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[Bug runtime/13445] New: control.c:137: error: the frame size of 264 bytes is larger than 256 bytes


http://sourceware.org/bugzilla/show_bug.cgi?id=13445

             Bug #: 13445
           Summary: control.c:137: error: the frame size of 264 bytes is
                    larger than 256 bytes
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap@sourceware.org
        ReportedBy: mjw@redhat.com
    Classification: Unclassified


After commit 5137a7 'PR13354: remote_id() and remote_uri() tapset functions', I
get the following on s390x (linux kernel 2.6.32-220.el6.s390x with gcc 4.4.6
20110731):

cc1: warnings being treated as errors
In file included from
/root/install/share/systemtap/runtime/transport/transport.c:64,
                 from /root/install/share/systemtap/runtime/print.c:17,
                 from
/root/install/share/systemtap/runtime/runtime_context.h:16,
                 from
/tmp/stapxAwe7M/stap_1dec37041fd9e653dbc51ff80f43b08b_11496_src.c:760:
/root/install/share/systemtap/runtime/transport/control.c: In function
'_stp_ctl_write_cmd':
/root/install/share/systemtap/runtime/transport/control.c:137: error: the frame
size of 264 bytes is larger than 256 bytes
make[4]: ***
[/tmp/stapxAwe7M/stap_1dec37041fd9e653dbc51ff80f43b08b_11496_src.o] Error 1
make[3]: *** [_module_/tmp/stapxAwe7M] Error 2
Warning: make exited with status: 2
Pass 4: compilation failed.  Try again with another '--vp 0001' option.
cc1: warnings being treated as errors
In file included from
/root/install/share/systemtap/runtime/transport/transport.c:64,
                 from /root/install/share/systemtap/runtime/print.c:17,
                 from
/root/install/share/systemtap/runtime/runtime_context.h:16,
                 from
/tmp/stapRqzvga/stap_a144ec68e3c5391511845677ec024c53_11000_src.c:760:
/root/install/share/systemtap/runtime/transport/control.c: In function
'_stp_ctl_write_cmd':
/root/install/share/systemtap/runtime/transport/control.c:137: error: the frame
size of 264 bytes is larger than 256 bytes
make[4]: ***
[/tmp/stapRqzvga/stap_a144ec68e3c5391511845677ec024c53_11000_src.o] Error 1
make[3]: *** [_module_/tmp/stapRqzvga] Error 2
Warning: make exited with status: 2
Pass 4: compilation failed.  Try again with another '--vp 0001' option.

This is caused by the handling of STP_REMOTE_ID in _stp_ctl_write_cmd which
places a struct _stp_msg_remote_id rem; on the stack. Which is rather large:

#define STP_REMOTE_URI_LEN 128
struct _stp_msg_remote_id
{
        int32_t remote_id;
        char remote_uri[STP_REMOTE_URI_LEN];
};

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