base/SOURCES/gdb-rhbz1225569-oom-killer-aarch64-frame-same-id-7of8.patch

commit 1b5d0ab34c53d6e896d2c0958b1176e324bb7878
Author: Pedro Alves <palves@redhat.com>
Date:   Wed Jul 16 19:25:41 2014 +0100

    gdb.trace/tfile.c: Remove Thumb bit in one more more, general cleanup
    
    I noticed that the existing code casts a function's address to 'long',
    but that doesn't work correctly on some ABIs, like Win64, where long
    is 32-bit and while pointers are 64-bit:
    
      func_addr = (long) &write_basic_trace_file;
    
    Fixing that showed there's actually another place in the file that
    writes a function address to file, and therefore should clear the
    Thumb bit.  This commit adds a macro+function pair to centralize the
    Thumb bit handling, and uses it in both places.
    
    The rest is just enough changes to make the file build without
    warnings with "-Wall -Wextra" with x86_64-w64-mingw32-gcc and
    i686-w64-mingw32-gcc cross compilers, and with -m32/-m64 on x86_64
    GNU/Linux.  Currently with x86_64-w64-mingw32-gcc we get:
    
      $ x86_64-w64-mingw32-gcc tfile.c  -Wall -DTFILE_DIR=\"\"
      tfile.c: In function 'start_trace_file':
      tfile.c:51:23: error: 'S_IRGRP' undeclared (first use in this function)
    	 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
    			 ^
      tfile.c:51:23: note: each undeclared identifier is reported only once for each function it appears in
      tfile.c:51:31: error: 'S_IROTH' undeclared (first use in this function)
    	 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
    				 ^
      tfile.c: In function 'add_memory_block':
      tfile.c:79:10: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
         ll_x = (unsigned long) addr;
    	    ^
      tfile.c: In function 'write_basic_trace_file':
      tfile.c:113:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
         func_addr = (long) &write_basic_trace_file;
    		 ^
      tfile.c:137:3: warning: passing argument 1 of 'add_memory_block' from incompatible pointer type [enabled by default]
         add_memory_block (&testglob, sizeof (testglob));
         ^
      tfile.c:72:1: note: expected 'char *' but argument is of type 'int *'
       add_memory_block (char *addr, int size)
       ^
      tfile.c:139:3: warning: passing argument 1 of 'add_memory_block' from incompatible pointer type [enabled by default]
         add_memory_block (&testglob2, 1);
         ^
      tfile.c:72:1: note: expected 'char *' but argument is of type 'int *'
       add_memory_block (char *addr, int size)
       ^
      tfile.c: In function 'write_error_trace_file':
      tfile.c:185:3: warning: implicit declaration of function 'alloca' [-Wimplicit-function-declaration]
         char *hex = alloca (len * 2 + 1);
         ^
      tfile.c:185:15: warning: incompatible implicit declaration of built-in function 'alloca' [enabled by default]
         char *hex = alloca (len * 2 + 1);
    		 ^
      tfile.c:211:6: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    	(long) &write_basic_trace_file);
          ^
    
    Tested on x86_64 Fedora 20, -m64 and -m32.
    Tested by Yao on arm targets.
    
    gdb/testsuite/
    2014-07-16  Pedro Alves  <palves@redhat.com>
    
    	* gdb.trace/tfile.c: Include unistd.h and stdint.h.
    	(start_trace_file): Guard S_IRGRP and S_IROTH uses behind #ifdef.
    	(tfile_write_64, tfile_write_16, tfile_write_8, tfile_write_addr)
    	(tfile_write_buf): New functions.
    	(add_memory_block): Rewrite using the above.
    	(adjust_function_address): New function.
    	(FUNCTION_ADDRESS): New macro.
    	(write_basic_trace_file): Remove short_x local, and use
    	tfile_write_16. Change type of func_addr local to unsigned long
    	long.  Use FUNCTION_ADDRESS instead of handling the Thumb bit
    	here.  Cast argument of add_memory_block to char pointer.
    	(write_error_trace_file): Avoid alloca.  Use FUNCTION_ADDRESS.
    	(main): Remove parameters.
    	* gdb.trace/tfile.exp: Remove nowarnings.

Index: gdb-7.6.1/gdb/testsuite/gdb.trace/tfile.c
===================================================================
--- gdb-7.6.1.orig/gdb/testsuite/gdb.trace/tfile.c
+++ gdb-7.6.1/gdb/testsuite/gdb.trace/tfile.c
@@ -3,9 +3,11 @@
    GDB.  */
 
 #include <stdio.h>
+#include <unistd.h>
 #include <string.h>
 #include <fcntl.h>
 #include <sys/stat.h>
+#include <stdint.h>
 
 char spbuf[200];
 
@@ -23,9 +25,17 @@ int
 start_trace_file (char *filename)
 {
   int fd;
+  mode_t mode = S_IRUSR | S_IWUSR;
 
-  fd = open (filename, O_WRONLY|O_CREAT|O_APPEND,
-	     S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+#ifdef S_IRGRP
+  mode |= S_IRGRP;
+#endif
+
+#ifdef S_IROTH
+  mode |= S_IROTH;
+#endif
+
+  fd = open (filename, O_WRONLY|O_CREAT|O_APPEND, mode);
 
   if (fd < 0)
     return fd;
@@ -44,31 +54,73 @@ finish_trace_file (int fd)
   close (fd);
 }
 
+static void
+tfile_write_64 (uint64_t value)
+{
+  memcpy (trptr, &value, sizeof (uint64_t));
+  trptr += sizeof (uint64_t);
+}
 
