src/java.base/unix/native/libjli/java_md_solinux.c

@  rev 16986 : imported patch alpinefixes-launcherfix
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*** 239,248 ****
--- 239,281 ----
      char jpath[PATH_MAX + 1];
      char *llp;
      char *dmllp = NULL;
      char *p; /* a utility pointer */
  
+ #ifdef __linux
+ #ifndef CLIB
+ #error "CLIB not set"
+ #endif
+ 
+     if (strcmp(CLIB, "musl") == 0) {
+       /*
+        * The musl library loader requires LD_LIBRARY_PATH to be set in
+        * order to correctly resolve the dependency libjava.so has on libjvm.so.
+        *
+        * Specifically, it differs from glibc in the sense that even if
+        * libjvm.so has already been loaded it will not be considered a
+        * candidate for resolving the dependency unless the *full* path
+        * of the already loaded library matches the dependency being loaded.
+        *
+        * libjvm.so is being loaded by the launcher using a long path to
+        * dlopen, not just the basename of the library. Typically this
+        * is something like "../lib/server/libjvm.so". However, if/when
+        * libjvm.so later tries to dlopen libjava.so (which it does in
+        * order to get access to a few functions implemented in
+        * libjava.so) the musl loader will, as part of loading
+        * dependent libraries, try to load libjvm.so using only its
+        * basename "libjvm.so". Since this does not match the longer
+        * path path it was first loaded with, the already loaded
+        * library is not considered a candidate, and the loader will
+        * instead look for libjvm.so elsewhere. If it's not in
+        * LD_LIBRARY_PATH the dependency load will fail, and libjava.so
+        * will therefore fail as well.
+        */
+       return JNI_TRUE;
+     }
+ #endif
+ 
  #ifdef AIX
      /* We always have to set the LIBPATH on AIX because ld doesn't support $ORIGIN. */
      return JNI_TRUE;
  #endif