diff options
| -rw-r--r-- | tools/perf/util/trace-event-read.c | 80 |
1 files changed, 57 insertions, 23 deletions
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c index 22ded8000ef6..877706bd454f 100644 --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -46,7 +46,7 @@ static int long_size; static ssize_t calc_data_size; static bool repipe; -static int do_read(int fd, void *buf, int size) +static int __do_read(int fd, void *buf, int size) { int rsize = size; @@ -59,8 +59,10 @@ static int do_read(int fd, void *buf, int size) if (repipe) { int retw = write(STDOUT_FILENO, buf, ret); - if (retw <= 0 || retw != ret) - die("repiping input file"); + if (retw <= 0 || retw != ret) { + pr_debug("repiping input file"); + return -1; + } } size -= ret; @@ -70,14 +72,16 @@ static int do_read(int fd, void *buf, int size) return rsize; } -static int read_or_die(void *data, int size) +static int do_read(void *data, int size) { int r; - r = do_read(input_fd, data, size); - if (r <= 0) - die("reading input file (size expected=%d received=%d)", - size, r); + r = __do_read(input_fd, data, size); + if (r <= 0) { + pr_debug("reading input file (size expected=%d received=%d)", + size, r); + return -1; + } if (calc_data_size) calc_data_size += r; @@ -93,7 +97,7 @@ static void skip(int size) while (size) { r = size > BUFSIZ ? BUFSIZ : size; - read_or_die(buf, r); + do_read(buf, r); size -= r; }; } @@ -102,7 +106,8 @@ static unsigned int read4(struct pevent *pevent) { unsigned int data; - read_or_die(&data, 4); + if (do_read(&data, 4) < 0) + return 0; return __data2host4(pevent, data); } @@ -110,7 +115,8 @@ static unsigned long long read8(struct pevent *pevent) { unsigned long long data; - read_or_die(&data, 8); + if (do_read(&data, 8) < 0) + return 0; return __data2host8(pevent, data); } @@ -166,7 +172,10 @@ static int read_proc_kallsyms(struct pevent *pevent) if (buf == NULL) return -1; - read_or_die(buf, size); + if (do_read(buf, size) < 0) { + free(buf); + return -1; + } buf[size] = '\0'; parse_proc_kallsyms(pevent, buf, size); @@ -180,6 +189,7 @@ static int read_ftrace_printk(struct pevent *pevent) unsigned int size; char *buf; + /* it can have 0 size */ size = read4(pevent); if (!size) return 0; @@ -188,7 +198,10 @@ static int read_ftrace_printk(struct pevent *pevent) if (buf == NULL) return -1; - read_or_die(buf, size); + if (do_read(buf, size) < 0) { + free(buf); + return -1; + } parse_ftrace_printk(pevent, buf, size); @@ -201,8 +214,10 @@ static int read_header_files(struct pevent *pevent) unsigned long long size; char *header_event; char buf[BUFSIZ]; + int ret = 0; - read_or_die(buf, 12); + if (do_read(buf, 12) < 0) + return -1; if (memcmp(buf, "header_page", 12) != 0) die("did not read header page"); @@ -216,7 +231,9 @@ static int read_header_files(struct pevent *pevent) */ long_size = header_page_size_size; - read_or_die(buf, 13); + if (do_read(buf, 13) < 0) + return -1; + if (memcmp(buf, "header_event", 13) != 0) die("did not read header event"); @@ -225,9 +242,11 @@ static int read_header_files(struct pevent *pevent) if (header_event == NULL) return -1; - read_or_die(header_event, size); + if (do_read(header_event, size) < 0) + ret = -1; + free(header_event); - return 0; + return ret; } static int read_ftrace_file(struct pevent *pevent, unsigned long long size) @@ -238,7 +257,11 @@ static int read_ftrace_file(struct pevent *pevent, unsigned long long size) if (buf == NULL) return -1; - read_or_die(buf, size); + if (do_read(buf, size) < 0) { + free(buf); + return -1; + } + parse_ftrace_file(pevent, buf, size); free(buf); return 0; @@ -253,7 +276,11 @@ static int read_event_file(struct pevent *pevent, char *sys, if (buf == NULL) return -1; - read_or_die(buf, size); + if (do_read(buf, size) < 0) { + free(buf); + return -1; + } + parse_event_file(pevent, buf, size, sys); free(buf); return 0; @@ -294,6 +321,7 @@ static int read_event_files(struct pevent *pevent) return -1; count = read4(pevent); + for (x=0; x < count; x++) { size = read8(pevent); ret = read_event_file(pevent, sys, size); @@ -323,11 +351,13 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe) input_fd = fd; - read_or_die(buf, 3); + if (do_read(buf, 3) < 0) + return -1; if (memcmp(buf, test, 3) != 0) die("no trace data in the file"); - read_or_die(buf, 7); + if (do_read(buf, 7) < 0) + return -1; if (memcmp(buf, "tracing", 7) != 0) die("not a trace file (missing 'tracing' tag)"); @@ -338,7 +368,8 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe) printf("version = %s\n", version); free(version); - read_or_die(buf, 1); + if (do_read(buf, 1) < 0) + return -1; file_bigendian = buf[0]; host_bigendian = bigendian(); @@ -348,10 +379,13 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe) goto out; } - read_or_die(buf, 1); + if (do_read(buf, 1) < 0) + goto out; long_size = buf[0]; page_size = read4(pevent); + if (!page_size) + goto out; err = read_header_files(pevent); if (err) |