perf dlfilter: Add al_cleanup()
Add perf_dlfilter_fns.al_cleanup() to do addr_location__exit() on data
passed via perf_dlfilter_fns.resolve_address().
Add dlfilter-test-api-v2 to the "dlfilter C API" test to test it.
Update documentation, clarifying that data returned by APIs should not
be dereferenced after filter_event() and filter_event_early() return.
Fixes: 0dd5041c9a ("perf addr_location: Add init/exit/copy functions")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20230731091857.10681-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
Arnaldo Carvalho de Melo
parent
42c6dd9d23
commit
82b0a10390
@ -64,6 +64,12 @@ internal filtering.
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If implemented, 'filter_description' should return a one-line description
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of the filter, and optionally a longer description.
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Do not assume the 'sample' argument is valid (dereferenceable)
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after 'filter_event' and 'filter_event_early' return.
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Do not assume data referenced by pointers in struct perf_dlfilter_sample
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is valid (dereferenceable) after 'filter_event' and 'filter_event_early' return.
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The perf_dlfilter_sample structure
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@ -150,7 +156,8 @@ struct perf_dlfilter_fns {
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const char *(*srcline)(void *ctx, __u32 *line_number);
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struct perf_event_attr *(*attr)(void *ctx);
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__s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len);
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void *(*reserved[120])(void *);
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void (*al_cleanup)(void *ctx, struct perf_dlfilter_al *al);
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void *(*reserved[119])(void *);
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};
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----
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@ -161,7 +168,8 @@ struct perf_dlfilter_fns {
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'args' returns arguments from --dlarg options.
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'resolve_address' provides information about 'address'. al->size must be set
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before calling. Returns 0 on success, -1 otherwise.
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before calling. Returns 0 on success, -1 otherwise. Call al_cleanup() (if present,
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see below) when 'al' data is no longer needed.
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'insn' returns instruction bytes and length.
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@ -171,6 +179,12 @@ before calling. Returns 0 on success, -1 otherwise.
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'object_code' reads object code and returns the number of bytes read.
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'al_cleanup' must be called (if present, so check perf_dlfilter_fns.al_cleanup != NULL)
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after resolve_address() to free any associated resources.
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Do not assume pointers obtained via perf_dlfilter_fns are valid (dereferenceable)
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after 'filter_event' and 'filter_event_early' return.
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The perf_dlfilter_al structure
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@ -197,9 +211,13 @@ struct perf_dlfilter_al {
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/* Below members are only populated by resolve_ip() */
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__u8 filtered; /* true if this sample event will be filtered out */
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const char *comm;
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void *priv; /* Private data. Do not change */
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};
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----
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Do not assume data referenced by pointers in struct perf_dlfilter_al
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is valid (dereferenceable) after 'filter_event' and 'filter_event_early' return.
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perf_dlfilter_sample flags
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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@ -377,7 +377,7 @@ ifndef NO_JVMTI
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PROGRAMS += $(OUTPUT)$(LIBJVMTI)
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endif
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DLFILTERS := dlfilter-test-api-v0.so dlfilter-show-cycles.so
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DLFILTERS := dlfilter-test-api-v0.so dlfilter-test-api-v2.so dlfilter-show-cycles.so
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DLFILTERS := $(patsubst %,$(OUTPUT)dlfilters/%,$(DLFILTERS))
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# what 'all' will build and 'install' will install, in perfexecdir
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377
tools/perf/dlfilters/dlfilter-test-api-v2.c
Normal file
377
tools/perf/dlfilters/dlfilter-test-api-v2.c
Normal file
@ -0,0 +1,377 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Test v2 API for perf --dlfilter shared object
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* Copyright (c) 2023, Intel Corporation.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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/*
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* Copy v2 API instead of including current API
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*/
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#include <linux/perf_event.h>
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#include <linux/types.h>
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/*
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* The following macro can be used to determine if this header defines
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* perf_dlfilter_sample machine_pid and vcpu.
