Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 141 insertions, 0 deletions

diff --git a/gcc-4.9/libsanitizer/sanitizer_common/sanitizer_flags.cc b/gcc-4.9/libsanitizer/sanitizer_common/sanitizer_flags.cc
new file mode 100644
index 000000000..90bb57dff
--- /dev/null
+++ b/gcc-4.9/libsanitizer/sanitizer_common/sanitizer_flags.cc
@@ -0,0 +1,141 @@
+//===-- sanitizer_flags.cc ------------------------------------------------===//
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
+//
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_flags.h"
+
+#include "sanitizer_common.h"
+#include "sanitizer_libc.h"
+
+namespace __sanitizer {
+
+void SetCommonFlagsDefaults(CommonFlags *f) {
+  f->symbolize = true;
+  f->external_symbolizer_path = 0;
+  f->strip_path_prefix = "";
+  f->fast_unwind_on_fatal = false;
+  f->fast_unwind_on_malloc = true;
+  f->handle_ioctl = false;
+  f->malloc_context_size = 1;
+  f->log_path = "stderr";
+  f->verbosity = 0;
+  f->detect_leaks = false;
+  f->leak_check_at_exit = true;
+  f->allocator_may_return_null = false;
+  f->print_summary = true;
+}
+
+void ParseCommonFlagsFromString(CommonFlags *f, const char *str) {
+  ParseFlag(str, &f->symbolize, "symbolize");
+  ParseFlag(str, &f->external_symbolizer_path, "external_symbolizer_path");
+  ParseFlag(str, &f->strip_path_prefix, "strip_path_prefix");
+  ParseFlag(str, &f->fast_unwind_on_fatal, "fast_unwind_on_fatal");
+  ParseFlag(str, &f->fast_unwind_on_malloc, "fast_unwind_on_malloc");
+  ParseFlag(str, &f->handle_ioctl, "handle_ioctl");
+  ParseFlag(str, &f->malloc_context_size, "malloc_context_size");
+  ParseFlag(str, &f->log_path, "log_path");
+  ParseFlag(str, &f->verbosity, "verbosity");
+  ParseFlag(str, &f->detect_leaks, "detect_leaks");
+  ParseFlag(str, &f->leak_check_at_exit, "leak_check_at_exit");
+  ParseFlag(str, &f->allocator_may_return_null, "allocator_may_return_null");
+  ParseFlag(str, &f->print_summary, "print_summary");
+
+  // Do a sanity check for certain flags.
+  if (f->malloc_context_size < 1)
+    f->malloc_context_size = 1;
+}
+
+static bool GetFlagValue(const char *env, const char *name,
+                         const char **value, int *value_length) {
+  if (env == 0)
+    return false;
+  const char *pos = 0;
+  for (;;) {
+    pos = internal_strstr(env, name);
+    if (pos == 0)
+      return false;
+    if (pos != env && ((pos[-1] >= 'a' && pos[-1] <= 'z') || pos[-1] == '_')) {
+      // Seems to be middle of another flag name or value.
+      env = pos + 1;
+      continue;
+    }
+    break;
+  }
+  pos += internal_strlen(name);
+  const char *end;
+  if (pos[0] != '=') {
+    end = pos;
+  } else {
+    pos += 1;
+    if (pos[0] == '"') {
+      pos += 1;
+      end = internal_strchr(pos, '"');
+    } else if (pos[0] == '\'') {
+      pos += 1;
+      end = internal_strchr(pos, '\'');
+    } else {
+      // Read until the next space or colon.
+      end = pos + internal_strcspn(pos, " :");
+    }
+    if (end == 0)
+      end = pos + internal_strlen(pos);
+  }
+  *value = pos;
+  *value_length = end - pos;
+  return true;
+}
+
+static bool StartsWith(const char *flag, int flag_length, const char *value) {
+  if (!flag || !value)
+    return false;
+  int value_length = internal_strlen(value);
+  return (flag_length >= value_length) &&
+         (0 == internal_strncmp(flag, value, value_length));
+}
+
+void ParseFlag(const char *env, bool *flag, const char *name) {
+  const char *value;
+  int value_length;
+  if (!GetFlagValue(env, name, &value, &value_length))
+    return;
+  if (StartsWith(value, value_length, "0") ||
+      StartsWith(value, value_length, "no") ||
+      StartsWith(value, value_length, "false"))
+    *flag = false;
+  if (StartsWith(value, value_length, "1") ||
+      StartsWith(value, value_length, "yes") ||
+      StartsWith(value, value_length, "true"))
+    *flag = true;
+}
+
+void ParseFlag(const char *env, int *flag, const char *name) {
+  const char *value;
+  int value_length;
+  if (!GetFlagValue(env, name, &value, &value_length))
+    return;
+  *flag = static_cast<int>(internal_atoll(value));
+}
+
+static LowLevelAllocator allocator_for_flags;
+
+void ParseFlag(const char *env, const char **flag, const char *name) {
+  const char *value;
+  int value_length;
+  if (!GetFlagValue(env, name, &value, &value_length))
+    return;
+  // Copy the flag value. Don't use locks here, as flags are parsed at
+  // tool startup.
+  char *value_copy = (char*)(allocator_for_flags.Allocate(value_length + 1));
+  internal_memcpy(value_copy, value, value_length);
+  value_copy[value_length] = '\0';
+  *flag = value_copy;
+}
+
+}  // namespace __sanitizer