http://d.puremagic.com/issues/show_bug.cgi?id=8658
Summary: Passing large structs to function b value causes stack
corruption
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: DMD
AssignedTo: nob...@puremagic.com
ReportedBy: r.sagita...@gmx.de
--- Comment #0 from Rainer Schuetze <r.sagita...@gmx.de> 2012-09-14 01:41:33
PDT ---
If the arguments passed to a function exceed 64kB the stack gets corrupted.
Compiling and running this code without optimizations leads to a crash:
struct S
{
int[16385] a;
}
void foo(S s)
{
}
void main()
{
S s;
for(int i = 0; i < 100; i++)
foo(s);
}
This is caused by the frame pointer cleanup only popping the lower 16 bit of
the used stack size:
_D4test3fooFS4test1SZv comdat
assume CS:_D4test3fooFS4test1SZv
ret 4
_D4test3fooFS4test1SZv ends
[Actually I never meant to do this, it happened because I thought I was passing
a class reference.]
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