[PATCH] osmocom-bb[master]: VIRT-PHY: enable proper memory leak debugging

[Harald Welte]

Review at  https://gerrit.osmocom.org/3295

VIRT-PHY: enable proper memory leak debugging

We make sure that all allocations are tracked back to one talloc root
context, and install the usual SIGUSR1 handler to dump the talloc
report.  This enables us to do interactive debugging for memory leaks
while virtphy is running.

Change-Id: I73b3cf86eea5f56595c1b045cf0fde8035ff185a
---
M src/host/virt_phy/src/virt_l1_sched_simple.c
M src/host/virt_phy/src/virtphy.c
2 files changed, 26 insertions(+), 3 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmocom-bb refs/changes/95/3295/1

diff --git a/src/host/virt_phy/src/virt_l1_sched_simple.c b/src/host/virt_phy/src/virt_l1_sched_simple.c
index 7d1cdd4..ba8298f 100644
--- a/src/host/virt_phy/src/virt_l1_sched_simple.c
+++ b/src/host/virt_phy/src/virt_l1_sched_simple.c
@@ -127,7 +127,7 @@
 	}
 	if (!mi_fn) {
 		/* list did not contain mframe item with needed fn */
-		mi_fn = talloc_zero(NULL, struct virt_l1_sched_mframe_item);
+		mi_fn = talloc_zero(ms, struct virt_l1_sched_mframe_item);
 		mi_fn->fn = fn;
 		/* need to manually init the struct content.... no so happy */
 		mi_fn->tdma_item_list.prev = &mi_fn->tdma_item_list;
diff --git a/src/host/virt_phy/src/virtphy.c b/src/host/virt_phy/src/virtphy.c
index e0bee72..412b742 100644
--- a/src/host/virt_phy/src/virtphy.c
+++ b/src/host/virt_phy/src/virtphy.c
@@ -23,12 +23,14 @@
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/select.h>
 #include <osmocom/core/gsmtap.h>
+#include <osmocom/core/application.h>
 #include <stdint.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <getopt.h>
 #include <errno.h>
+#include <signal.h>
 #include <virtphy/virtual_um.h>
 #include <virtphy/l1ctl_sock.h>
 #include <virtphy/virt_l1_model.h>
@@ -168,8 +170,29 @@
 	l1_model_ms_destroy(ms);
 }
 
+static void *tall_vphy_ctx;
+
+static void signal_handler(int signum)
+{
+	LOGP(DMAIN, LOGL_NOTICE, "Signal %d received\n", signum);
+
+	switch (signum) {
+	case SIGUSR1:
+		talloc_report_full(tall_vphy_ctx, stderr);
+		break;
+	default:
+		break;
+	}
+}
+
 int main(int argc, char *argv[])
 {
+	tall_vphy_ctx = talloc_named_const(NULL, 1, "root");
+
+	msgb_talloc_ctx_init(tall_vphy_ctx, 0);
+	signal(SIGUSR1, &signal_handler);
+	osmo_init_ignore_signals();
+
 	/* init loginfo */
 	handle_options(argc, argv);
 
@@ -177,10 +200,10 @@
 
 	LOGP(DVIRPHY, LOGL_INFO, "Virtual physical layer starting up...\n");
 
-	g_vphy.virt_um = virt_um_init(NULL, ul_tx_grp, port, dl_rx_grp, port,
+	g_vphy.virt_um = virt_um_init(tall_vphy_ctx, ul_tx_grp, port, dl_rx_grp, port,
 					gsmtapl1_rx_from_virt_um_inst_cb);
 
-	g_vphy.l1ctl_sock = l1ctl_sock_init(NULL, l1ctl_sap_rx_from_l23_inst_cb,
+	g_vphy.l1ctl_sock = l1ctl_sock_init(tall_vphy_ctx, l1ctl_sap_rx_from_l23_inst_cb,
 					    l1ctl_accept_cb, l1ctl_close_cb, l1ctl_sock_path);
 	g_vphy.virt_um->priv = g_vphy.l1ctl_sock;
 

-- 
To view, visit https://gerrit.osmocom.org/3295
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I73b3cf86eea5f56595c1b045cf0fde8035ff185a
Gerrit-PatchSet: 1
Gerrit-Project: osmocom-bb
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>