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fix: do not shift in map_by_fd #344

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yunwei37 wants to merge 5 commits into from
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fix: do not shift in map_by_fd #344

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633e15a
fix map_val
yunwei37 Sep 2, 2024
55ecd9f
update
yunwei37 Sep 2, 2024
870cde7
Merge branch 'master' into fx-map_val
yunwei37 Apr 10, 2025
872ff64
Merge branch 'master' into fx-map_val
yunwei37 May 25, 2025
fdfe8a1
Merge branch 'master' into fx-map_val
yunwei37 Aug 23, 2025
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2 changes: 1 addition & 1 deletion runtime/src/bpf_map/userspace/map_in_maps.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ class array_map_of_maps_impl : public array_map_impl {
{
auto key_val = array_map_impl::elem_lookup(key);
int map_id = *(int *)key_val;
return (void *)((u_int64_t)map_id << 32);
return (void *)((u_int64_t)map_id);
}
};

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4 changes: 2 additions & 2 deletions runtime/src/bpftime_shm.cpp
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Expand Up @@ -581,13 +581,13 @@ extern "C" uint64_t map_ptr_by_fd(uint32_t fd)
return INVALID_MAP_PTR;
}
// Use a convenient way to represent a pointer
return ((uint64_t)fd << 32) | 0xffffffff;
return fd;
}

extern "C" uint64_t map_val(uint64_t map_ptr)
{
SPDLOG_DEBUG("Call map_val with map_ptr={:x}", map_ptr);
int fd = (int)(map_ptr >> 32);
int fd = (int)map_ptr;
if (!shm_holder.global_shared_memory.get_manager() ||
!shm_holder.global_shared_memory.is_map_fd(fd)) {
SPDLOG_ERROR("Expected fd {} to be a map fd (map_val call)",
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