Disable assertions during coverage builds

This removes roughly 5000 branches in my testing. We never want to
trigger assertions even during tests, so this is sane. Implements #15400.

src/common/include.am

@@ -96,9 +96,9 @@ src_common_libor_testing_a_SOURCES = $(LIBOR_A_SOURCES)
 src_common_libor_crypto_testing_a_SOURCES = $(LIBOR_CRYPTO_A_SOURCES)
 src_common_libor_event_testing_a_SOURCES = $(LIBOR_EVENT_A_SOURCES)
 
-src_common_libor_testing_a_CPPFLAGS = -DTOR_UNIT_TESTS $(AM_CPPFLAGS)
-src_common_libor_crypto_testing_a_CPPFLAGS = -DTOR_UNIT_TESTS $(AM_CPPFLAGS)
-src_common_libor_event_testing_a_CPPFLAGS = -DTOR_UNIT_TESTS $(AM_CPPFLAGS)
+src_common_libor_testing_a_CPPFLAGS = $(AM_CPPFLAGS) $(TEST_CPPFLAGS)
+src_common_libor_crypto_testing_a_CPPFLAGS = $(AM_CPPFLAGS) $(TEST_CPPFLAGS)
+src_common_libor_event_testing_a_CPPFLAGS = $(AM_CPPFLAGS) $(TEST_CPPFLAGS)
 src_common_libor_testing_a_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
 src_common_libor_crypto_testing_a_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
 src_common_libor_event_testing_a_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)

src/common/util.h

@@ -45,6 +45,13 @@
 #error "Sorry; we don't support building with NDEBUG."
 #endif
 
+/* Don't use assertions during coverage. It leads to tons of unreached
+ * branches which in reality are only assertions we didn't hit. */
+#ifdef TOR_COVERAGE
+#define tor_assert(a) STMT_BEGIN                                        \
+  (void)(a);                                                            \
+  STMT_END
+#else
 /** Like assert(3), but send assertion failures to the log as well as to
  * stderr. */
 #define tor_assert(expr) STMT_BEGIN                                     \
@@ -52,6 +59,7 @@
     tor_assertion_failed_(SHORT_FILE__, __LINE__, __func__, #expr);     \
     abort();                                                            \
   } STMT_END
+#endif
 
 void tor_assertion_failed_(const char *fname, unsigned int line,
                            const char *func, const char *expr);

src/or/include.am

@@ -99,7 +99,7 @@ AM_CPPFLAGS += -DSHARE_DATADIR="\"$(datadir)\"" \
         -DLOCALSTATEDIR="\"$(localstatedir)\"" \
         -DBINDIR="\"$(bindir)\""
 
-src_or_libtor_testing_a_CPPFLAGS = -DTOR_UNIT_TESTS $(AM_CPPFLAGS)
+src_or_libtor_testing_a_CPPFLAGS = $(AM_CPPFLAGS) $(TEST_CPPFLAGS)
 src_or_libtor_testing_a_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
 
 # -L flags need to go in LDFLAGS. -l flags need to go in LDADD.
@@ -116,7 +116,7 @@ src_or_tor_LDADD = src/or/libtor.a src/common/libor.a \
 
 if COVERAGE_ENABLED
 src_or_tor_cov_SOURCES = src/or/tor_main.c
-src_or_tor_cov_CPPFLAGS = -DTOR_UNIT_TESTS $(AM_CPPFLAGS)
+src_or_tor_cov_CPPFLAGS = $(AM_CPPFLAGS) $(TEST_CPPFLAGS)
 src_or_tor_cov_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
 src_or_tor_cov_LDFLAGS = @TOR_LDFLAGS_zlib@ @TOR_LDFLAGS_openssl@ @TOR_LDFLAGS_libevent@
 src_or_tor_cov_LDADD = src/or/libtor-testing.a src/common/libor-testing.a \

src/test/include.am

@@ -76,7 +76,7 @@ src_test_test_slow_SOURCES = \
 
 src_test_test_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
 
-src_test_test_CPPFLAGS= $(src_test_AM_CPPFLAGS)
+src_test_test_CPPFLAGS= $(src_test_AM_CPPFLAGS) $(TEST_CPPFLAGS)
 
 src_test_bench_SOURCES = \
 	src/test/bench.c
@@ -151,7 +151,7 @@ src_test_test_bt_cl_LDADD = src/common/libor-testing.a \
 	@TOR_LIB_MATH@ \
 	@TOR_LIB_WS32@ @TOR_LIB_GDI@
 src_test_test_bt_cl_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
-src_test_test_bt_cl_CPPFLAGS= $(src_test_AM_CPPFLAGS)
+src_test_test_bt_cl_CPPFLAGS= $(src_test_AM_CPPFLAGS) $(TEST_CPPFLAGS)
 
 
 check-local: $(NTOR_TEST_DEPS) $(CMDLINE_TEST_TOR)

src/trunnel/include.am

@@ -23,7 +23,7 @@ src_trunnel_libor_trunnel_a_SOURCES = $(TRUNNELSOURCES)
 src_trunnel_libor_trunnel_a_CPPFLAGS = -DTRUNNEL_LOCAL_H $(AM_CPPFLAGS)
 
 src_trunnel_libor_trunnel_testing_a_SOURCES = $(TRUNNELSOURCES)
-src_trunnel_libor_trunnel_testing_a_CPPFLAGS = -DTOR_UNIT_TESTS -DTRUNNEL_LOCAL_H $(AM_CPPFLAGS)
+src_trunnel_libor_trunnel_testing_a_CPPFLAGS = -DTRUNNEL_LOCAL_H $(AM_CPPFLAGS) $(TEST_CPPFLAGS)
 src_trunnel_libor_trunnel_testing_a_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
 
 noinst_HEADERS+= $(TRUNNELHEADERS)