mirror of
https://github.com/ApfelTeeSaft/RebrewU.git
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103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
#include <catch2/catch_test_macros.hpp>
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#include "core/rpx/rpx_types.hpp"
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#include "core/linker/linker.hpp"
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#include "analysis/function_discovery.hpp"
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#include "analysis/cfg_builder.hpp"
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#include "diagnostics/diagnostics.hpp"
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using namespace rebrewu;
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// ============================================================================
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// Helpers: build a minimal synthetic RpxModule with a small code section
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// ============================================================================
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static rpx::RpxModule make_test_module() {
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rpx::RpxModule mod;
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mod.name = "test";
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mod.entry_point = 0x0200'0000;
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rpx::RpxSection text;
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text.name = ".text";
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text.address = 0x0200'0000;
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text.flags = rebrewu::elf::SHF_ALLOC | rebrewu::elf::SHF_EXECINSTR;
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text.type = rebrewu::elf::SHT_PROGBITS;
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// A tiny function:
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// mflr r0 0x7C0802A6
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// stw r0, 4(r1) 0x90010004
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// blr 0x4E800020
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std::array<uint8_t, 12> code = {
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0x7C, 0x08, 0x02, 0xA6, // mflr r0
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0x90, 0x01, 0x00, 0x04, // stw r0, 4(r1)
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0x4E, 0x80, 0x00, 0x20 // blr
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};
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text.data.assign(code.begin(), code.end());
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text.size = static_cast<uint32_t>(text.data.size());
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mod.sections.push_back(std::move(text));
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// Add an export pointing at entry
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rpx::RpxExport exp;
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exp.address = 0x0200'0000;
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exp.name = "entry";
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mod.exports.push_back(std::move(exp));
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return mod;
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}
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// ============================================================================
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// FunctionDiscovery tests
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// ============================================================================
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TEST_CASE("FunctionDiscovery finds entry via export", "[function_discovery]") {
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diagnostics::DiagEngine diag;
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linker::Linker lnk(diag);
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auto mod = make_test_module();
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analysis::FunctionDiscovery::Config cfg;
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analysis::FunctionDiscovery disc(mod, lnk, cfg);
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auto bounds = disc.discover();
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REQUIRE_FALSE(bounds.empty());
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bool found_entry = false;
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for (const auto& b : bounds)
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if (b.start == 0x0200'0000) found_entry = true;
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REQUIRE(found_entry);
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}
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TEST_CASE("FunctionDiscovery::add_hint adds a forced candidate", "[function_discovery]") {
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diagnostics::DiagEngine diag;
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linker::Linker lnk(diag);
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auto mod = make_test_module();
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analysis::FunctionDiscovery::Config cfg;
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analysis::FunctionDiscovery disc(mod, lnk, cfg);
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disc.add_hint({0x0200'0004, "inner", true});
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auto bounds = disc.discover();
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bool found = false;
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for (const auto& b : bounds)
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if (b.start == 0x0200'0004) found = true;
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REQUIRE(found);
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}
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// ============================================================================
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// CFGBuilder tests
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// ============================================================================
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TEST_CASE("CFGBuilder builds a function with one return block", "[cfg_builder]") {
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auto mod = make_test_module();
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analysis::CFGBuilder builder(mod);
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auto func = builder.build(0x0200'0000, "entry");
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REQUIRE(func.has_value());
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REQUIRE_FALSE(func->empty());
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REQUIRE(func->name == "entry");
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}
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TEST_CASE("CFGBuilder fails gracefully on non-code address", "[cfg_builder]") {
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rpx::RpxModule empty_mod;
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analysis::CFGBuilder builder(empty_mod);
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auto func = builder.build(0xDEAD'BEEF, "bad");
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REQUIRE_FALSE(func.has_value());
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}
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