Files
reverse-engineering-anything/src/dotnet/ManagedSignatureResolution.test.ts
T
morluto 7bcefead69 test: strengthen and prune audited test coverage (#8573)
* test: strengthen and prune audited test coverage

* test: require delivered DeepSeek skill instructions

* test: keep schema fixture types private

* test: verify Gemini receives skill instructions

* test: bind Qwen skill evidence to its tool result

* test: report NativeAOT verifier checks precisely

* fix: verify Ghidra cleanup paths reliably

* fix: verify Command Code skill activation

* test: tighten cleanup and fixture checks

* test: verify packet capture evidence is recorded

* fix: report HTTP3 capture provenance accurately

* test: preserve resource coverage through MCP

* test: prune repeated assertions and retain cancellation identity

* fix: validate client verifier fixture paths

* test: skip Copilot verifier cases on Windows

* test: keep verifier setup target relative
2026-11-02 02:13:32 +08:00

752 lines
25 KiB
TypeScript

import { fc } from "@fast-check/vitest";
import { createHash } from "node:crypto";
import { describe, expect, it, vi } from "vitest";
import {
attachManagedDecodeBudget,
ManagedDecodeBudget,
} from "./ManagedDecodeBudget.js";
import type { ManagedParseIssue } from "../domain/managed/managedArtifact.js";
import { inspectManagedMembersBytes } from "./ManagedMemberInspector.js";
import {
parseTypes,
signature,
readTypeDefinitions,
type SignatureTypeName,
} from "./ManagedMemberInspectorCore.js";
import {
metadataRowOffset,
readManagedMetadataLayout,
} from "./ManagedMetadataLayout.js";
import {
buildManagedPeFixture,
managedPeFixtureTarget,
} from "./ManagedPe.fixture.js";
import { readManagedPeLayout } from "./ManagedPeReader.js";
import { compareManagedMembers } from "../domain/managed/managedMemberComparison.js";
import { managedMemberInspectionSchema } from "../domain/managed/managedArtifact.js";
import { managedSignatureTypeNames } from "./ManagedSignatureTypeNames.js";
import { metadataCodedIndexCoordinate } from "./ManagedMetadataHeaps.js";
import { managedTypeReferences } from "./ManagedTypeReferences.js";
import { readTypeMemberListFacts } from "./ManagedTypeMemberLists.js";
// A top-level type's name digest, as ManagedSignatureTypeNames forms it.
const nameDigest = (name: string): Buffer => {
const dot = name.lastIndexOf(".");
return createHash("sha256")
.update(Buffer.from([0]))
.update(dot === -1 ? "" : name.slice(0, dot))
.update(Buffer.from([0]))
.update(name.slice(dot + 1))
.digest();
};
const metadataLayout = (bytes: Buffer) => {
const pe = readManagedPeLayout(bytes);
if (pe.cli === null) throw new Error("Fixture has no CLI metadata");
return readManagedMetadataLayout(
bytes,
pe.rvaToOffset(pe.cli.metadata.rva, pe.cli.metadata.size, "cli.metadata"),
pe.cli.metadata.size,
);
};
const named =
(names: Readonly<Record<number, string>>) =>
({ value }: Parameters<SignatureTypeName>[0]): Buffer | null => {
const name = names[value];
return name === undefined ? null : nameDigest(name);
};
describe("layoutless signature coordinates", () => {
it.each([
[0, 2, 0],
[0x25, 1, 9],
[0x07, undefined, 1],
] as const)(
"keeps layoutless operand %s decoded without admitting a metadata row",
(value, table, row) => {
const name = vi.fn<SignatureTypeName>(() => Buffer.alloc(32));
const result = signature(
Buffer.from([0x06, 0x12, value]),