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*/
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#define PERF_DLFILTER_HAS_MACHINE_PID
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/* Definitions for perf_dlfilter_sample flags */
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enum {
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PERF_DLFILTER_FLAG_BRANCH = 1ULL << 0,
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PERF_DLFILTER_FLAG_CALL = 1ULL << 1,
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PERF_DLFILTER_FLAG_RETURN = 1ULL << 2,
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PERF_DLFILTER_FLAG_CONDITIONAL = 1ULL << 3,
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PERF_DLFILTER_FLAG_SYSCALLRET = 1ULL << 4,
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PERF_DLFILTER_FLAG_ASYNC = 1ULL << 5,
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PERF_DLFILTER_FLAG_INTERRUPT = 1ULL << 6,
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PERF_DLFILTER_FLAG_TX_ABORT = 1ULL << 7,
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PERF_DLFILTER_FLAG_TRACE_BEGIN = 1ULL << 8,
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PERF_DLFILTER_FLAG_TRACE_END = 1ULL << 9,
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PERF_DLFILTER_FLAG_IN_TX = 1ULL << 10,
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PERF_DLFILTER_FLAG_VMENTRY = 1ULL << 11,
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PERF_DLFILTER_FLAG_VMEXIT = 1ULL << 12,
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};
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/*
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* perf sample event information (as per perf script and <linux/perf_event.h>)
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*/
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struct perf_dlfilter_sample {
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__u32 size; /* Size of this structure (for compatibility checking) */
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__u16 ins_lat; /* Refer PERF_SAMPLE_WEIGHT_TYPE in <linux/perf_event.h> */
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__u16 p_stage_cyc; /* Refer PERF_SAMPLE_WEIGHT_TYPE in <linux/perf_event.h> */
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__u64 ip;
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__s32 pid;
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__s32 tid;
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__u64 time;
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__u64 addr;
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__u64 id;
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__u64 stream_id;
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__u64 period;
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__u64 weight; /* Refer PERF_SAMPLE_WEIGHT_TYPE in <linux/perf_event.h> */
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__u64 transaction; /* Refer PERF_SAMPLE_TRANSACTION in <linux/perf_event.h> */
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__u64 insn_cnt; /* For instructions-per-cycle (IPC) */
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__u64 cyc_cnt; /* For instructions-per-cycle (IPC) */
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__s32 cpu;
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__u32 flags; /* Refer PERF_DLFILTER_FLAG_* above */
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__u64 data_src; /* Refer PERF_SAMPLE_DATA_SRC in <linux/perf_event.h> */
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__u64 phys_addr; /* Refer PERF_SAMPLE_PHYS_ADDR in <linux/perf_event.h> */
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__u64 data_page_size; /* Refer PERF_SAMPLE_DATA_PAGE_SIZE in <linux/perf_event.h> */
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__u64 code_page_size; /* Refer PERF_SAMPLE_CODE_PAGE_SIZE in <linux/perf_event.h> */
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__u64 cgroup; /* Refer PERF_SAMPLE_CGROUP in <linux/perf_event.h> */
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__u8 cpumode; /* Refer CPUMODE_MASK etc in <linux/perf_event.h> */
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__u8 addr_correlates_sym; /* True => resolve_addr() can be called */
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__u16 misc; /* Refer perf_event_header in <linux/perf_event.h> */
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__u32 raw_size; /* Refer PERF_SAMPLE_RAW in <linux/perf_event.h> */
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const void *raw_data; /* Refer PERF_SAMPLE_RAW in <linux/perf_event.h> */
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__u64 brstack_nr; /* Number of brstack entries */
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const struct perf_branch_entry *brstack; /* Refer <linux/perf_event.h> */
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__u64 raw_callchain_nr; /* Number of raw_callchain entries */
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const __u64 *raw_callchain; /* Refer <linux/perf_event.h> */
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const char *event;
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__s32 machine_pid;
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__s32 vcpu;
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};
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/*
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* Address location (as per perf script)
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*/
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struct perf_dlfilter_al {
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__u32 size; /* Size of this structure (for compatibility checking) */
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__u32 symoff;
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const char *sym;
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__u64 addr; /* Mapped address (from dso) */
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__u64 sym_start;
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__u64 sym_end;
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const char *dso;
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__u8 sym_binding; /* STB_LOCAL, STB_GLOBAL or STB_WEAK, refer <elf.h> */
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__u8 is_64_bit; /* Only valid if dso is not NULL */
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__u8 is_kernel_ip; /* True if in kernel space */
