +165,6 @@ static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg, channel_data *chand = arg; grpc_lb_policy *lb_policy = NULL; grpc_lb_policy *old_lb_policy; - grpc_resolver *old_resolver; grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE; int exit_idle = 0; @@ -201,28 +200,25 @@ static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg, } if (iomgr_success && chand->resolver) { - grpc_resolver *resolver = chand->resolver; - GRPC_RESOLVER_REF(resolver, "channel-next"); grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, state, "new_lb+resolver"); if (lb_policy != NULL) { watch_lb_policy(exec_ctx, chand, lb_policy, state); } - gpr_mu_unlock(&chand->mu_config); GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver"); - grpc_resolver_next(exec_ctx, resolver, &chand->incoming_configuration, + grpc_resolver_next(exec_ctx, chand->resolver, + &chand->incoming_configuration, &chand->on_config_changed); - GRPC_RESOLVER_UNREF(exec_ctx, resolver, "channel-next"); + gpr_mu_unlock(&chand->mu_config); } else { - old_resolver = chand->resolver; - chand->resolver = NULL; + if (chand->resolver != NULL) { + grpc_resolver_shutdown(exec_ctx, chand->resolver); + GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel"); + chand->resolver = NULL; + } grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, GRPC_CHANNEL_FATAL_FAILURE, "resolver_gone"); gpr_mu_unlock(&chand->mu_config); - if (old_resolver != NULL) { - grpc_resolver_shutdown(exec_ctx, old_resolver); - GRPC_RESOLVER_UNREF(exec_ctx, old_resolver, "channel"); - } } if (exit_idle) { @@ -247,7 +243,6 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_transport_op *op) { channel_data *chand = elem->channel_data; - grpc_resolver *destroy_resolver = NULL; grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, true, NULL); @@ -279,7 +274,8 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx, if (op->disconnect && chand->resolver != NULL) { grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, GRPC_CHANNEL_FATAL_FAILURE, "disconnect"); - destroy_resolver = chand->resolver; + grpc_resolver_shutdown(exec_ctx, chand->resolver); + GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel"); chand->resolver = NULL; if (chand->lb_policy != NULL) { grpc_pollset_set_del_pollset_set(exec_ctx, @@ -290,11 +286,6 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx, } } gpr_mu_unlock(&chand->mu_config); - - if (destroy_resolver) { - grpc_resolver_shutdown(exec_ctx, destroy_resolver); - GRPC_RESOLVER_UNREF(exec_ctx, destroy_resolver, "channel"); - } } typedef struct { -- cgit v1.2.3