undefined,
name,
);
expect(result.parse_status).toBe("decoded");
expect(result.resolved_sha256).toMatch(/^[0-9a-f]{64}$/u);
expect(name).toHaveBeenCalledTimes(1);
expect(name).toHaveBeenCalledWith(
expect.objectContaining({ value, coordinate: { table, row } }),
);
},
);
});
describe("resolved member signature digests", () => {
it("names modifier, class, and generic type operands instead of their rows", () => {
// modreq(M) G<P> on the left and the same types at other rows on the right.
const left = signature(
Buffer.from([0x06, 0x1f, 0x05, 0x15, 0x12, 0x09, 0x01, 0x11, 0x0d]),
undefined,
named({ 0x05: "N.Mod", 0x09: "N.G`1", 0x0d: "N.P" }),
);
const right = signature(
Buffer.from([0x06, 0x1f, 0x15, 0x15, 0x12, 0x19, 0x01, 0x11, 0x1d]),
undefined,
named({ 0x15: "N.Mod", 0x19: "N.G`1", 0x1d: "N.P" }),
);
expect(left.raw_sha256).not.toBe(right.raw_sha256);
expect(left.resolved_sha256).toMatch(/^[0-9a-f]{64}$/u);
expect(left.resolved_sha256).toBe(right.resolved_sha256);
});
it("keeps the raw digest for a signature without type operands", () => {
const decoded = signature(Buffer.from([0x00, 0x01, 0x08, 0x0e]));
expect(decoded.resolved_sha256).toBe(decoded.raw_sha256);
});
it("withholds the digest when an operand has no name", () => {
expect(
signature(Buffer.from([0x06, 0x12, 0x05]), undefined, named({}))
.resolved_sha256,
).toBeNull();
});
it("leaves a blob forged from a resolved preimage undecoded", () => {
// The resolved preimage of class "A": 0xff, then the name digest. 0xff
// never starts a compressed coded index, so the forged blob does not
// decode and has only a raw digest, equal to the resolved one; comparison
// tags the two kinds apart.
const forged = signature(
Buffer.concat([Buffer.from([0x06, 0x12, 0xff]), nameDigest("A")]),
);
const resolved = signature(
Buffer.from([0x06, 0x12, 0x05]),
undefined,
named({ 0x05: "A" }),
);
expect(forged.parse_status).toBe("malformed");
expect(forged.resolved_sha256).toBeNull();
expect(forged.raw_sha256).toBe(resolved.resolved_sha256);
});
it("decodes a valid but unnamed non-generic TypeSpec operand", () => {
const inspection = fieldOf({
typeSpecSignatures: [Buffer.from([0x08])],
fieldSignature: Buffer.from([0x06, 0x12, (1 << 2) | 2]),
});
const field = inspection.fields[0];
expect(field?.signature.parse_status).toBe("decoded");
expect(field?.signature.resolved_sha256).toBeNull();
});
});
describe("metadata type-name digest ownership", () => {
it("shares declaration and operand identity while preserving invalid TypeDef diagnostics", () => {
const bytes = buildManagedPeFixture();
const layout = metadataLayout(bytes);
const issues: ManagedParseIssue[] = [];
const names = managedSignatureTypeNames(
layout,
issues,
{ types: [], nesting: { enclosing: new Map(), complete: true } },
managedTypeReferences(bytes, layout, issues),
);
for (const row of [0, 9]) {
expect(names.declaration(2, row)).toBeNull();
const value = row * 4;
expect(
names.operand({
value,
coordinate: metadataCodedIndexCoordinate(value, 2, [2, 1, 27]),
}),
).toBeNull();
}
expect(issues).toMatchObject([
{
code: "invalid-row",
scope: "metadata.signature.type:2:0",
detail: "Signature references an unavailable TypeDef row 0",
},
{
code: "invalid-row",
scope: "metadata.signature.type:2:9",
detail: "Signature references an unavailable TypeDef row 9",
},
]);
});
it("names each type operand once, so repeated operands are not charged again", () => {
