mirror of
https://github.com/openvswitch/ovs
synced 2025-10-17 14:28:02 +00:00
f937ccc232
This avoids a fairly common issue in which a developer cuts and pastes a structure definition and forgets to update the structure name inside the OFP_ASSERT, so that the new structure's size doesn't really get checked at all.
57 lines
1.3 KiB
Plaintext
57 lines
1.3 KiB
Plaintext
AT_BANNER([struct alignment checker unit tests])
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m4_define([check_structs], [$top_srcdir/build-aux/check-structs])
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m4_define([RUN_STRUCT_CHECKER],
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[AT_KEYWORDS([check-structs])
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AT_SKIP_IF([test $HAVE_PYTHON = no])
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AT_DATA([test.h], [$1
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])
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AT_CHECK_UNQUOTED([$PYTHON check_structs test.h], [$2], [$3], [$4])])
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AT_SETUP([check struct tail padding])
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RUN_STRUCT_CHECKER(
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[struct xyz {
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uint16_t x;
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};],
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[1], [],
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[test.h:3: warning: struct xyz needs 2 bytes of tail padding
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])
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AT_CLEANUP
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AT_SETUP([check struct internal alignment])
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RUN_STRUCT_CHECKER(
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[struct xyzzy {
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uint16_t x;
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uint32_t y;
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};],
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[1], [],
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[test.h:3: warning: struct xyzzy member y is 2 bytes short of 4-byte alignment
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])
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AT_CLEANUP
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AT_SETUP([check struct declared size])
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RUN_STRUCT_CHECKER(
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[struct wibble {
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uint64_t z;
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};
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OFP_ASSERT(sizeof(struct wibble) == 12);
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],
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[1], [],
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[test.h:4: warning: struct wibble is 8 bytes long but declared as 12
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])
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AT_CLEANUP
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AT_SETUP([check wrong struct's declared size])
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RUN_STRUCT_CHECKER(
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[struct moo {
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uint64_t bar;
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};
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OFP_ASSERT(sizeof(struct moo) == 8);
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struct wibble {
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uint64_t z;
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};
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OFP_ASSERT(sizeof(struct moo) == 8);
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], [1], [], [test.h:8: warning: checking size of struct moo but struct wibble was most recently defined
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])
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AT_CLEANUP
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