mirror of
https://github.com/apache/nuttx.git
synced 2025-01-13 07:28:38 +08:00
Create wrapper library for system call instrumentation
This commit is contained in:
Nakamura, Yuuichi
Xiang Xiao
parent
2b4d2cd4a3
commit
376786288e
12 changed files with 478 additions and 5 deletions
1
syscall/.gitignore
vendored
1
syscall/.gitignore
vendored
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@ -1 +1,2 @@
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/.context
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/*.ldcmd
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@ -37,18 +37,27 @@ include $(TOPDIR)/Make.defs
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include proxies/Make.defs
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include stubs/Make.defs
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include wraps/Make.defs
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MKSYSCALL = "$(TOPDIR)$(DELIM)tools$(DELIM)mksyscall$(HOSTEXEEXT)"
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CSVFILE = "$(TOPDIR)$(DELIM)syscall$(DELIM)syscall.csv"
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ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
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ifeq ($(CONFIG_LIB_SYSCALL),y)
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PROXY_SRCS += syscall_names.c
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else
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WRAP_SRCS += syscall_names.c
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endif
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endif
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STUB_SRCS += syscall_stublookup.c
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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PROXY_OBJS = $(PROXY_SRCS:.c=$(OBJEXT))
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STUB_OBJS = $(STUB_SRCS:.c=$(OBJEXT))
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WRAP_OBJS = $(WRAP_SRCS:.c=$(OBJEXT))
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CSRCS = $(PROXY_SRCS) $(STUB_SRCS)
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CSRCS = $(PROXY_SRCS) $(STUB_SRCS) $(WRAP_SRCS)
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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@ -56,12 +65,15 @@ OBJS = $(AOBJS) $(COBJS)
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PROXYDEPPATH = --dep-path proxies
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STUBDEPPATH = --dep-path stubs
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VPATH = proxies:stubs
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WRAPDEPPATH = --dep-path wraps
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VPATH = proxies:stubs:wraps
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BIN1 = libproxies$(LIBEXT)
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BIN2 = libstubs$(LIBEXT)
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BIN3 = libwraps$(LIBEXT)
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SYSCALLWRAPS = syscall_wraps.ldcmd
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all: $(BIN1) $(BIN2)
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all: $(BIN1) $(BIN2) $(BIN3) $(SYSCALLWRAPS)
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.PHONY: context depend clean distclean
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$(AOBJS): %$(OBJEXT): %.S
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@ -76,8 +88,13 @@ $(BIN1): $(PROXY_OBJS)
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$(BIN2): $(STUB_OBJS)
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$(call ARCHIVE, $@, $(STUB_OBJS))
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$(BIN3): $(WRAP_OBJS)
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$(call ARCHIVE, $@, $(WRAP_OBJS))
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$(SYSCALLWRAPS): .context
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.depend: Makefile $(SRCS)
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$(Q) $(MKDEP) $(PROXYDEPPATH) $(STUBDEPPATH) \
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$(Q) $(MKDEP) $(PROXYDEPPATH) $(STUBDEPPATH) $(WRAPDEPPATH) \
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"$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
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$(Q) touch $@
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@ -85,8 +102,15 @@ depend: .depend
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.context: syscall.csv
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$(Q) $(MAKE) -C $(TOPDIR)$(DELIM)tools -f Makefile.host mksyscall
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ifeq ($(CONFIG_LIB_SYSCALL),y)
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$(Q) (cd proxies; $(MKSYSCALL) -p $(CSVFILE);)
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$(Q) (cd stubs; $(MKSYSCALL) -s $(CSVFILE);)
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endif
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ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
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$(Q) (cd wraps; $(MKSYSCALL) -w $(CSVFILE);)
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$(Q) $(CPP) $(CPPFLAGS) $(SYSCALLWRAPS:.ldcmd=.h) | \
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sed -e '1,/WRAPOPTSTARTS/d' -e '/^#/d' > $(SYSCALLWRAPS)
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endif
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$(Q) touch $@
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context: .context
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@ -94,9 +118,11 @@ context: .context
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clean:
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$(call DELFILE, $(BIN1))
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$(call DELFILE, $(BIN2))
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$(call DELFILE, $(BIN3))
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ifneq ($(OBJEXT),)
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$(call DELFILE, proxies$(DELIM)*$(OBJEXT))
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$(call DELFILE, stubs$(DELIM)*$(OBJEXT))
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$(call DELFILE, wraps$(DELIM)*$(OBJEXT))
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endif
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$(call CLEAN)
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@ -106,5 +132,7 @@ distclean: clean
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$(call DELFILE, .depend)
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$(call DELFILE, proxies$(DELIM)*.c)
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$(call DELFILE, stubs$(DELIM)*.c)
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$(call DELFILE, wraps$(DELIM)*.c)
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$(call DELFILE, $(SYSCALLWRAPS))
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-include Make.dep
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48
syscall/syscall_names.c
Normal file
48
syscall/syscall_names.c
Normal file
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@ -0,0 +1,48 @@
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/****************************************************************************
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* syscall/syscall_names.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifndef CONFIG_LIB_SYSCALL
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#define CONFIG_LIB_SYSCALL
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#endif
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#include <syscall.h>
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* System call name tables. This table is indexed by the system call numbers
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* defined above. Given the system call number, this table provides the
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* name of the corresponding system function.