const bytes = buildManagedPeFixture({
typeReferences: [{ namespace: "System", name: "Uri" }],
});
const layout = metadataLayout(bytes);
const budget = new ManagedDecodeBudget();
attachManagedDecodeBudget(layout, budget);
const typeNames = managedSignatureTypeNames(
layout,
[],
{
types: [],
nesting: { enclosing: new Map(), complete: true },
},
managedTypeReferences(bytes, layout, []),
);
const uri = (2 << 2) | 1;
const operand = {
value: uri,
coordinate: metadataCodedIndexCoordinate(uri, 2, [2, 1, 27]),
};
expect(typeNames.operand(operand)).toEqual(nameDigest("System.Uri"));
const reserve = vi.spyOn(budget, "reserve");
expect(typeNames.operand(operand)).toEqual(nameDigest("System.Uri"));
expect(typeNames.declaration(1, 2)).toEqual(nameDigest("System.Uri"));
expect(typeNames.displayName(operand)).toBe("System.Uri");
expect(reserve).not.toHaveBeenCalled();
});
it("bounds name loading before resolving a deep real TypeRef scope chain", () => {
const name = "X".repeat(2048);
const rows = 10_000;
const bytes = buildManagedPeFixture({
fieldSignature: Buffer.from([0x06, 0x12, (2 << 2) | 1]),
typeReferences: Array.from({ length: rows }, (_, index) => ({
namespace: "",
name,
...(index + 1 === rows ? {} : { enclosingRow: index + 3 }),
})),
});
const layout = metadataLayout(bytes);
const first =
metadataRowOffset(layout, 1, 2) +
layout.codedIndexSize("ResolutionScope");
const sharedName =
layout.stringIndexSize === 4
? bytes.readUInt32LE(first)
: bytes.readUInt16LE(first);
for (let row = 3; row <= rows + 1; row += 1) {
const offset =
metadataRowOffset(layout, 1, row) +
layout.codedIndexSize("ResolutionScope");
if (layout.stringIndexSize === 4) bytes.writeUInt32LE(sharedName, offset);
else bytes.writeUInt16LE(sharedName, offset);
}
const issues: Parameters<typeof managedTypeReferences>[2] = [];
const parsedTypes = parseTypes(
bytes,
layout,
readTypeDefinitions(
bytes,
layout,
issues,
readTypeMemberListFacts(bytes, layout),
),
);
const resolve = managedSignatureTypeNames(
layout,
issues,
parsedTypes,
managedTypeReferences(bytes, layout, issues),
);
expect(() => resolve.declaration(1, 2)).not.toThrow();
expect(resolve.declaration(1, 2)).toBeNull();
expect(issues).toEqual([]);
const inspection = inspectManagedMembersBytes(
bytes,
managedPeFixtureTarget(bytes),
);
expect(inspection.coverage).toEqual({ state: "complete", issues: [] });
expect(inspection.fields[0]).toBeDefined();
expect(inspection.fields[0]?.signature.resolved_sha256).toBeNull();
});
});
const fieldOf = (options: Parameters<typeof buildManagedPeFixture>[0]) => {
const bytes = buildManagedPeFixture(options);
return inspectManagedMembersBytes(bytes, managedPeFixtureTarget(bytes));
};
describe("type operand names", () => {
it("keeps a TypeRef's namespace and name apart", () => {
const resolved = (namespace: string, name: string) =>
fieldOf({
typeReferences: [{ namespace, name }],
fieldSignature: Buffer.from([0x06, 0x12, (2 << 2) | 1]),
}).fields[0]?.signature.resolved_sha256;
expect(resolved("A", "B.C")).toMatch(/^[0-9a-f]{64}$/u);
expect(resolved("A", "B.C")).not.toBe(resolved("A.B", "C"));
});
it("keeps a TypeDef's namespace and name apart", () => {
const resolved = (typeNamespace: string, typeName: string) =>
fieldOf({
typeNamespace,
typeName,
fieldSignature: Buffer.from([0x06, 0x12, 1 << 2]),
}).fields[0]?.signature.resolved_sha256;
