diff options
Diffstat (limited to 'src/third_party/unwind/dist/tests/Ltest-mem-validate.c')
-rw-r--r-- | src/third_party/unwind/dist/tests/Ltest-mem-validate.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/tests/Ltest-mem-validate.c b/src/third_party/unwind/dist/tests/Ltest-mem-validate.c new file mode 100644 index 00000000000..e5127b90628 --- /dev/null +++ b/src/third_party/unwind/dist/tests/Ltest-mem-validate.c @@ -0,0 +1,145 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003-2004 Hewlett-Packard Co + Contributed by David Mosberger-Tang <davidm@hpl.hp.com> + +This file is part of libunwind. + +Copyright (c) 2003 Hewlett-Packard Co. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +#include "compiler.h" + +#include <libunwind.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <sys/resource.h> +#include <sys/mman.h> +#include <sys/types.h> +#include <sys/wait.h> + +#define panic(args...) \ + { fprintf (stderr, args); exit (-1); } + +void * stack_start; + +#define PAGE_SIZE 4096 + +void do_backtrace (void) +{ + void* buffer[1024]; + int size = 1024; + mprotect((void*)((uintptr_t)stack_start & ~(PAGE_SIZE - 1)), + PAGE_SIZE, PROT_NONE); + + unw_cursor_t cursor; + unw_word_t ip, sp; + unw_context_t uc; + int ret; + int steps = 0; + + unw_getcontext (&uc); + if (unw_init_local (&cursor, &uc) < 0) + panic ("unw_init_local failed!\n"); + + do + { + unw_get_reg (&cursor, UNW_REG_IP, &ip); + unw_get_reg (&cursor, UNW_REG_SP, &sp); + + ret = unw_step (&cursor); + if (ret < 0) + { + unw_get_reg (&cursor, UNW_REG_IP, &ip); + } + steps ++; + } + while (ret > 0); + + if (steps < 5) + { + exit(-1); + } + + mprotect((void*)((uintptr_t)stack_start & ~(PAGE_SIZE - 1)), + PAGE_SIZE, PROT_READ|PROT_WRITE); +} + +void consume_and_run (int depth) +{ + unw_cursor_t cursor; + unw_context_t uc; + char string[1024]; + + sprintf (string, "hello %p %p\n", &cursor, &uc); + if (depth == 0) { + do_backtrace(); + } else { + consume_and_run(depth - 1); + } +} + +int +main (int argc, char **argv UNUSED) +{ + int start; + unw_context_t uc; + unw_cursor_t cursor; + + stack_start = &start; + + // Initialize pipe mem validate check, opens file descriptors + unw_getcontext(&uc); + if (unw_init_local (&cursor, &uc) < 0) + panic ("unw_init_local failed!\n"); + + int i; + for (i = 3; i < 10; i++) + { + + pid_t childpid = fork(); + if (!childpid) + { + /* Close fds and make sure we still work */ + int ret = close(i); + } + + int status; + if (childpid) + { + wait(&status); + if (WIFEXITED(status)) + return WEXITSTATUS(status); + else + return -1; + } + else + { + consume_and_run (10); + + return 0; + } + } + + return 0; +} |