Hi,
This adds a new GDB parameter 'gcc-dot-cmd' which allows the user to
configure the command used to render the CFG within dot-fn.
E.g. with this patch the user can change their dot viewer like so:
(gdb) show gcc-dot-cmd
The current value of 'gcc-dot-cmd' is "dot -Tx11".
(gdb) set gcc-dot-cmd xdot
(gdb) dot-fn # opens in xdot
The second patch in this series adds a hook which users can define in
their .gdbinit in order to be called when the GCC extensions have
finished loading, thus allowing users to automatically configure
gcc-dot-cmd as desired in their .gdbinit.
Manually tested by debugging an x86 -> aarch64 cross, changing the
parameter, and invoking dot-fn.
OK to install?
Thanks,
Alex
gcc/ChangeLog:
* gdbhooks.py (GCCDotCmd): New.
(gcc_dot_cmd): New. Use it ...
(DotFn.invoke): ... here.
iff --git a/gcc/gdbhooks.py b/gcc/gdbhooks.py
index 92e38880a70..db8ce0d071b 100644
--- a/gcc/gdbhooks.py
+++ b/gcc/gdbhooks.py
@@ -783,6 +783,18 @@ class DumpFn(gdb.Command):
DumpFn()
+class GCCDotCmd(gdb.Parameter):
+ """
+ This parameter controls the command used to render dot files within
+ GCC's dot-fn command. It will be invoked as gcc-dot-cmd <dot-file>.
+ """
+ def __init__(self):
+ super(GCCDotCmd, self).__init__('gcc-dot-cmd',
+ gdb.COMMAND_NONE, gdb.PARAM_STRING)
+ self.value = "dot -Tx11"
+
+gcc_dot_cmd = GCCDotCmd()
+
class DotFn(gdb.Command):
"""
A custom command to show a gimple/rtl function control flow graph.
@@ -848,7 +860,8 @@ class DotFn(gdb.Command):
return
# Show graph in temp file
- os.system("( dot -Tx11 \"%s\"; rm \"%s\" ) &" % (filename, filename))
+ dot_cmd = gcc_dot_cmd.value
+ os.system("( %s \"%s\"; rm \"%s\" ) &" % (dot_cmd, filename, filename))
DotFn()
