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aubdump: Don't use .so constructors for initializing

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This doesn't seem to work when mixed with constructors in other shared
objects or other creative uses of the linker. Let's stick with a simpler
mechanism, where we look up the libc functions when our hooks are called
for the first time.
This commit is contained in:
Kristian Høgsberg Kristensen 2016-02-13 12:34:22 -08:00
parent a3506b5219
commit 68a064ec64
1 changed files with 27 additions and 3 deletions
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30
tools/aubdump.c
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@ -43,8 +43,11 @@
#include "intel_aub.h"
#include "intel_chipset.h"
static int (*libc_close)(int fd);
static int (*libc_ioctl)(int fd, unsigned long request, void *argp);
static int close_init_helper(int fd);
static int ioctl_init_helper(int fd, unsigned long request, ...);
static int (*libc_close)(int fd) = close_init_helper;
static int (*libc_ioctl)(int fd, unsigned long request, ...) = ioctl_init_helper;
static int drm_fd = -1;
static char *filename;
@ -528,7 +531,7 @@ ioctl(int fd, unsigned long request, ...)
}
}
static void __attribute__ ((constructor))
static void
init(void)
{
const char *args = getenv("INTEL_AUBDUMP_ARGS");
@ -553,6 +556,27 @@ init(void)
fail_if(file == NULL, "intel_aubdump: failed to open file '%s'\n", filename);
}
static int
close_init_helper(int fd)
{
init();
return libc_close(fd);
}
static int
ioctl_init_helper(int fd, unsigned long request, ...)
{
va_list args;
void *argp;
va_start(args, request);
argp = va_arg(args, void *);
va_end(args);
init();
return libc_ioctl(fd, request, argp);
}
static void __attribute__ ((destructor))
fini(void)
{