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perf symbols: Fill in pgoff in mmap synthesized events
When we synthesize mmap events we need to fill in the pgoff field. I wasn't able to test this completely since I couldn't find an executable region with a non 0 offset. We will see it when we start doing data profiling. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: David Miller <davem@davemloft.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <20100403115331.GK5594@kryten> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -130,6 +130,7 @@ static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
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continue;
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pbf += n + 3;
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if (*pbf == 'x') { /* vm_exec */
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u64 vm_pgoff;
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char *execname = strchr(bf, '/');
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/* Catch VDSO */
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@ -139,6 +140,14 @@ static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
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if (execname == NULL)
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continue;
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pbf += 3;
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n = hex2u64(pbf, &vm_pgoff);
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/* pgoff is in bytes, not pages */
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if (n >= 0)
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ev.mmap.pgoff = vm_pgoff << getpagesize();
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else
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ev.mmap.pgoff = 0;
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size = strlen(execname);
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execname[size - 1] = '\0'; /* Remove \n */
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memcpy(ev.mmap.filename, execname, size);
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