Fix potential missing nul character on resolved symbol names

third_party/tcmalloc/chromium/src/windows/addr2line-pdb.c

Index: third_party/tcmalloc/chromium/src/windows/addr2line-pdb.c
diff --git a/third_party/tcmalloc/chromium/src/windows/addr2line-pdb.c b/third_party/tcmalloc/chromium/src/windows/addr2line-pdb.c
index 7a2bf3e6f45f52d5b8533eb0ea5660d17b18be20..3d4a0c531ce41e8b24e63a9571d98ea49ce779a3 100644
--- a/third_party/tcmalloc/chromium/src/windows/addr2line-pdb.c
+++ b/third_party/tcmalloc/chromium/src/windows/addr2line-pdb.c
@@ -1,10 +1,10 @@
 /* Copyright (c) 2008, Google Inc.
  * All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ -14,7 +14,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -37,11 +37,11 @@
 
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
-#endif 
+#endif
 
 #ifndef _CRT_SECURE_NO_WARNINGS
 #define _CRT_SECURE_NO_WARNINGS
-#endif 
+#endif
 
 #ifndef _CRT_SECURE_NO_DEPRECATE
 #define _CRT_SECURE_NO_DEPRECATE
@@ -140,6 +140,7 @@ int main(int argc, char *argv[]) {
                     MAX_SYM_NAME*sizeof(TCHAR) +
                     sizeof(ULONG64) - 1)
                    / sizeof(ULONG64)];
+    memset(buffer, 0, sizeof(buffer));
     PSYMBOL_INFO pSymbol = (PSYMBOL_INFO)buffer;
     IMAGEHLP_LINE64 line;
     DWORD dummy;
@@ -152,7 +153,8 @@ int main(int argc, char *argv[]) {
     ULONG64 absaddr = reladdr + module_base;
 
     pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
-    pSymbol->MaxNameLen = MAX_SYM_NAME;
+    // The length of the name is not including the null-terminating character.
+    pSymbol->MaxNameLen = MAX_SYM_NAME - 1;
     if (print_function_name) {
       if (SymFromAddr(process, (DWORD64)absaddr, NULL, pSymbol)) {
         printf("%s\n", pSymbol->Name);