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multiple map elements support

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varun-r-mallya
2025-09-11 00:45:08 +05:30
parent 7de3a381b0
commit 431921dbc1
3 changed files with 18 additions and 4 deletions
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2
examples/c-form/ex3-2.bpf.c
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@ -8,7 +8,7 @@ struct {
__uint(type, BPF_MAP_TYPE_HASH); __uint(type, BPF_MAP_TYPE_HASH);
__type(key, u64); __type(key, u64);
__type(value, u64); __type(value, u64);
__uint(max_entries, 1); __uint(max_entries, 4);
} last SEC(".maps"); } last SEC(".maps");
// Handler for syscall entry // Handler for syscall entry

10
examples/execve3.py
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@ -8,7 +8,7 @@ from ctypes import c_void_p, c_int64, c_int32, c_uint64
@bpf @bpf
@map @map
def last() -> HashMap: def last() -> HashMap:
return HashMap(key_type=c_uint64, value_type=c_uint64, max_entries=1) return HashMap(key_type=c_uint64, value_type=c_uint64, max_entries=3)
@bpf @bpf
@ -37,7 +37,13 @@ def hello_again(ctx: c_void_p) -> c_int64:
if x: if x:
print("we did not prevail") print("we did not prevail")
ts = ktime() ts = ktime()
last().update(key, ts, 0) last().update(key, ts)
keys = 2
last().update(keys, ts)
key = 4
last().update(key, ts)
key = 5
last().update(key, ts)
return c_int64(0) return c_int64(0)

10
pythonbpf/maps_pass.py
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@ -74,6 +74,14 @@ def create_map_debug_info(module, map_global, map_name, map_params):
"size": 32, "size": 32,
"elements": [array_subrange] "elements": [array_subrange]
}) })
array_subrange_max_entries = module.add_debug_info("DISubrange", {"count": map_params["max_entries"]})
array_type_max_entries = module.add_debug_info("DICompositeType", {
"tag": dc.DW_TAG_array_type,
"baseType": uint_type,
"size": 32,
"elements": [array_subrange_max_entries]
})
# Create pointer types # Create pointer types
type_ptr = module.add_debug_info("DIDerivedType", { type_ptr = module.add_debug_info("DIDerivedType", {
@ -84,7 +92,7 @@ def create_map_debug_info(module, map_global, map_name, map_params):
max_entries_ptr = module.add_debug_info("DIDerivedType", { max_entries_ptr = module.add_debug_info("DIDerivedType", {
"tag": dc.DW_TAG_pointer_type, "tag": dc.DW_TAG_pointer_type,
"baseType": array_type, "baseType": array_type_max_entries,
"size": 64 "size": 64
}) })