expect(resolved("A", "B.C")).toMatch(/^[0-9a-f]{64}$/u);
expect(resolved("A", "B.C")).not.toBe(resolved("A.B", "C"));
});
it("names a TypeDef and a TypeRef of one namespace and name alike", () => {
const definition = fieldOf({
fieldSignature: Buffer.from([0x06, 0x12, 1 << 2]),
}).fields[0]?.signature.resolved_sha256;
const reference = fieldOf({
typeReferences: [{ namespace: "Fixture", name: "Program" }],
fieldSignature: Buffer.from([0x06, 0x12, (2 << 2) | 1]),
}).fields[0]?.signature.resolved_sha256;
expect(definition).toMatch(/^[0-9a-f]{64}$/u);
expect(definition).toBe(reference);
});
it("reports an unreadable TypeRef operand row once in coverage", () => {
const uri = (2 << 2) | 1;
const bytes = buildManagedPeFixture({
typeReferences: [{ namespace: "System", name: "Uri" }],
fieldSignature: Buffer.from([0x06, 0x12, uri]),
methodSignature: Buffer.from([0x00, 0x00, 0x12, uri]),
});
const layout = metadataLayout(bytes);
// An out-of-range name index makes TypeRef row 2 unreadable.
bytes.writeUInt16LE(
0xffff,
metadataRowOffset(layout, 1, 2) +
layout.codedIndexSize("ResolutionScope"),
);
const inspection = inspectManagedMembersBytes(
bytes,
managedPeFixtureTarget(bytes),
);
expect(inspection.fields[0]?.signature.resolved_sha256).toBeNull();
expect(inspection.coverage.state).toBe("partial");
expect(inspection.coverage.issues).toEqual([
expect.objectContaining({
code: "invalid-heap-index",
scope: "metadata.#Strings",
}),
]);
});
it("retains an operand outside its type table as incomplete coverage", () => {
const inspection = fieldOf({
fieldSignature: Buffer.from([0x06, 0x12, (9 << 2) | 1]),
});
expect(inspection.fields[0]?.signature.parse_status).toBe("malformed");
expect(inspection.fields[0]?.signature.issue).toContain(
"coded index selects row 9 in table 1, which has 1 rows",
);
expect(inspection.fields[0]?.signature.resolved_sha256).toBeNull();
expect(inspection.coverage.state).toBe("partial");
expect(inspection.coverage.issues).toEqual([
expect.objectContaining({ code: "invalid-row" }),
]);
});
it("preserves readable TypeRef names while withholding an invalid scope's signature identity", () => {
const inspection = fieldOf({
typeRefScopeRaw: (99 << 2) | 2,
fieldSignature: Buffer.from([0x06, 0x12, (1 << 2) | 1]),
memberRefParentRaw: (1 << 3) | 1,
});
expect(inspection.fields[0]?.signature.resolved_sha256).toBeNull();
expect(inspection.member_refs[0]?.parent_name).toBe(
"System.Runtime.Versioning.TargetFrameworkAttribute",
);
expect(inspection.coverage.state).toBe("partial");
expect(inspection.coverage.issues).toEqual([
expect.objectContaining({
code: "invalid-row",
scope: "metadata.TypeRef:0x01000001",
}),
]);
});
it.each([
{
rows: [
[1, 2],
[1, 2],
],
},
{
rows: [
[1, 2],
[1, 3],
],
},
{ rows: [[1, 1]] },
{ rows: [[1, 0]] },
{ rows: [[0, 2]] },
{ rows: [[1, 4]] },
] as const)(
"withholds TypeDef identity for invalid nesting $rows",
({ rows }) => {
const inspection = fieldOf({
additionalEmptyTypes: 2,
nestedTypes: rows,
fieldSignature: Buffer.from([0x06, 0x12, 1 << 2]),
});
expect(inspection.fields[0]?.signature.resolved_sha256).toBeNull();
expect(inspection.coverage.state).toBe("partial");
expect(inspection.coverage.issues).toEqual([
expect.objectContaining({ code: "invalid-row" }),
]);
},
);
});
const inspectDisplayFixture = (
options: Parameters<typeof buildManagedPeFixture>[0],
) => {
const bytes = buildManagedPeFixture({
