From 8682814b04c131bef9167bffd9f5753b455239f3 Mon Sep 17 00:00:00 2001
From: Vitaly Chikunov <vt@altlinux.org>
Date: Sun, 23 Aug 2020 00:00:21 +0300
Subject: [PATCH] debuginfo: Try to uncompress if debugedit failed to extract
 sources list

If debugedit failed to extract sources list, uncompress and try again.
Then compress back.

ps. Interesting relevant reading:
  https://blogs.oracle.com/solaris/elf_section_compression-v2

Spelling suggestions by Dmitry V. Levin <ldv@altlinux.org>.
---
 scripts/process-debuginfo.in | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/scripts/process-debuginfo.in b/scripts/process-debuginfo.in
index 1d35a44..1e4a2a6 100755
--- a/scripts/process-debuginfo.in
+++ b/scripts/process-debuginfo.in
@@ -60,6 +60,25 @@ done
 
 timestamp=$(date --iso-8601=ns --reference="$f")
 @RPMCONFIGDIR@/debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug -l .tmp/src.$$ "$f"
+if [ ! -s .tmp/src.$$ ]; then
+	# debugedit has failed to extract sources list, possibly
+	# due to ELF compression - uncompress and try again.
+	LD_ORIGIN_PATH=/usr/bin eu-readelf -S "$f" > .tmp/sections.$$
+	if grep -q ' \.debug_info .* PROGBITS .*C' .tmp/sections.$$; then
+		# Have SHF_COMPRESSED flag.
+		zmode=zlib-gabi
+	elif grep -q ' \.zdebug_info .* PROGBITS ' .tmp/sections.$$; then
+		zmode=zlib-gnu
+	else
+		zmode=
+	fi
+	rm .tmp/sections.$$
+	if [ -n "$zmode" ]; then
+		LD_ORIGIN_PATH=/usr/bin eu-elfcompress --type=none "$f"
+		@RPMCONFIGDIR@/debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug -l .tmp/src.$$ "$f"
+		LD_ORIGIN_PATH=/usr/bin eu-elfcompress --type=$zmode "$f"
+	fi
+fi
 if [ -n "$strip" ]; then
 	mkdir -p "${debugf%/*}"
 	LD_ORIGIN_PATH=/usr/bin eu-strip $strip --remove-comment -f "$debugf" "$f"