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__u32 buildid_size;
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__u8 *buildid;
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/* Below members are only populated by resolve_ip() */
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__u8 filtered; /* True if this sample event will be filtered out */
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const char *comm;
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void *priv; /* Private data (v2 API) */
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};
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struct perf_dlfilter_fns {
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/* Return information about ip */
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const struct perf_dlfilter_al *(*resolve_ip)(void *ctx);
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/* Return information about addr (if addr_correlates_sym) */
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const struct perf_dlfilter_al *(*resolve_addr)(void *ctx);
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/* Return arguments from --dlarg option */
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char **(*args)(void *ctx, int *dlargc);
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/*
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* Return information about address (al->size must be set before
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* calling). Returns 0 on success, -1 otherwise. Call al_cleanup()
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* when 'al' data is no longer needed.
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*/
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__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);
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/* Return instruction bytes and length */
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const __u8 *(*insn)(void *ctx, __u32 *length);
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/* Return source file name and line number */
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const char *(*srcline)(void *ctx, __u32 *line_number);
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/* Return perf_event_attr, refer <linux/perf_event.h> */
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struct perf_event_attr *(*attr)(void *ctx);
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/* Read object code, return numbers of bytes read */
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__s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len);
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/*
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* If present (i.e. must check al_cleanup != NULL), call after
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* resolve_address() to free any associated resources. (v2 API)
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*/
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void (*al_cleanup)(void *ctx, struct perf_dlfilter_al *al);
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/* Reserved */
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void *(*reserved[119])(void *);
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};
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struct perf_dlfilter_fns perf_dlfilter_fns;
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static int verbose;
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#define pr_debug(fmt, ...) do { \
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if (verbose > 0) \
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fprintf(stderr, fmt, ##__VA_ARGS__); \
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} while (0)
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static int test_fail(const char *msg)
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{
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pr_debug("%s\n", msg);
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return -1;
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}
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#define CHECK(x) do { \
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if (!(x)) \
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return test_fail("Check '" #x "' failed\n"); \
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} while (0)
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struct filter_data {
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__u64 ip;
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__u64 addr;
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int do_early;
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int early_filter_cnt;
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int filter_cnt;
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};
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static struct filter_data *filt_dat;
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int start(void **data, void *ctx)
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{
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int dlargc;
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char **dlargv;
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struct filter_data *d;
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static bool called;
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verbose = 1;
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CHECK(!filt_dat && !called);
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called = true;
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d = calloc(1, sizeof(*d));
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if (!d)
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test_fail("Failed to allocate memory");
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filt_dat = d;
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*data = d;
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dlargv = perf_dlfilter_fns.args(ctx, &dlargc);
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CHECK(dlargc == 6);
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CHECK(!strcmp(dlargv[0], "first"));
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verbose = strtol(dlargv[1], NULL, 0);
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d->ip = strtoull(dlargv[2], NULL, 0);
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d->addr = strtoull(dlargv[3], NULL, 0);
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d->do_early = strtol(dlargv[4], NULL, 0);
