Lots that can go wrong here, and most likely we'll want to redo how
selections work over time to use a drag gesture instead of the sort
of annoying click/motion stuff we're doing here.
pathnames are listed unescaped in /proc/[pid]/maps, so using %s as the
conversion specifier cuts pathnames off at space characters. Use %[^\n]
instead, to read everything until the end of the line.
Also, the scanf manpage states: "String input conversions store a
terminating null byte ('\0') to mark the end of the input; the maximum
field width does not include this terminator". So set the maximum field
width to 511 instead of 512, to leave one free byte in the buffer for
the terminating null byte.
Fixes#70
The order in which the argument list is evaluated is unspecified, so it
was possible for g_steal_pointer to set self = NULL before
self->old_governor was evaluated, resulting in a crash:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007f6efc678d84 in enable_paranoid_cb (object=0x561a4d147c80, result=0x561a4d173560, user_data=0x561a4d09d610) at ../src/libsysprof/sysprof-governor-source.c:290
290 self->old_governor,
[Current thread is 1 (Thread 0x7f6efae4b600 (LWP 122786))]
(gdb) bt
#0 0x00007f6efc678d84 in enable_paranoid_cb (object=0x561a4d147c80 [SysprofHelpers], result=0x561a4d173560, user_data=0x561a4d09d610) at ../src/libsysprof/sysprof-governor-source.c:290
#1 0x00007f6efd51b389 in g_task_return_now (task=0x561a4d173560 [GTask]) at ../../../gio/gtask.c:1219
#2 0x00007f6efd51becb in g_task_return (type=<optimized out>, task=0x561a4d173560 [GTask]) at ../../../gio/gtask.c:1289
#3 g_task_return (task=0x561a4d173560 [GTask], type=<optimized out>) at ../../../gio/gtask.c:1245
#4 0x00007f6efc6a6060 in sysprof_helpers_set_paranoid_cb (object=0x561a4cf9df90 [IpcServiceProxy], result=0x561a4d1736e0, user_data=0x561a4d173560) at ../src/libsysprof/sysprof-helpers.c:788
#5 0x00007f6efd51b389 in g_task_return_now (task=0x561a4d1736e0 [GTask]) at ../../../gio/gtask.c:1219
#6 0x00007f6efd51becb in g_task_return (type=<optimized out>, task=0x561a4d1736e0 [GTask]) at ../../../gio/gtask.c:1289
#7 g_task_return (task=0x561a4d1736e0 [GTask], type=<optimized out>) at ../../../gio/gtask.c:1245
#8 0x00007f6efd5830cb in reply_cb (connection=<optimized out>, res=<optimized out>, user_data=user_data@entry=0x561a4d1736e0) at ../../../gio/gdbusproxy.c:2568
#9 0x00007f6efd51b389 in g_task_return_now (task=0x561a4d22b000 [GTask]) at ../../../gio/gtask.c:1219
#10 0x00007f6efd51becb in g_task_return (type=<optimized out>, task=0x561a4d22b000 [GTask]) at ../../../gio/gtask.c:1289
#11 g_task_return (task=0x561a4d22b000 [GTask], type=<optimized out>) at ../../../gio/gtask.c:1245
#12 0x00007f6efd577cbf in g_dbus_connection_call_done (source=<optimized out>, result=0x561a4d22b0c0, user_data=user_data@entry=0x561a4d22b000) at ../../../gio/gdbusconnection.c:5797
#13 0x00007f6efd51b389 in g_task_return_now (task=0x561a4d22b0c0 [GTask]) at ../../../gio/gtask.c:1219
#14 0x00007f6efd51b3c9 in complete_in_idle_cb (task=0x561a4d22b0c0) at ../../../gio/gtask.c:1233
#15 0x00007f6efd32db84 in g_main_dispatch (context=0x561a4cb60af0) at ../../../glib/gmain.c:3381
#16 g_main_context_dispatch (context=0x561a4cb60af0) at ../../../glib/gmain.c:4099
#17 0x00007f6efd32df28 in g_main_context_iterate (context=context@entry=0x561a4cb60af0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4175
#18 0x00007f6efd32dfdf in g_main_context_iteration (context=context@entry=0x561a4cb60af0, may_block=may_block@entry=1) at ../../../glib/gmain.c:4240
#19 0x00007f6efd54a06d in g_application_run (application=0x561a4cb56120 [SysprofApplication], argc=<optimized out>, argv=<optimized out>) at ../../../gio/gapplication.c:2569
#20 0x0000561a4b2edd14 in main (argc=1, argv=0x7ffddcebb708) at ../src/sysprof/sysprof.c:44
(gdb) info locals
helpers = 0x561a4d147c80 [SysprofHelpers]
self = 0x0
error = 0x0
old_governor = -1
__func__ = "enable_paranoid_cb"
