From: Yannick Brosseau Date: Thu, 16 Feb 2012 23:37:51 +0000 (-0500) Subject: Implement the .o file generation in lttng-gen-tp X-Git-Tag: v2.0.0-rc1~3 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=db06a0a230324416a62f76bab75874065cd83e4e;p=lttng-ust.git Implement the .o file generation in lttng-gen-tp (refs #40) Signed-off-by: Yannick Brosseau Signed-off-by: Mathieu Desnoyers --- diff --git a/doc/examples/gen-tp/Makefile b/doc/examples/gen-tp/Makefile index 664372f2..c78fc67d 100644 --- a/doc/examples/gen-tp/Makefile +++ b/doc/examples/gen-tp/Makefile @@ -20,17 +20,30 @@ LIBS = -ldl -llttng-ust all: sample -sample: sample.o sample-tp.o +sample: sample.o sample_tracepoint.o $(CC) $(LIBS) -o $@ $^ sample.o: sample.c sample_tracepoint.h $(CC) $(CFLAGS) -c -o $@ $< -sample-tp.o: sample_tracepoint.c sample_tracepoint.h - $(CC) $(CFLAGS) -I. -c -o $@ $< +# Use this command to compile the .c manually +#sample_tracepoint.o: sample_tracepoint.c sample_tracepoint.h +# $(CC) $(CFLAGS) -I. -c -o $@ $< + +# This rule generate .o only and depends on rules for generating +# the .h and .c +%.o: %.tp %.c %.h + tools/lttng-gen-tp -o $@ $< + +# The following rule can be used to generate all files instead of having one +# for each file type. Note that the sample.o has a dependency on the +# .h, so you need to change that if you remove the %.h rule. +#%.o: %.tp +# lttng-gen-tp $< %.h: %.tp lttng-gen-tp -o $@ $< + %.c: %.tp lttng-gen-tp -o $@ $< diff --git a/doc/man/lttng-gen-tp.1 b/doc/man/lttng-gen-tp.1 index 3c7034cb..551f0036 100644 --- a/doc/man/lttng-gen-tp.1 +++ b/doc/man/lttng-gen-tp.1 @@ -21,10 +21,12 @@ The \fBlttng\-gen\-tp\fP tool simplify the generation of the UST tracepoint files. It takes a simple template file and generate the necessary code to use the defined tracepoints in your application. The section TEMPLATE FILE FORMAT describe the content of the template file. -Currently, the tool can generate the .h and .c associated to your +Currently, the tool can generate the .h, .c and .o associated to your tracepoint. The generated .h can be directly included in your application. -You need to compile the .c into a .o, .a or .so at your choice and -link it with your application. Refer to the UST documentation for the +You can let the tool generate the .o or compile the .c yourself. +You can compile the .c into a .o, .a or .so at your choice and +link it with your application. +Refer to the UST documentation for the advantages and disadvantage of each form. To compile the resulting .c file, you need to add the options "-llttng-ust -I." @@ -45,11 +47,11 @@ Increase verbosity. .TP .BR "\-o, \-\-output" Specify the generated file. The type of the generated file depend on the file -extension (.h, .c). +extension (.h, .c, .o). This option can be specfied multiple times to generate different file type. .PP -When no output is specified de default files are generated with the same base filename as the template file. The default files are: .h, .c. +When no output is specified de default files are generated with the same base filename as the template file. The default files are: .h, .c, .o. .SH "TEMPLATE FILE FORMAT" @@ -77,7 +79,19 @@ TRACEPOINT_EVENT( ctf_string(message, text) ) ) +.SH "ENVIRONMENT VARIABLES" +.PP +When the tool generate an .o file, it will look for the following environment variables +.PP + +.PP +.IP "CC" +Specifer which C compiler to use. If the variable is not specified, the +tool will try "cc" and "gcc" + +.IP "CFLAGS" +Flags directly passed to the compiler .SH "SEE ALSO" .PP diff --git a/tools/lttng-gen-tp b/tools/lttng-gen-tp index 9b082755..3f285348 100644 --- a/tools/lttng-gen-tp +++ b/tools/lttng-gen-tp @@ -19,6 +19,8 @@ import sys import getopt import re +import os +import subprocess class Usage(Exception): def __init__(self, msg): @@ -90,6 +92,59 @@ class CFile: headerFilename = headerFilename)) outputFile.close() +class ObjFile: + def __init__(self, filename, template): + self.outputFilename = filename + self.template = template + def _detectCC(self): + cc = "" + if os.environ.has_key('CC'): + cc = os.environ['CC'] + try: + subprocess.call(cc, + stdout=subprocess.PIPE, + stderr=subprocess.PIPE) + except OSError, msg: + print "Invalid CC environment variable" + cc = "" + + else: + # Try c first, if that fails try gcc + try: + useCC = True + subprocess.call("cc", + stdout=subprocess.PIPE, + stderr=subprocess.PIPE) + except OSError, msg: + useCC = False + if useCC: + cc = "cc" + + else: + try: + useGCC = True + subprocess.call("gcc", + stdout=subprocess.PIPE, + stderr=subprocess.PIPE) + except OSError, msg: + useGCC = False + if useGCC: + cc = "gcc" + return cc + + def write(self): + cFilename = self.outputFilename.replace(".o",".c") + cc = self._detectCC() + if cc == "": + raise RuntimeError("No C Compiler detected") + if os.environ.has_key('CFLAGS'): + cflags = os.environ['CFLAGS'] + else: + cflags = "" + + command = cc + " -c " + cflags + " -I. -llttng-ust" + " -o " + self.outputFilename + " " + cFilename + subprocess.call(command.split()) + class TemplateFile: def __init__(self, filename): self.domain = "" @@ -132,9 +187,9 @@ usage=""" If no OUTPUT_FILE is given, the .h and .c file will be generated. (The basename of the template file with be used for the generated file. - for example sample.tp will generate sample.h and sample.c) + for example sample.tp will generate sample.h, sample.c and sample.o) - When using the -o option, the OUTPUT_FILE must end with either .h or .c + When using the -o option, the OUTPUT_FILE must end with either .h, .c or .o The -o option can be repeated multiple times. The template file must contains TRACEPOINT_EVENT and TRACEPOINT_LOGLEVEL @@ -168,8 +223,10 @@ def main(argv=None): doCFile = None doHeader = None + doObj = None headerFilename = None cFilename = None + objFilename = None if len(outputNames) > 0: if len(args) > 1: @@ -184,13 +241,15 @@ def main(argv=None): doCFile = True cFilename = outputName elif outputName[-2:] == ".o": - print "Not yet implemented, sorry" + doObj = True + objFilename = outputName else: print "output file type unsupported" return(4) else: doHeader = True doCFile = True + doObj = True # process arguments for arg in args: @@ -210,6 +269,13 @@ def main(argv=None): curFilename = re.sub("\.tp$",".c",arg) dotc = CFile(curFilename, tpl) dotc.write() + if doObj: + if objFilename: + curFilename = objFilename + else: + curFilename = re.sub("\.tp$",".o",arg) + dotobj = ObjFile(curFilename, tpl) + dotobj.write() if __name__ == "__main__": sys.exit(main())