[08/30] elf: Record whether paths come from LD_LIBRARY_PATH or --library-path

Message ID 430c94a366325a79ed83392e14b1f23df648bf8c.1592836143.git.fweimer@redhat.com
State New
Headers show
Series
  • RFC: elf: glibc-hwcaps support
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Commit Message

Alejandro Colomar via Libc-alpha June 22, 2020, 3:13 p.m.
This allows more precise diagnostics.
---
 elf/dl-load.c              | 4 ++--
 elf/dl-main.h              | 5 ++++-
 elf/dl-support.c           | 2 +-
 elf/rtld.c                 | 3 +++
 sysdeps/generic/ldsodefs.h | 6 ++++--
 5 files changed, 14 insertions(+), 6 deletions(-)

-- 
2.25.4

Patch

diff --git a/elf/dl-load.c b/elf/dl-load.c
index 34d3b02a95..2339ada485 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -682,7 +682,7 @@  cache_rpath (struct link_map *l,
 
 
 void
-_dl_init_paths (const char *llp)
+_dl_init_paths (const char *llp, const char *source)
 {
   size_t idx;
   const char *strp;
@@ -820,7 +820,7 @@  _dl_init_paths (const char *llp)
 	}
 
       (void) fillin_rpath (llp_tmp, env_path_list.dirs, ":;",
-			   "LD_LIBRARY_PATH", NULL, l);
+			   source, NULL, l);
 
       if (env_path_list.dirs[0] == NULL)
 	{
diff --git a/elf/dl-main.h b/elf/dl-main.h
index 681f366871..68dd27d0d7 100644
--- a/elf/dl-main.h
+++ b/elf/dl-main.h
@@ -71,6 +71,9 @@  struct dl_main_state
   /* The library search path.  */
   const char *library_path;
 
+  /* Where library_path comes from.  LD_LIBRARY_PATH or --library.  */
+  const char *library_path_source;
+
   /* The list preloaded objects from LD_PRELOAD.  */
   const char *preloadlist;
 
@@ -91,7 +94,7 @@  struct dl_main_state
 static inline void
 call_init_paths (const struct dl_main_state *state)
 {
-  _dl_init_paths (state->library_path);
+  _dl_init_paths (state->library_path, state->library_path_source);
 }
 
 /* Print ld.so usage information and exit.  */
diff --git a/elf/dl-support.c b/elf/dl-support.c
index 7704c101c5..afbc94df54 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -323,7 +323,7 @@  _dl_non_dynamic_init (void)
 
   /* Initialize the data structures for the search paths for shared
      objects.  */
-  _dl_init_paths (getenv ("LD_LIBRARY_PATH"));
+  _dl_init_paths (getenv ("LD_LIBRARY_PATH"), "LD_LIBRARY_PATH");
 
   /* Remember the last search directory added at startup.  */
   _dl_init_all_dirs = GL(dl_all_dirs);
diff --git a/elf/rtld.c b/elf/rtld.c
index 5fe6ca969a..eac9a1e743 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -269,6 +269,7 @@  dl_main_state_init (struct dl_main_state *state)
 {
   audit_list_init (&state->audit_list);
   state->library_path = NULL;
+  state->library_path_source = NULL;
   state->preloadlist = NULL;
   state->preloadarg = NULL;
   state->mode = normal;
@@ -1181,6 +1182,7 @@  dl_main (const ElfW(Phdr) *phdr,
 		 && _dl_argc > 2)
 	  {
 	    state.library_path = _dl_argv[2];
+	    state.library_path_source = "--library_path";
 
 	    _dl_skip_args += 2;
 	    _dl_argc -= 2;
@@ -2609,6 +2611,7 @@  process_envvars (struct dl_main_state *state)
 	      && memcmp (envline, "LIBRARY_PATH", 12) == 0)
 	    {
 	      state->library_path = &envline[13];
+	      state->library_path_source = "LD_LIBRARY_PATH";
 	      break;
 	    }
 
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 42fe912f47..0f23352302 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -1034,8 +1034,10 @@  rtld_hidden_proto (_dl_debug_state)
 extern struct r_debug *_dl_debug_initialize (ElfW(Addr) ldbase, Lmid_t ns)
      attribute_hidden;
 
-/* Initialize the basic data structure for the search paths.  */
-extern void _dl_init_paths (const char *library_path) attribute_hidden;
+/* Initialize the basic data structure for the search paths.  SOURCE
+   is either "LD_LIBRARY_PATH" or "--library-path".  */
+extern void _dl_init_paths (const char *library_path, const char *source)
+  attribute_hidden;
 
 /* Gather the information needed to install the profiling tables and start
    the timers.  */