mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 06:53:33 +00:00
e3d28de8a6
When reading hexadecimal floats, cosmopolitan would previously sometimes
print a number of warnings relating to undefined behavior on left shift:
third_party/gdtoa/gethex.c:172: ubsan warning: signed left shift changed
sign bit or overflowed 12 'int' 28 'int' is undefined behavior
This is because gdtoa assumes left shifts are safe when overflow happens
even on signed integers - this is false: the C standard considers it UB.
This is easy to fix, by simply casting the shifted value to unsigned, as
doing so does not change the value or the semantics of the left shifting
(except for avoiding the undefined behavior, as the C standard specifies
that unsigned overflow yields wraparound, avoiding undefined behaviour).
This commit does this, and adds a testcase that previously triggered UB.
(this also adds test macros to test for exact float equality, instead of
the existing {EXPECT,ASSERT}_FLOAT_EQ macros which only tests inputs for
being "almost equal" (with a significant epsilon) whereas exact equality
makes more sense for certain things such as reading floats from strings,
and modifies other testcases for sscanf/fscanf of floats to utilize it).
240 lines
8.4 KiB
Makefile
240 lines
8.4 KiB
Makefile
#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
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#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
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# Description:
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# Cosmopolitan Testing Library.
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PKGS += LIBC_TESTLIB
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#───────────────────────────────────────────────────────────────────────────────
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LIBC_TESTLIB_ARTIFACTS += LIBC_TESTLIB_A
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LIBC_TESTLIB = $(LIBC_TESTLIB_A_DEPS) $(LIBC_TESTLIB_A)
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LIBC_TESTLIB_A = o/$(MODE)/libc/testlib/testlib.a
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LIBC_TESTLIB_A_CHECKS = $(LIBC_TESTLIB_A).pkg
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LIBC_TESTLIB_A_ASSETS = \
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libc/testlib/blake2b256_tests.txt \
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libc/testlib/blocktronics.txt \
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libc/testlib/viewables.txt \
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libc/testlib/hyperion.txt \
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libc/testlib/moby.txt
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LIBC_TESTLIB_A_HDRS = \
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libc/testlib/aspect.internal.h \
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libc/testlib/bench.h \
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libc/testlib/benchmark.h \
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libc/testlib/blocktronics.h \
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libc/testlib/ezbench.h \
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libc/testlib/fastrandomstring.h \
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libc/testlib/hyperion.h \
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libc/testlib/moby.h \
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libc/testlib/subprocess.h \
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libc/testlib/testlib.h \
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libc/testlib/viewables.h
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LIBC_TESTLIB_A_SRCS_S = \
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libc/testlib/bench.S \
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libc/testlib/blake2b256_tests.S \
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libc/testlib/blocktronics.S \
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libc/testlib/fixture.S \
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libc/testlib/hyperion.S \
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libc/testlib/moby.S \
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libc/testlib/polluteregisters.S \
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libc/testlib/testcase.S \
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libc/testlib/viewables.S
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LIBC_TESTLIB_A_SRCS_C = \
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libc/testlib/almostequallongdouble.c \
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libc/testlib/benchrunner.c \
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libc/testlib/binequals.c \
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libc/testlib/clearxmmregisters.c \
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libc/testlib/contains.c \
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libc/testlib/endswith.c \
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libc/testlib/exactlyequallongdouble.c \
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libc/testlib/extract.c \
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libc/testlib/ezbenchcontrol.c \
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libc/testlib/ezbenchreport.c \
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libc/testlib/ezbenchwarn.c \
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libc/testlib/fixturerunner.c \
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libc/testlib/formatbinaryasglyphs.c \
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libc/testlib/formatbinaryashex.c \
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libc/testlib/formatbool.c \
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libc/testlib/formatfloat.c \
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libc/testlib/formatint.c \
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libc/testlib/formatrange.c \
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libc/testlib/formatstr.c \
