wip

Author: cataphract

.gitlab/link-tracing-extension.sh

@@ -4,10 +4,18 @@ set -e -o pipefail
 suffix="${1:-}"
 
 sed -i 's/-export-symbols .*\/ddtrace\.sym/-Wl,--retain-symbols-file=ddtrace.sym/g' "ddtrace_$(uname -m)${suffix}.ldflags"
+
+# Compile solib_bootstrap.c: the split build (--enable-ddtrace-rust-library-split) excludes
+# it from the per-PHP-version .a archives, but the final ddtrace.so still needs it as the
+# ELF entry point for ExecSolib sidecar spawning.
+SOLIB_BOOTSTRAP_OBJ=$(mktemp --suffix=.o)
+cc -c -fPIC -O2 -fvisibility=hidden -fno-stack-protector \
+   ext/solib_bootstrap.c -o "${SOLIB_BOOTSTRAP_OBJ}"
+
 pids=()
 for archive in extensions_$(uname -m)/*.a; do
   (
-    cc -shared -Wl,-whole-archive $archive -Wl,-no-whole-archive $(cat "ddtrace_$(uname -m)${suffix}.ldflags") "libddtrace_php_$(uname -m)${suffix}.a" -Wl,-soname -Wl,ddtrace.so -o ${archive%.a}.so
+    cc -shared -Wl,-whole-archive $archive "${SOLIB_BOOTSTRAP_OBJ}" -Wl,-no-whole-archive $(cat "ddtrace_$(uname -m)${suffix}.ldflags") "libddtrace_php_$(uname -m)${suffix}.a" -Wl,-e,_dd_solib_start -Wl,-soname -Wl,ddtrace.so -o ${archive%.a}.so
     objcopy --compress-debug-sections ${archive%.a}.so
     chmod +x ${archive%.a}.so
   ) &
@@ -16,3 +24,4 @@ done
 for pid in "${pids[@]}"; do
   wait $pid
 done
+rm -f "${SOLIB_BOOTSTRAP_OBJ}"