================
@@ -434,3 +434,70 @@ TEST_F(MemoryDeathTest,
TestReadMemoryRangesWithShortBuffer) {
ASSERT_TRUE(result.empty());
#endif
}
+
+/// A process class whose memory contains the following map of addresses to
+/// strings:
+/// 100 -> "hello\0"
+/// 200 -> "\0"
+/// 201 -> "goodbye"
+/// 300 -> a string composed of 500 'c' characters, followed by '\0'.
+class StringReaderProcess : public Process {
+public:
+ char memory[1024];
+ void initialize_memory() {
+ // Use some easily identifiable character for the areas of memory we're not
+ // intending to read.
+ memset(memory, '?', 1024);
+ strcpy(&memory[100], "hello");
+ strcpy(&memory[200], "");
+ strcpy(&memory[201], "goodbye");
+ std::vector<char> long_str(500, 'c');
+ long_str.push_back('\0');
+ strcpy(&memory[300], long_str.data());
+ }
+
+ size_t DoReadMemory(lldb::addr_t vm_addr, void *buf, size_t size,
+ Status &error) override {
+ memcpy(buf, memory + vm_addr, size);
+ return size;
+ }
+ StringReaderProcess(lldb::TargetSP target_sp, lldb::ListenerSP listener_sp)
+ : Process(target_sp, listener_sp) {
+ initialize_memory();
+ }
+ // Boilerplate, nothing interesting below.
+ bool CanDebug(lldb::TargetSP, bool) override { return true; }
+ Status DoDestroy() override { return {}; }
+ void RefreshStateAfterStop() override {}
+ bool DoUpdateThreadList(ThreadList &, ThreadList &) override { return false;
}
+ llvm::StringRef GetPluginName() override { return "Dummy"; }
+};
+
+TEST_F(MemoryTest, TestReadCStringsFromMemory) {
+ ArchSpec arch("x86_64-apple-macosx-");
+ Platform::SetHostPlatform(PlatformRemoteMacOSX::CreateInstance(true, &arch));
+ DebuggerSP debugger_sp = Debugger::CreateInstance();
+ ASSERT_TRUE(debugger_sp);
+ TargetSP target_sp = CreateTarget(debugger_sp, arch);
+ ASSERT_TRUE(target_sp);
+ ListenerSP listener_sp(Listener::MakeListener("dummy"));
+ ProcessSP process_sp =
+ std::make_shared<StringReaderProcess>(target_sp, listener_sp);
+ ASSERT_TRUE(process_sp);
+
+ // See the docs for StringReaderProcess above for an explanation of these
+ // addresses.
+ llvm::SmallVector<std::optional<std::string>> maybe_strings =
+ process_sp->ReadCStringsFromMemory({100, 200, 201, 300});
+
+ std::vector<char> long_str(500, 'c');
+ long_str.push_back('\0');
+ std::string big_str(long_str.data());
+
+ const std::string expected_answers[4] = {"hello", "", "goodbye", big_str};
+ for (auto [maybe_str, expected_answer] :
+ llvm::zip(maybe_strings, expected_answers)) {
+ EXPECT_TRUE(maybe_str);
+ EXPECT_EQ(*maybe_str, expected_answer);
----------------
felipepiovezan wrote:
Done!
https://github.com/llvm/llvm-project/pull/172026
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