1 files changed, 72 insertions, 0 deletions
diff --git a/src/pal/src/libunwind/src/mi/Gset_cache_size.c b/src/pal/src/libunwind/src/mi/Gset_cache_size.c
new file mode 100644
index 0000000000..07b282e2c1
--- /dev/null
+++ b/src/pal/src/libunwind/src/mi/Gset_cache_size.c
@@ -0,0 +1,72 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2014
+        Contributed by Milian Wolff <address@hidden>
+                   and Dave Watson <dade.watson@gmail.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "libunwind_i.h"
+
+int
+unw_set_cache_size (unw_addr_space_t as, size_t size, int flag)
+{
+  size_t power = 1;
+  unsigned short log_size = 0;
+
+  if (!tdep_init_done)
+    tdep_init ();
+
+  if (flag != 0)
+    return -1;
+
+  /* Currently not supported for per-thread cache due to memory leak */
+  /* A pthread-key destructor would work, but is not signal safe */
+#if defined(HAVE___THREAD) && HAVE___THREAD
+  return -1;
+#endif
+
+  /* Round up to next power of two, slowly but portably */
+  while(power < size)
+    {
+      power *= 2;
+      log_size++;
+      /* Largest size currently supported by rs_cache */
+      if (log_size >= 15)
+        break;
+    }
+
+#if !defined(__ia64__)
+  if (log_size == as->global_cache.log_size)
+    return 0;   /* no change */
+
+  as->global_cache.log_size = log_size;
+#endif
+
+  /* Ensure caches are empty (and initialized).  */
+  unw_flush_cache (as, 0, 0);
+#ifdef __ia64__
+  return 0;
+#else
+  /* Synchronously purge cache, to ensure memory is allocated */
+  return dwarf_flush_rs_cache(&as->global_cache);
+#endif
+}