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[PATCH] stack: -b, --build-id shows module build-id, load address and pc offset.
- From: Mark Wielaard <mjw at redhat dot com>
- To: elfutils-devel at lists dot fedorahosted dot org
- Date: Mon, 23 Dec 2013 11:21:52 +0100
- Subject: [PATCH] stack: -b, --build-id shows module build-id, load address and pc offset.
A convenient format for offline processing of the backtrace.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
---
src/ChangeLog | 8 ++++++++
src/stack.c | 31 +++++++++++++++++++++++++++----
2 files changed, 35 insertions(+), 4 deletions(-)
diff --git a/src/ChangeLog b/src/ChangeLog
index d3d6807..4737d69 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,11 @@
+2013-12-23 Mark Wielaard <mjw@redhat.com>
+
+ * stack.c (show_build_id): New static boolean.
+ (print_frames): Print module build-id, load address and pc offset
+ if show_build_id is true.
+ (parse_opt): Handle '-b'.
+ (main): Add -b to options.
+
2013-12-22 Mark Wielaard <mjw@redhat.com>
* stack.c (maxframes): New static unsigned. Initialize to 64.
diff --git a/src/stack.c b/src/stack.c
index 188aa00..362cc06 100644
--- a/src/stack.c
+++ b/src/stack.c
@@ -38,6 +38,7 @@ ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
static bool show_activation = false;
static bool show_module = false;
+static bool show_build_id = false;
static bool show_source = false;
static bool show_one_tid = false;
@@ -116,15 +117,31 @@ print_frames (struct frames *frames)
if (symname != NULL)
printf (" %s", symname);
+ const char* fname;
+ Dwarf_Addr start;
+ fname = dwfl_module_info(mod, NULL, &start,
+ NULL, NULL, NULL, NULL, NULL);
if (show_module)
{
- const char* fname;
- fname = dwfl_module_info(mod,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL);
if (fname != NULL)
printf (" - %s", fname);
}
+ if (show_build_id)
+ {
+ const unsigned char *id;
+ GElf_Addr id_vaddr;
+ int id_len = dwfl_module_build_id (mod, &id, &id_vaddr);
+ if (id_len > 0)
+ {
+ printf ("\n [");
+ do
+ printf ("%02" PRIx8, *id++);
+ while (--id_len > 0);
+ printf ("]@0x%0" PRIx64 "+%" PRIx64, start, pc_adjusted - start);
+ }
+ }
+
if (show_source)
{
Dwfl_Line *lineobj = dwfl_module_getsrc(mod, pc_adjusted);
@@ -203,6 +220,10 @@ parse_opt (int key, char *arg __attribute__ ((unused)),
show_activation = show_source = show_module = true;
break;
+ case 'b':
+ show_build_id = true;
+ break;
+
case '1':
show_one_tid = true;
break;
@@ -243,6 +264,8 @@ main (int argc, char **argv)
N_("Additionally show source file information"), 0 },
{ "verbose", 'v', NULL, 0,
N_("Show all additional information (activation, module and source)"), 0 },
+ { "build-id", 'b', NULL, 0,
+ N_("Show module build-id, load address and pc offset"), 0 },
{ NULL, '1', NULL, 0,
N_("Show the backtrace of only one thread"), 0 },
{ NULL, 'n', "MAXFRAMES", 0,
@@ -270,7 +293,7 @@ Only real user processes are supported, no kernel or process maps."),
argp_parse (&argp, argc, argv, 0, &remaining, &dwfl);
assert (dwfl != NULL);
if (remaining != argc)
- error (2, 0, "eu-stack [-a] [-m] [-s] [-v] [-1] [-n MAXFRAMES]"
+ error (2, 0, "eu-stack [-a] [-m] [-b] [-s] [-v] [-1] [-n MAXFRAMES]"
" [--debuginfo-path=<path>]"
" {-p <process id>|--core=<file> [--executable=<file>]|--help}");
--
1.7.1