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libc/testlib/getcore.c \
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libc/testlib/geterrno.c \
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libc/testlib/getinterrupts.c \
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libc/testlib/globals.c \
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libc/testlib/hexequals.c \
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libc/testlib/incrementfailed.c \
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libc/testlib/memoryexists.c \
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libc/testlib/seterrno.c \
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libc/testlib/shoulddebugbreak.c \
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libc/testlib/showerror.c \
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libc/testlib/startswith.c \
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libc/testlib/strcaseequals.c \
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libc/testlib/strequals.c \
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libc/testlib/strerror.c \
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libc/testlib/testrunner.c \
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libc/testlib/thunks.c \
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libc/testlib/tmptest.c \
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libc/testlib/waitforexit.c \
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libc/testlib/waitforterm.c \
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libc/testlib/yield.c
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LIBC_TESTLIB_A_SRCS = \
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$(LIBC_TESTLIB_A_SRCS_S) \
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$(LIBC_TESTLIB_A_SRCS_C)
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LIBC_TESTLIB_A_OBJS = \
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$(LIBC_TESTLIB_A_SRCS_C:%.c=o/$(MODE)/%.o) \
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$(LIBC_TESTLIB_A_SRCS_S:%.S=o/$(MODE)/%.o) \
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$(LIBC_TESTLIB_A_ASSETS:%=o/$(MODE)/%.zip.o) \
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o/$(MODE)/libc/testlib-test.txt.zip.o
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LIBC_TESTLIB_A_DIRECTDEPS = \
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LIBC_CALLS \
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LIBC_FMT \
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LIBC_INTRIN \
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LIBC_LOG \
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LIBC_MEM \
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LIBC_NEXGEN32E \
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LIBC_NT_KERNEL32 \
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LIBC_PROC \
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LIBC_RUNTIME \
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LIBC_STDIO \
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LIBC_STR \
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LIBC_SYSV \
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LIBC_SYSV_CALLS \
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LIBC_TINYMATH \
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LIBC_X \
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THIRD_PARTY_COMPILER_RT \
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THIRD_PARTY_DLMALLOC \
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THIRD_PARTY_GDTOA \
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THIRD_PARTY_MUSL \
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THIRD_PARTY_TZ \
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THIRD_PARTY_XED \
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LIBC_TESTLIB_A_DEPS := \
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$(call uniq,$(foreach x,$(LIBC_TESTLIB_A_DIRECTDEPS),$($(x))))
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$(LIBC_TESTLIB_A): \
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libc/testlib/ \
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$(LIBC_TESTLIB_A).pkg \
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$(LIBC_TESTLIB_A_OBJS)
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$(LIBC_TESTLIB_A).pkg: \
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$(LIBC_TESTLIB_A_OBJS) \
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$(foreach x,$(LIBC_TESTLIB_A_DIRECTDEPS),$($(x)_A).pkg)
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o/$(MODE)/libc/testlib/blake2b256_tests.o: libc/testlib/blake2b256_tests.txt
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o/$(MODE)/libc/testlib/blocktronics.o: libc/testlib/blocktronics.txt
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o/$(MODE)/libc/testlib/viewables.o: libc/testlib/viewables.txt
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o/$(MODE)/libc/testlib/hyperion.o: libc/testlib/hyperion.txt
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o/$(MODE)/libc/testlib/moby.o: libc/testlib/moby.txt
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# these assembly files are safe to build on aarch64
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o/$(MODE)/libc/testlib/bench.o: libc/testlib/bench.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/blake2b256_tests.o: libc/testlib/blake2b256_tests.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/blocktronics.o: libc/testlib/blocktronics.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/fixture.o: libc/testlib/fixture.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/hyperion.o: libc/testlib/hyperion.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/moby.o: libc/testlib/moby.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/polluteregisters.o: libc/testlib/polluteregisters.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/testcase.o: libc/testlib/testcase.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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o/$(MODE)/libc/testlib/viewables.o: libc/testlib/viewables.S