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CHECK(!strcmp(dlargv[5], "last"));
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pr_debug("%s API\n", __func__);
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return 0;
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}
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#define CHECK_SAMPLE(x) do { \
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if (sample->x != expected.x) \
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return test_fail("'" #x "' not expected value\n"); \
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} while (0)
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static int check_sample(struct filter_data *d, const struct perf_dlfilter_sample *sample)
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{
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struct perf_dlfilter_sample expected = {
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.ip = d->ip,
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.pid = 12345,
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.tid = 12346,
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.time = 1234567890,
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.addr = d->addr,
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.id = 99,
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.stream_id = 101,
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.period = 543212345,
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.cpu = 31,
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.cpumode = PERF_RECORD_MISC_USER,
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.addr_correlates_sym = 1,
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.misc = PERF_RECORD_MISC_USER,
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};
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CHECK(sample->size >= sizeof(struct perf_dlfilter_sample));
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CHECK_SAMPLE(ip);
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CHECK_SAMPLE(pid);
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CHECK_SAMPLE(tid);
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CHECK_SAMPLE(time);
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CHECK_SAMPLE(addr);
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CHECK_SAMPLE(id);
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CHECK_SAMPLE(stream_id);
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CHECK_SAMPLE(period);
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CHECK_SAMPLE(cpu);
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CHECK_SAMPLE(cpumode);
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CHECK_SAMPLE(addr_correlates_sym);
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CHECK_SAMPLE(misc);
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CHECK(!sample->raw_data);
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CHECK_SAMPLE(brstack_nr);
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CHECK(!sample->brstack);
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CHECK_SAMPLE(raw_callchain_nr);
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CHECK(!sample->raw_callchain);
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#define EVENT_NAME "branches:"
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CHECK(!strncmp(sample->event, EVENT_NAME, strlen(EVENT_NAME)));
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return 0;
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}
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static int check_al(void *ctx)
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{
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const struct perf_dlfilter_al *al;
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al = perf_dlfilter_fns.resolve_ip(ctx);
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if (!al)
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return test_fail("resolve_ip() failed");
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CHECK(al->sym && !strcmp("foo", al->sym));
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CHECK(!al->symoff);
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return 0;
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}
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static int check_addr_al(void *ctx)
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{
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const struct perf_dlfilter_al *addr_al;
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addr_al = perf_dlfilter_fns.resolve_addr(ctx);
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if (!addr_al)
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return test_fail("resolve_addr() failed");
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CHECK(addr_al->sym && !strcmp("bar", addr_al->sym));
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CHECK(!addr_al->symoff);
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return 0;
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}
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static int check_address_al(void *ctx, const struct perf_dlfilter_sample *sample)
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{
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struct perf_dlfilter_al address_al;
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const struct perf_dlfilter_al *al;
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al = perf_dlfilter_fns.resolve_ip(ctx);
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if (!al)
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return test_fail("resolve_ip() failed");
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address_al.size = sizeof(address_al);
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if (perf_dlfilter_fns.resolve_address(ctx, sample->ip, &address_al))
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return test_fail("resolve_address() failed");
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CHECK(address_al.sym && al->sym);
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CHECK(!strcmp(address_al.sym, al->sym));
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CHECK(address_al.addr == al->addr);
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CHECK(address_al.sym_start == al->sym_start);
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CHECK(address_al.sym_end == al->sym_end);
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CHECK(address_al.dso && al->dso);
