Fix presubmit failure in gdb-jit.cc.

src/gdb-jit.cc

 // Copyright 2010 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 249 matching lines @@
   virtual void PopulateHeader(Writer::Slot<Header> header) {
     header->addr = 0;
     header->size = 0;
     header->offset = 0;
     header->align = align_;
     header->reloff = 0;
     header->nreloc = 0;
     header->flags = flags_;
     header->reserved1 = 0;
     header->reserved2 = 0;
-    memset(header->sectname, 0, 16);
-    memset(header->segname, 0, 16);
-    ASSERT(strlen(name_) < 16);
-    ASSERT(strlen(segment_) < 16);
-    strcpy(header->sectname, name_);
-    strcpy(header->segname, segment_);
+    memset(header->sectname, 0, sizeof(header->sectname));
+    memset(header->segname, 0, sizeof(header->segname));
+    ASSERT(strlen(name_) < sizeof(header->sectname));
+    ASSERT(strlen(segment_) < sizeof(header->segname));
+    strncpy(header->sectname, name_, sizeof(header->sectname));
+    strncpy(header->segname, segment_, sizeof(header->segname));
   }
 
  private:
   const char* name_;
   const char* segment_;
   uintptr_t align_;
   uint32_t flags_;
 };
 
 
 struct ELFSectionHeader {
   uint32_t name;
   uint32_t type;
   uintptr_t flags;
   uintptr_t address;
   uintptr_t offset;
   uintptr_t size;
   uint32_t link;
   uint32_t info;
   uintptr_t alignment;
   uintptr_t entry_size;
 };
-  
+
 
 #if defined(__ELF)
 class ELFSection : public DebugSectionBase<ELFSectionHeader> {
  public:
   enum Type {
     TYPE_NULL = 0,
     TYPE_PROGBITS = 1,
     TYPE_SYMTAB = 2,
     TYPE_STRTAB = 3,
     TYPE_RELA = 4,
@@ skipping 1840 matching lines @@
   ScopedLock lock(mutex_);
   ASSERT(!IsLineInfoTagged(line_info));
   HashMap::Entry* e = GetEntries()->Lookup(code, HashForCodeObject(code), true);
   ASSERT(e->value == NULL);
   e->value = TagLineInfo(line_info);
 }
 
 
 } }  // namespace v8::internal
 #endif