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perf probe: Fix offset to allow signed value 

Fix dereference offset to intmax_t from uintmax_t, because
it can have negative values (for example local variable's offset
from frame pointer).

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
LKML-Reference: <20100315170228.31852.71946.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Masami Hiramatsu 2010-03-15 13:02:28 -04:00 committed by Ingo Molnar
parent b63be8d7be
commit 67c7ff7c56
1 changed files with 2 additions and 2 deletions
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4
tools/perf/util/probe-finder.c
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@ -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);