diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 12 | ||||
| -rw-r--r-- | lib/ref_tracker.c | 19 |
2 files changed, 26 insertions, 5 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 14b89aa37c5c..1555da672275 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -296,7 +296,7 @@ config DEBUG_INFO_DWARF4 config DEBUG_INFO_DWARF5 bool "Generate DWARF Version 5 debuginfo" depends on !CC_IS_CLANG || (CC_IS_CLANG && (AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502))) - depends on !DEBUG_INFO_BTF + depends on !DEBUG_INFO_BTF || PAHOLE_VERSION >= 121 help Generate DWARF v5 debug info. Requires binutils 2.35.2, gcc 5.0+ (gcc 5.0+ accepts the -gdwarf-5 flag but only had partial support for some @@ -323,7 +323,15 @@ config DEBUG_INFO_BTF DWARF type info into equivalent deduplicated BTF type info. config PAHOLE_HAS_SPLIT_BTF - def_bool $(success, test `$(PAHOLE) --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/'` -ge "119") + def_bool PAHOLE_VERSION >= 119 + +config PAHOLE_HAS_BTF_TAG + def_bool PAHOLE_VERSION >= 123 + depends on CC_IS_CLANG + help + Decide whether pahole emits btf_tag attributes (btf_type_tag and + btf_decl_tag) or not. Currently only clang compiler implements + these attributes, so make the config depend on CC_IS_CLANG. config DEBUG_INFO_BTF_MODULES def_bool y diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index a6789c0c626b..dc7b14aa3431 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -20,6 +20,7 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir) unsigned long flags; bool leak = false; + dir->dead = true; spin_lock_irqsave(&dir->lock, flags); list_for_each_entry_safe(tracker, n, &dir->quarantine, head) { list_del(&tracker->head); @@ -37,6 +38,7 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir) spin_unlock_irqrestore(&dir->lock, flags); WARN_ON_ONCE(leak); WARN_ON_ONCE(refcount_read(&dir->untracked) != 1); + WARN_ON_ONCE(refcount_read(&dir->no_tracker) != 1); } EXPORT_SYMBOL(ref_tracker_dir_exit); @@ -72,6 +74,12 @@ int ref_tracker_alloc(struct ref_tracker_dir *dir, gfp_t gfp_mask = gfp; unsigned long flags; + WARN_ON_ONCE(dir->dead); + + if (!trackerp) { + refcount_inc(&dir->no_tracker); + return 0; + } if (gfp & __GFP_DIRECT_RECLAIM) gfp_mask |= __GFP_NOFAIL; *trackerp = tracker = kzalloc(sizeof(*tracker), gfp_mask); @@ -81,7 +89,6 @@ int ref_tracker_alloc(struct ref_tracker_dir *dir, return -ENOMEM; } nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 1); - nr_entries = filter_irq_stacks(entries, nr_entries); tracker->alloc_stack_handle = stack_depot_save(entries, nr_entries, gfp); spin_lock_irqsave(&dir->lock, flags); @@ -95,17 +102,23 @@ int ref_tracker_free(struct ref_tracker_dir *dir, struct ref_tracker **trackerp) { unsigned long entries[REF_TRACKER_STACK_ENTRIES]; - struct ref_tracker *tracker = *trackerp; depot_stack_handle_t stack_handle; + struct ref_tracker *tracker; unsigned int nr_entries; unsigned long flags; + WARN_ON_ONCE(dir->dead); + + if (!trackerp) { + refcount_dec(&dir->no_tracker); + return 0; + } + tracker = *trackerp; if (!tracker) { refcount_dec(&dir->untracked); return -EEXIST; } nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 1); - nr_entries = filter_irq_stacks(entries, nr_entries); stack_handle = stack_depot_save(entries, nr_entries, GFP_ATOMIC); spin_lock_irqsave(&dir->lock, flags); |