-void
-add_memory_block (char *addr, int size)
+static void
+tfile_write_16 (uint16_t value)
+{
+  memcpy (trptr, &value, sizeof (uint16_t));
+  trptr += sizeof (uint16_t);
+}
+
+static void
+tfile_write_8 (uint8_t value)
 {
-  short short_x;
-  unsigned long long ll_x;
+  memcpy (trptr, &value, sizeof (uint8_t));
+  trptr += sizeof (uint8_t);
+}
 
-  *((char *) trptr) = 'M';
-  trptr += 1;
-  ll_x = (unsigned long) addr;
-  memcpy (trptr, &ll_x, sizeof (unsigned long long));
-  trptr += sizeof (unsigned long long);
-  short_x = size;
-  memcpy (trptr, &short_x, 2);
-  trptr += 2;
+static void
+tfile_write_addr (char *addr)
+{
+  tfile_write_64 ((uint64_t) (uintptr_t) addr);
+}
+
+static void
+tfile_write_buf (const void *addr, size_t size)
+{
   memcpy (trptr, addr, size);
   trptr += size;
 }
 
 void
+add_memory_block (char *addr, int size)
+{
+  tfile_write_8 ('M');
+  tfile_write_addr (addr);
+  tfile_write_16 (size);
+  tfile_write_buf (addr, size);
+}
+
+/* Adjust a function's address to account for architectural
+   particularities.  */
+
+static uintptr_t
+adjust_function_address (uintptr_t func_addr)
+{
+#if defined(__thumb__) || defined(__thumb2__)
+  /* Although Thumb functions are two-byte aligned, function
+     pointers have the Thumb bit set.  Clear it.  */
+  return func_addr & ~1;
+#else
+  return func_addr;
+#endif
+}
+
+/* Get a function's address as an integer.  */
+
+#define FUNCTION_ADDRESS(FUN) adjust_function_address ((uintptr_t) &FUN)
+
+void
 write_basic_trace_file (void)
 {
   int fd, int_x;
-  short short_x;
-  long func_addr;
+  unsigned long long func_addr;
 
   fd = start_trace_file ("basic.tf");
 
@@ -86,15 +138,9 @@ write_basic_trace_file (void)
 
   /* Dump tracepoint definitions, in syntax similar to that used
      for reconnection uploads.  */
-  /* FIXME need a portable way to print function address in hex */
-  func_addr = (long) &write_basic_trace_file;
-#if defined(__thumb__) || defined(__thumb2__)
-  /* Although Thumb functions are two-byte aligned, function
-     pointers have the Thumb bit set.  Clear it.  */
-  func_addr &= ~1;
-#endif
+  func_addr = FUNCTION_ADDRESS (write_basic_trace_file);
 
-  snprintf (spbuf, sizeof spbuf, "tp T1:%lx:E:0:0\n", func_addr);
+  snprintf (spbuf, sizeof spbuf, "tp T1:%llx:E:0:0\n", func_addr);
   write (fd, spbuf, strlen (spbuf));
   /* (Note that we would only need actions defined if we wanted to
      test tdump.) */
@@ -106,14 +152,13 @@ write_basic_trace_file (void)
   /* (Encapsulate better if we're going to do lots of this; note that
      buffer endianness is the target program's enddianness.) */
   trptr = trbuf;
-  short_x = 1;
-  memcpy (trptr, &short_x, 2);
-  trptr += 2;
+  tfile_write_16 (1);
+
   tfsizeptr = trptr;
   trptr += 4;
-  add_memory_block (&testglob, sizeof (testglob));
+  add_memory_block ((char *) &testglob, sizeof (testglob));
   /* Divide a variable between two separate memory blocks.  */
-  add_memory_block (&testglob2, 1);
+  add_memory_block ((char *) &testglob2, 1);
   add_memory_block (((char*) &testglob2) + 1, sizeof (testglob2) - 1);
   /* Go back and patch in the frame size.  */
   int_x = trptr - tfsizeptr - sizeof (int);
@@ -158,8 +203,8 @@ write_error_trace_file (void)
 {
   int fd;
   const char made_up[] = "made-up error";
+  char hex[(sizeof (made_up) - 1) * 2 + 1];
   int len = sizeof (made_up) - 1;
-  char *hex = alloca (len * 2 + 1);
 
   fd = start_trace_file ("error.tf");
 
@@ -183,9 +228,8 @@ write_error_trace_file (void)
 
   /* Dump tracepoint definitions, in syntax similar to that used
      for reconnection uploads.  */
-  /* FIXME need a portable way to print function address in hex */
-  snprintf (spbuf, sizeof spbuf, "tp T1:%lx:E:0:0\n",
-	    (long) &write_basic_trace_file);
+  snprintf (spbuf, sizeof spbuf, "tp T1:%llx:E:0:0\n",
+	    (unsigned long long) FUNCTION_ADDRESS (write_basic_trace_file));
   write (fd, spbuf, strlen (spbuf));
   /* (Note that we would only need actions defined if we wanted to
      test tdump.) */
@@ -210,7 +254,7 @@ done_making_trace_files (void)
 }
 
 int
-main (int argc, char **argv, char **envp)
+main (void)
 {
   write_basic_trace_file ();
 
Index: gdb-7.6.1/gdb/testsuite/gdb.trace/tfile.exp
===================================================================
--- gdb-7.6.1.orig/gdb/testsuite/gdb.trace/tfile.exp
+++ gdb-7.6.1/gdb/testsuite/gdb.trace/tfile.exp
@@ -26,7 +26,7 @@ gdb_exit
 gdb_start
 standard_testfile
 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
-	  executable {debug nowarnings}] != "" } {
+	  executable {debug}] != "" } {
     untested ${testfile}.exp
     return -1
 }