xnu-1699.22.73.tar.gz

[apple/xnu.git] / tools / tests / execperf / printexecinfo.c

diff --git a/tools/tests/execperf/printexecinfo.c b/tools/tests/execperf/printexecinfo.c
new file mode 100644 (file)
index 0000000..1acf0d4
--- /dev/null
+++ b/tools/tests/execperf/printexecinfo.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <err.h>
+#include <crt_externs.h>
+#include <string.h>
+#include <mach/mach.h>
+#include <mach-o/ldsyms.h>
+#include <mach-o/dyld_images.h>
+#include <stdlib.h>
+
+__attribute__((constructor))
+void init(int argc, const char *argv[], const char *envp[], const char *appl[], void *vars __attribute__((unused))) {
+       int i;
+
+       printf("argv = %p\n", argv);
+       for (i=0; argv[i]; i++) {
+               printf("argv[%2d] = %p %.100s%s\n", i, argv[i], argv[i], strlen(argv[i]) > 100 ? "..." : "");
+       }
+       printf("envp = %p\n", envp);
+       for (i=0; envp[i]; i++) {
+               printf("envp[%2d] = %p %.100s%s\n", i, envp[i], envp[i], strlen(envp[i]) > 100 ? "..." : "");
+       }
+       printf("appl = %p\n", appl);
+       for (i=0; appl[i]; i++) {
+               printf("appl[%2d] = %p %.100s%s\n", i, appl[i], appl[i], strlen(appl[i]) > 100 ? "..." : "");
+       }
+}
+
+void printexecinfo(void)
+{
+       int ret;
+       uint64_t stackaddr;
+       size_t len = sizeof(stackaddr);
+
+       printf("executable load address = 0x%016llx\n", (uint64_t)(uintptr_t)&_mh_execute_header);
+
+       ret = sysctlbyname("kern.usrstack64", &stackaddr, &len, NULL, 0);
+       if (ret == -1)
+               err(1, "sysctlbyname");
+
+       printf("          stack address = 0x%016llx\n", stackaddr);
+}
+
+void printdyldinfo(void)
+{
+       task_dyld_info_data_t info;
+       mach_msg_type_number_t size = TASK_DYLD_INFO_COUNT;
+       kern_return_t kret;
+       struct dyld_all_image_infos *all_image_infos;
+       
+       kret = task_info(mach_task_self(), TASK_DYLD_INFO,
+                                        (void *)&info, &size);
+       if (kret != KERN_SUCCESS)
+               errx(1, "task_info: %s", mach_error_string(kret));
+
+       all_image_infos = (struct dyld_all_image_infos *)(uintptr_t)info.all_image_info_addr;
+
+       printf("      dyld load address = 0x%016llx\n", (uint64_t)(uintptr_t)all_image_infos->dyldImageLoadAddress);
+       printf("     shared cache slide = 0x%016llx\n", (uint64_t)(uintptr_t)all_image_infos->sharedCacheSlide);
+
+}
+
+int main(int argc, char *argv[]) {
+
+       printexecinfo();
+       printdyldinfo();
+
+       return 0;
+}