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CHECK(!strcmp(address_al.dso, al->dso));
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/* al_cleanup() is v2 API so may not be present */
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if (perf_dlfilter_fns.al_cleanup)
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perf_dlfilter_fns.al_cleanup(ctx, &address_al);
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return 0;
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}
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static int check_attr(void *ctx)
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{
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struct perf_event_attr *attr = perf_dlfilter_fns.attr(ctx);
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CHECK(attr);
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CHECK(attr->type == PERF_TYPE_HARDWARE);
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CHECK(attr->config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS);
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return 0;
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}
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static int do_checks(void *data, const struct perf_dlfilter_sample *sample, void *ctx, bool early)
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{
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struct filter_data *d = data;
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CHECK(data && filt_dat == data);
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if (early) {
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CHECK(!d->early_filter_cnt);
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d->early_filter_cnt += 1;
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} else {
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CHECK(!d->filter_cnt);
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CHECK(d->early_filter_cnt);
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CHECK(d->do_early != 2);
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d->filter_cnt += 1;
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}
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if (check_sample(data, sample))
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return -1;
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if (check_attr(ctx))
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return -1;
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if (early && !d->do_early)
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return 0;
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if (check_al(ctx) || check_addr_al(ctx) || check_address_al(ctx, sample))
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return -1;
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if (early)
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return d->do_early == 2;
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return 1;
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}
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int filter_event_early(void *data, const struct perf_dlfilter_sample *sample, void *ctx)
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{
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pr_debug("%s API\n", __func__);
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return do_checks(data, sample, ctx, true);
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}
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int filter_event(void *data, const struct perf_dlfilter_sample *sample, void *ctx)
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{
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pr_debug("%s API\n", __func__);
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return do_checks(data, sample, ctx, false);
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}
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int stop(void *data, void *ctx)
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{
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static bool called;
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pr_debug("%s API\n", __func__);
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CHECK(data && filt_dat == data && !called);
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called = true;
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free(data);
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filt_dat = NULL;
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return 0;
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}
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|
||||
const char *filter_description(const char **long_description)
|
||||
{
|
||||
*long_description = "Filter used by the 'dlfilter C API' perf test";
|
||||
return "dlfilter to test v2 C API";
|
||||
}
|
||||
@ -91,6 +91,7 @@ struct perf_dlfilter_al {
|
||||
/* Below members are only populated by resolve_ip() */
|
||||
__u8 filtered; /* True if this sample event will be filtered out */
|
||||
const char *comm;
|
||||
void *priv; /* Private data. Do not change */
|
||||
};
|
||||
|
||||
struct perf_dlfilter_fns {
|
||||
@ -102,7 +103,8 @@ struct perf_dlfilter_fns {
|
||||
char **(*args)(void *ctx, int *dlargc);
|
||||
/*
|
||||
* Return information about address (al->size must be set before
|
||||
* calling). Returns 0 on success, -1 otherwise.
|
||||
* calling). Returns 0 on success, -1 otherwise. Call al_cleanup()
|
||||
* when 'al' data is no longer needed.
|
||||
*/
|
||||
__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);
|
||||
/* Return instruction bytes and length */
|
||||
@ -113,8 +115,13 @@ struct perf_dlfilter_fns {
|
||||
struct perf_event_attr *(*attr)(void *ctx);
|
||||
/* Read object code, return numbers of bytes read */
|
||||
__s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len);
|
||||
/*
|
||||
* If present (i.e. must check al_cleanup != NULL), call after
|
||||
* resolve_address() to free any associated resources.
|
||||
*/
|
||||
void (*al_cleanup)(void *ctx, struct perf_dlfilter_al *al);
|
||||
/* Reserved */
|
||||
void *(*reserved[120])(void *);
|
||||
void *(*reserved[119])(void *);
|
||||
};
|
||||
|
||||
/*
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Test dlfilter C API. A perf.data file is synthesized and then processed
|
||||
* by perf script with a dlfilter named dlfilter-test-api-v0.so. Also a C file
|
||||
* by perf script with dlfilters named dlfilter-test-api-v*.so. Also a C file
|
||||
* is compiled to provide a dso to match the synthesized perf.data file.
