int main(int argc, char ** argv)
{
char * name = "parent";
if (argc == 1) {
const char * args[3];
char uri[20], uri2[20];
snprintf(uri2, 20, "file:%s", argv[0]);
args[0] = "Ipc";
args[1] = uri;
args[2] = NULL;
void * mem = (void *) DkVirtualMemoryAlloc(NULL,
pal_control.alloc_align, 0,
PAL_PROT_READ|PAL_PROT_WRITE);
pal_printf("mem = %p\n", mem);
snprintf((char *) mem, 4096, "Hello World");
PAL_NUM key = 0;
PAL_HANDLE chdl = DkCreatePhysicalMemoryChannel(&key);
if (chdl == NULL) {
pal_printf ("(parent) DkCreatePhysicalMemoryChannel Failed,"
" Make sure gipc module is loaded\n");
return 0;
}
snprintf(uri, 20, "gipc:%lld", key);
PAL_HANDLE phdl = DkProcessCreate(uri2, 0, args);
if (phdl == NULL)
pal_printf ("ProcessCreate Failed\n");
PAL_PTR addr = (PAL_PTR) mem;
PAL_NUM size = pal_control.alloc_align;
DkPhysicalMemoryCommit(chdl, 1, &addr, &size, 0);
DkObjectClose(chdl);
char x;
int rv = DkStreamRead(phdl, 0, 1, &x, NULL, 0);
if (rv != 1) {
pal_printf("Failed to get exit signal from child, %d\n", rv);
return -1;
}
}
else {
name = argv[1];
PAL_HANDLE chdl = DkStreamOpen(name, 0, 0, 0, 0);
if (chdl == NULL) {
pal_printf("(child) StreamOpen Failed\n");
return 0;
}
PAL_PTR addr = NULL;
PAL_NUM size = pal_control.alloc_align;
PAL_FLG prot = PAL_PROT_READ|PAL_PROT_WRITE;
int len = DkPhysicalMemoryMap (chdl, 1, &addr, &size, &prot);
if (!len) {
pal_printf("PhysicalMemoryMap Failed\n");
return 0;
}
pal_printf("(child) mem = %p\n", addr);
pal_printf("(child) receive string: %s\n", (char *) addr);
DkStreamDelete(chdl, 0);
DkObjectClose(chdl);
// Write a byte to the parent
int rv = DkStreamWrite(pal_control.parent_process, 0, 1, "z", NULL);
if (rv < 0) {
pal_printf("Failed to write an exit byte\n");
return -1;
}
}
pal_printf("Enter Main Thread (%s)\n", name);
DkThreadDelayExecution (3000);
pal_printf("Leave Main Thread\n");
return 0;
}
int main (int argc, char ** argv, char ** envp)
{
char gipc_uri[20];
int ret;
DkSetExceptionHandler(handler, PAL_EVENT_MEMFAULT);
if (argc > 1 && !memcmp(argv[1], "Child", 6)) {
/* private memory */
ret = DkStreamRead(pal_control.parent_process, 0, 20, gipc_uri,
NULL, 0);
if (ret > 0) {
PAL_HANDLE ipc1 = DkStreamOpen(gipc_uri, 0, 0, 0, 0);
if (ipc1) {
pal_printf("Join Physical Memory Store OK\n");
PAL_PTR mem_addr = 0;
PAL_NUM mem_size = UNIT;
PAL_FLG mem_prot = PAL_PROT_READ|PAL_PROT_WRITE;
ret = DkPhysicalMemoryMap(ipc1, 1, &mem_addr, &mem_size,
&mem_prot);
if (ret > 0) {
pal_printf("[Test 1] Physical Memory Map : %s\n",
(char *) mem_addr);
memcpy((void *) mem_addr, "Hello World, Bob", 20);
pal_printf("[Test 1] Receiver After Map : %s\n",
(char *) mem_addr);
}
ret = 0;
DkStreamWrite(pal_control.parent_process, 0, sizeof(int),
&ret, NULL);
DkObjectClose(ipc1);
}
}
/* private untouched memory */
ret = DkStreamRead(pal_control.parent_process, 0, 20, gipc_uri,
NULL, 0);
if (ret > 0) {
PAL_HANDLE ipc2 = DkStreamOpen(gipc_uri, 0, 0, 0, 0);
if (ipc2) {
pal_printf("Join Physical Memory Store OK\n");
PAL_PTR mem_addr = 0;
PAL_NUM mem_size = UNIT;
PAL_FLG mem_prot = PAL_PROT_READ|PAL_PROT_WRITE;
ret = DkPhysicalMemoryMap(ipc2, 1, &mem_addr, &mem_size,
&mem_prot);
if (ret > 0) {
pal_printf("[Test 2] Physical Memory Map : %s\n",
(char *) mem_addr);
memcpy((void *) mem_addr, "Hello World, Bob", 20);
pal_printf("[Test 2] Receiver After Map : %s\n",
(char *) mem_addr);
}
ret = 0;
DkStreamWrite(pal_control.parent_process, 0, sizeof(int),
&ret, NULL);
DkStreamDelete(ipc2, 0);
DkObjectClose(ipc2);
}
}
/* file-backed memory */
ret = DkStreamRead(pal_control.parent_process, 0, 20, gipc_uri,
NULL, 0);
if (ret > 0) {
PAL_HANDLE ipc3 = DkStreamOpen(gipc_uri, 0, 0, 0, 0);
if (ipc3) {
pal_printf("Join Physical Memory Store OK\n");
PAL_PTR mem_addr = 0;
PAL_NUM mem_size = UNIT;
PAL_FLG mem_prot = PAL_PROT_READ|PAL_PROT_WRITE;
ret = DkPhysicalMemoryMap(ipc3, 1, &mem_addr, &mem_size,
&mem_prot);
if (ret > 0) {
pal_printf("[Test 3] Physical Memory Map : %s\n",
(char *) mem_addr);
memcpy((void *) mem_addr, "Hello World, Bob", 20);
pal_printf("[Test 3] Receiver After Map : %s\n",
(char *) mem_addr);
}
ret = 0;
DkStreamWrite(pal_control.parent_process, 0, sizeof(int),
&ret, NULL);
DkObjectClose(ipc3);
}
}
/* file-backed memory beyond file size */
ret = DkStreamRead(pal_control.parent_process, 0, 20, gipc_uri,
NULL, 0);
if (ret > 0) {
PAL_HANDLE ipc4 = DkStreamOpen(gipc_uri, 0, 0, 0, 0);
if (ipc4) {
pal_printf("Join Physical Memory Store OK\n");
PAL_PTR mem_addr = 0;
PAL_NUM mem_size = UNIT;
PAL_FLG mem_prot = PAL_PROT_READ|PAL_PROT_WRITE;
ret = DkPhysicalMemoryMap(ipc4, 1, &mem_addr, &mem_size,
&mem_prot);
if (ret > 0) {
message = "[Test 4] Physical Memory Map : Memory Fault\n";
*(volatile int *) mem_addr;
__asm__ volatile("nop");
message = NULL;
}
ret = 0;
DkStreamWrite(pal_control.parent_process, 0, sizeof(int),
&ret, NULL);
DkObjectClose(ipc4);
}