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*/
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const char *g_funcnames[SYS_nsyscalls] =
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{
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# define SYSCALL_LOOKUP1(f,n) #f
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# define SYSCALL_LOOKUP(f,n) , #f
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# include <sys/syscall_lookup.h>
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# undef SYSCALL_LOOKUP1
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# undef SYSCALL_LOOKUP
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};
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37
syscall/syscall_wraps.h
Normal file
37
syscall/syscall_wraps.h
Normal file
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@ -0,0 +1,37 @@
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/****************************************************************************
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* syscall/syscall_wraps.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/arch.h>
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#ifndef UP_WRAPOPT
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#define UP_WRAPOPT(f) --wrap f
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#endif
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#define SYSCALL_LOOKUP1(f,n) UP_WRAPOPT(f)
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#define SYSCALL_LOOKUP(f,n) UP_WRAPOPT(f)
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WRAPOPTSTARTS
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#include <sys/syscall_lookup.h>
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1
syscall/wraps/.gitignore
vendored
Normal file
1
syscall/wraps/.gitignore
vendored
Normal file
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@ -0,0 +1 @@
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/*.c
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21
syscall/wraps/Make.defs
Normal file
21
syscall/wraps/Make.defs
Normal file
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@ -0,0 +1,21 @@
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############################################################################
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# syscall/wraps/Make.defs
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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WRAP_SRCS := ${shell cd wraps; ls *.c 2>/dev/null }
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@ -99,8 +99,13 @@ ifeq ($(CONFIG_LIB_SYSCALL),y)
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CONTEXTDIRS += syscall
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USERDEPDIRS += syscall
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else
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ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
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CONTEXTDIRS += syscall
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USERDEPDIRS += syscall
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else
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CLEANDIRS += syscall
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endif
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endif
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ifeq ($(CONFIG_LIB_ZONEINFO_ROMFS),y)
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CONTEXTDIRS += libs$(DELIM)libc
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@ -62,6 +62,12 @@ NUTTXLIBS += staging$(DELIM)libstubs$(LIBEXT)
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USERLIBS += staging$(DELIM)libproxies$(LIBEXT)
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endif
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# Add library for system call instrumentation if needed
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ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
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NUTTXLIBS += staging$(DELIM)libwraps$(LIBEXT)
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endif
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# Add libraries for two pass build support. The special directory pass1
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# may be populated so that application generated logic can be included into
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# the kernel build
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@ -59,6 +59,12 @@ NUTTXLIBS += staging$(DELIM)libkmm$(LIBEXT) staging$(DELIM)libkarch$(LIBEXT)
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USERLIBS += staging$(DELIM)libproxies$(LIBEXT) staging$(DELIM)libc$(LIBEXT)
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USERLIBS += staging$(DELIM)libmm$(LIBEXT) staging$(DELIM)libarch$(LIBEXT)
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# Add library for system call instrumentation if needed
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ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
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NUTTXLIBS += staging$(DELIM)libwraps$(LIBEXT)
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endif
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# Add libraries for C++ support. CXX, CXXFLAGS, and COMPILEXX must
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# be defined in Make.defs for this to work!
