GDBJIT: Add gdbjit_zone for --gdbjit_full

src/gdb-jit.cc

Index: src/gdb-jit.cc
===================================================================
--- src/gdb-jit.cc	(revision 14041)
+++ src/gdb-jit.cc	(working copy)
@@ -1021,7 +1021,8 @@
 static void CreateSymbolsTable(CodeDescription* desc,
                                ELF* elf,
                                int text_section_index) {
-  Zone* zone = desc->info()->zone();
+  Zone* zone = desc->info() ?
+      desc->info()->zone() : Isolate::Current()->gdbjit_zone();
   ELFSymbolTable* symtab = new(zone) ELFSymbolTable(".symtab", zone);
   ELFStringTable* strtab = new(zone) ELFStringTable(".strtab");
 
@@ -1790,7 +1791,8 @@
 #endif  // V8_TARGET_ARCH_X64
 
 static void CreateDWARFSections(CodeDescription* desc, DebugObject* obj) {
-  Zone* zone = desc->info()->zone();
+  Zone* zone = desc->info() ?
+      desc->info()->zone() : Isolate::Current()->gdbjit_zone();
   if (desc->IsLineInfoAvailable()) {
     obj->AddSection(new(zone) DebugInfoSection(desc), zone);
     obj->AddSection(new(zone) DebugAbbrevSection(desc), zone);
@@ -1916,7 +1918,8 @@
 
 
 static JITCodeEntry* CreateELFObject(CodeDescription* desc) {
-  Zone* zone = desc->info()->zone();
+  Zone* zone = desc->info() ?
+      desc->info()->zone() : Isolate::Current()->gdbjit_zone();
   ZoneScope zone_scope(zone, DELETE_ON_EXIT);
 #ifdef __MACH_O
   MachO mach_o;