|
||||
*/
|
||||
|
||||
@ -37,6 +37,8 @@
|
||||
|
||||
#define MAP_START 0x400000
|
||||
|
||||
#define DLFILTER_TEST_NAME_MAX 128
|
||||
|
||||
struct test_data {
|
||||
struct perf_tool tool;
|
||||
struct machine *machine;
|
||||
@ -45,6 +47,8 @@ struct test_data {
|
||||
u64 bar;
|
||||
u64 ip;
|
||||
u64 addr;
|
||||
char name[DLFILTER_TEST_NAME_MAX];
|
||||
char desc[DLFILTER_TEST_NAME_MAX];
|
||||
char perf[PATH_MAX];
|
||||
char perf_data_file_name[PATH_MAX];
|
||||
char c_file_name[PATH_MAX];
|
||||
@ -215,7 +219,7 @@ static int write_prog(char *file_name)
|
||||
return err ? -1 : 0;
|
||||
}
|
||||
|
||||
static int get_dlfilters_path(char *buf, size_t sz)
|
||||
static int get_dlfilters_path(const char *name, char *buf, size_t sz)
|
||||
{
|
||||
char perf[PATH_MAX];
|
||||
char path[PATH_MAX];
|
||||
@ -224,12 +228,12 @@ static int get_dlfilters_path(char *buf, size_t sz)
|
||||
|
||||
perf_exe(perf, sizeof(perf));
|
||||
perf_path = dirname(perf);
|
||||
snprintf(path, sizeof(path), "%s/dlfilters/dlfilter-test-api-v0.so", perf_path);
|
||||
snprintf(path, sizeof(path), "%s/dlfilters/%s", perf_path, name);
|
||||
if (access(path, R_OK)) {
|
||||
exec_path = get_argv_exec_path();
|
||||
if (!exec_path)
|
||||
return -1;
|
||||
snprintf(path, sizeof(path), "%s/dlfilters/dlfilter-test-api-v0.so", exec_path);
|
||||
snprintf(path, sizeof(path), "%s/dlfilters/%s", exec_path, name);
|
||||
free(exec_path);
|
||||
if (access(path, R_OK))
|
||||
return -1;
|
||||
@ -244,9 +248,9 @@ static int check_filter_desc(struct test_data *td)
|
||||
char *desc = NULL;
|
||||
int ret;
|
||||
|
||||
if (get_filter_desc(td->dlfilters, "dlfilter-test-api-v0.so", &desc, &long_desc) &&
|
||||
if (get_filter_desc(td->dlfilters, td->name, &desc, &long_desc) &&
|
||||
long_desc && !strcmp(long_desc, "Filter used by the 'dlfilter C API' perf test") &&
|
||||
desc && !strcmp(desc, "dlfilter to test v0 C API"))
|
||||
desc && !strcmp(desc, td->desc))
|
||||
ret = 0;
|
||||
else
|
||||
ret = -1;
|
||||
@ -284,7 +288,7 @@ static int get_ip_addr(struct test_data *td)
|
||||
static int do_run_perf_script(struct test_data *td, int do_early)
|
||||
{
|
||||
return system_cmd("%s script -i %s "
|
||||
"--dlfilter %s/dlfilter-test-api-v0.so "
|
||||
"--dlfilter %s/%s "
|
||||
"--dlarg first "
|
||||
"--dlarg %d "
|
||||
"--dlarg %" PRIu64 " "
|
||||
@ -292,7 +296,7 @@ static int do_run_perf_script(struct test_data *td, int do_early)
|
||||
"--dlarg %d "
|
||||
"--dlarg last",
|
||||
td->perf, td->perf_data_file_name, td->dlfilters,
|
||||
verbose, td->ip, td->addr, do_early);
|
||||
td->name, verbose, td->ip, td->addr, do_early);
|
||||
}
|
||||
|
||||
static int run_perf_script(struct test_data *td)
|
||||
@ -321,7 +325,7 @@ static int test__dlfilter_test(struct test_data *td)
|
||||
u64 id = 99;
|
||||
int err;
|
||||
|
||||
if (get_dlfilters_path(td->dlfilters, PATH_MAX))
|
||||
if (get_dlfilters_path(td->name, td->dlfilters, PATH_MAX))
|
||||
return test_result("dlfilters not found", TEST_SKIP);
|
||||
|
||||
if (check_filter_desc(td))
|
||||
@ -399,14 +403,18 @@ static void test_data__free(struct test_data *td)
|
||||
}
|
||||
}
|
||||
|
||||
static int test__dlfilter(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
|
||||
static int test__dlfilter_ver(int ver)
|
||||
{
|
||||