typeSpecSignatures: [Buffer.from([0x08])],
...options,
});
return inspectManagedMembersBytes(bytes, managedPeFixtureTarget(bytes));
};
const displayReferences = [
{ namespace: "N", name: "G`1" },
{ namespace: "N", name: "Value" },
];
describe("readable signature operands", () => {
it("names fields, method returns and parameters, and member references", () => {
const result = inspectDisplayFixture({
fieldSignature: Buffer.from([0x06, 0x12, 0x04]),
methodSignature: Buffer.from([0x00, 0x01, 0x12, 0x04, 0x11, 0x09]),
memberRefSignature: Buffer.from([0x00, 0x01, 0x12, 0x09, 0x12, 0x04]),
typeReferences: displayReferences,
});
expect(result.signature_resolution).toBe("type-names-v2");
expect(result.fields[0]?.signature.field_type).toBe(
"class:4 (Fixture.Program)",
);
expect(result.methods[0]?.signature).toMatchObject({
return_type: "class:4 (Fixture.Program)",
parameter_types: ["valuetype:9 (N.G`1)"],
});
expect(result.member_refs[0]?.signature).toMatchObject({
return_type: "class:9 (N.G`1)",
parameter_types: ["class:4 (Fixture.Program)"],
});
expect(result.coverage).toEqual({ state: "complete", issues: [] });
});
it.each([
["class", [0x12, 0x09], "class:9 (N.G`1)"],
["value type", [0x11, 0x0d], "valuetype:13 (N.Value)"],
["pointer", [0x0f, 0x12, 0x09], "class:9 (N.G`1)*"],
["byref", [0x10, 0x12, 0x09], "class:9 (N.G`1)&"],
["vector", [0x1d, 0x12, 0x09], "class:9 (N.G`1)[]"],
[
"ranked array",
[0x14, 0x12, 0x09, 0x02, 0x00, 0x00],
"class:9 (N.G`1)[,]",
],
[
"required modifier",
[0x1f, 0x0d, 0x12, 0x09],
"class:9 (N.G`1) modreq:13 (N.Value)",
],
[
"optional modifier",
[0x20, 0x0d, 0x12, 0x09],
"class:9 (N.G`1) modopt:13 (N.Value)",
],
[
"generic argument",
[0x15, 0x12, 0x09, 0x01, 0x11, 0x0d],
"class:9 (N.G`1)<valuetype:13 (N.Value)>",
],
[
"generic variable",
[0x15, 0x12, 0x09, 0x01, 0x13, 0x00],
"class:9 (N.G`1)<var:0>",
],
[
"function pointer",
[0x1b, 0x00, 0x01, 0x12, 0x09, 0x11, 0x0d],
"fnptr[default](valuetype:13 (N.Value))->class:9 (N.G`1)",
],
[
"mixed resolved and unresolved",
[0x15, 0x12, 0x09, 0x01, 0x12, 0x06],
"class:9 (N.G`1)<class:6>",
],
])("preserves %s grammar and signature hashes", (_label, type, expected) => {
const blob = Buffer.from([0x06, ...(type as number[])]);
const result = inspectDisplayFixture({
fieldSignature: blob,
typeReferences: displayReferences,
});
const decoded = result.fields[0]?.signature;
const names = named({ 9: "N.G`1", 13: "N.Value" });
const original = signature(blob, undefined, names);
expect(decoded?.field_type).toBe(expected);
expect(decoded?.parse_status).toBe(original.parse_status);
expect(decoded?.raw_sha256).toBe(original.raw_sha256);
expect(decoded?.resolved_sha256).toBe(original.resolved_sha256);
});
});
describe("signature display name validity", () => {
it("resolves types outside the selected type inventory", () => {
const result = inspectDisplayFixture({
additionalEmptyTypes: 1,
fieldSignature: Buffer.from([0x06, 0x12, 0x04]),
});
expect(result.fields[0]?.signature.field_type).toBe(
"class:4 (Fixture.Empty0)",
);
const bytes = buildManagedPeFixture({
additionalEmptyTypes: 1,
fieldSignature: Buffer.from([0x06, 0x12, 0x04]),
});
const selected = inspectManagedMembersBytes(
bytes,
managedPeFixtureTarget(bytes),
{ typeNames: ["Fixture.Program"] },
);
expect(selected.fields[0]?.signature).toEqual(result.fields[0]?.signature);
});
