From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 2 Sep 2026 15:31:14 -0700 Subject: treewide: refresh kmalloc_obj() conversions This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook --- tools/perf/util/target.h | 98 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 tools/perf/util/target.h (limited to 'tools/perf/util/target.h') diff --git a/tools/perf/util/target.h b/tools/perf/util/target.h new file mode 100644 index 000000000..bc2bff9c6 --- /dev/null +++ b/tools/perf/util/target.h @@ -0,0 +1,98 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _PERF_TARGET_H +#define _PERF_TARGET_H + +#include +#include + +struct target { + const char *pid; + const char *tid; + const char *cpu_list; + const char *bpf_str; + bool system_wide; + bool uses_mmap; + bool default_per_cpu; + bool per_thread; + bool use_bpf; + bool inherit; + int initial_delay; + const char *attr_map; +}; + +enum target_errno { + TARGET_ERRNO__SUCCESS = 0, + + /* + * Choose an arbitrary negative big number not to clash with standard + * errno since SUS requires the errno has distinct positive values. + * See 'Issue 6' in the link below. + * + * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html + */ + __TARGET_ERRNO__START = -10000, + + /* for target__validate() */ + TARGET_ERRNO__PID_OVERRIDE_CPU = __TARGET_ERRNO__START, + TARGET_ERRNO__PID_OVERRIDE_SYSTEM, + TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD, + TARGET_ERRNO__BPF_OVERRIDE_CPU, + TARGET_ERRNO__BPF_OVERRIDE_PID, + TARGET_ERRNO__BPF_OVERRIDE_THREAD, + + __TARGET_ERRNO__END, +}; + +enum target_errno target__validate(struct target *target); + +uid_t parse_uid(const char *str); + +int target__strerror(struct target *target, int errnum, char *buf, size_t buflen); + +static inline bool target__has_task(const struct target *target) +{ + return target->tid || target->pid; +} + +static inline bool target__has_cpu(const struct target *target) +{ + return target->system_wide || target->cpu_list; +} + +static inline bool target__none(const struct target *target) +{ + return !target__has_task(target) && !target__has_cpu(target); +} + +static inline bool target__enable_on_exec(const struct target *target) +{ + /* + * Normally enable_on_exec should be set if: + * 1) The tracee process is forked (not attaching to existed task or cpu). + * 2) And initial_delay is not configured. + * Otherwise, we enable tracee events manually. + */ + return target__none(target) && !target->initial_delay; +} + +static inline bool target__has_per_thread(const struct target *target) +{ + return target->system_wide && target->per_thread; +} + +static inline bool target__uses_dummy_map(const struct target *target) +{ + bool use_dummy = false; + + if (target->default_per_cpu) + use_dummy = target->per_thread ? true : false; + else if (target__has_task(target) || + (!target__has_cpu(target) && !target->uses_mmap)) + use_dummy = true; + else if (target__has_per_thread(target)) + use_dummy = true; + + return use_dummy; +} + +#endif /* _PERF_TARGET_H */ -- cgit v1.3.1