struct test_data td = {.fd = -1};
|
||||
int pid = getpid();
|
||||
int err;
|
||||
|
||||
pr_debug("\n-- Testing version %d API --\n", ver);
|
||||
|
||||
perf_exe(td.perf, sizeof(td.perf));
|
||||
|
||||
snprintf(td.name, sizeof(td.name), "dlfilter-test-api-v%d.so", ver);
|
||||
snprintf(td.desc, sizeof(td.desc), "dlfilter to test v%d C API", ver);
|
||||
snprintf(td.perf_data_file_name, PATH_MAX, "/tmp/dlfilter-test-%u-perf-data", pid);
|
||||
snprintf(td.c_file_name, PATH_MAX, "/tmp/dlfilter-test-%u-prog.c", pid);
|
||||
snprintf(td.prog_file_name, PATH_MAX, "/tmp/dlfilter-test-%u-prog", pid);
|
||||
@ -416,4 +424,14 @@ static int test__dlfilter(struct test_suite *test __maybe_unused, int subtest __
|
||||
return err;
|
||||
}
|
||||
|
||||
static int test__dlfilter(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
|
||||
{
|
||||
int err = test__dlfilter_ver(0);
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
/* No test for version 1 */
|
||||
return test__dlfilter_ver(2);
|
||||
}
|
||||
|
||||
DEFINE_SUITE("dlfilter C API", dlfilter);
|
||||
|
||||
@ -10,6 +10,8 @@
|
||||
#include <subcmd/exec-cmd.h>
|
||||
#include <linux/zalloc.h>
|
||||
#include <linux/build_bug.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/string.h>
|
||||
|
||||
#include "debug.h"
|
||||
#include "event.h"
|
||||
@ -63,6 +65,7 @@ static void al_to_d_al(struct addr_location *al, struct perf_dlfilter_al *d_al)
|
||||
d_al->addr = al->addr;
|
||||
d_al->comm = NULL;
|
||||
d_al->filtered = 0;
|
||||
d_al->priv = NULL;
|
||||
}
|
||||
|
||||
static struct addr_location *get_al(struct dlfilter *d)
|
||||
@ -151,6 +154,11 @@ static char **dlfilter__args(void *ctx, int *dlargc)
|
||||
return d->dlargv;
|
||||
}
|
||||
|
||||
static bool has_priv(struct perf_dlfilter_al *d_al_p)
|
||||
{
|
||||
return d_al_p->size >= offsetof(struct perf_dlfilter_al, priv) + sizeof(d_al_p->priv);
|
||||
}
|
||||
|
||||
static __s32 dlfilter__resolve_address(void *ctx, __u64 address, struct perf_dlfilter_al *d_al_p)
|
||||
{
|
||||
struct dlfilter *d = (struct dlfilter *)ctx;
|
||||
@ -177,9 +185,29 @@ static __s32 dlfilter__resolve_address(void *ctx, __u64 address, struct perf_dlf
|
||||
memcpy(d_al_p, &d_al, min((size_t)sz, sizeof(d_al)));
|
||||
d_al_p->size = sz;
|
||||
|
||||
if (has_priv(d_al_p))
|
||||
d_al_p->priv = memdup(&al, sizeof(al));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void dlfilter__al_cleanup(void *ctx __maybe_unused, struct perf_dlfilter_al *d_al_p)
|
||||
{
|
||||
struct addr_location *al;
|
||||
|
||||
/* Ensure backward compatibility */
|
||||
if (!has_priv(d_al_p) || !d_al_p->priv)
|
||||
return;
|
||||
|
||||
al = d_al_p->priv;
|
||||
|
||||
d_al_p->priv = NULL;
|
||||
|
||||
addr_location__exit(al);
|
||||
|
||||
free(al);
|
||||
}
|
||||
|
||||
static const __u8 *dlfilter__insn(void *ctx, __u32 *len)
|
||||
{
|
||||
struct dlfilter *d = (struct dlfilter *)ctx;
|
||||
@ -297,6 +325,7 @@ static const struct perf_dlfilter_fns perf_dlfilter_fns = {
|
||||
.resolve_addr = dlfilter__resolve_addr,
|
||||
.args = dlfilter__args,
|
||||
.resolve_address = dlfilter__resolve_address,
|
||||
.al_cleanup = dlfilter__al_cleanup,
|
||||
.insn = dlfilter__insn,
|
||||
.srcline = dlfilter__srcline,
|
||||
.attr = dlfilter__attr,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user