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@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
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#───────────────────────────────────────────────────────────────────────────────
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LIBC_TESTLIB_ARTIFACTS += LIBC_TESTLIB_RUNNER_A
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LIBC_TESTLIB_RUNNER = $(LIBC_TESTLIB_RUNNER_A_DEPS) $(LIBC_TESTLIB_RUNNER_A)
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LIBC_TESTLIB_RUNNER_A = o/$(MODE)/libc/testlib/runner.a
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LIBC_TESTLIB_RUNNER_A_SRCS = libc/testlib/runner.c
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LIBC_TESTLIB_RUNNER_A_CHECKS = $(LIBC_TESTLIB_RUNNER_A).pkg
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LIBC_TESTLIB_RUNNER_A_OBJS = \
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$(LIBC_TESTLIB_RUNNER_A_SRCS:%.c=o/$(MODE)/%.o)
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LIBC_TESTLIB_RUNNER_A_DIRECTDEPS = \
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LIBC_FMT \
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LIBC_INTRIN \
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LIBC_NEXGEN32E \
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LIBC_RUNTIME \
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LIBC_STDIO \
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LIBC_STR \
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LIBC_TESTLIB
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LIBC_TESTLIB_RUNNER_A_DEPS := \
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$(call uniq,$(foreach x,$(LIBC_TESTLIB_RUNNER_A_DIRECTDEPS),$($(x))))
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$(LIBC_TESTLIB_RUNNER_A): \
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libc/testlib/ \
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$(LIBC_TESTLIB_RUNNER_A).pkg \
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$(LIBC_TESTLIB_RUNNER_A_OBJS)
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$(LIBC_TESTLIB_RUNNER_A).pkg: \
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$(LIBC_TESTLIB_RUNNER_A_OBJS) \
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$(foreach x,$(LIBC_TESTLIB_RUNNER_A_DIRECTDEPS),$($(x)_A).pkg)
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#───────────────────────────────────────────────────────────────────────────────
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LIBC_TESTLIB_ARTIFACTS += LIBC_TESTMAIN
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LIBC_TESTMAIN = \
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$(LIBC_TESTMAIN_DEPS) \
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$(LIBC_TESTMAIN_OBJS)
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LIBC_TESTMAIN_CHECKS = \
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o/$(MODE)/libc/testlib/testmain.pkg
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LIBC_TESTMAIN_SRCS = \
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libc/testlib/testmain.c
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LIBC_TESTMAIN_OBJS = \
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o/$(MODE)/libc/testlib/testmain.o
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LIBC_TESTMAIN_DIRECTDEPS = \
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LIBC_CALLS \
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LIBC_INTRIN \
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LIBC_LOG \
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LIBC_MEM \
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LIBC_NEXGEN32E \
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LIBC_RUNTIME \
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LIBC_STDIO \
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LIBC_SYSV \
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LIBC_SYSV_CALLS \
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LIBC_TESTLIB \
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LIBC_TESTLIB_RUNNER \
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THIRD_PARTY_DLMALLOC \
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THIRD_PARTY_GETOPT
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LIBC_TESTMAIN_DEPS := \
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$(call uniq,$(foreach x,$(LIBC_TESTMAIN_DIRECTDEPS),$($(x))))
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o/$(MODE)/libc/testlib/testmain.pkg: \
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$(LIBC_TESTMAIN_OBJS) \
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$(foreach x,$(LIBC_TESTMAIN_DIRECTDEPS),$($(x)_A).pkg)
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#───────────────────────────────────────────────────────────────────────────────
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LIBC_TESTLIB_LIBS = $(foreach x,$(LIBC_TESTLIB_ARTIFACTS),$($(x)_A))
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LIBC_TESTLIB_ARCHIVES = $(foreach x,$(LIBC_TESTLIB_ARTIFACTS),$($(x)_A))
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LIBC_TESTLIB_SRCS = $(foreach x,$(LIBC_TESTLIB_ARTIFACTS),$($(x)_SRCS))
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LIBC_TESTLIB_HDRS = $(foreach x,$(LIBC_TESTLIB_ARTIFACTS),$($(x)_HDRS))
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LIBC_TESTLIB_CHECKS = $(foreach x,$(LIBC_TESTLIB_ARTIFACTS),$($(x)_CHECKS))
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LIBC_TESTLIB_OBJS = $(foreach x,$(LIBC_TESTLIB_ARTIFACTS),$($(x)_OBJS))
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$(LIBC_TESTLIB_OBJS): $(BUILD_FILES) libc/testlib/BUILD.mk
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.PHONY: o/$(MODE)/libc/testlib
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o/$(MODE)/libc/testlib: $(LIBC_TESTLIB_LIBS) $(LIBC_TESTLIB_CHECKS)
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