rpm/debugsubpkg.diff

Create a debuginfo package for each subpackage.

Index: build/files.c
===================================================================
--- build/files.c.orig
+++ build/files.c
@@ -21,6 +21,10 @@
 #include <rpm/rpmlog.h>
 #include <rpm/rpmbase64.h>
 
+#if HAVE_GELF_H
+#include <gelf.h>
+#endif
+
 #include "rpmio/rpmio_internal.h"	/* XXX rpmioSlurp */
 #include "misc/fts.h"
 #include "lib/cpio.h"
@@ -2097,13 +2101,237 @@ exit:
     return rc;
 }
 
+#if HAVE_GELF_H && HAVE_LIBELF
+/* Query the build-id from the ELF file NAME and store it in the newly
+   allocated *build_id array of size *build_id_size.  Returns -1 on
+   error.  */
+
+int
+getELFBuildId (const char *name,
+	       unsigned char **id, size_t *id_size)
+{
+  int fd, i;
+  Elf *elf;
+  GElf_Ehdr ehdr;
+  Elf_Data *build_id = NULL;
+  size_t build_id_offset = 0, build_id_size = 0;
+
+  /* Now query the build-id of the file and add the
+     corresponding links in the .build-id tree.
+     The following code is based on tools/debugedit.c.  */
+  fd = open (name, O_RDONLY);
+  if (fd < 0)
+    return -1;
+  elf = elf_begin (fd, ELF_C_READ_MMAP, NULL);
+  if (elf == NULL)
+    {
+      fprintf (stderr, "cannot open ELF file: %s",
+	       elf_errmsg (-1));
+      close (fd);
+      return -1;
+    }
+  if (elf_kind (elf) != ELF_K_ELF
+      || gelf_getehdr (elf, &ehdr) == NULL
+      || (ehdr.e_type != ET_DYN
+	  && ehdr.e_type != ET_EXEC
+	  && ehdr.e_type != ET_REL))
+    {
+      elf_end (elf);
+      close (fd);
+      return -1;
+    }
+  for (i = 0; i < ehdr.e_shnum; ++i)
+    {
+      Elf_Scn *s = elf_getscn (elf, i);
+      GElf_Shdr shdr;
+      Elf_Data *data;
+      Elf32_Nhdr nh;
+      Elf_Data dst =
+	{
+	  .d_version = EV_CURRENT, .d_type = ELF_T_NHDR,
+	  .d_buf = &nh, .d_size = sizeof nh
+	};
+      Elf_Data src = dst;
+
+      gelf_getshdr (s, &shdr);
+      if (shdr.sh_type != SHT_NOTE
+	  || !(shdr.sh_flags & SHF_ALLOC))
+	continue;
+
+      /* Look for a build-ID note here.  */
+      data = elf_rawdata (s, NULL);
+      src.d_buf = data->d_buf;
+      assert (sizeof (Elf32_Nhdr) == sizeof (Elf64_Nhdr));
+      while (data->d_buf + data->d_size - src.d_buf > (int) sizeof nh
+	     && elf32_xlatetom (&dst, &src, ehdr.e_ident[EI_DATA]))
+	{
+	  Elf32_Word len = sizeof nh + nh.n_namesz;
+	  len = (len + 3) & ~3;
+
+	  if (nh.n_namesz == sizeof "GNU" && nh.n_type == 3
+	      && !memcmp (src.d_buf + sizeof nh, "GNU", sizeof "GNU"))
+	    {
+	      build_id = data;
+	      build_id_offset = src.d_buf + len - data->d_buf;
+	      build_id_size = nh.n_descsz;
+	      break;
+	    }
+
+	  len += nh.n_descsz;
+	  len = (len + 3) & ~3;
+	  src.d_buf += len;
+	}
+
+      if (build_id != NULL)
+	break;
+    }
+
+  if (build_id == NULL)
+    return -1;
+
+  *id = malloc (build_id_size);
+  *id_size = build_id_size;
+  memcpy (*id, build_id->d_buf + build_id_offset, build_id_size);
+
+  elf_end (elf);
+  close (fd);
+
+  return 0;
+}
+
+
+static rpmTag copyTagsForDebug[] = {
+    RPMTAG_EPOCH,
+    RPMTAG_VERSION,
+    RPMTAG_RELEASE,
+    RPMTAG_LICENSE,
+    RPMTAG_PACKAGER,
+    RPMTAG_DISTRIBUTION,
+    RPMTAG_DISTURL,
+    RPMTAG_VENDOR,
+    RPMTAG_ICON,
+    RPMTAG_URL,
+    RPMTAG_CHANGELOGTIME,
+    RPMTAG_CHANGELOGNAME,
+    RPMTAG_CHANGELOGTEXT,
+    RPMTAG_PREFIXES,
+    RPMTAG_RHNPLATFORM,
+    RPMTAG_OS,
+    RPMTAG_DISTTAG,
+    RPMTAG_CVSID,
+    RPMTAG_ARCH,
+    0
+};
+
+static void addDebuginfoPackage(rpmSpec spec, Package pkg, char *buildroot)
