ExternalVendorCode/genode
1
0
Fork 0
mirror of https://github.com/genodelabs/genode.git synced 2024-12-22 06:57:51 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

rm_fault.run: check for write faults on ROM

Browse Source 
Issue #2451
This commit is contained in:
Alexander Boettcher 2017-07-12 13:53:11 +02:00 committed by Christian Helmuth
parent da5441292a
commit 0743ea87ed
1 changed files with 56 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
repos/base/src/test/rm_fault/main.cc
View File

@ -22,6 +22,7 @@
#include <base/child.h>
#include <rm_session/connection.h>
#include <base/attached_ram_dataspace.h>
#include <base/attached_rom_dataspace.h>
using namespace Genode;
@ -30,7 +31,12 @@ using namespace Genode;
** Child **
***********/
enum { MANAGED_ADDR = 0x10000000 };
enum {
MANAGED_ADDR = 0x10000000,
STOP_TEST = 0xdead,
READ_TEST = 0x12345,
WRITE_TEST = READ_TEST - 1
};
void read_at(addr_t addr)
@ -40,9 +46,24 @@ void read_at(addr_t addr)
log("read value ", Hex(value));
}
void modify(addr_t addr)
bool modify(addr_t addr)
{
log("modify memory at ", Hex(addr), " to ", Hex(++(*(int *)addr)));
addr_t const value = *(addr_t volatile *)addr;
if (value == STOP_TEST)
return false;
if (value != READ_TEST + 1)
log("modify memory at ", Hex(addr), " to ",
Hex(++(*(addr_t volatile *)addr)), " ", Hex(value));
if (value != READ_TEST && value != READ_TEST + 1)
{
Genode::error("could modify ROM !!! ", Hex(value));
return false;
}
return true;
}
void main_child()
@ -52,8 +73,7 @@ void main_child()
/* perform illegal access */
read_at(MANAGED_ADDR);
while (true)
modify(MANAGED_ADDR);
while (modify(MANAGED_ADDR));
log("--- child role of region-manager fault test finished ---");
}
@ -137,6 +157,8 @@ struct Main_parent
Heap _heap { _env.ram(), _env.rm() };
Genode::Rom_connection _rom { _env, "config"};
/* parent services */
struct Parent_services : Test_child_policy::Parent_services
{
@ -170,12 +192,25 @@ struct Main_parent
long volatile &_child_value() { return *_ds.local_addr<long volatile>(); }
void _check_for_write_fault(addr_t const child_virt_addr)
{
if (_child_value() == WRITE_TEST) {
_child_value() = STOP_TEST;
Genode::log("got fault on ROM");
_env.parent().exit(0);
return;
}
Genode::log("test WRITE fault on ROM (config)");
_child_value() = WRITE_TEST;
_address_space.attach_at(_rom.dataspace(), child_virt_addr);
}
void _handle_fault()
{
if (_fault_cnt++ == 4) {
log("--- parent role of region-manager fault test finished ---");
_env.parent().exit(0);
}
enum { FAULT_CNT = 4 };
log("received region-map fault signal, request fault state");
@ -188,7 +223,7 @@ struct Main_parent
log("rm session state is ", state_name, ", pf_addr=", Hex(state.addr));
/* ignore spuriuous fault signal */
/* ignore spurious fault signal */
if (state.type == Region_map::State::READY) {
log("ignoring spurious fault signal");
return;
@ -196,14 +231,23 @@ struct Main_parent
addr_t child_virt_addr = state.addr & ~(4096 - 1);
if (_fault_cnt++ >= FAULT_CNT) {
if (_fault_cnt == FAULT_CNT)
log("--- parent role of region-manager fault test finished ---");
_check_for_write_fault(child_virt_addr);
return;
}
/* allocate dataspace to resolve the fault */
log("attach dataspace to the child at ", Hex(child_virt_addr));
_child_value() = 0x1234;
_child_value() = READ_TEST;
_address_space.attach_at(_ds.cap(), child_virt_addr);
/* poll until our child modifies the dataspace content */
while (_child_value() == 0x1234);
while (_child_value() == READ_TEST);
log("child modified dataspace content, new value is ",
Hex(_child_value()));