varun-r-mallya/sysprof
1
0
Fork 0
mirror of https://github.com/varun-r-mallya/sysprof.git synced 2025-12-31 20:36:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

libsysprof: provide unwind pipe from client

Browse Source 
We don't need a socketpair for this. Additionally, things seem to work
better from the service when the client provides the pipe. Otherwise, when
running as a dbus service I often have issues with things getting closed
out from under us.
This commit is contained in:
Christian Hergert
2024-11-13 15:40:52 -08:00
parent 8995c65444
commit 083b2edbc0
3 changed files with 48 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
src/sysprofd/ipc-unwinder-impl.c
View File

@ -24,6 +24,7 @@
#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/prctl.h>
@ -71,19 +72,16 @@ ipc_unwinder_impl_handle_unwind (IpcUnwinder *unwinder,
GUnixFDList *fd_list,
guint stack_size,
GVariant *arg_perf_fds,
GVariant *arg_event_fd)
GVariant *arg_event_fd,
GVariant *arg_capture_fd)
{
g_autoptr(GSubprocessLauncher) launcher = NULL;
g_autoptr(GSubprocess) subprocess = NULL;
g_autoptr(GUnixFDList) out_fd_list = NULL;
g_autoptr(GPtrArray) argv = NULL;
g_autoptr(GError) error = NULL;
g_autofd int our_fd = -1;
g_autofd int their_fd = -1;
g_autofd int capture_fd = -1;
g_autofd int event_fd = -1;
GVariantIter iter;
int capture_fd_handle;
int pair[2];
int next_target_fd = 3;
int perf_fd_handle;
int cpu;
@ -116,13 +114,14 @@ ipc_unwinder_impl_handle_unwind (IpcUnwinder *unwinder,
g_ptr_array_add (argv, g_strdup (PACKAGE_LIBEXECDIR "/sysprof-live-unwinder"));
g_ptr_array_add (argv, g_strdup_printf ("--stack-size=%u", stack_size));
if (-1 == (event_fd = g_unix_fd_list_get (fd_list, g_variant_get_handle (arg_event_fd), &error)))
if (-1 == (event_fd = g_unix_fd_list_get (fd_list, g_variant_get_handle (arg_event_fd), &error)) ||
-1 == (capture_fd = g_unix_fd_list_get (fd_list, g_variant_get_handle (arg_capture_fd), &error)))
{
g_dbus_method_invocation_return_gerror (g_steal_pointer (&invocation), error);
return TRUE;
}
g_ptr_array_add (argv, g_strdup_printf ("--event-fd=%u", next_target_fd));
g_ptr_array_add (argv, g_strdup_printf ("--event-fd=%d", next_target_fd));
g_subprocess_launcher_take_fd (launcher, g_steal_fd (&event_fd), next_target_fd++);
g_variant_iter_init (&iter, arg_perf_fds);
@ -143,32 +142,8 @@ ipc_unwinder_impl_handle_unwind (IpcUnwinder *unwinder,
next_target_fd++);
}
g_subprocess_launcher_set_child_setup (launcher, child_setup, NULL, NULL);
if (socketpair (AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, pair) < 0)
{
int errsv = errno;
g_dbus_method_invocation_return_error_literal (g_steal_pointer (&invocation),
G_IO_ERROR,
g_io_error_from_errno (errsv),
g_strerror (errsv));
return TRUE;
}
our_fd = g_steal_fd (&pair[0]);
their_fd = g_steal_fd (&pair[1]);
out_fd_list = g_unix_fd_list_new ();
capture_fd_handle = g_unix_fd_list_append (out_fd_list, their_fd, &error);
if (capture_fd_handle < 0)
{
g_dbus_method_invocation_return_gerror (g_steal_pointer (&invocation), error);
return TRUE;
}
g_ptr_array_add (argv, g_strdup_printf ("--capture-fd=%d", next_target_fd));
g_subprocess_launcher_take_fd (launcher, g_steal_fd (&our_fd), next_target_fd++);
g_subprocess_launcher_take_fd (launcher, g_steal_fd (&capture_fd), next_target_fd++);
g_ptr_array_add (argv, NULL);
@ -182,10 +157,7 @@ ipc_unwinder_impl_handle_unwind (IpcUnwinder *unwinder,
g_message ("sysprof-live-unwinder started as process %s",
g_subprocess_get_identifier (subprocess));
ipc_unwinder_complete_unwind (unwinder,
g_steal_pointer (&invocation),
out_fd_list,
g_variant_new_handle (capture_fd_handle));
ipc_unwinder_complete_unwind (unwinder, g_steal_pointer (&invocation), NULL);
g_subprocess_wait_check_async (subprocess,
NULL,

2
src/sysprofd/org.gnome.Sysprof3.Unwinder.xml
View File

@ -17,7 +17,7 @@
<arg type="u" name="stack_size" direction="in"/>
<arg type="a(hi)" name="perf_fds" direction="in"/>
<arg type="h" name="event_fd" direction="in"/>
<arg type="h" name="capture_fd" direction="out"/>
<arg type="h" name="capture_fd" direction="in"/>
</method>
</interface>
</node>