[PATCH] find-debuginfo.sh: Exit with real exit status in parallel jobs

[Keith Seitz <keiths@redhat.com>]

Currently, when the script is executed in parallel (-jN), the
resulting exit status will always be 0.

The script execs an appropriate number of clones of itself, calling
run_job to run the actual workload. This then calls do_file(), saving
the exit status into "res.$jobid".

In do_file(), though, if an error occurs, exit is called. This causes
the entire exec'd shell to exit with status 0 (since there are almost
always echo calls as the last executed statement). The real exit
status is therefor never written to the "res.$jobid" files by run_job().

The simple solution is to use 'return' instead of 'exit'. A number
of minor adjustments are also made to propagate this properly so that
it is reported as the correct exit status.

While at it, I've incorporated a patch for find-debuginfo/30505.
Using this patch and another patch to the RPM package (submitted as
github issue #3215), failures of gdb-add-index.sh will now properly fail
the build instead of being swallowed. It should be much easier for
developers to figure out why their builds have failed should gdb crash.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30505
Signed-off-by: Keith Seitz <keiths@redhat.com>
---
 scripts/find-debuginfo.in | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/scripts/find-debuginfo.in b/scripts/find-debuginfo.in
index ae0818f..f40e566 100755
--- a/scripts/find-debuginfo.in
+++ b/scripts/find-debuginfo.in
@@ -477,16 +477,20 @@ do_file()
 			      -l "$SOURCEFILE" "$f") || exit
   if [ -z "$id" ]; then
     echo >&2 "*** ${strict_error}: No build ID note found in $f"
-    $strict && exit 2
+    $strict && return 2
   fi
 
   # Add .gdb_index if requested.
   if $include_gdb_index; then
     if type gdb-add-index >/dev/null 2>&1; then
-      gdb-add-index "$f"
+      gdb-add-index "$f" || {
+        status=$?
+        echo >&2 "*** ERROR:: GDB exited with exit status $status during index generation"
+        return 2
+      }
     else
       echo >&2 "*** ERROR: GDB index requested, but no gdb-add-index installed"
-      exit 2
+      return 2
     fi
   fi
 
@@ -547,6 +551,7 @@ run_job()
 {
   local jobid=$1 filenum
   local SOURCEFILE=$temp/debugsources.$jobid ELFBINSFILE=$temp/elfbins.$jobid
+  local res=0
 
   >"$SOURCEFILE"
   >"$ELFBINSFILE"
@@ -558,8 +563,12 @@ run_job()
       break
     fi
     do_file $(sed -n "$(( 0x$filenum )) p" "$temp/primary")
+    res=$?
+    if [ $res != 0 ]; then
+	break
+    fi
   done
-  echo 0 >"$temp/res.$jobid"
+  echo $res >"$temp/res.$jobid"
 }
 
 n_files=$(wc -l <"$temp/primary")
@@ -587,7 +596,7 @@ else
     test -f "$f" || continue
     res=$(< "$f")
     if [ "$res" !=  "0" ]; then
-      exit 1
+      exit $res
     fi
   done
   # List of sources may have lots of duplicates. A kernel build was seen

base-commit: 630644cd7ce3ee068f5c105ad42adaa5a6f21287
-- 
2.45.2