Attachment 159107 Details for Bug 201784 – dynamic_cast testcase (shell archive)

dynamic_cast testcase (shell archive)

dynamic_cast.sh (text/plain), 4.76 KB, created by Marcin Cieślak on 2015-07-23 10:40:53 UTC

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Creator: Marcin Cieślak

Created: 2015-07-23 10:40:53 UTC

Size: 4.76 KB

patch

obsolete

># This is a shell archive.  Save it in a file, remove anything before
># this line, and then unpack it by entering "sh file".  Note, it may
># create directories; files and directories will be owned by you and
># have default permissions.
>#
># This archive contains:
>#
>#	Makefile
>#	common
>#	common/classes.cc
>#	common/classes.h
>#	lib
>#	lib/Makefile
>#	lib/downcast.cc
>#	prog
>#	prog/Makefile
>#	prog/dynamic_cast.1
>#	prog/dynamic_cast.cc
>#
>echo x - Makefile
>sed 's/^X//' >Makefile << 'b67911656ef5d18c4ae36cb6741b7965'
>XSUBDIR=lib prog
>X
>Xrun::
>X	/usr/bin/env LD_LIBRARY_PATH=${.OBJDIR}/lib:${LD_LIBRARY_PATH} ${.OBJDIR}/prog/dynamic_cast
>X
>X.include <bsd.subdir.mk>
>b67911656ef5d18c4ae36cb6741b7965
>echo c - common
>mkdir -p common > /dev/null 2>&1
>echo x - common/classes.cc
>sed 's/^X//' >common/classes.cc << 'a07ef8e0bbcd013b1ad299f7d8b2489a'
>X#include "classes.h"
>X
>Xint Parent::something(void) { return 1; }
>Xint Child::something(void) { return 2; }
>a07ef8e0bbcd013b1ad299f7d8b2489a
>echo x - common/classes.h
>sed 's/^X//' >common/classes.h << '8bd6b113f0957a684f12533972e2849f'
>Xclass Parent {
>X  public:
>X    virtual int something(void);
>X};
>Xclass Child : public Parent {
>X  public:
>X    virtual int something(void);
>X};
>8bd6b113f0957a684f12533972e2849f
>echo c - lib
>mkdir -p lib > /dev/null 2>&1
>echo x - lib/Makefile
>sed 's/^X//' >lib/Makefile << '94e18c7e8b5bab8a1215265cdb5ca1f4'
>XSRCDIR=		${.CURDIR}/../common
>X
>XSHLIB_MAJOR=	1
>X
>X.PATH: ${SRCDIR}
>X
>XLIB=		dynamic_cast
>X
>XSRCS+=		\
>X    classes.cc \
>X    downcast.cc
>X
>XWARNS=		9
>XCXXFLAGS+=	-I${SRCDIR}
>X
>X.include <bsd.lib.mk>
>94e18c7e8b5bab8a1215265cdb5ca1f4
>echo x - lib/downcast.cc
>sed 's/^X//' >lib/downcast.cc << '83e7bd6954b57f3f10f791ff49167079'
>X#include <classes.h>
>X
>X#if __cplusplus
>Xextern "C" int runsomething(Parent *ptr);
>Xextern "C" void *downcast(Parent *ptr);
>X#endif
>X
>Xint
>Xrunsomething(Parent *ptr)
>X{
>X  return ptr->something();
>X}
>X
>Xvoid *
>Xdowncast(Parent *ptr)
>X{
>X  Child *n = dynamic_cast<Child *>(ptr);
>X  return n;
>X}
>83e7bd6954b57f3f10f791ff49167079
>echo c - prog
>mkdir -p prog > /dev/null 2>&1
>echo x - prog/Makefile
>sed 's/^X//' >prog/Makefile << '10dda222a2d60d4d7795f25f4761aac9'
>XSRCDIR=   ${.CURDIR}/../common
>X
>X.PATH: ${SRCDIR}
>X
>XPROG= dynamic_cast
>XPROG_CXX:= ${PROG}
>X
>XSRCS+= \
>X	classes.cc \
