From 9131ff41bb32de9bb320edc3116f8f6b53dbae6a Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sun, 22 Feb 2004 23:18:53 +0000
Subject: 	* gcov-io.c (gcov_open) [GCOV_LOCKED]: Use open + fdopen
 instead of 	fopen. 	* libgcov.c: Include sys/stat.h. 	*
 config/rs6000/linux.h (TARGET_HAS_F_SETLKW): Define. 	*
 config/rs6000/linux64.h (TARGET_HAS_F_SETLKW): Define. 	*
 config/sparc/linux.h (TARGET_HAS_F_SETLKW): Define. 	*
 config/sparc/linux64.h (TARGET_HAS_F_SETLKW): Define.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@78281 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/gcov-io.c | 48 +++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 41 insertions(+), 7 deletions(-)

(limited to 'gcc/gcov-io.c')

diff --git a/gcc/gcov-io.c b/gcc/gcov-io.c
index 99731f79939..0349fb821b2 100644
--- a/gcc/gcov-io.c
+++ b/gcc/gcov-io.c
@@ -65,6 +65,7 @@ gcov_open (const char *name, int mode)
 #endif
 #if GCOV_LOCKED
   struct flock s_flock;
+  int fd;
 
   s_flock.l_type = F_WRLCK;
   s_flock.l_whence = SEEK_SET;
@@ -82,6 +83,44 @@ gcov_open (const char *name, int mode)
 #if !IN_LIBGCOV
   gcov_var.endian = 0;
 #endif
+#if GCOV_LOCKED
+  if (mode > 0)
+    fd = open (name, O_RDWR);
+  else
+    fd = open (name, O_RDWR | O_CREAT, 0666);
+  if (fd < 0)
+    return 0;
+
+  while (fcntl (fd, F_SETLKW, &s_flock) && errno == EINTR)
+    continue;
+
+  gcov_var.file = fdopen (fd, "r+b");
+  if (!gcov_var.file)
+    {
+      close (fd);
+      return 0;
+    }
+
+  if (mode > 0)
+    gcov_var.mode = 1;
+  else if (mode == 0)
+    {
+      struct stat st;
+
+      if (fstat (fd, &st) < 0)
+	{
+	  fclose (gcov_var.file);
+	  gcov_var.file = 0;
+	  return 0;
+	}
+      if (st.st_size != 0)
+	gcov_var.mode = 1;
+      else
+	gcov_var.mode = mode * 2 + 1;
+    }
+  else
+    gcov_var.mode = mode * 2 + 1;
+#else
   if (mode >= 0)
     gcov_var.file = fopen (name, "r+b");
   if (gcov_var.file)
@@ -94,15 +133,10 @@ gcov_open (const char *name, int mode)
     }
   if (!gcov_var.file)
     return 0;
-  
-  setbuf (gcov_var.file, (char *)0);
-  
-#if GCOV_LOCKED
-  while (fcntl (fileno (gcov_var.file), F_SETLKW, &s_flock)
-	 && errno == EINTR)
-    continue;
 #endif
 
+  setbuf (gcov_var.file, (char *)0);
+  
   return 1;
 }
 
-- 
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