gallium/android: Rewrite backtrace helper for android

[mesa.git] / src / util / u_process.c

diff --git a/src/util/u_process.c b/src/util/u_process.c
index 5e5927678d831c10af2216798cb5a0223b931538..68fda93a53bb22515fb5c04f64d85534d8640df7 100644 (file)
--- a/src/util/u_process.c
+++ b/src/util/u_process.c
@@ -26,23 +26,61 @@
  */
 
 #include "u_process.h"
+#include "detect_os.h"
+#include "macros.h"
 #include <string.h>
 #include <errno.h>
 #include <stdlib.h>
 
 #undef GET_PROGRAM_NAME
 
-#if (defined(__GNU_LIBRARY__) || defined(__GLIBC__)) && !defined(__UCLIBC__)
-#    if !defined(__GLIBC__) || (__GLIBC__ < 2)
-/* These aren't declared in any libc5 header */
-extern char *program_invocation_name, *program_invocation_short_name;
-#    endif
+#if DETECT_OS_WINDOWS
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
+
+#if DETECT_OS_APPLE
+#include <mach-o/dyld.h>
+#endif
+
+#if defined(__linux__) && defined(HAVE_PROGRAM_INVOCATION_NAME)
+
+static char *path = NULL;
+
+static void __freeProgramPath()
+{
+   free(path);
+   path = NULL;
+}
+
 static const char *
 __getProgramName()
 {
    char * arg = strrchr(program_invocation_name, '/');
-   if (arg)
+   if (arg) {
+      /* If the / character was found this is likely a linux path or
+       * an invocation path for a 64-bit wine program.
+       *
+       * However, some programs pass command line arguments into argv[0].
+       * Strip these arguments out by using the realpath only if it was
+       * a prefix of the invocation name.
+       */
+      if (!path) {
+         path = realpath("/proc/self/exe", NULL);
+         atexit(__freeProgramPath);
+      }
+
+      if (path && strncmp(path, program_invocation_name, strlen(path)) == 0) {
+         /* This shouldn't be null because path is a a prefix,
+          * but check it anyway since path is static. */
+         char * name = strrchr(path, '/');
+         if (name)
+            return name + 1;
+      }
+
       return arg+1;
+   }
 
    /* If there was no '/' at all we likely have a windows like path from
     * a wine application.
@@ -54,15 +92,18 @@ __getProgramName()
    return program_invocation_name;
 }
 #    define GET_PROGRAM_NAME() __getProgramName()
-#elif defined(__CYGWIN__)
+#elif defined(HAVE_PROGRAM_INVOCATION_NAME)
 #    define GET_PROGRAM_NAME() program_invocation_short_name
 #elif defined(__FreeBSD__) && (__FreeBSD__ >= 2)
 #    include <osreldate.h>
 #    if (__FreeBSD_version >= 440000)
 #        define GET_PROGRAM_NAME() getprogname()
 #    endif
-#elif defined(__NetBSD__) && defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 106000100)
-#    define GET_PROGRAM_NAME() getprogname()
+#elif defined(__NetBSD__)
+#    include <sys/param.h>
+#    if defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 106000100)
+#        define GET_PROGRAM_NAME() getprogname()
+#    endif
 #elif defined(__DragonFly__)
 #    define GET_PROGRAM_NAME() getprogname()
 #elif defined(__APPLE__)
@@ -97,7 +138,7 @@ __getProgramName()
 #endif
 
 #if !defined(GET_PROGRAM_NAME)
-#    if defined(__OpenBSD__) || defined(NetBSD) || defined(__UCLIBC__) || defined(ANDROID)
+#    if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__UCLIBC__) || defined(ANDROID)
 /* This is a hack. It's said to work on OpenBSD, NetBSD and GNU.
  * Rogelio M.Serrano Jr. reported it's also working with UCLIBC. It's
  * used as a last resort, if there is no documented facility available. */
@@ -123,3 +164,35 @@ util_get_process_name(void)
 {
    return GET_PROGRAM_NAME();
 }
+
+size_t
+util_get_process_exec_path(char* process_path, size_t len)
+{
+#if DETECT_OS_WINDOWS
+   return GetModuleFileNameA(NULL, process_path, len);
+#elif DETECT_OS_APPLE
+   uint32_t bufSize = len;
+   int result = _NSGetExecutablePath(process_path, &bufSize);
+
+   return (result == 0) ? strlen(process_path) : 0;
+#elif DETECT_OS_UNIX
+   ssize_t r;
+
+   if ((r = readlink("/proc/self/exe", process_path, len)) > 0)
+      goto success;
+   if ((r = readlink("/proc/curproc/exe", process_path, len)) > 0)
+      goto success;
+   if ((r = readlink("/proc/curproc/file", process_path, len)) > 0)
+      goto success;
+
+    return 0;
+success:
+   if (r == len)
+      return 0;
+
+    process_path[r] = '\0';
+    return r;
+
+#endif
+   return 0;
+}