purego: add a fuzz test for struct ABI round trips - #530
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Decode fuzzer bytes into struct shapes via a sequential opcode stream, compile the equivalent C once per content hash, and compare round trips byte-for-byte through the real C ABI. Seeds run on every plain go test; new shapes are explored under go test -fuzz.
Use internal/load instead of purego.Dlopen/Dlclose directly and match the struct_test.go build tags, since Dlopen does not exist on Windows.
CI minor-arches runs several QEMU targets in sequence on one runner with a shared /tmp; without the arch in the key a ppc64le run picks up a loong64 .so and Dlopen fails.
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CI arm runs hard-float and soft-float back to back on one runner sharing /tmp with different CCs under the same GOARCH.
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What issue is this addressing?
#528
What type of issue is this addressing?
feature
What this PR does | solves
Decode fuzzer bytes into struct shapes via a sequential opcode stream, compile the equivalent C once per content hash, and compare round trips byte-for-byte through the real C ABI. Seeds run on every plain go test; new shapes are explored under go test -fuzz.