it("uses the enclosing path for nested TypeDefs", () => {
const result = inspectDisplayFixture({
additionalEmptyTypes: 1,
nestedTypes: [[2, 1]],
fieldSignature: Buffer.from([0x06, 0x12, 0x08]),
});
expect(result.fields[0]?.signature.field_type).toBe(
"class:8 (Fixture.Empty0/Fixture.Program)",
);
});
it("uses the enclosing path for nested TypeRefs", () => {
const result = inspectDisplayFixture({
typeReferences: [
{ namespace: "N", name: "Outer" },
{ namespace: "", name: "Inner", enclosingRow: 2 },
],
fieldSignature: Buffer.from([0x06, 0x12, 0x0d]),
});
expect(result.fields[0]?.signature.field_type).toBe(
"class:13 (N.Outer/Inner)",
);
});
it.each(["", "名", "A.B", "G`1", "A (B)<C>/D", "\uFEFFName"])(
"preserves source name %j",
(name) => {
const result = inspectDisplayFixture({
typeReferences: [{ namespace: "", name }],
fieldSignature: Buffer.from([0x06, 0x12, 0x09]),
});
expect(result.fields[0]?.signature.field_type).toBe(`class:9 (${name})`);
},
);
it.each([
["TypeSpec", 0x06, "class:6", "decoded"],
["missing TypeRef", 0x25, null, "malformed"],
["missing TypeDef", 0x24, null, "malformed"],
["invalid tag", 0x07, null, "malformed"],
["null TypeDef", 0x00, null, "malformed"],
] as const)(
"preserves validity of unresolved %s operands",
(_label, operand, display, status) => {
const result = inspectDisplayFixture({
fieldSignature: Buffer.from([0x06, 0x12, operand]),
});
expect(result.fields[0]?.signature.field_type).toBe(display);
expect(result.fields[0]?.signature.parse_status).toBe(status);
expect(result.fields[0]?.signature.resolved_sha256).toBeNull();
},
);
it("keeps invalid-scope TypeRefs raw and retains their issue once", () => {
const result = inspectDisplayFixture({
typeRefScopeRaw: (99 << 2) | 2,
fieldSignature: Buffer.from([0x06, 0x12, 0x05]),
methodSignature: Buffer.from([0x00, 0x01, 0x12, 0x05, 0x12, 0x05]),
});
expect(result.fields[0]?.signature.field_type).toBe("class:5");
expect(result.methods[0]?.signature.parameter_types).toEqual(["class:5"]);
expect(result.coverage.issues).toHaveLength(1);
});
it("keeps cyclic TypeRefs raw", () => {
const result = inspectDisplayFixture({
typeReferences: [
{ namespace: "", name: "A", enclosingRow: 3 },
{ namespace: "", name: "B", enclosingRow: 2 },
],
fieldSignature: Buffer.from([0x06, 0x12, 0x09]),
});
expect(result.fields[0]?.signature.field_type).toBe("class:9");
expect(result.coverage.state).toBe("partial");
});
it.each([
["truncated", [0x06, 0x12], "malformed"],
["truncated compressed index", [0x06, 0x12, 0x80], "malformed"],
["unknown element", [0x06, 0x50], "unsupported"],
["trailing bytes", [0x06, 0x12, 0x04, 0x08], "partial"],
])("retains %s parse status and raw hash", (_label, bytes, status) => {
const blob = Buffer.from(bytes as number[]);
const result = inspectDisplayFixture({ fieldSignature: blob });
expect(result.fields[0]?.signature.parse_status).toBe(status);
expect(result.fields[0]?.signature.raw_sha256).toBe(
createHash("sha256").update(blob).digest("hex"),
);
});
});
describe("signature display compatibility and capacity", () => {
it("reads historical v1 Evidence without relabelling its raw display", () => {
const current = inspectDisplayFixture({
fieldSignature: Buffer.from([0x06, 0x12, 0x04]),
});
const old = {
...current,
signature_resolution: "type-names-v1",
fields: current.fields.map((field) => ({
...field,
signature: { ...field.signature, field_type: "class:4" },
