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[PATCH -tip 1/2] [BUGFIX] perf probe: Fix to make offset to signed value
- From: Masami Hiramatsu <mhiramat at redhat dot com>
- To: Ingo Molnar <mingo at elte dot hu>, lkml<linux-kernel at vger dot kernel dot org>
- Cc: systemtap<systemtap at sources dot redhat dot com>, DLE<dle-develop at lists dot sourceforge dot net>, Masami Hiramatsu <mhiramat at redhat dot com>, Ingo Molnar <mingo at elte dot hu>
- Date: Mon, 15 Mar 2010 13:02:28 -0400
- Subject: [PATCH -tip 1/2] [BUGFIX] perf probe: Fix to make offset to signed value
Fix to make dereference offset intmax_t from uintmax_t, because
it can be minus value (e.g. local variable's offset from frame
pointer).
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-finder.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index f9cbbf1..0e8c8f1 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -333,8 +333,8 @@ static void show_location(Dwarf_Op *op, struct probe_finder *pf)
die("%u exceeds max register number.", regn);
if (deref)
- ret = snprintf(pf->buf, pf->len, " %s=+%ju(%s)",
- pf->var, (uintmax_t)offs, regs);
+ ret = snprintf(pf->buf, pf->len, " %s=%+jd(%s)",
+ pf->var, (intmax_t)offs, regs);
else
ret = snprintf(pf->buf, pf->len, " %s=%s", pf->var, regs);
DIE_IF(ret < 0);
--
Masami Hiramatsu
e-mail: mhiramat@redhat.com