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pm: improve resource limit management accuracy

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This change was made for #2255, but the issue creator never confirmed if it resolved the issue.

This *does* better reflect what Nintendo's pm does, though, so I'm going to commit it regardless.
This commit is contained in:
Michael Scire 2024-01-20 13:09:04 -07:00
parent fc16f28d0c
commit e919b80fa2
1 changed files with 12 additions and 6 deletions
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18
stratosphere/pm/source/impl/pm_spec.cpp
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@ -243,29 +243,35 @@ namespace ams::pm::impl {
const u64 boost_size = normal_boost + mitm_boost;
/* Don't allow all application memory to be taken away. */
R_UNLESS(boost_size <= g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_Application], pm::ResultInvalidSize());
R_UNLESS(boost_size < g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_Application], pm::ResultInvalidSize());
const u64 new_app_size = g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_Application] - boost_size;
{
std::scoped_lock lk(g_resource_limit_lock);
const auto cur_boost_size = GetCurrentSystemMemoryBoostSize();
if (hos::GetVersion() >= hos::Version_5_0_0) {
/* Starting in 5.0.0, PM does not allow for only one of the sets to fail. */
if (boost_size < GetCurrentSystemMemoryBoostSize()) {
if (boost_size < cur_boost_size) {
R_TRY(svc::SetUnsafeLimit(boost_size));
R_ABORT_UNLESS(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
} else {
} else if (boost_size > cur_boost_size) {
R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
R_ABORT_UNLESS(svc::SetUnsafeLimit(boost_size));
} else {
/* If the boost size is equal, there's nothing to do. */
}
} else {
const u64 new_sys_size = g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_System] + boost_size;
if (boost_size < GetCurrentSystemMemoryBoostSize()) {
if (boost_size < cur_boost_size) {
R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_System, new_sys_size));
R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
} else if (boost_size > cur_boost_size) {
R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_System, new_sys_size));
} else {
R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_System, new_sys_size));
/* If the boost size is equal, there's nothing to do. */
}
}