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authorMasami Hiramatsu <mhiramat@redhat.com>2010-05-10 13:12:07 -0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-05-17 22:13:51 -0300
commit7752f1b096e13991f20b59fd11ba73da3809d93c (patch)
tree9a30ef1d2a8f665bc0d1d00d2011e5036b21ef73
parent94f3ca95787ada3d64339a4ecb2754236ab563f6 (diff)
downloadlinux-2.6.34-ux500-7752f1b096e13991f20b59fd11ba73da3809d93c.tar.gz
perf probe: Don't compile CFI related code if elfutils is old
Check elfutils version, and if it is old don't compile CFI analysis code. This allows to compile perf with old elfutils. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Tested-by: Stephane Eranian <eranian@google.com> Reported-by: Robert Richter <robert.richter@amd.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20100510171207.26029.97604.stgit@localhost6.localdomain6> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/probe-finder.c4
-rw-r--r--tools/perf/util/probe-finder.h3
2 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 562b1443e78..93583eb19cd 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -668,6 +668,7 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf)
ret = dwarf_getlocation_addr(&fb_attr, pf->addr, &pf->fb_ops, &nops, 1);
if (ret <= 0 || nops == 0) {
pf->fb_ops = NULL;
+#if _ELFUTILS_PREREQ(0, 142)
} else if (nops == 1 && pf->fb_ops[0].atom == DW_OP_call_frame_cfa &&
pf->cfi != NULL) {
Dwarf_Frame *frame;
@@ -677,6 +678,7 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf)
(uintmax_t)pf->addr);
return -ENOENT;
}
+#endif
}
/* Find each argument */
@@ -956,8 +958,10 @@ int find_kprobe_trace_events(int fd, struct perf_probe_event *pev,
return -EBADF;
}
+#if _ELFUTILS_PREREQ(0, 142)
/* Get the call frame information from this dwarf */
pf.cfi = dwarf_getcfi(dbg);
+#endif
off = 0;
line_list__init(&pf.lcache);
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 66f1980e385..e1f61dcd18f 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -29,6 +29,7 @@ extern int find_line_range(int fd, struct line_range *lr);
#include <dwarf.h>
#include <libdw.h>
+#include <version.h>
struct probe_finder {
struct perf_probe_event *pev; /* Target probe event */
@@ -44,7 +45,9 @@ struct probe_finder {
struct list_head lcache; /* Line cache for lazy match */
/* For variable searching */
+#if _ELFUTILS_PREREQ(0, 142)
Dwarf_CFI *cfi; /* Call Frame Information */
+#endif
Dwarf_Op *fb_ops; /* Frame base attribute */
struct perf_probe_arg *pvar; /* Current target variable */
struct kprobe_trace_arg *tvar; /* Current result variable */