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@ -148,6 +148,12 @@ syscall$(DELIM)libstubs$(LIBEXT): pass2dep
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staging$(DELIM)libstubs$(LIBEXT): syscall$(DELIM)libstubs$(LIBEXT)
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$(Q) $(call INSTALL_LIB,$<,$@)
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syscall$(DELIM)libwraps$(LIBEXT): pass2dep
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$(Q) $(MAKE) -C syscall TOPDIR="$(TOPDIR)" libwraps$(LIBEXT) EXTRAFLAGS="$(KDEFINE) $(EXTRAFLAGS)"
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staging$(DELIM)libwraps$(LIBEXT): syscall$(DELIM)libwraps$(LIBEXT)
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$(Q) $(call INSTALL_LIB,$<,$@)
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# Special case
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ifeq ($(CONFIG_BUILD_FLAT),y)
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@ -60,6 +60,12 @@ NUTTXLIBS += staging$(DELIM)libkmm$(LIBEXT) staging$(DELIM)libkarch$(LIBEXT)
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USERLIBS += staging$(DELIM)libproxies$(LIBEXT) staging$(DELIM)libc$(LIBEXT)
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USERLIBS += staging$(DELIM)libmm$(LIBEXT) staging$(DELIM)libarch$(LIBEXT)
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# Add library for system call instrumentation if needed
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ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
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NUTTXLIBS += staging$(DELIM)libwraps$(LIBEXT)
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endif
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# Add libraries for two pass build support. The special directory pass1
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# may be populated so that application generated logic can be included into
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# the kernel build
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@ -520,6 +520,304 @@ static void generate_stub(int nfixed, int nparms)
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stub_close(stream);
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}
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static FILE *open_wrapper(void)
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{
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char filename[MAX_PARMSIZE + 8];
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FILE *stream;
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snprintf(filename, MAX_PARMSIZE + 7, "WRAP_%s.c", g_parm[NAME_INDEX]);
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filename[MAX_PARMSIZE + 7] = '\0';
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stream = fopen(filename, "w");
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if (stream == NULL)
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{
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fprintf(stderr, "Failed to open %s: %s\n", filename, strerror(errno));
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exit(10);
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}
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return stream;
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}
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static void generate_wrapper(int nfixed, int nparms)
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{
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FILE *stream = open_wrapper();
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char formal[MAX_PARMSIZE];
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char actual[MAX_PARMSIZE];
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char fieldname[MAX_PARMSIZE];
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int i = 0;
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/* Generate "up-front" information, include correct header files */
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fprintf(stream, "/* Auto-generated %s wrap file -- do not edit */\n\n",
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g_parm[NAME_INDEX]);
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fprintf(stream, "#include <nuttx/config.h>\n");
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fprintf(stream, "#include <nuttx/sched_note.h>\n");
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fprintf(stream, "#include <stdint.h>\n");
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/* Suppress "'noreturn' function does return" warnings. */
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fprintf(stream, "#include <nuttx/compiler.h>\n");
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fprintf(stream, "#undef noreturn_function\n");
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fprintf(stream, "#define noreturn_function\n");
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/* CONFIG_LIB_SYSCALL must be defined to get syscall number */
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fprintf(stream, "#undef CONFIG_LIB_SYSCALL\n");
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fprintf(stream, "#define CONFIG_LIB_SYSCALL\n");
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fprintf(stream, "#include <syscall.h>\n");
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/* Does this function have a variable number of parameters? If so then the
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* final parameter type will be encoded as "..."
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*/
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if (nfixed != nparms)
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{
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fprintf(stream, "#include <stdarg.h>\n");
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}
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if (g_parm[HEADER_INDEX] && strlen(g_parm[HEADER_INDEX]) > 0)
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{
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fprintf(stream, "#include <%s>\n", g_parm[HEADER_INDEX]);
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}
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/* Define macros to get wrapper symbol */
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fprintf(stream, "#include <nuttx/arch.h>\n");
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fprintf(stream, "#ifndef UP_WRAPSYM\n");
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fprintf(stream, "#define UP_WRAPSYM(s) __wrap_##s\n");
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fprintf(stream, "#endif\n");
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fprintf(stream, "#ifndef UP_REALSYM\n");
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fprintf(stream, "#define UP_REALSYM(s) __real_##s\n");
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fprintf(stream, "#endif\n\n");
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if (g_parm[COND_INDEX][0] != '\0')
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{
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fprintf(stream, "#if %s\n\n", g_parm[COND_INDEX]);
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}
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/* Generate the wrapper function definition that matches standard function
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* prototype
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*/
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fprintf(stream, "%s UP_WRAPSYM(%s)(", g_parm[RETTYPE_INDEX],
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g_parm[NAME_INDEX]);
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/* Generate the formal parameter list */
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if (nparms <= 0)
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{
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fprintf(stream, "void");
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}
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else
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{
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for (i = 0; i < nfixed; i++)
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{
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/* The formal and actual parameter types may be encoded.. extra the
|
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* formal parameter type.
