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Code Issues Releases Wiki Activity

common: Don't test ASSERT conditions inline

merge-requests/60/head
Liam 2022-06-07 18:05:32 +07:00
parent 084d7d6b01
commit 58fea44eb5
2 changed files with 36 additions and 32 deletions
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10
src/common/assert.cpp
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@ -6,9 +6,13 @@
#include "common/settings.h"
void assert_handle_failure() {
if (Settings::values.use_debug_asserts) {
Crash();
void assert_check_condition(bool cond, std::function<void()>&& on_failure) {
if (!cond) {
on_failure();
if (Settings::values.use_debug_asserts) {
Crash();
}
}
}

58
src/common/assert.h
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@ -4,57 +4,57 @@
#pragma once
#include <functional>
#include "common/logging/log.h"
// Sometimes we want to try to continue even after hitting an assert.
// However touching this file yields a global recompilation as this header is included almost
// everywhere. So let's just move the handling of the failed assert to a single cpp file.
void assert_handle_failure();
[[noreturn]] void unreachable_impl();
// For asserts we'd like to keep all the junk executed when an assert happens away from the
// important code in the function. One way of doing this is to put all the relevant code inside a
// lambda and force the compiler to not inline it. Unfortunately, MSVC seems to have no syntax to
// specify __declspec on lambda functions, so what we do instead is define a noinline wrapper
// template that calls the lambda. This seems to generate an extra instruction at the call-site
// compared to the ideal implementation (which wouldn't support ASSERT_MSG parameters), but is good
// enough for our purposes.
template <typename Fn>
#if defined(_MSC_VER)
[[msvc::noinline]]
#elif defined(__GNUC__)
[[gnu::cold, gnu::noinline]]
#endif
static void
assert_noinline_call(const Fn& fn) {
fn();
assert_handle_failure();
}
// lambda and force the compiler to not inline it.
void assert_check_condition(bool cond, std::function<void()>&& on_failure);
[[noreturn]] void unreachable_impl();
#define ASSERT(_a_) \
do \
if (!(_a_)) { \
assert_noinline_call([] { LOG_CRITICAL(Debug, "Assertion Failed!"); }); \
do { \
if (std::is_constant_evaluated()) { \
if (!(_a_)) { \
/* Will trigger compile error here */ \
assert_check_condition(bool(_a_), \
[] { LOG_CRITICAL(Debug, "Assertion Failed!"); }); \
} \
} else { \
assert_check_condition(bool(_a_), [] { LOG_CRITICAL(Debug, "Assertion Failed!"); }); \
} \
while (0)
} while (0)
#define ASSERT_MSG(_a_, ...) \
do \
if (!(_a_)) { \
assert_noinline_call([&] { LOG_CRITICAL(Debug, "Assertion Failed!\n" __VA_ARGS__); }); \
do { \
if (std::is_constant_evaluated()) { \
if (!(_a_)) { \
/* Will trigger compile error here */ \
assert_check_condition(bool(_a_), \
[] { LOG_CRITICAL(Debug, "Assertion Failed!"); }); \
} \
} else { \
assert_check_condition( \
bool(_a_), [&] { LOG_CRITICAL(Debug, "Assertion Failed!\n" __VA_ARGS__); }); \
} \
while (0)
} while (0)
#define UNREACHABLE() \
do { \
assert_noinline_call([] { LOG_CRITICAL(Debug, "Unreachable code!"); }); \
LOG_CRITICAL(Debug, "Unreachable code!"); \
unreachable_impl(); \
} while (0)
#define UNREACHABLE_MSG(...) \
do { \
assert_noinline_call([&] { LOG_CRITICAL(Debug, "Unreachable code!\n" __VA_ARGS__); }); \
LOG_CRITICAL(Debug, "Unreachable code!\n" __VA_ARGS__); \
unreachable_impl(); \
} while (0)