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Fix memory leak in R shared_ptr wrappers

Browse source 
Fix leak when a cast up a class inheritance chain is
required.

Adds implementation of SWIG_ConvertPtrAndOwn for R.

Closes #2386
This commit is contained in:
William S Fulton 2022-10-26 22:44:13 +01:00
commit 9e7610f972
4 changed files with 36 additions and 22 deletions
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4
CHANGES.current
View file

@ -7,3 +7,7 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
Version 4.2.0 (in progress)
===========================
2022-10-26: wsfulton
[R] #2386 Fix memory leak in R shared_ptr wrappers.
Fix leak when a cast up a class inheritance chain is required.

32
Examples/test-suite/r/li_boost_shared_ptr_runme.R
View file

@ -80,8 +80,8 @@ testSuite <- function() {
testSuite_verifyCount(2, kret)
}
# pass by shared_ptr pointer reference
{
# pass by shared_ptr pointer reference
k = Klass("me oh my")
kret = smartpointerpointerreftest(k)
val = kret$getValue()
@ -312,8 +312,8 @@ testSuite <- function() {
kret = smartpointertest(k)
val = kret$getValue()
unittest("me oh my smartpointertest-Derived", val)
#testSuite_verifyCount(2, k)
#testSuite_verifyCount(2, kret)
testSuite_verifyCount(2, k)
testSuite_verifyCount(2, kret)
}
# pass by shared_ptr pointer (mixed)
@ -322,8 +322,8 @@ testSuite <- function() {
kret = smartpointerpointertest(k)
val = kret$getValue()
unittest("me oh my smartpointerpointertest-Derived", val)
#testSuite_verifyCount(2, k)
#testSuite_verifyCount(2, kret)
testSuite_verifyCount(2, k)
testSuite_verifyCount(2, kret)
}
# pass by shared_ptr reference (mixed)
@ -332,8 +332,8 @@ testSuite <- function() {
kret = smartpointerreftest(k)
val = kret$getValue()
unittest("me oh my smartpointerreftest-Derived", val)
#testSuite_verifyCount(2, k)
#testSuite_verifyCount(2, kret)
testSuite_verifyCount(2, k)
testSuite_verifyCount(2, kret)
}
# pass by shared_ptr pointer reference (mixed)
@ -342,8 +342,8 @@ testSuite <- function() {
kret = smartpointerpointerreftest(k)
val = kret$getValue()
unittest("me oh my smartpointerpointerreftest-Derived", val)
#testSuite_verifyCount(2, k)
#testSuite_verifyCount(2, kret)
testSuite_verifyCount(2, k)
testSuite_verifyCount(2, kret)
}
# pass by value (mixed)
@ -352,8 +352,8 @@ testSuite <- function() {
kret = valuetest(k)
val = kret$getValue()
unittest("me oh my valuetest", val) # note slicing
#testSuite_verifyCount(1, k)
#testSuite_verifyCount(1, kret)
testSuite_verifyCount(1, k)
testSuite_verifyCount(1, kret)
}
# pass by pointer (mixed)
@ -362,8 +362,8 @@ testSuite <- function() {
kret = pointertest(k)
val = kret$getValue()
unittest("me oh my pointertest-Derived", val)
#testSuite_verifyCount(1, k)
#testSuite_verifyCount(1, kret)
testSuite_verifyCount(1, k)
testSuite_verifyCount(1, kret)
}
# pass by ref (mixed)
@ -372,8 +372,8 @@ testSuite <- function() {
kret = reftest(k)
val = kret$getValue()
unittest("me oh my reftest-Derived", val)
#testSuite_verifyCount(1, k)
#testSuite_verifyCount(1, kret)
testSuite_verifyCount(1, k)
testSuite_verifyCount(1, kret)
}
@ -420,7 +420,7 @@ testSuite <- function() {
testSuite_verifyCount(1, k)
val = test3rdupcast(k)
unittest("me oh my-3rdDerived", val)
# testSuite_verifyCount(1, k)
testSuite_verifyCount(1, k)
}
#

18
Lib/r/rrun.swg
View file

@ -15,8 +15,9 @@ extern "C" {
#endif
/* for raw pointer */
#define SWIG_R_ConvertPtr(obj, pptr, type, flags) SWIG_R_ConvertPtrAndOwn(obj, pptr, type, flags, 0)
#define SWIG_ConvertPtr(obj, pptr, type, flags) SWIG_R_ConvertPtr(obj, pptr, type, flags)
#define SWIG_ConvertPtrAndOwn(obj,pptr,type,flags,own) SWIG_R_ConvertPtr(obj, pptr, type, flags)
#define SWIG_ConvertPtrAndOwn(obj,pptr,type,flags,own) SWIG_R_ConvertPtrAndOwn(obj, pptr, type, flags, own)
#define SWIG_NewPointerObj(ptr, type, flags) SWIG_R_NewPointerObj(ptr, type, flags)
#include <stdio.h>
@ -314,9 +315,11 @@ SWIG_R_NewPointerObj(void *ptr, swig_type_info *type, int flags) {
/* Convert a pointer value */
SWIGRUNTIMEINLINE int
SWIG_R_ConvertPtr(SEXP obj, void **ptr, swig_type_info *ty, int flags) {
SWIG_R_ConvertPtrAndOwn(SEXP obj, void **ptr, swig_type_info *ty, int flags, int *own) {
void *vptr;
if (!obj) return SWIG_ERROR;
if (own)
*own = 0;
if (obj == R_NilValue) {
if (ptr) *ptr = NULL;
return (flags & SWIG_POINTER_NO_NULL) ? SWIG_NullReferenceError : SWIG_OK;
@ -331,8 +334,15 @@ SWIG_R_ConvertPtr(SEXP obj, void **ptr, swig_type_info *ty, int flags) {
} else {
swig_cast_info *tc = SWIG_TypeCheck(to->name,ty);
int newmemory = 0;
if (ptr) *ptr = SWIG_TypeCast(tc,vptr,&newmemory);
assert(!newmemory); /* newmemory handling not yet implemented */
if (ptr) {
int newmemory = 0;
*ptr = SWIG_TypeCast(tc, vptr, &newmemory);
if (newmemory == SWIG_CAST_NEW_MEMORY) {
assert(own); /* badly formed typemap which will lead to a memory leak - it must set and use own to delete *ptr */
if (own)
*own = *own | SWIG_CAST_NEW_MEMORY;
}
}
}
} else {
if (ptr) *ptr = vptr;

4
Lib/r/std_vector.i
View file

@ -544,7 +544,7 @@
struct traits_asptr < std::vector<T> > {
static int asptr(SEXP obj, std::vector<T> **val) {
std::vector<T> *p;
int res = SWIG_R_ConvertPtr(obj, (void**)&p, type_info< std::vector<T> >(), 0);
int res = SWIG_ConvertPtr(obj, (void**)&p, type_info< std::vector<T> >(), 0);
if (SWIG_IsOK(res)) {
if (val) *val = p;
}
@ -827,7 +827,7 @@
static int asptr(SEXP obj, std::vector< std::vector<T> > **val) {
std::vector< std::vector<T> > *p;
Rprintf("vector of vectors - unsupported content\n");
int res = SWIG_R_ConvertPtr(obj, (void**)&p, type_info< std::vector< std::vector<T> > > (), 0);
int res = SWIG_ConvertPtr(obj, (void**)&p, type_info< std::vector< std::vector<T> > > (), 0);
if (SWIG_IsOK(res)) {
if (val) *val = p;
}