+{
+    const char *a;
+
+    elf_version(EV_CURRENT);
+    a = headerGetString(pkg->header, RPMTAG_ARCH);
+    if (strcmp(a, "noarch") != 0 && strcmp(a, "src") != 0 && strcmp(a, "nosrc") != 0)
+      {
+	Package dbg;
+	rpmfi fi = pkg->cpioList;
+	char tmp[1024];
+	const char *name;
+	ARGV_t files = NULL;
+	int seen_build_id = 0;
+
+	/* Check if the current package has files with debug info
+	   and record them.  */
+	fi = rpmfiInit (fi, 0);
+	while (rpmfiNext (fi) >= 0)
+	  {
+	    const char *base;
+	    int i;
+	    unsigned char *build_id;
+	    size_t build_id_size = 0;
+	    struct stat sbuf;
+
+	    name = rpmfiFN (fi);
+	    /* Skip leading buildroot.  */
+	    base = name + strlen (buildroot);
+	    /* Pre-pend %buildroot/usr/lib/debug and append .debug.  */
+	    snprintf (tmp, 1024, "%s/usr/lib/debug%s.debug",
+		      buildroot, base);
+	    /* If that file exists we have debug information for it.  */
+	    if (access (tmp, F_OK) != 0)
+	      continue;
+
+	    /* Append the file list preamble.  */
+	    if (!files)
+	      {
+		argvAdd(&files, "%defattr(-,root,root)");
+		argvAdd(&files, "%dir /usr/lib/debug");
+	      }
+	    /* Add the files main debug-info file.  */
+	    snprintf (tmp, 1024, "/usr/lib/debug/%s.debug", base);
+	    argvAdd(&files, tmp);
+
+	    /* Do not bother to check build-ids for symbolic links.
+	       We'll handle them for the link target.  */
+	    if (lstat (name, &sbuf) == -1
+		|| S_ISLNK (sbuf.st_mode))
+	      continue;
+
+	    /* Try to gather the build-id from the binary.  */
+	    if (getELFBuildId (name, &build_id, &build_id_size) == -1)
+	      continue;
+
+	    /* If we see build-id links for the first time add the
+	       directory.  */
+	    if (!seen_build_id)
+	      argvAdd(&files, "%dir /usr/lib/debug/.build-id");
+
+	    /* From the build-id construct the two links pointing back
+	       to the debug information file and the binary.  */
+	    snprintf (tmp, 1024, "/usr/lib/debug/.build-id/%02x/",
+		      build_id[0]);
+	    for (i = 1; i < build_id_size; ++i)
+	      sprintf (tmp + strlen (tmp), "%02x", build_id[i]);
+	    argvAdd(&files, tmp);
+	    sprintf (tmp + strlen (tmp), ".debug");
+	    argvAdd(&files, tmp);
+
+	    free (build_id);
+	  }
+
+	/* If there are debuginfo files for this package add a
+	   new debuginfo package.  */
+	if (files)
+	  {
+	    dbg = newPackage (spec);
+	    headerNVR (pkg->header, &name, NULL, NULL);
+	    /* Set name, summary and group.  */
+	    snprintf (tmp, 1024, "%s-debuginfo", name);
+	    headerPutString(dbg->header, RPMTAG_NAME, tmp);
+	    snprintf (tmp, 1024, "Debug information for package %s", name);
+	    headerPutString(dbg->header, RPMTAG_SUMMARY, tmp);
+	    snprintf (tmp, 1024, "This package provides debug information for package %s.\n"
+		      "Debug information is useful when developing applications that use this\n"
+		      "package or when debugging this package.", name);
+	    headerPutString(dbg->header, RPMTAG_DESCRIPTION, tmp);
+	    headerPutString(dbg->header, RPMTAG_GROUP, "Development/Debug");
+	    /* Inherit other tags from parent.  */
+	    headerCopyTags (pkg->header, dbg->header, copyTagsForDebug);
+
+	    /* Build up the files list.  */
+	    dbg->fileList = files;
+	  }
+      }
+}
+#endif
+
 rpmRC processBinaryFiles(rpmSpec spec, rpmBuildPkgFlags pkgFlags,
 			int installSpecialDoc, int test)
 {
     Package pkg;
     rpmRC rc = RPMRC_OK;
+    char *buildroot;
     
