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[v7,5/5] Update documentation on catching a group of related syscalls.

Message ID 1466368449-26477-6-git-send-email-gabriel@krisman.be
State New
Headers show

Commit Message

Gabriel Krisman Bertazi June 19, 2016, 8:34 p.m. UTC
Eli already approved this one.


	* break-catch-syscall.c (_initialize_breakpoint): Update catch
	syscall command documentation.
	* NEWS: Include section about catching groups of syscalls.


	* gdb.texinfo (Set Catchpoints): Add 'group' argument to catch
 gdb/NEWS                  |  5 +++++
 gdb/break-catch-syscall.c | 10 +++++-----
 gdb/doc/gdb.texinfo       | 28 +++++++++++++++++++++++++++-
 3 files changed, 37 insertions(+), 6 deletions(-)
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diff --git a/gdb/NEWS b/gdb/NEWS
index 340a751..a8d2700 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -46,6 +46,11 @@ 
   language.  See https://www.rust-lang.org/ for more information about
+* The "catch syscall" command catches groups of related syscalls.
+  The "catch syscall" command now supports catching a group of related
+  syscalls using the 'group:' or 'g:' prefix.
 * New commands
 skip -file file
diff --git a/gdb/break-catch-syscall.c b/gdb/break-catch-syscall.c
index c564b8f..602aba4 100644
--- a/gdb/break-catch-syscall.c
+++ b/gdb/break-catch-syscall.c
@@ -724,11 +724,11 @@  _initialize_break_catch_syscall (void)
   add_catch_command ("syscall", _("\
-Catch system calls by their names and/or numbers.\n\
-Arguments say which system calls to catch.  If no arguments\n\
-are given, every system call will be caught.\n\
-Arguments, if given, should be one or more system call names\n\
-(if your system supports that), or system call numbers."),
+Catch system calls by their names, groups and/or numbers.\n\
+Arguments say which system calls to catch.  If no arguments are given,\n\
+every system call will be caught.  Arguments, if given, should be one\n\
+or more system call names (if your system supports that), system call\n\
+groups or system call numbers."),
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 795a70b..7be08d2 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -4375,7 +4375,7 @@  A failed Ada assertion.
 A call to @code{exec}.
 @item syscall
-@itemx syscall @r{[}@var{name} @r{|} @var{number}@r{]} @dots{} 
+@itemx syscall @r{[}@var{name} @r{|} @var{number} @r{|} @r{group:}@var{groupname} @r{|} @r{g:}@var{groupname}@r{]} @dots{}
 @kindex catch syscall
 @cindex break on a system call.
 A call to or return from a system call, a.k.a.@: @dfn{syscall}.  A
@@ -4410,6 +4410,15 @@  may be useful if @value{GDBN}'s database does not have the complete
 list of syscalls on your system (e.g., because @value{GDBN} lags
 behind the OS upgrades).
+You may specify a group of related syscalls to be caught at once using
+the @code{group:} syntax (@code{g:} is a shorter equivalent).  For
+instance, on some platforms @value{GDBN} allows you to catch all
+network related syscalls, by passing the argument @code{group:network}
+to @code{catch syscall}.  Note that not all syscall groups are
+available in every system.  You can use the command completion
+facilities (@pxref{Completion,, command completion}) to list the
+syscall groups available on your environment.
 The example below illustrates how this command works if you don't provide
 arguments to it:
@@ -4466,6 +4475,23 @@  Program exited normally.
 @end smallexample
+Here is an example of catching a syscall group:
+(@value{GDBP}) catch syscall group:process
+Catchpoint 1 (syscalls 'exit' [1] 'fork' [2] 'waitpid' [7]
+'execve' [11] 'wait4' [114] 'clone' [120] 'vfork' [190]
+'exit_group' [252] 'waitid' [284] 'unshare' [310])
+(@value{GDBP}) r
+Starting program: /tmp/catch-syscall
+Catchpoint 1 (call to syscall fork), 0x00007ffff7df4e27 in open64 ()
+   from /lib64/ld-linux-x86-64.so.2
+(@value{GDBP}) c
+@end smallexample
 However, there can be situations when there is no corresponding name
 in XML file for that syscall number.  In this case, @value{GDBN} prints
 a warning message saying that it was not able to find the syscall name,