From ae0b3149badf369eb2b1f10aba830eef8b4af9b4 Mon Sep 17 00:00:00 2001 From: Nat Goodspeed Date: Thu, 23 Feb 2017 16:49:49 -0500 Subject: DRTVWR-418: Fix a round of compile errors surfaced by -std=c++11. These are mostly things that were in fact erroneous, but accepted by older compilers. This changeset has not yet been built with Visual Studio 2013 or Linux gcc, even with -std=c++11. This changeset has not been built *without* -std=c++11. It should be used in conjunction with a corresponding change to LL_BUILD_DARWIN_BASE_SWITCHES in viewer-build-variables/variables. This is a work in progress. We do not assert that this changeset completes the work needed to turn on -std=c++11, even on the Mac. --- indra/llcommon/lleventdispatcher.h | 4 ++-- indra/llcommon/llpreprocessor.h | 10 +++------- indra/llcommon/tests/llsdserialize_test.cpp | 2 +- 3 files changed, 6 insertions(+), 10 deletions(-) (limited to 'indra/llcommon') diff --git a/indra/llcommon/lleventdispatcher.h b/indra/llcommon/lleventdispatcher.h index 7acc61de4e..9e1244ef5b 100644 --- a/indra/llcommon/lleventdispatcher.h +++ b/indra/llcommon/lleventdispatcher.h @@ -47,13 +47,13 @@ // namespace) that a global 'nil' macro breaks badly. #if defined(nil) // Capture the value of the macro 'nil', hoping int is an appropriate type. -static const int nil_(nil); +static const auto nil_(nil); // Now forget the macro. #undef nil // Finally, reintroduce 'nil' as a properly-scoped alias for the previously- // defined const 'nil_'. Make it static since otherwise it produces duplicate- // symbol link errors later. -static const int& nil(nil_); +static const auto& nil(nil_); #endif #include diff --git a/indra/llcommon/llpreprocessor.h b/indra/llcommon/llpreprocessor.h index 3698d9db44..2879038c36 100644 --- a/indra/llcommon/llpreprocessor.h +++ b/indra/llcommon/llpreprocessor.h @@ -192,13 +192,9 @@ # define LL_COMMON_API #endif // LL_COMMON_LINK_SHARED -#if LL_WINDOWS -#define LL_TYPEOF(exp) decltype(exp) -#elif LL_LINUX -#define LL_TYPEOF(exp) typeof(exp) -#elif LL_DARWIN -#define LL_TYPEOF(exp) typeof(exp) -#endif +// With C++11, decltype() is standard. We no longer need a platform-dependent +// macro to get the type of an expression. +#define LL_TYPEOF(expr) decltype(expr) #define LL_TO_STRING_HELPER(x) #x #define LL_TO_STRING(x) LL_TO_STRING_HELPER(x) diff --git a/indra/llcommon/tests/llsdserialize_test.cpp b/indra/llcommon/tests/llsdserialize_test.cpp index 81b930e1e2..8836230640 100644 --- a/indra/llcommon/tests/llsdserialize_test.cpp +++ b/indra/llcommon/tests/llsdserialize_test.cpp @@ -1553,7 +1553,7 @@ namespace tut params.executable = PYTHON; params.args.add(scriptfile.getName()); LLProcessPtr py(LLProcess::create(params)); - ensure(STRINGIZE("Couldn't launch " << desc << " script"), py); + ensure(STRINGIZE("Couldn't launch " << desc << " script"), bool(py)); // Implementing timeout would mean messing with alarm() and // catching SIGALRM... later maybe... int status(0); -- cgit v1.2.3 From 322c4c6bec54b4968d0105cf1bb28bb62c6dfcbc Mon Sep 17 00:00:00 2001 From: Nat Goodspeed Date: Mon, 8 May 2017 09:09:22 -0400 Subject: DRTVWR-418: Fix -std=c++11 llinstancetracker_test crash. LLInstanceTracker performs validation in ~LLInstanceTracker(). Normally validation failure logs an error and terminates the program, which is fine. In the test executable, though, we want validation failure to throw an exception instead so we can catch it and continue testing other failure conditions. But since destructors in C++11 are implicitly noexcept(true), that exception never made it out of ~LLInstanceTracker(): it crashed the test program instead. Declaring ~LLInstanceTracker() noexcept(false) solves that, allowing the test program to catch the exception and continue. However, if we unconditionally declare that, then every destructor anywhere in the inheritance hierarchy for any LLInstanceTracker subclass must also be noexcept(false)! That's way too pervasive, especially for functionality we only need (or want) in a specific test executable. Instead, make the CMake macros LL_ADD_PROJECT_UNIT_TESTS() and LL_ADD_INTEGRATION_TEST() -- with which we define all viewer build-time