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//: Automatically aggregate functions starting with 'test-' into a test suite
//: called 'run-tests'. Running this function will run all tests.
//:
//: This is actually SubX's first (trivial) compiler. We generate all the code
//: needed for the 'run-tests' function.
//:
//: By convention, temporary functions needed by tests will start with
//: '_test-'.
//: We don't rely on any transforms running in previous layers, but this layer
//: knows about labels and will emit labels for previous layers to transform.
:(after "Begin Transforms")
// Begin Level-4 Transforms
Transform.push_back(create_test_function);
// End Level-4 Transforms
:(code)
void test_run_test() {
Mem.push_back(vma(0xbd000000)); // manually allocate memory
Reg[ESP].u = 0xbd000100;
run(
"== code 0x1\n" // code segment
"main:\n"
" e8/call run-tests/disp32\n" // 5 bytes
" f4/halt\n" // 1 byte
"test-foo:\n" // offset 7
" 01 d8\n" // just some unique instruction: add EBX to EAX
" c3/return\n"
);
// check that code in test-foo ran (implicitly called by run-tests)
CHECK_TRACE_CONTENTS(
"run: 0x00000007 opcode: 01\n"
);
}
void create_test_function(program& p) {
if (p.segments.empty()) return;
segment& code = *find(p, "code");
trace(3, "transform") << "-- create 'run-tests'" << end();
vector<line> new_insts;
for (int i = 0; i < SIZE(code.lines); ++i) {
line& inst = code.lines.at(i);
for (int j = 0; j < SIZE(inst.words); ++j) {
const word& curr = inst.words.at(j);
if (*curr.data.rbegin() != ':') continue; // not a label
if (!starts_with(curr.data, "test-")) continue;
string fn = drop_last(curr.data);
new_insts.push_back(call(fn));
}
}
if (new_insts.empty()) return; // no tests found
code.lines.push_back(label("run-tests"));
code.lines.insert(code.lines.end(), new_insts.begin(), new_insts.end());
code.lines.push_back(ret());
}
string to_string(const segment& s) {
ostringstream out;
for (int i = 0; i < SIZE(s.lines); ++i) {
const line& l = s.lines.at(i);
for (int j = 0; j < SIZE(l.words); ++j) {
if (j > 0) out << ' ';
out << to_string(l.words.at(j));
}
out << '\n';
}
return out.str();
}
line call(string s) {
line result;
result.words.push_back(call());
result.words.push_back(disp32(s));
return result;
}
word call() {
word result;
result.data = "e8";
result.metadata.push_back("call");
return result;
}
word disp32(string s) {
word result;
result.data = s;
result.metadata.push_back("disp32");
return result;
}
line ret() {
line result;
result.words.push_back(word());
result.words.back().data = "c3";
result.words.back().metadata.push_back("return");
return result;
}
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