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[Libunwind-devel] [PATCH 3/5] MiniDebugInfo test: tests/run-coredump-unw
From: |
Martin Milata |
Subject: |
[Libunwind-devel] [PATCH 3/5] MiniDebugInfo test: tests/run-coredump-unwind-mdi |
Date: |
Fri, 10 Aug 2012 16:03:55 +0200 |
Test that creates MiniDebugInfo-containing binary and then checks if it
can recover the procedure names from its coredump.
Signed-off-by: Martin Milata <address@hidden>
---
tests/Makefile.am | 7 ++++++-
tests/run-coredump-unwind | 39 ++++++++++++++++++++++++++++++++++++++-
tests/run-coredump-unwind-mdi | 8 ++++++++
tests/test-coredump-unwind.c | 2 +-
4 files changed, 53 insertions(+), 3 deletions(-)
create mode 100755 tests/run-coredump-unwind-mdi
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 9dd9a76..40f3185 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -2,7 +2,8 @@ AM_CPPFLAGS = -I$(top_srcdir)/include
EXTRA_DIST = run-ia64-test-dyn1 run-ptrace-mapper run-ptrace-misc \
run-check-namespace run-coredump-unwind \
- check-namespace.sh.in Gtest-nomalloc.c Gtest-nocalloc.c
+ run-coredump-unwind-mdi check-namespace.sh.in \
+ Gtest-nomalloc.c Gtest-nocalloc.c
MAINTAINERCLEANFILES = Makefile.in
@@ -60,6 +61,10 @@ endif
if OS_LINUX
check_SCRIPTS_cdep += run-coredump-unwind
noinst_PROGRAMS_cdep += test-coredump-unwind
+
+if HAVE_LZMA
+ check_SCRIPTS_cdep += run-coredump-unwind-mdi
+endif
endif
perf: perf-startup Gperf-simple Lperf-simple Lperf-trace
diff --git a/tests/run-coredump-unwind b/tests/run-coredump-unwind
index d6dd7e0..8d07742 100755
--- a/tests/run-coredump-unwind
+++ b/tests/run-coredump-unwind
@@ -1,14 +1,51 @@
#!/bin/sh
+# this function is slight modification of the one used in RPM
+# found at https://bugzilla.redhat.com/show_bug.cgi?id=834073
+# written by Alexander Larsson <address@hidden>
+add_minidebug()
+{
+ debuginfo="$1" ## we don't have separate debuginfo file
+ binary="$1"
+
+ dynsyms=`mktemp`
+ funcsyms=`mktemp`
+ keep_symbols=`mktemp`
+ mini_debuginfo=`mktemp`
+
+ # Extract the dynamic symbols from the main binary, there is no need to also
have these
+ # in the normal symbol table
+ nm -D "$binary" --format=posix --defined-only | awk '{ print $1 }' | sort >
"$dynsyms"
+ # Extract all the text (i.e. function) symbols from the debuginfo
+ nm "$debuginfo" --format=posix --defined-only | awk '{ if ($2 == "T" || $2
== "t") print $1 }' | sort > "$funcsyms"
+ # Keep all the function symbols not already in the dynamic symbol table
+ comm -13 "$dynsyms" "$funcsyms" > "$keep_symbols"
+ # Copy the full debuginfo, keeping only a minumal set of symbols and
removing some unnecessary sections
+ objcopy -S --remove-section .gdb_index --remove-section .comment
--keep-symbols="$keep_symbols" "$debuginfo" "$mini_debuginfo" &> /dev/null
+ #Inject the compressed data into the .gnu_debugdata section of the original
binary
+ xz "$mini_debuginfo"
+ mini_debuginfo="${mini_debuginfo}.xz"
+ objcopy --add-section .gnu_debugdata="$mini_debuginfo" "$binary"
+ rm -f "$dynsyms" "$funcsyms" "$keep_symbols" "$mini_debuginfo"
+
+ strip "$binary" ## throw away the symbol table
+}
+
+
TESTDIR=`pwd`
TEMPDIR=`mktemp --tmpdir -d libunwind-test-XXXXXXXXXX`
trap "rm -r -- $TEMPDIR" EXIT
+cp crasher $TEMPDIR/crasher
+if [ "$1" = "-minidebuginfo" ]; then
+ add_minidebug $TEMPDIR/crasher
+fi
+
# create core dump
(
cd $TEMPDIR
ulimit -c 10000
- $TESTDIR/crasher $TEMPDIR/backing_files
+ ./crasher backing_files
) 2>/dev/null
COREFILE=$TEMPDIR/core*
diff --git a/tests/run-coredump-unwind-mdi b/tests/run-coredump-unwind-mdi
new file mode 100755
index 0000000..6b7f0c1
--- /dev/null
+++ b/tests/run-coredump-unwind-mdi
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# This test intends to test the unw_get_proc_name function on binaries without
+# the symbol table but with so called MiniDebuginfo available. In particular,
+# it is tested using the coredump accessors. For more info about MiniDebugInfo
+# see e.g. http://fedoraproject.org/wiki/Features/MiniDebugInfo
+
+./run-coredump-unwind -minidebuginfo
diff --git a/tests/test-coredump-unwind.c b/tests/test-coredump-unwind.c
index 2b2d4b9..6e62b8d 100644
--- a/tests/test-coredump-unwind.c
+++ b/tests/test-coredump-unwind.c
@@ -269,7 +269,7 @@ main(int argc, char **argv)
int ret;
#define TEST_FRAMES 4
-#define TEST_NAME_LEN 16
+#define TEST_NAME_LEN 32
int testcase = 0;
int test_cur = 0;
long test_start_ips[TEST_FRAMES];
--
1.7.7.6
[Libunwind-devel] [PATCH 3/5] MiniDebugInfo test: tests/run-coredump-unwind-mdi,
Martin Milata <=
[Libunwind-devel] [PATCH 4/5] Refactor parts of elfxx.c to allow reusing code, Martin Milata, 2012/08/10