Print out values and keys as signed integers

src/bpftrace.cpp

@@ -90,7 +90,7 @@ int BPFtrace::print_map(Map &map) const
   {
     std::cout << map.name_ << map.key_.argument_value_list(*this, key) << ": ";
 
-    uint64_t value;
+    int64_t value;
     int err = bpf_lookup_elem(map.mapfd_, key.data(), &value);
     if (err)
     {
@@ -264,7 +264,7 @@ std::vector<uint8_t> BPFtrace::find_empty_key(Map &map, size_t size) const
   throw std::runtime_error("Could not find empty key");
 }
 
-std::string BPFtrace::get_stack(uint64_t stackid, int indent) const
+std::string BPFtrace::get_stack(uint32_t stackid, int indent) const
 {
   auto stack_trace = std::vector<uint64_t>(MAX_STACK_SIZE);
   int err = bpf_lookup_elem(stackid_map_->mapfd_, &stackid, stack_trace.data());

src/bpftrace.h

@@ -19,7 +19,7 @@ public:
   int start();
   void stop();
   int print_maps() const;
-  std::string get_stack(uint64_t stackid, int indent=0) const;
+  std::string get_stack(uint32_t stackid, int indent=0) const;
 
   std::map<std::string, std::unique_ptr<Map>> maps_;
   std::map<std::string, std::tuple<uint8_t *, uintptr_t>> sections_;

src/map.cpp

@@ -29,7 +29,7 @@ Map::Map(std::string name) : name_(name)
 {
   // Only used for creating maps for storing stack IDs
   int key_size = 4;
-  int value_size = 8 * MAX_STACK_SIZE;
+  int value_size = sizeof(uintptr_t) * MAX_STACK_SIZE;
   int max_entries = 128;
   int flags = 0;
   mapfd_ = bpf_create_map(BPF_MAP_TYPE_STACK_TRACE, key_size, value_size, max_entries, flags);

src/mapkey.cpp

@@ -61,9 +61,9 @@ std::string MapKey::argument_value(const BPFtrace &bpftrace,
       switch (arg.size)
       {
         case 8:
-          return std::to_string(*(uint64_t*)data);
+          return std::to_string(*(int64_t*)data);
         case 4:
-          return std::to_string(*(uint32_t*)data);
+          return std::to_string(*(int32_t*)data);
       }
     case Type::stack:
       return bpftrace.get_stack(*(uint32_t*)data);