     check_fileList = newStringBuf();
+    buildroot = rpmGenPath(spec->rootDir, spec->buildRoot, NULL);
     genSourceRpmName(spec);
     
     for (pkg = spec->packages; pkg != NULL; pkg = pkg->next) {
@@ -2119,8 +2347,12 @@ rpmRC processBinaryFiles(rpmSpec spec, r
 	rpmlog(RPMLOG_NOTICE, _("Processing files: %s\n"), nvr);
 	free(nvr);
 		   
-	if ((rc = processPackageFiles(spec, pkgFlags, pkg, installSpecialDoc, test)) != RPMRC_OK ||
-	    (rc = rpmfcGenerateDepends(spec, pkg)) != RPMRC_OK)
+	if ((rc = processPackageFiles(spec, pkgFlags, pkg, installSpecialDoc, test)) != RPMRC_OK)
+	    goto exit;
+#if HAVE_GELF_H && HAVE_LIBELF
+        addDebuginfoPackage(spec, pkg, buildroot);
+#endif
+	if ((rc = rpmfcGenerateDepends(spec, pkg)) != RPMRC_OK)
 	    goto exit;
 
 	a = headerGetString(pkg->header, RPMTAG_ARCH);
Index: macros.in
===================================================================
--- macros.in.orig
+++ macros.in
@@ -182,24 +182,10 @@
 #	Template for debug information sub-package.
 %debug_package \
 %global __debug_package 1\
-%package debuginfo\
-Summary: Debug information for package %{name}\
-Group: Development/Debug\
-AutoReq: 0\
-AutoProv: 1\
-#Requires: %{?!debug_package_requires:%{name} = %{version}-%{release}}%{?debug_package_requires}\
-%description debuginfo\
-This package provides debug information for package %{name}.\
-Debug information is useful when developing applications that use this\
-package or when debugging this package.\
-%files debuginfo -f debugfiles.list\
-%defattr(-,root,root)\
-\
 %package debugsource\
 Summary: Debug sources for package %{name}\
 Group: Development/Debug\
 AutoReqProv: 0\
-Requires: %{name}-debuginfo = %{version}-%{release}\
 %description debugsource\
 This package provides debug sources for package %{name}.\
 Debug sources are useful when developing applications that use this\
Index: scripts/find-debuginfo.sh
===================================================================
--- scripts/find-debuginfo.sh.orig
+++ scripts/find-debuginfo.sh
@@ -149,6 +149,11 @@ debug_link()
 # Provide .2, .3, ... symlinks to all filename instances of this build-id.
 make_id_dup_link()
 {
+  # See https://bugzilla.redhat.com/show_bug.cgi?id=641377 for the reasoning, 
+  # but it has seveal drawbacks as we would need to split the .1 suffixes into 
+  # different subpackages and it's about impossible to predict the number
+  # -> perhaps later
+  return
   local id="$1" file="$2" idfile
 
   local n=1
@@ -311,19 +316,11 @@ while read nlinks inum f; do
   fi
 done || exit
 
-# For each symlink whose target has a .debug file,
-# make a .debug symlink to that file.
-find "$RPM_BUILD_ROOT" ! -path "${debugdir}/*" -type l -print |
-while read f
-do
-  t=$(readlink -m "$f").debug
-  f=${f#$RPM_BUILD_ROOT}
-  t=${t#$RPM_BUILD_ROOT}
-  if [ -f "$debugdir$t" ]; then
-    echo "symlinked /usr/lib/debug$t to /usr/lib/debug${f}.debug"
-    debug_link "/usr/lib/debug$t" "${f}.debug"
-  fi
-done
+# We used to make a .debug symlink for each symlink whose target
+# has a .debug file to that file.  This is not necessary because
+# the debuglink section contains only the destination of those links.
+# Creating those links anyway results in debuginfo packages for
+# devel packages just because of the .so symlinks in them.
 
 if [ -s "$SOURCEFILE" ]; then
   mkdir -p "${RPM_BUILD_ROOT}/usr/src/debug"