* DTRACE_PROBE macro fails to compile with Clang++
@ 2013-09-11 17:32 Martin Martin
2013-09-11 17:38 ` Daniel P. Berrange
0 siblings, 1 reply; 3+ messages in thread
From: Martin Martin @ 2013-09-11 17:32 UTC (permalink / raw)
To: systemtap
The following code:
#include <sys/sdt.h>
int main() {
DTRACE_PROBE(a, b);
}
compiles with with G++, but when compiled with clang++ 3.3 gives:
clang++ dtrace_probe.cpp
dtrace_probe.cpp:4:5: error: unknown flag
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:36:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BODY(provider, name, _SDT_ASM_ARGS, (n)) \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:43:31: note: expanded from macro '_SDT_ASM_3'
# define _SDT_ASM_3(a, b, c) _SDT_S(a) "," _SDT_S(b) "," \
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:9:2: note: expanded from here
".pushsection .note.stapsdt"
^
<inline asm>:2:31: note: instantiated into assembly here
.pushsection .note.stapsdt,"?","note"
^
dtrace_probe.cpp:4:5: error: .popsection without corresponding .pushsection
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:36:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BODY(provider, name, _SDT_ASM_ARGS, (n)) \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:41:26: note: expanded from macro '_SDT_ASM_1'
# define _SDT_ASM_1(x) _SDT_S(x) "\n"
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:29:2: note: expanded from here
".popsection"
^
<inline asm>:14:12: note: instantiated into assembly here
.popsection
^
dtrace_probe.cpp:4:5: error: expected '@' or '%' before type
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:38:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BASE); \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:45:36: note: expanded from macro '_SDT_ASM_5'
# define _SDT_ASM_5(a, b, c, d, e) _SDT_S(a) "," _SDT_S(b) "," \
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:32:2: note: expanded from here
".pushsection .stapsdt.base"
^
<inline asm>:2:33: note: instantiated into assembly here
.pushsection .stapsdt.base,"aG","progbits",.stapsdt.base,comdat
^
dtrace_probe.cpp:4:5: error: .popsection without corresponding .pushsection
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:38:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BASE); \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:41:26: note: expanded from macro '_SDT_ASM_1'
# define _SDT_ASM_1(x) _SDT_S(x) "\n"
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:42:2: note: expanded from here
".popsection"
^
<inline asm>:7:12: note: instantiated into assembly here
.popsection
^
4 errors generated.
$ clang++ --version
clang version 3.3 (tags/RELEASE_33/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: DTRACE_PROBE macro fails to compile with Clang++
2013-09-11 17:32 DTRACE_PROBE macro fails to compile with Clang++ Martin Martin
@ 2013-09-11 17:38 ` Daniel P. Berrange
2013-09-11 17:45 ` Mark Wielaard
0 siblings, 1 reply; 3+ messages in thread
From: Daniel P. Berrange @ 2013-09-11 17:38 UTC (permalink / raw)
To: Martin Martin; +Cc: systemtap
On Wed, Sep 11, 2013 at 01:32:15PM -0400, Martin Martin wrote:
> The following code:
>
> #include <sys/sdt.h>
>
> int main() {
> DTRACE_PROBE(a, b);
> }
>
> compiles with with G++, but when compiled with clang++ 3.3 gives:
That's a known issue - there's some info (but no solution yet ) in this
bug report too:
https://bugzilla.redhat.com/show_bug.cgi?id=999419
Daniel
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: DTRACE_PROBE macro fails to compile with Clang++
2013-09-11 17:38 ` Daniel P. Berrange
@ 2013-09-11 17:45 ` Mark Wielaard
0 siblings, 0 replies; 3+ messages in thread
From: Mark Wielaard @ 2013-09-11 17:45 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: Martin Martin, systemtap
On Wed, 2013-09-11 at 18:38 +0100, Daniel P. Berrange wrote:
> On Wed, Sep 11, 2013 at 01:32:15PM -0400, Martin Martin wrote:
> > The following code:
> >
> > #include <sys/sdt.h>
> >
> > int main() {
> > DTRACE_PROBE(a, b);
> > }
> >
> > compiles with with G++, but when compiled with clang++ 3.3 gives:
>
> That's a known issue - there's some info (but no solution yet ) in this
> bug report too:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=999419
Yeah, seems to be some unknown deficiency in clang (plus mixing two
system compilers on one system doesn't seem to be a good idea - the open
question seems to be whether clang can be configured to use the normal
gas assembler). See also
https://sourceware.org/bugzilla/show_bug.cgi?id=13974
Cheers,
Mark
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-09-11 17:32 DTRACE_PROBE macro fails to compile with Clang++ Martin Martin
2013-09-11 17:38 ` Daniel P. Berrange
2013-09-11 17:45 ` Mark Wielaard
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