})),
};
const parsed = managedMemberInspectionSchema.parse(old);
const comparison = compareManagedMembers(
{ evidenceId: `ev_${"a".repeat(64)}`, result: parsed },
{ evidenceId: `ev_${"b".repeat(64)}`, result: current },
);
expect(comparison.fields[0]?.status).toBe("unchanged");
expect(comparison.methods[0]?.status).toBe("unchanged");
expect(parsed.signature_resolution).toBe("type-names-v1");
expect(parsed.fields[0]?.signature.field_type).toBe("class:4");
expect(parsed.fields[0]?.signature.resolved_sha256).toBe(
current.fields[0]?.signature.resolved_sha256,
);
});
it.each([64, 65])("bounds a real %i-level TypeRef display path", (depth) => {
const typeReferences = Array.from({ length: depth }, (_, index) => ({
namespace: "",
name: `T${index}`,
...(index === 0 ? {} : { enclosingRow: index + 1 }),
}));
const index = ((depth + 1) << 2) | 1;
const encoded = [0x80 | (index >> 8), index & 0xff];
const result = inspectDisplayFixture({
typeReferences,
fieldSignature: Buffer.from([0x06, 0x12, ...encoded]),
});
const expected =
depth === 64
? `class:${index} (${typeReferences.map((ref) => ref.name).join("/")})`
: `class:${index}`;
expect(result.fields[0]?.signature.field_type).toBe(expected);
});
it("bounds repeated display-name expansion before allocation", () => {
const bytes = buildManagedPeFixture({
typeReferences: [{ namespace: "N", name: "X".repeat(200_000) }],
methodSignature: Buffer.from([
0x00,
0x40,
0x01,
...Array.from({ length: 64 }, () => [0x12, 0x09]).flat(),
]),
});
const result = inspectManagedMembersBytes(
bytes,
managedPeFixtureTarget(bytes),
);
expect(result.coverage.state).not.toBe("complete");
expect(result.coverage.issues).toEqual(
expect.arrayContaining([
expect.objectContaining({ code: "resource-limit" }),
]),
);
});
});
describe("signature display property regressions", () => {
const assertIdentity = (blob: Buffer) => {
const digest = ({ value }: Parameters<SignatureTypeName>[0]) =>
nameDigest(`N.Type${value}`);
const old = signature(blob, undefined, digest);
const current = signature(
blob,
undefined,
digest,
({ value }) => `N.Type${value}`,
);
const identity = ({
field_type: _field,
parameter_types: _parameters,
return_type: _return,
...rest
}: typeof old) => rest;
expect(identity(current)).toEqual(identity(old));
};
it("keeps parse status, hashes and counts for 1000 arbitrary blobs", () => {
fc.assert(
fc.property(fc.uint8Array({ maxLength: 128 }), (bytes) => {
assertIdentity(Buffer.from(bytes));
}),
{ seed: 5149, numRuns: 1000 },
);
});
it("keeps identity through 1000 generated valid nested signatures", () => {
fc.assert(
fc.property(
fc.array(
fc.constantFrom(
"pointer",
"vector",
"array",
"generic",
"modifier",
"fnptr",
),
{ maxLength: 30 },
),
fc.constantFrom([0x12, 0x09], [0x11, 0x0d], [0x08]),
(wrappers, leaf) => {
let type: number[] = [...leaf];
for (const wrapper of wrappers) {
if (wrapper === "pointer") type = [0x0f, ...type];
else if (wrapper === "vector") type = [0x1d, ...type];
else if (wrapper === "array")
type = [0x14, ...type, 0x02, 0x00, 0x00];
else if (wrapper === "generic")
type = [0x15, 0x12, 0x09, 0x01, ...type];
else if (wrapper === "modifier") type = [0x1f, 0x0d, ...type];
else type = [0x1b, 0x00, 0x00, ...type];
}
const blob = Buffer.from([0x06, ...type]);
expect(signature(blob).parse_status).toBe("decoded");
assertIdentity(blob);
},
),
{ seed: 5149, numRuns: 1000 },
);
});
});