Patmos simulator fails when calling printf() with multiple cores #18
Description
The Patmos simulator pasim produces an error (unaligned memory access) when the function printf() is called and the number of cores is greater than 1.
To reproduce, write a short Hello World program and execute following commands:
$ cat test.c
#include <stdio.h>
int main() {
printf("Hello world!\n");
return 0;
}
$ patmos-clang test.c
$ pasim a.out
Hello world!
$ pasim -N 2 a.out
[Error] Unaligned memory access: 00000003
00047280<pthread_mutex_init:.LBB163_2:.LBB163_3 + 0x8>: lwm r2 = [r1 + 0]
Cycle : 48930, PC : 0004728c<pthread_mutex_init:.LBB163_2:.LBB163_3 + 0x14>
Stacktrace:
#0 0x471e4 <pthread_mutex_init>(): $rsp 0x6c8 stack cache size 0x780
at 0x4728c (base: 0x47244 <pthread_mutex_init:.LBB163_2:.Ltmp1904 + 0xc>, offset: 0x48 <pthread_mutex_init:.LBB163_2:.LBB163_3 + 0x14>)
t-crest/patmos#1 0x25304 <std>(): $rsp 0x6c8 stack cache size 0x7a0
at 0x253a0 (base: 0x25304 <.LBB46_0:std>, offset: 0x9c <std + 0x9c>)
t-crest/patmos#2 0x24f34 <__sinit>(): $rsp 0x6c8 stack cache size 0x7e0
at 0x25014 (base: 0x24fb4 <__sinit:.LBB38_2:.Ltmp260 + 0xc>, offset: 0x60 <__sinit:.LBB38_2:.Ltmp260 + 0x6c>)
No error is produced if printf() is removed from the program:
$ cat test.c
#include <stdio.h>
int main() {
return 0;
}
$ patmos-clang test.c
$ pasim -N 2 a.out
$ echo $?
0