Выяснил, что надо запускать либо в отдельном процессе, либо обрабатывать такие ошибки вручную.
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Kolan Sh
parent
fbf9724034
commit
07cec491fe
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# This file is generated with smake.sh.
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# You can use this make file with instruction make to
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# use one of build mode: debug, profile, develop, release.
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# No need to call make clean if You make with other mode,
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# because the Makefile containes rules for automatically clean.
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# Some usage examples:
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# make # default mode is debug
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# CFLAGS="-O2 -march=core2 -mtune=core2 --msse4.1 mfpmath=sse -fomit-frame-pointer -pipe" LDFLAGS="-Wl,-O1 -Wl,-ass-needed" make mode=develop
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# CFLAGS="-O2 -march=amdfam10 -mtune=amdfam10 -msse4a --mfpmath=sse -fomit-frame-pointer -pipe" LDFLAGS="-Wl,-O1 -Wl,--as-needed" make mode=profile
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# CFLAGS="-O2 -march=k6-2 -mtune=k6-2 -m3dnow --mfpmath=387 -fomit-frame-pointer -pipe" LDFLAGS="-Wl,-O1 -Wl,--as-needed" make mode=release
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# Report bugs to <mecareful@gmail.com>
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#_________________________________
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# ENVIRONMENT |
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#________________________________|
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CC=cc
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CXX=c++
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LIBRARIES=
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TARGET0=fp_overflow
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TARGET= $(TARGET0)
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INCLUDE1=$(HOME)/projects/include
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INCLUDE2=/usr/local/include
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INCLUDE=-I$(INCLUDE1) -I$(INCLUDE2)
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#________________________________________
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# BUILD SCRIPT (don't change) |
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#_______________________________________|
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ifeq ($(mode),)
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mode = debug
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endif
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ifeq ($(mode),debug)
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CFLAGS := -O0 -g -std=gnu99 -pedantic -Wextra -Wconversion $(CFLAGS)
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LDFLAGS := $(LDFLAGS)
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endif
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ifeq ($(mode),profile)
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CFLAGS := -O0 -g -p -ftest-coverage -Wcoverage-mismatch $(CFLAGS)
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LDFLAGS := -g -p $(LDFLAGS)
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endif
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ifeq ($(mode),develop)
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CFLAGS := -O2 -g $(CFLAGS)
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LDFLAGS := -O1 $(LDFLAGS)
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endif
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ifeq ($(mode),release)
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CFLAGS := -O2 $(CFLAGS)
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LDFLAGS := -O1 $(LDFLAGS)
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endif
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CFLAGS += -Wall
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LDFLAGS += -Wall $(LIBRARIES)
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all: change_make_options $(TARGET)
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ifneq ($(mode),debug)
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ifneq ($(mode),profile)
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ifneq ($(mode),develop)
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ifneq ($(mode),release)
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@echo "Invalid build mode."
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@echo "Please use 'make mode=release', 'make mode=develop', 'make mode=profile' or 'make mode=debug'"
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@exit 1
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endif
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endif
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endif
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endif
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@echo ".........................."
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@echo "Building on "$(mode)" mode "
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@echo "CFLAGS=$(CFLAGS)"
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@echo "LDFLAGS=$(LDFLAGS)"
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@echo ".........................."
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OLD_BUILD_MODE=$(shell grep ^MODE make_options.out 2>/dev/null | sed 's~^MODE=~~')
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OLD_BUILD_CFLAGS=$(shell grep ^CFLAGS make_options.out 2>/dev/null | sed 's~^CFLAGS=~~')
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OLD_BUILD_LDFLAGS=$(shell grep ^LDFLAGS make_options.out 2>/dev/null | sed 's~^LDFLAGS=~~')
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change_make_options:
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ifneq ($(mode)|$(CFLAGS)|$(LDFLAGS), $(OLD_BUILD_MODE)|$(OLD_BUILD_CFLAGS)|$(OLD_BUILD_LDFLAGS))
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@echo CLEANING...
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@make clean &>/dev/null
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@echo "MODE=$(mode)" > make_options.out
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@echo "CFLAGS=$(CFLAGS)" >> make_options.out
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@echo "LDFLAGS=$(LDFLAGS)" >> make_options.out
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endif
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%.o :
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$(CC) -c $(CFLAGS) $(INCLUDE) -o $@ $<
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clean:
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$(RM) *.o *.out callgrind.out.* *.gcno $(TARGET)
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.PHONY: all change_make_options clean
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#_________________________________
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# R U L E S |
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#________________________________|
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target_objs0 = \
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fp_overflow.o
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$(TARGET0): $(target_objs0)
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$(CC) $(LDFLAGS) -o $@ $(target_objs0)
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fp_overflow.o: \
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fp_overflow.c
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@ -0,0 +1,94 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <ucontext.h>
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#include <fpu_control.h>
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/*#ifdef DEBUG
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#define DIE_HERE raise(SIGFPE)
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#else
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#define DIE_HERE
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#endif*/
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void sigfpe_handler(int signo, siginfo_t *si, void *data)
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{
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ucontext_t *uc = (ucontext_t *) data;
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uc->uc_flags = 0;
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/*ucontext_t *uc;
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uc = (ucontext_t *) data;
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switch (signo) {
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case SIGFPE:
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fprintf(stdout, "Caught FPE\n");
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uc->uc_mcontext.gregs[REG_PC] = uc->uc_mcontext.gregs[REG_nPC];
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break;
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default:
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fprintf(stdout, "default handler\n");
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}*/
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}
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void no_exc()
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{
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double a = 1.932847289347532947238e20;
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double b = 1.932847293472394732424e-128;
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a /= b;
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a /= b;
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a /= b;
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a /= b;
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a /= b;
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a /= b;
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a /= b;
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double zero = 0;
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a /= zero;
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printf("a=%f\n", a);
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unsigned int c = 3984794;
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c *= c;
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c *= c;
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c *= c;
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printf("c=%u\n", c);
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}
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int div_by_zero()
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{
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/* "volatile" needed to eliminate compile-time optimizations */
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volatile unsigned long x = 42;
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volatile unsigned long y = 0;
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x=x/y;
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return 0; /* Never reached */
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}
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int div_intmin_by_invone()
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{
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volatile unsigned long x=INT_MIN;
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volatile unsigned long y=-1;
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x=x/y;
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return 0;
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}
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int main(void)
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{
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//_FPU_SETCW (_FPU_DEFAULT);
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/* register SIGFPE handler */
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/*struct sigaction sa, osa;
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unsigned int b = ULONG_MAX;
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sa.sa_sigaction = sigfpe_handler;
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sigaction(SIGFPE, &sa, &osa);*/
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//no_exc();
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//div_by_zero();
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div_intmin_by_invone();
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return EXIT_SUCCESS;
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}
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