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*/
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get_formalparmtype(g_parm[PARM1_INDEX + i], formal);
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|
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/* Arguments after the first must be separated from the preceding
|
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* parameter with a comma.
|
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*/
|
||||
|
||||
if (i > 0)
|
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{
|
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fprintf(stream, ", ");
|
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}
|
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|
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print_formalparm(stream, formal, i + 1);
|
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}
|
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}
|
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|
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if (i < nparms)
|
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{
|
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fprintf(stream, ", ...)\n{\n");
|
||||
}
|
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else
|
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{
|
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fprintf(stream, ")\n{\n");
|
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}
|
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|
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/* Generate the result variable definition for non-void function */
|
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|
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if (strcmp(g_parm[RETTYPE_INDEX], "void") != 0)
|
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{
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fprintf(stream, " %s result;\n", g_parm[RETTYPE_INDEX]);
|
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}
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/* Generate the wrapped (real) function prototype definition */
|
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|
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fprintf(stream, " %s UP_REALSYM(%s)(", g_parm[RETTYPE_INDEX],
|
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g_parm[NAME_INDEX]);
|
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|
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/* Generate the formal parameter list */
|
||||
|
||||
if (nparms <= 0)
|
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{
|
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fprintf(stream, "void");
|
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}
|
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else
|
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{
|
||||
for (i = 0; i < nfixed; i++)
|
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{
|
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/* The formal and actual parameter types may be encoded.. extra the
|
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* formal parameter type.
|
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*/
|
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|
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get_formalparmtype(g_parm[PARM1_INDEX + i], formal);
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|
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/* Arguments after the first must be separated from the preceding
|
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* parameter with a comma.
|
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*/
|
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|
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if (i > 0)
|
||||
{
|
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fprintf(stream, ", ");
|
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}
|
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|
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fprintf(stream, "%s", formal);
|
||||
}
|
||||
}
|
||||
|
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/* Handle the end of the formal parameter list */
|
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|
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if (i < nparms)
|
||||
{
|
||||
fprintf(stream, ", ...);\n");
|
||||
|
||||
/* Get parm variables .. some from the parameter list and others from
|
||||
* the varargs.
|
||||
*/
|
||||
|
||||
fprintf(stream, " va_list ap;\n");
|
||||
for (; i < nparms; i++)
|
||||
{
|
||||
get_formalparmtype(g_parm[PARM1_INDEX + i], formal);
|
||||
fprintf(stream, " %s parm%d;\n", formal, i + 1);
|
||||
}
|
||||
|
||||
fprintf(stream, "\n va_start(ap, parm%d);\n", nfixed);
|
||||
|
||||
for (i = nfixed; i < nparms; i++)
|
||||
{
|
||||
get_formalparmtype(g_parm[PARM1_INDEX + i], formal);
|
||||
get_actualparmtype(g_parm[PARM1_INDEX + i], actual);
|
||||
|
||||
if (is_union(formal))
|
||||
{
|
||||
fprintf(stream, " parm%d = (%s)va_arg(ap, %s);\n",
|
||||
i + 1, formal, actual);
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stream, " parm%d = va_arg(ap, %s);\n", i + 1, actual);
|
||||
}
|
||||
}
|
||||
|
||||
fprintf(stream, " va_end(ap);\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stream, ");\n");
|
||||
}
|
||||
|
||||
/* Call system call enter hook function */
|
||||
|
||||
fprintf(stream, "\n sched_note_syscall_enter(SYS_%s, %d",
|
||||
g_parm[NAME_INDEX], nparms);
|
||||
|
||||
for (i = 0; i < nparms; i++)
|
||||
{
|
||||
/* Is the parameter a union member */
|
||||
|
||||
if (is_union(g_parm[PARM1_INDEX + i]))
|
||||
{
|
||||
/* Then we will have to pick a field name that can be cast to a
|
||||
* uintptr_t. There probably should be some error handling here<
|
||||
* to catch the case where the fieldname was not supplied.
|
||||
*/
|
||||
|
||||
get_fieldname(g_parm[PARM1_INDEX + i], fieldname);
|
||||
fprintf(stream, ", (uintptr_t)parm%d.%s", i + 1, fieldname);
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stream, ", (uintptr_t)parm%d", i + 1);
|
||||
}
|
||||
}
|
||||
|
||||
fprintf(stream, ");\n\n");
|
||||
|
||||
/* Then call the wrapped (real) function. Functions that have no return
|
||||
* value are a special case.
