path: root/meta/recipes-devtools/gdb
diff options
authorZhixiong Chi <>2018-09-18 19:26:35 -0700
committerRichard Purdie <>2018-09-20 05:41:25 -0700
commit435f671981a090bd06e8f3bf3436d58d531afd49 (patch)
treee6e58387018188f45c3452cecf3fcbfeaa5650f7 /meta/recipes-devtools/gdb
parentb76903b4b7bfec71be0a8a14e2cab4e2ec852222 (diff)
gdb: gdbserver: update ctrl-c handling
A) gdbserver sends SIGINT not to the process, but to the process group (-signal_pid). But the attached process is not always a process group leader. If not, "kill (-signal_pid, SIGINT)" returns error and fails to interrupt the attached process. We cannot interrupt the process attached with gdbserver who is not a process group leader. This problem was created by the gdb upstream commit 78708b7c8c The commit fixed the following case B) bug. B) We cannot interrupt the process attached with gdbserver whose main thread exits (pthread_exit()). Now this patch can solve both A) and B). Signed-off-by: Zhixiong Chi <> Signed-off-by: Ross Burton <>
Diffstat (limited to 'meta/recipes-devtools/gdb')
2 files changed, 27 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gdb/ b/meta/recipes-devtools/gdb/
index 999fdde031..dfb0059123 100644
--- a/meta/recipes-devtools/gdb/
+++ b/meta/recipes-devtools/gdb/
@@ -16,6 +16,7 @@ SRC_URI = "${PV}.tar.xz \
file://0009-Change-order-of-CFLAGS.patch \
file://0010-resolve-restrict-keyword-conflict.patch \
file://0011-Fix-invalid-sigprocmask-call.patch \
+ file://gdbserver-ctrl-c-handling.patch \
SRC_URI[md5sum] = "b5a49dbff00d9a87fbe114d14b3101c0"
SRC_URI[sha256sum] = "c3a441a29c7c89720b734e5a9c6289c0a06be7e0c76ef538f7bbcef389347c39"
diff --git a/meta/recipes-devtools/gdb/gdb/gdbserver-ctrl-c-handling.patch b/meta/recipes-devtools/gdb/gdb/gdbserver-ctrl-c-handling.patch
new file mode 100644
index 0000000000..dffb0dd81f
--- /dev/null
+++ b/meta/recipes-devtools/gdb/gdb/gdbserver-ctrl-c-handling.patch
@@ -0,0 +1,26 @@
++This problem was created by the upstream commit 78708b7c8c
++After applying the commit, it will send SIGINT to the process group(-signal_pid).
++But if we use gdbserver send SIGINT, and the attached process is not a process
++group leader, then the "kill (-signal_pid, SIGINT)" returns error and fails to
++interrupt the attached process.
++Upstream-Status: Submitted
++Author: Josh Gao
++Signed-off-by: Zhixiong Chi <>
+Index: gdb-8.2/gdb/gdbserver/linux-low.c
+--- gdb-8.2.orig/gdb/gdbserver/linux-low.c
++++ gdb-8.2/gdb/gdbserver/linux-low.c
+@@ -5940,9 +5940,7 @@ linux_look_up_symbols (void)
+ static void
+ linux_request_interrupt (void)
+ {
+- /* Send a SIGINT to the process group. This acts just like the user
+- typed a ^C on the controlling terminal. */
+- kill (-signal_pid, SIGINT);
++ kill (signal_pid, SIGINT);
+ }
+ /* Copy LEN bytes from inferior's auxiliary vector starting at OFFSET