mirror of
https://github.com/davea42/libdwarf-code.git
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550d3570b2
of the temp file to start with junk
to better match what is routine in the regressiontests.
And to something that works just fine with Win msys2.
(in msys2 "/tmp/anything" will not work for open( "wb")
whereas "anything" will work.)
modified: fuzz/fuzz_aranges.c
modified: fuzz/fuzz_crc.c
modified: fuzz/fuzz_crc_32.c
modified: fuzz/fuzz_debug_addr_access.c
modified: fuzz/fuzz_debug_str.c
modified: fuzz/fuzz_debuglink.c
modified: fuzz/fuzz_die_cu.c
modified: fuzz/fuzz_die_cu_attrs.c
modified: fuzz/fuzz_die_cu_attrs_loclist.c
modified: fuzz/fuzz_die_cu_e.c
modified: fuzz/fuzz_die_cu_e_print.c
modified: fuzz/fuzz_die_cu_info1.c
modified: fuzz/fuzz_die_cu_offset.c
modified: fuzz/fuzz_die_cu_print.c
modified: fuzz/fuzz_dnames.c
modified: fuzz/fuzz_findfuncbypc.c
modified: fuzz/fuzz_gdbindex.c
modified: fuzz/fuzz_globals.c
modified: fuzz/fuzz_gnu_index.c
modified: fuzz/fuzz_init_b.c
modified: fuzz/fuzz_init_binary.c
modified: fuzz/fuzz_init_path.c
modified: fuzz/fuzz_macro_dwarf4.c
modified: fuzz/fuzz_macro_dwarf5.c
modified: fuzz/fuzz_rng.c
modified: fuzz/fuzz_set_frame_all.c
modified: fuzz/fuzz_showsectgrp.c
modified: fuzz/fuzz_simplereader_tu.c
modified: fuzz/fuzz_srcfiles.c
modified: fuzz/fuzz_stack_frame_access.c
modified: fuzz/fuzz_str_offsets.c
modified: fuzz/fuzz_tie.c
modified: fuzz/fuzz_xuindex.c
modified: src/lib/libdwarf/libdwarf.h
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/* Copyright 2021 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <fcntl.h> /* open() O_RDONLY O_BINARY */
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#ifndef O_BINARY
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#define O_BINARY 0 /* So it does nothing in Linux/Unix */
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#endif
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/*
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* Libdwarf library callers can only use these headers.
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*/
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#include "dwarf.h"
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#include "libdwarf.h"
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/*
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* Fuzzer function
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*/
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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char filename[256];
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#ifdef DWREGRESSIONTEMP
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/* Under msys2, the /tmp/ results in an open fail */
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sprintf(filename, "libfuzzer.%d", getpid());
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#else
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sprintf(filename, "/tmp/libfuzzer.%d", getpid());
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#endif
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FILE *fp = fopen(filename, "wb");
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if (!fp) {
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printf("FAIL libfuzzer cannot open temp as writeable %s\n",
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filename);
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return 0;
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}
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fwrite(data, size, 1, fp);
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fclose(fp);
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Dwarf_Debug dbg = 0;
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int res = DW_DLV_ERROR;
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Dwarf_Error error = 0;
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Dwarf_Handler errhand = 0;
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Dwarf_Ptr errarg = 0;
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int fd = open(filename, O_RDONLY | O_BINARY);
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if (fd < 0) {
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exit(EXIT_FAILURE);
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}
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res = dwarf_init_b(fd, DW_GROUPNUMBER_ANY, errhand, errarg, &dbg, &error);
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if (res != DW_DLV_OK) {
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dwarf_dealloc_error(dbg, error);
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} else {
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/* libdwarf does not require offset to be anything in
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particular, and will work fine regardless
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(possibly returning DW_DLV_ERROR or DW_DLV_OK). But
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valgrind generates a warning passing in the uninitialized
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value so let us initialize it to ... something. */
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Dwarf_Off dw_offset = 11;
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char *dw_string;
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Dwarf_Signed dw_strlen_of_string;
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while ((res = dwarf_get_str(dbg, dw_offset, &dw_string,
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&dw_strlen_of_string, &error)) == DW_DLV_OK) {
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dw_offset += dw_strlen_of_string + 1;
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}
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}
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dwarf_finish(dbg);
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close(fd);
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unlink(filename);
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return 0;
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}
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