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syscall-dump: add TID (thread id) to log

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This commit is contained in:
Jaroslav Kysela 2015-04-03 14:42:59 +02:00
parent 86d10bd82b
commit 1ba0f93d81
1 changed files with 12 additions and 1 deletions
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13
tools/syscall-dump.c
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@ -16,6 +16,7 @@ Usage:
#include <sys/types.h> #include <sys/types.h>
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h> #include <unistd.h>
#include <stdlib.h> #include <stdlib.h>
#include <stddef.h> #include <stddef.h>
@ -31,6 +32,15 @@ Usage:
#define REAL_LIBC ((void *) -1L) #define REAL_LIBC ((void *) -1L)
#endif #endif
#ifdef SYS_gettid
static inline int gettid(void)
{
return syscall(SYS_gettid);
}
#else
#error "SYS_gettid unavailable on this system"
#endif
/* Function pointers for real libc versions */ /* Function pointers for real libc versions */
static int dlog_fd = -1; static int dlog_fd = -1;
static int (*real_open)(const char *pathname, int flags, ...); static int (*real_open)(const char *pathname, int flags, ...);
@ -69,8 +79,9 @@ static void dlog(const char *fmt, ...)
dlog_fd = f ? real_open(f, O_CREAT|O_APPEND|O_WRONLY, 0600) : 2 /* stderr */; dlog_fd = f ? real_open(f, O_CREAT|O_APPEND|O_WRONLY, 0600) : 2 /* stderr */;
if (dlog_fd < 0) exit(1002); if (dlog_fd < 0) exit(1002);
} }
sprintf(buf, "[%5d]", gettid());
va_start(ap, fmt); va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap); vsnprintf(buf + 7, sizeof(buf) - 7, fmt, ap);
va_end(ap); va_end(ap);
REDIR(real_write, "write"); REDIR(real_write, "write");
len = strlen(b = buf); len = strlen(b = buf);