sync libbacktrace from gcc

libbacktrace/ChangeLog

@@ -1,3 +1,20 @@
+2021-11-12  Martin Liska  <mliska@suse.cz>
+
+	PR libbacktrace/103167
+	* elf.c (elf_uncompress_lzma_block): Cast to unsigned int.
+	(elf_uncompress_lzma): Likewise.
+	* xztest.c (test_samples): memcpy only if v > 0.
+
+2021-10-22  Martin Liska  <mliska@suse.cz>
+
+	PR testsuite/102742
+	* btest.c (MIN_DESCRIPTOR): New.
+	(MAX_DESCRIPTOR): Likewise.
+	(check_available_files): Likewise.
+	(check_open_files): Check only file descriptors that
+	were not available at the entry.
+	(main): Call check_available_files.
+
 2021-08-13  Sergei Trofimovich  <siarheit@google.com>
 
 	* install-debuginfo-for-buildid.sh.in: Force non-localized readelf

libbacktrace/btest.c

@@ -38,6 +38,7 @@ POSSIBILITY OF SUCH DAMAGE.  */
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <sys/stat.h>
 
 #include "filenames.h"
 
@@ -458,16 +459,29 @@ test5 (void)
   return failures;
 }
 
+#define MIN_DESCRIPTOR 3
+#define MAX_DESCRIPTOR 10
+
+static int fstat_status[MAX_DESCRIPTOR];
+
+/* Check files that are available.  */
+
+static void
+check_available_files (void)
+{
+  struct stat s;
+  for (unsigned i = MIN_DESCRIPTOR; i < MAX_DESCRIPTOR; i++)
+    fstat_status[i] = fstat (i, &s);
+}
+
 /* Check that are no files left open.  */
 
 static void
 check_open_files (void)
 {
-  int i;
+  for (unsigned i = MIN_DESCRIPTOR; i < MAX_DESCRIPTOR; i++)
-
-  for (i = 3; i < 10; i++)
     {
-      if (close (i) == 0)
+      if (fstat_status[i] != 0 && close (i) == 0)
 	{
 	  fprintf (stderr,
 		   "ERROR: descriptor %d still open after tests complete\n",
@@ -482,6 +496,8 @@ check_open_files (void)
 int
 main (int argc ATTRIBUTE_UNUSED, char **argv)
 {
+  check_available_files ();
+
   state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
 				  error_callback_create, NULL);
 

libbacktrace/elf.c

@@ -3172,10 +3172,10 @@ elf_uncompress_lzma_block (const unsigned char *compressed,
   /* Block header CRC.  */
   computed_crc = elf_crc32 (0, compressed + block_header_offset,
 			    block_header_size - 4);
-  stream_crc = (compressed[off]
+  stream_crc = ((uint32_t)compressed[off]
-		| (compressed[off + 1] << 8)
+		| ((uint32_t)compressed[off + 1] << 8)
-		| (compressed[off + 2] << 16)
+		| ((uint32_t)compressed[off + 2] << 16)
-		| (compressed[off + 3] << 24));
+		| ((uint32_t)compressed[off + 3] << 24));
   if (unlikely (computed_crc != stream_crc))
     {
       elf_uncompress_failed ();
@@ -3785,10 +3785,10 @@ elf_uncompress_lzma (struct backtrace_state *state,
 
   /* Next comes a CRC of the stream flags.  */
   computed_crc = elf_crc32 (0, compressed + 6, 2);
-  stream_crc = (compressed[8]
+  stream_crc = ((uint32_t)compressed[8]
-		| (compressed[9] << 8)
+		| ((uint32_t)compressed[9] << 8)
-		| (compressed[10] << 16)
+		| ((uint32_t)compressed[10] << 16)
-		| (compressed[11] << 24));
+		| ((uint32_t)compressed[11] << 24));
   if (unlikely (computed_crc != stream_crc))
     {
       elf_uncompress_failed ();
@@ -3829,10 +3829,10 @@ elf_uncompress_lzma (struct backtrace_state *state,
 
   /* Before that is a footer CRC.  */
   computed_crc = elf_crc32 (0, compressed + offset, 6);
-  stream_crc = (compressed[offset - 4]
+  stream_crc = ((uint32_t)compressed[offset - 4]
-		| (compressed[offset - 3] << 8)
+		| ((uint32_t)compressed[offset - 3] << 8)
-		| (compressed[offset - 2] << 16)
+		| ((uint32_t)compressed[offset - 2] << 16)
-		| (compressed[offset - 1] << 24));
+		| ((uint32_t)compressed[offset - 1] << 24));
   if (unlikely (computed_crc != stream_crc))
     {
       elf_uncompress_failed ();
@@ -3888,10 +3888,10 @@ elf_uncompress_lzma (struct backtrace_state *state,
   /* Next is a CRC of the index.  */
   computed_crc = elf_crc32 (0, compressed + index_offset,
 			    offset - index_offset);
-  stream_crc = (compressed[offset]
+  stream_crc = ((uint32_t)compressed[offset]
-		| (compressed[offset + 1] << 8)
+		| ((uint32_t)compressed[offset + 1] << 8)
-		| (compressed[offset + 2] << 16)
+		| ((uint32_t)compressed[offset + 2] << 16)
-		| (compressed[offset + 3] << 24));
+		| ((uint32_t)compressed[offset + 3] << 24));
   if (unlikely (computed_crc != stream_crc))
     {
       elf_uncompress_failed ();

libbacktrace/xztest.c

@@ -172,7 +172,7 @@ test_samples (struct backtrace_state *state)
 		       tests[i].name, uncompressed_len, v);
 	      ++failures;
 	    }
-	  else if (memcmp (tests[i].uncompressed, uncompressed, v) != 0)
+	  else if (v > 0 && memcmp (tests[i].uncompressed, uncompressed, v) != 0)
 	    {
 	      size_t j;