From ce05539f20b337221d3310baf73b45317dab067c Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 17 Dec 2018 12:21:09 -0300 Subject: perf trace: Show NULL when syscall pointer args are 0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Matching strace's output format. The 'format' file for the syscall tracepoints have an indication if the arg is a pointer, with some exceptions like 'mmap' that has its first arg as an 'unsigned long', so use a heuristic using the argument name, i.e. if it contains the 'addr' substring, format it with the pointer formatter. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Luis Cláudio Gonçalves Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-ddghemr8qrm6i0sb8awznbze@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 28 ++++++++++++---------------- tools/perf/trace/beauty/beauty.h | 3 +++ 2 files changed, 15 insertions(+), 16 deletions(-) (limited to 'tools/perf') diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 35d8fbe47ee4..6ba8290a0794 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -444,6 +444,13 @@ size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg return scnprintf(bf, size, "%#lx", arg->val); } +size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) +{ + if (arg->val == 0) + return scnprintf(bf, size, "NULL"); + return syscall_arg__scnprintf_hex(bf, size, arg); +} + size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) { return scnprintf(bf, size, "%d", arg->val); @@ -660,7 +667,7 @@ static struct syscall_fmt { { .name = "bpf", .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, { .name = "brk", .hexret = true, - .arg = { [0] = { .scnprintf = SCA_HEX, /* brk */ }, }, }, + .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, { .name = "clock_gettime", .arg = { [0] = STRARRAY(clk_id, clockid), }, }, { .name = "clone", .errpid = true, .nr_args = 5, @@ -738,17 +745,12 @@ static struct syscall_fmt { .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, { .name = "mknodat", .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, - { .name = "mlock", - .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, }, - { .name = "mlockall", - .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, }, { .name = "mmap", .hexret = true, /* The standard mmap maps to old_mmap on s390x */ #if defined(__s390x__) .alias = "old_mmap", #endif - .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, - [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, + .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, }, { .name = "mount", .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, @@ -760,13 +762,7 @@ static struct syscall_fmt { { .name = "mq_unlink", .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, { .name = "mremap", .hexret = true, - .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, - [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, - [4] = { .scnprintf = SCA_HEX, /* new_addr */ }, }, }, - { .name = "munlock", - .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, }, - { .name = "munmap", - .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, }, + .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, { .name = "name_to_handle_at", .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, { .name = "newfstatat", @@ -1350,8 +1346,8 @@ static int syscall__set_arg_fmts(struct syscall *sc) strcmp(field->name, "path") == 0 || strcmp(field->name, "pathname") == 0)) sc->arg_fmt[idx].scnprintf = SCA_FILENAME; - else if (field->flags & TEP_FIELD_IS_POINTER) - sc->arg_fmt[idx].scnprintf = syscall_arg__scnprintf_hex; + else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) + sc->arg_fmt[idx].scnprintf = SCA_PTR; else if (strcmp(field->type, "pid_t") == 0) sc->arg_fmt[idx].scnprintf = SCA_PID; else if (strcmp(field->type, "umode_t") == 0) diff --git a/tools/perf/trace/beauty/beauty.h b/tools/perf/trace/beauty/beauty.h index ac25b6410bc8..1a93d9c626ef 100644 --- a/tools/perf/trace/beauty/beauty.h +++ b/tools/perf/trace/beauty/beauty.h @@ -98,6 +98,9 @@ size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg); #define SCA_HEX syscall_arg__scnprintf_hex +size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg); +#define SCA_PTR syscall_arg__scnprintf_ptr + size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg); #define SCA_INT syscall_arg__scnprintf_int -- cgit v1.2.3