On 18/07/2019 6:25 pm, Baesken, Matthias wrote:
Hi David, do you see an issue using p2i with char* pointers , should I add a cast or some other conversion ? (afaik it is usually used without other casts/conversions in the codebase)
jdk/src/hotspot/share/utilities/globalDefinitions.hpp :
1055 // Convert pointer to intptr_t, for use in printing pointers. 1056 inline intptr_t p2i(const void * p) { 1057 return (intptr_t) p; 1058 }
p2i is what you should always use when printing a pointer to convert it to an integral type. But it should really be used with INTPTR_FORMAT. It will work with PTR_FORMAT due to other integral conversions.
If this fixes things on AIX then that's fine.
Yes it does . But I have to agree with you it feels a bit shaky ...
Changing PTR_FORMAT to INTPTR_FORMAT would remove that shakiness IMHO. :) Cheers, David
Regards, Matthias
-----Original Message----- From: David Holmes <david.holmes@oracle.com> Sent: Donnerstag, 18. Juli 2019 10:05 To: Baesken, Matthias <matthias.baesken@sap.com>; Langer, Christoph <christoph.langer@sap.com>; 'hotspot-dev@openjdk.java.net' <hotspot- dev@openjdk.java.net>; 'ppc-aix-port-dev@openjdk.java.net' <ppc-aix- port-dev@openjdk.java.net> Subject: Re: RFR : 8227869: fix wrong format specifiers in os_aix.cpp
On 18/07/2019 5:40 pm, Baesken, Matthias wrote:
pointers should be used with PTR_FORMAT. p2i(p) should be used with INTPTR_FORMAT. So the above looks like it was already correct and now is not correct.
Hi David, I noticed p2i is used together with PTR_FORMAT at dozens locations in the HS code , did I miss something ?
Okay our usage is a bit of a historical mess. :(
In os_aix.cpp we currently get these warnings , seems PTR_FORMAT is unsigned long , that’s why we see these warnings :
Defining PTR_FORMAT as an integral format it just broken - but dates back forever because %p wasn't portable.
If this fixes things on AIX then that's fine. For new code I'd recommend use of INTPTR_FORMAT and p2i to print pointers.
Thanks, David
/nightly/jdk/src/hotspot/os/aix/os_aix.cpp:1894:15: warning: format
specifies type 'unsigned long' but the argument has type 'char *' [-Wformat]
p, p + s, addr, addr + size); ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/misc_aix.hpp:40:28: note: expanded from
macro 'trcVerbose'
fprintf(stderr, fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/os_aix.cpp:1894:18: warning: format
specifies type 'unsigned long' but the argument has type 'char *' [-Wformat]
p, p + s, addr, addr + size); ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/misc_aix.hpp:40:28: note: expanded from
macro 'trcVerbose'
fprintf(stderr, fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/os_aix.cpp:1894:25: warning: format
specifies type 'unsigned long' but the argument has type 'char *' [-Wformat]
p, p + s, addr, addr + size); ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/misc_aix.hpp:40:28: note: expanded from
macro 'trcVerbose'
fprintf(stderr, fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/os_aix.cpp:1894:31: warning: format
specifies type 'unsigned long' but the argument has type 'char *' [-Wformat]
p, p + s, addr, addr + size); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/misc_aix.hpp:40:28: note: expanded from
macro 'trcVerbose'
fprintf(stderr, fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/os_aix.cpp:1899:45: warning: format
specifies type 'unsigned long' but the argument has type 'char *' [-Wformat]
" aligned to pagesize (%lu)", p, p + s, (unsigned long) pagesize);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
/nightly/jdk/src/hotspot/os/aix/misc_aix.hpp:40:28: note: expanded from macro 'trcVerbose' fprintf(stderr, fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ /nightly/jdk/src/hotspot/os/aix/os_aix.cpp:1899:48: warning: format specifies type 'unsigned long' but the argument has type 'char *' [-Wformat] " aligned to pagesize (%lu)", p, p + s, (unsigned long) pagesize);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
Best regards, Matthias
-----Original Message----- From: David Holmes <david.holmes@oracle.com> Sent: Donnerstag, 18. Juli 2019 09:08 To: Baesken, Matthias <matthias.baesken@sap.com>; Langer, Christoph <christoph.langer@sap.com>; 'hotspot-dev@openjdk.java.net' <hotspot- dev@openjdk.java.net>; 'ppc-aix-port-dev@openjdk.java.net' <ppc-aix- port-dev@openjdk.java.net> Subject: Re: RFR : 8227869: fix wrong format specifiers in os_aix.cpp
Hi Matthias,
On 18/07/2019 5:00 pm, Baesken, Matthias wrote:
Thanks ! May I get a second review please ?
@@ -1888,12 +1887,12 @@ if (!contains_range(p, s)) { trcVerbose("[" PTR_FORMAT " - " PTR_FORMAT "] is not a sub " "range of [" PTR_FORMAT " - " PTR_FORMAT "].", - p, p + s, addr, addr + size); + p2i(p), p2i(p + s), p2i(addr), p2i(addr + size));
pointers should be used with PTR_FORMAT. p2i(p) should be used with INTPTR_FORMAT. So the above looks like it was already correct and now
is
not correct. Using p2i with UINTX_FORMAT also looks dubious to me.
Cheers, David -----
Best regards, Matthias
-----Original Message----- From: Langer, Christoph Sent: Mittwoch, 17. Juli 2019 18:45 To: Baesken, Matthias <matthias.baesken@sap.com>; 'hotspot- dev@openjdk.java.net' <hotspot-dev@openjdk.java.net>; 'ppc-aix- port- dev@openjdk.java.net' <ppc-aix-port-dev@openjdk.java.net> Subject: RE: RFR : 8227869: fix wrong format specifiers in os_aix.cpp
Hi Matthias,
thanks for this tedious cleanup. Looks good to me.
Best regards Christoph
> -----Original Message----- > From: hotspot-dev <hotspot-dev-bounces@openjdk.java.net> On Behalf Of > Baesken, Matthias > Sent: Mittwoch, 17. Juli 2019 17:07 > To: 'hotspot-dev@openjdk.java.net' <hotspot- dev@openjdk.java.net>; > 'ppc-aix-port-dev@openjdk.java.net' <ppc-aix-port- dev@openjdk.java.net> > Subject: RFR : 8227869: fix wrong format specifiers in os_aix.cpp > > Hello, there are a couple of non matching format specifiers in os_aix.cpp . > I adjust them with my change . > > Please review ! > > Bug/webrev : > > https://bugs.openjdk.java.net/browse/JDK-8227869 > > http://cr.openjdk.java.net/~mbaesken/webrevs/8227869.0/ > > Thanks, Matthias