|
||||
*/
|
||||
|
||||
if (strcmp(g_parm[RETTYPE_INDEX], "void") == 0)
|
||||
{
|
||||
fprintf(stream, " UP_REALSYM(%s)(", g_parm[NAME_INDEX]);
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stream, " result = UP_REALSYM(%s)(", g_parm[NAME_INDEX]);
|
||||
}
|
||||
|
||||
/* The pass all of the system call parameters */
|
||||
|
||||
for (i = 0; i < nparms; i++)
|
||||
{
|
||||
/* Treat the first argument in the list differently from the others..
|
||||
* It does not need a comma before it.
|
||||
*/
|
||||
|
||||
if (i > 0)
|
||||
{
|
||||
fprintf(stream, ", ");
|
||||
}
|
||||
|
||||
fprintf(stream, "parm%d", i + 1);
|
||||
}
|
||||
|
||||
fprintf(stream, ");\n\n");
|
||||
|
||||
/* Call system call leave hook function */
|
||||
|
||||
fprintf(stream, " sched_note_syscall_leave(SYS_%s, ", g_parm[NAME_INDEX]);
|
||||
|
||||
if (strcmp(g_parm[RETTYPE_INDEX], "void") == 0)
|
||||
{
|
||||
fprintf(stream, "0");
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stream, "(uintptr_t)result");
|
||||
}
|
||||
|
||||
fprintf(stream, ");\n\n");
|
||||
|
||||
/* Tail end of the function. If the wrapped (real) function has no return
|
||||
* value, do nothing.
|
||||
*/
|
||||
|
||||
if (strcmp(g_parm[RETTYPE_INDEX], "void") == 0)
|
||||
{
|
||||
fprintf(stream, "}\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stream, " return result;\n}\n");
|
||||
}
|
||||
|
||||
if (g_parm[COND_INDEX][0] != '\0')
|
||||
{
|
||||
fprintf(stream, "\n#endif /* %s */\n", g_parm[COND_INDEX]);
|
||||
}
|
||||
|
||||
fclose(stream);
|
||||
}
|
||||
|
||||
static void show_usage(const char *progname)
|
||||
{
|
||||
fprintf(stderr, "USAGE: %s [-p|s|i] <CSV file>\n\n", progname);
|
||||
|
|
@ -527,6 +825,7 @@ static void show_usage(const char *progname)
|
|||
fprintf(stderr, "\t-p : Generate proxies\n");
|
||||
fprintf(stderr, "\t-s : Generate stubs\n");
|
||||
fprintf(stderr, "\t-i : Generate proxies as static inline functions\n");
|
||||
fprintf(stderr, "\t-w : Generate wrappers\n");
|
||||
fprintf(stderr, "\t-d : Enable debug output\n");
|
||||
exit(1);
|
||||
}
|
||||
|
|
@ -539,6 +838,7 @@ int main(int argc, char **argv, char **envp)
|
|||
{
|
||||
char *csvpath;
|
||||
bool proxies = false;
|
||||
bool wrappers = false;
|
||||
FILE *stream;
|
||||
char *ptr;
|
||||
int ch;
|
||||
|
|
@ -549,7 +849,7 @@ int main(int argc, char **argv, char **envp)
|
|||
g_debug = false;
|
||||
g_inline = false;
|
||||
|
||||
while ((ch = getopt(argc, argv, ":dps")) > 0)
|
||||
while ((ch = getopt(argc, argv, ":dpsw")) > 0)
|
||||
{
|
||||
switch (ch)
|
||||
{
|
||||
|
|
@ -569,6 +869,10 @@ int main(int argc, char **argv, char **envp)
|
|||
g_inline = true;
|
||||
break;
|
||||
|
||||
case 'w' :
|
||||
wrappers = true;
|
||||
break;
|
||||
|
||||
case '?' :
|
||||
fprintf(stderr, "Unrecognized option: %c\n", optopt);
|
||||
show_usage(argv[0]);
|
||||
|
|
@ -661,6 +965,10 @@ int main(int argc, char **argv, char **envp)
|
|||
{
|
||||
generate_proxy(nfixed, nargs - PARM1_INDEX);
|
||||
}
|
||||
else if (wrappers)
|
||||
{
|
||||
generate_wrapper(nfixed, nargs - PARM1_INDEX);
|
||||
}
|
||||
else
|
||||
{
|
||||
g_stubstream = NULL;
|
||||
|
|
|
|||
Loading…
Reference in a new issue