* [Bug translator/5634] New: support pointer type punning
@ 2008-01-17 18:32 fche at redhat dot com
2008-03-11 18:35 ` [Bug translator/5634] " jkenisto at us dot ibm dot com
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: fche at redhat dot com @ 2008-01-17 18:32 UTC (permalink / raw)
To: systemtap
It would be helpful to have a syntax for pointer type casting,
for times when the static type of the pointer does not match
the dynamic (actual) type. Currently, this requires embedded-C
code to get around.
Perhaps like this:
$ptr("struct tcp_socket")->tcp_socket_field
A more C-like syntax would be:
((struct tcp_socket*)$ptr)->tcp_socket_field
but parsing that is much more complicated.
--
Summary: support pointer type punning
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: fche at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=5634
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* [Bug translator/5634] support pointer type punning
2008-01-17 18:32 [Bug translator/5634] New: support pointer type punning fche at redhat dot com
@ 2008-03-11 18:35 ` jkenisto at us dot ibm dot com
2008-05-19 23:41 ` mhiramat at redhat dot com
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jkenisto at us dot ibm dot com @ 2008-03-11 18:35 UTC (permalink / raw)
To: systemtap
------- Additional Comments From jkenisto at us dot ibm dot com 2008-03-11 18:34 -------
Yes, this would be very useful, whatever the syntax.
In the example given, the pointer is a target variable ($ptr), but it seems
important to be able to cast script variables as well.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=5634
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* [Bug translator/5634] support pointer type punning
2008-01-17 18:32 [Bug translator/5634] New: support pointer type punning fche at redhat dot com
2008-03-11 18:35 ` [Bug translator/5634] " jkenisto at us dot ibm dot com
@ 2008-05-19 23:41 ` mhiramat at redhat dot com
2008-06-27 23:13 ` fche at redhat dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: mhiramat at redhat dot com @ 2008-05-19 23:41 UTC (permalink / raw)
To: systemtap
------- Additional Comments From mhiramat at redhat dot com 2008-05-19 21:19 -------
Can this support casting to an array like below?
((struct tcp_socket[])$ptr)[1]->tcp_socket_field
or
$ptr("struct tcp_socket []")[0]->tcp_socket_field
--
http://sourceware.org/bugzilla/show_bug.cgi?id=5634
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* [Bug translator/5634] support pointer type punning
2008-01-17 18:32 [Bug translator/5634] New: support pointer type punning fche at redhat dot com
2008-03-11 18:35 ` [Bug translator/5634] " jkenisto at us dot ibm dot com
2008-05-19 23:41 ` mhiramat at redhat dot com
@ 2008-06-27 23:13 ` fche at redhat dot com
2008-08-01 14:28 ` twoerner at redhat dot com
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: fche at redhat dot com @ 2008-06-27 23:13 UTC (permalink / raw)
To: systemtap
------- Additional Comments From fche at redhat dot com 2008-06-27 20:51 -------
*** Bug 6704 has been marked as a duplicate of this bug. ***
--
http://sourceware.org/bugzilla/show_bug.cgi?id=5634
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* [Bug translator/5634] support pointer type punning
2008-01-17 18:32 [Bug translator/5634] New: support pointer type punning fche at redhat dot com
` (2 preceding siblings ...)
2008-06-27 23:13 ` fche at redhat dot com
@ 2008-08-01 14:28 ` twoerner at redhat dot com
2008-08-01 14:29 ` twoerner at redhat dot com
2009-01-30 2:13 ` fche at redhat dot com
5 siblings, 0 replies; 7+ messages in thread
From: twoerner at redhat dot com @ 2008-08-01 14:28 UTC (permalink / raw)
To: systemtap
--
What |Removed |Added
----------------------------------------------------------------------------
GCC build triplet| |twoerner@redhat.com
http://sourceware.org/bugzilla/show_bug.cgi?id=5634
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* [Bug translator/5634] support pointer type punning
2008-01-17 18:32 [Bug translator/5634] New: support pointer type punning fche at redhat dot com
` (3 preceding siblings ...)
2008-08-01 14:28 ` twoerner at redhat dot com
@ 2008-08-01 14:29 ` twoerner at redhat dot com
2009-01-30 2:13 ` fche at redhat dot com
5 siblings, 0 replies; 7+ messages in thread
From: twoerner at redhat dot com @ 2008-08-01 14:29 UTC (permalink / raw)
To: systemtap
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |twoerner at redhat dot com
GCC build triplet|twoerner@redhat.com |
http://sourceware.org/bugzilla/show_bug.cgi?id=5634
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* [Bug translator/5634] support pointer type punning
2008-01-17 18:32 [Bug translator/5634] New: support pointer type punning fche at redhat dot com
` (4 preceding siblings ...)
2008-08-01 14:29 ` twoerner at redhat dot com
@ 2009-01-30 2:13 ` fche at redhat dot com
5 siblings, 0 replies; 7+ messages in thread
From: fche at redhat dot com @ 2009-01-30 2:13 UTC (permalink / raw)
To: systemtap
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|systemtap at sources dot |jistone at redhat dot com
|redhat dot com |
Status|NEW |ASSIGNED
http://sourceware.org/bugzilla/show_bug.cgi?id=5634
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end of thread, other threads:[~2009-01-29 21:34 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2008-01-17 18:32 [Bug translator/5634] New: support pointer type punning fche at redhat dot com
2008-03-11 18:35 ` [Bug translator/5634] " jkenisto at us dot ibm dot com
2008-05-19 23:41 ` mhiramat at redhat dot com
2008-06-27 23:13 ` fche at redhat dot com
2008-08-01 14:28 ` twoerner at redhat dot com
2008-08-01 14:29 ` twoerner at redhat dot com
2009-01-30 2:13 ` fche at redhat dot com
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