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noux: lock region list

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Issue #485
This commit is contained in:
Alexander Boettcher 2013-09-12 21:25:22 +02:00 committed by Norman Feske
parent bbb9c6daec
commit 7c591a8151
1 changed files with 45 additions and 28 deletions
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73
ports/src/noux/rm_session_component.h
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@ -66,6 +66,7 @@ namespace Noux {
inline void dissolve(Dataspace_info &ds);
};
Lock _region_lock;
List<Region> _regions;
Region *_lookup_region_by_addr(addr_t local_addr)
@ -115,6 +116,7 @@ namespace Noux {
Dataspace_registry &ds_registry,
Rpc_entrypoint &ep)
{
Lock::Guard guard(_region_lock);
for (Region *curr = _regions.first(); curr; curr = curr->next_region()) {
Dataspace_capability ds;
@ -163,34 +165,44 @@ namespace Noux {
void poke(addr_t dst_addr, void const *src, size_t len)
{
Region *region = _lookup_region_by_addr(dst_addr);
if (!region) {
PERR("poke: no region at 0x%lx", dst_addr);
return;
Dataspace_capability ds_cap;
addr_t local_addr;
{
Lock::Guard guard(_region_lock);
Region *region = _lookup_region_by_addr(dst_addr);
if (!region) {
PERR("poke: no region at 0x%lx", dst_addr);
return;
}
/*
* Test if start and end address occupied by the object
* type refers to the same region.
*/
if (region != _lookup_region_by_addr(dst_addr + len - 1)) {
PERR("attempt to write beyond region boundary");
return;
}
if (region->offset) {
PERR("poke: writing to region with offset is not supported");
return;
}
ds_cap = region->ds;
local_addr = region->local_addr;
}
/*
* Test if start and end address occupied by the object
* type refers to the same region.
*/
if (region != _lookup_region_by_addr(dst_addr + len - 1)) {
PERR("attempt to write beyond region boundary");
return;
}
Object_pool<Dataspace_info>::Guard info(_ds_registry.lookup_info(region->ds));
Object_pool<Dataspace_info>::Guard info(_ds_registry.lookup_info(ds_cap));
if (!info) {
PERR("attempt to write to unknown dataspace type");
for (;;);
return;
}
if (region->offset) {
PERR("poke: writing to region with offset is not supported");
return;
}
info->poke(dst_addr - region->local_addr, src, len);
info->poke(dst_addr - local_addr, src, len);
}
@ -205,7 +217,7 @@ namespace Noux {
bool executable = false)
{
/*
* Rm_session substracts offset from size if size is 0
* Rm_session subtracts offset from size if size is 0
*/
if (size == 0)
size = Dataspace_client(ds).size() - offset;
@ -237,6 +249,7 @@ namespace Noux {
* Record attachment for later replay (needed during
* fork)
*/
Lock::Guard guard(_region_lock);
_regions.insert(region);
@ -245,14 +258,18 @@ namespace Noux {
void detach(Local_addr local_addr)
{
Region *region = _lookup_region_by_addr(local_addr);
if (!region) {
PWRN("Attempt to detach unknown region at 0x%p",
(void *)local_addr);
return;
}
Region * region = 0;
{
Lock::Guard guard(_region_lock);
region = _lookup_region_by_addr(local_addr);
if (!region) {
PWRN("Attempt to detach unknown region at 0x%p",
(void *)local_addr);
return;
}
_regions.remove(region);
_regions.remove(region);
}
{
Object_pool<Dataspace_info>::Guard info(_ds_registry.lookup_info(region->ds));