>X	dynamic_cast.cc 
>X
>X
>XCFLAGS+= -I${SRCDIR}
>XCXXFLAGS+=	-std=c++11
>X
>XWARNS= 9
>X
>X.include <bsd.prog.mk>
>X
>XTARGET_OSNAME ?= BSD
>X.if ${TARGET_OSNAME} == "Linux"
>X_CCLINK= ${CXX}
>XLDADD += -ldl
>X.endif
>X
>10dda222a2d60d4d7795f25f4761aac9
>echo x - prog/dynamic_cast.1
>sed 's/^X//' >prog/dynamic_cast.1 << '862ebc4528faab8809aa13cd743cdf1f'
>X.Dd July 20, 2015
>X.Dt dynamic_cast 1
>X.Os
>X.Sh NAME
>X.Nm dynamic_cast
>X.Nd Test C++ dynamic_cast feature of the runtime C++11 library
>X.Sh SYNOPSIS
>X.Nm
>X.Sh DESCRIPTION
>XThis utility tests how C++ 
>X.Fn dynamic_cast<Child*>
>Xcasting works across shared modules linked at run-time.
>X.Pp
>XDowncasting is an attempt to cast a pointer of the value of a base class
>Xto the value of a derived class, provided the runtime type information
>X(RTTI) is provided. The
>X.Fn dynamic_cast
>Xoperator fails if the object is not an intance of a derived class.
>X.Pp
>XIn this example downcasting is attempted in one module as well
>Xas via the library provided at run-time.
>X.Sh AUTHOR
>XMarcin Cieslak <saper@saper.info>
>862ebc4528faab8809aa13cd743cdf1f
>echo x - prog/dynamic_cast.cc
>sed 's/^X//' >prog/dynamic_cast.cc << 'fdbd0639903ecb20c6c82f358a55b0fc'
>X#include <dlfcn.h>
>X#include <stdio.h>
>X#include <sysexits.h>
>X
>X#include "classes.h"
>X
>Xstatic const char *libpath = "libdynamic_cast.so";
>Xint
>Xmain()
>X{
>X  void *lib, *sym;
>X  Parent obj1 = Parent();
>X  Child  obj2 = Child();
>X  Parent *objptr1 = &obj1;
>X  Parent *objptr2 = &obj2;
>X  if ((lib = dlopen(libpath, RTLD_LAZY))) {
>X    if ((sym = dlsym(lib, "runsomething"))) {
>X      printf("Parent::something() = %d\n", (*(int(*)(Parent *))sym)(objptr1));
>X      printf("Child::something() = %d\n", (*(int(*)(Parent *))sym)(objptr2));
>X    } else {
>X      fprintf(stderr, "dlsym(\"runsomething\"): %s\n", dlerror());
>X      return EX_SOFTWARE;
>X    }
>X    if ((sym = dlsym(lib, "downcast"))) {
>X      printf("library dynamic_cast<Child *>(Parent *) = %p\n",
>X            (*(void *(*)(Parent *))sym)(objptr1));
>X      printf("library dynamic_cast<Child *>(Child *) = %p\n",
>X            (*(void *(*)(Parent *))sym)(objptr2));
>X      printf("local dynamic_cast<Child *>(Parent *) = %p\n",
>X            dynamic_cast<Child *>(objptr1));
>X      printf("local dynamic_cast<Child *>(Child *) = %p\n",
>X            dynamic_cast<Child *>(objptr2));
>X    } else {
>X      fprintf(stderr, "dlsym(\"downcast\"): %s\n", dlerror());
>X      return EX_SOFTWARE;
>X    }
>X    return 0;
>X  } else {
>X    fprintf(stderr, "dlopen: %s\n", dlerror());
>X    return EX_SOFTWARE;
>X  }
>X}
>fdbd0639903ecb20c6c82f358a55b0fc
>exit
>

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Attachments on bug 201784: 159107