tests -- define two new command-line macros: LL_TEST=testname and LL_TEST_testname. That way, preprocessor logic in a header file can detect whether it's being compiled for production code or for a test executable. (While at it, encapsulate in a new GET_OPT_SOURCE_FILE_PROPERTY() CMake macro an ugly repetitive pattern. The builtin GET_SOURCE_FILE_PROPERTY() sets the target variable to "NOTFOUND" -- rather than an empty string -- if the specified property wasn't set. Every call to GET_SOURCE_FILE_PROPERTY() in LL_ADD_PROJECT_UNIT_TESTS() was followed by a test for NOTFOUND and an assignment to "". Wrap all that in a macro whose 'unset' value is "".) Now llinstancetracker.h can detect when we're building the LLInstanceTracker unit test executable, and *only then* declare ~LLInstanceTracker() as noexcept(false). We #define LLINSTANCETRACKER_DTOR_NOEXCEPT to expand either empty or noexcept(false), also detecting clang in C++11 mode. (It all works fine without noexcept(false) until we turn on C++11 mode.) We also use that macro for the StatBase class in lltrace.h. Turns out some of the infrastructure headers required for tests in general, including the LLInstanceTracker test, use LLInstanceTracker. Fortunately that appears to be the only other class we must annotate this way for the LLInstanceTracker tests. --- indra/llcommon/llinstancetracker.h | 24 +++++++++++++++++++++--- indra/llcommon/lltrace.h | 2 +- 2 files changed, 22 insertions(+), 4 deletions(-) (limited to 'indra/llcommon') diff --git a/indra/llcommon/llinstancetracker.h b/indra/llcommon/llinstancetracker.h index 9783644e66..69c712b656 100644 --- a/indra/llcommon/llinstancetracker.h +++ b/indra/llcommon/llinstancetracker.h @@ -35,6 +35,24 @@ #include #include +// As of 2017-05-06, as far as nat knows, only clang supports __has_feature(). +#if defined(LL_TEST_llinstancetracker) && defined(__clang__) && __has_feature(cxx_noexcept) +// ~LLInstanceTracker() performs llassert_always() validation. That's fine in +// production code, since the llassert_always() is implemented as an LL_ERRS +// message, which will crash-with-message. In our integration test executable, +// though, this llassert_always() throws an exception instead so we can test +// error conditions and continue running the test. However -- as of C++11, +// destructors are implicitly noexcept(true). Unless we mark +// ~LLInstanceTracker() noexcept(false), the test executable crashes even on +// the ATTEMPT to throw. +#define LLINSTANCETRACKER_DTOR_NOEXCEPT noexcept(false) +#else +// If we're building for production, or in fact building *any other* test, or +// we're using a compiler that doesn't support __has_feature(), or we're not +// compiling with a C++ version that supports noexcept -- don't specify it. +#define LLINSTANCETRACKER_DTOR_NOEXCEPT +#endif + /** * Base class manages "class-static" data that must actually have singleton * semantics: one instance per process, rather than one instance per module as @@ -198,11 +216,11 @@ protected: getStatic(); add_(key); } - virtual ~LLInstanceTracker() + virtual ~LLInstanceTracker() LLINSTANCETRACKER_DTOR_NOEXCEPT { // it's unsafe to delete instances of this type while all instances are being iterated over. llassert_always(getStatic().getDepth() == 0); - remove_(); + remove_(); } virtual void setKey(KEY key) { remove_(); add_(key); } virtual const KEY& getKey() const { return mInstanceKey; } @@ -335,7 +353,7 @@ protected: getStatic(); getSet_().insert(static_cast(this)); } - virtual ~LLInstanceTracker() + virtual ~LLInstanceTracker() LLINSTANCETRACKER_DTOR_NOEXCEPT { // it's unsafe to delete instances of this type while all instances are being iterated over. llassert_always(getStatic().getDepth() == 0); diff --git a/indra/llcommon/lltrace.h b/indra/llcommon/lltrace.h index 5f1289dad8..79ff55b739 100644 --- a/indra/llcommon/lltrace.h +++ b/indra/llcommon/lltrace.h @@ -57,7 +57,7 @@ class StatBase { public: StatBase(const char* name, const char* description); - virtual ~StatBase() {}; + virtual ~StatBase() LLINSTANCETRACKER_DTOR_NOEXCEPT {} virtual const char* getUnitLabel() const; const std::string& getName() const { return mName; } -- cgit v1.2.3