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[Go] More fixes for Go 1.4. Ensure that values with argout or freearg

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typemapes escape, and refer to them using local variables loaded at
the start of the function, in case the argout or freearg template
causes a stack copy.
This commit is contained in:
Ian Lance Taylor 2014-10-11 19:07:14 -07:00
commit 1226970b9f
1 changed files with 42 additions and 8 deletions
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50
Source/Modules/go.cxx
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@ -919,6 +919,18 @@ private:
} else if (goTypeIsInterface(p, ty) || Getattr(p, "tmap:goin")) {
needs_wrapper = true;
}
// If the parameter has an argout or freearg typemap, we need to
// make sure that it escapes, in case it contains any pointers.
if (Getattr(p, "tmap:argout") || Getattr(p, "tmap:freearg")) {
if (!goTypeIsInterface(p, Getattr(p, "type"))) {
String *tm = goWrapperType(p, Getattr(p, "type"), false);
Printf(f_go_wrappers, "var %s_escape_%d %s\n", wname, i, tm);
Delete(tm);
needs_wrapper = true;
}
}
p = nextParm(p);
}
if (goTypeIsInterface(n, result) || goout != NULL) {
@ -1204,6 +1216,15 @@ private:
Setattr(p, "emit:goinput", ivar);
}
// If the parameter has an argout or freearg typemap, make
// sure that it escapes.
if (Getattr(p, "tmap:argout") || Getattr(p, "tmap:freearg")) {
// No need to do anything for C++ class type.
if (!goTypeIsInterface(p, pt)) {
Printf(f_go_wrappers, "\t%s_escape_%d = %s\n", wname, i, Getattr(p, "emit:goinput"));
}
}
p = nextParm(p);
}
Printv(call, ")\n", NULL);
@ -1342,11 +1363,19 @@ private:
Parm *p = parms;
for (int i = 0; i < parm_count; ++i) {
p = getParm(p);
String *ln = Getattr(p, "lname");
SwigType *pt = Getattr(p, "type");
String *ct = gcCTypeForGoValue(p, pt, ln);
Printv(f->code, "\t\t\t", ct, ";\n", NULL);
Delete(ct);
String *gn = NewStringf("_swig_go_%d", i);
ct = gcCTypeForGoValue(p, pt, gn);
Setattr(p, "emit:input", gn);
Wrapper_add_local(f, gn, ct);
Delete(ct);
p = nextParm(p);
}
if (SwigType_type(result) != T_VOID) {
@ -1367,23 +1396,28 @@ private:
Printv(f->code, "\n", NULL);
// Copy the input arguments out of the structure into the
// parameter variables.
// Copy the input arguments out of the structure into the Go local
// variables.
p = parms;
for (int i = 0; i < parm_count; ++i) {
p = getParm(p);
String *ln = Getattr(p, "lname");
String *gn = Getattr(p, "emit:input");
Printv(f->code, "\t", gn, " = swig_a->", ln, ";\n", NULL);
p = nextParm(p);
}
// Apply the in typemaps.
p = parms;
for (int i = 0; i < parm_count; ++i) {
p = getParm(p);
String *tm = Getattr(p, "tmap:in");
if (!tm) {
Swig_warning(WARN_TYPEMAP_IN_UNDEF, input_file, line_number, "Unable to use type %s as a function argument\n", SwigType_str(Getattr(p, "type"), 0));
} else {
String *ln = Getattr(p, "lname");
String *input = NewString("");
Printv(input, "swig_a->", ln, NULL);
tm = Copy(tm);
Replaceall(tm, "$input", input);
Setattr(p, "emit:input", input);
String *gn = Getattr(p, "emit:input");
Replaceall(tm, "$input", gn);
if (i < required_count) {
Printv(f->code, "\t", tm, "\n", NULL);
} else {