LineageOS/android_external_libvpx
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vpx_dec_fuzzer: Remove dependency on tools_common.c

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Instead of calling get_vpx_decoder_by_name(), derive
decoder interface directly.

This will avoid dependecy on tools_common and hence any potential
updates needed to build fuzzer, when tools_common uses functions
defined in a different file

With this dependency removed, fuzzer no longer needs to enable examples
when building vpx_dec_fuzzer binaries

Change-Id: I05753edf041b4bc742a6dc06e809a8a2929d379f
This commit is contained in:
Harish Mahendrakar
2019-02-01 12:25:03 -08:00
parent 936ada3304
commit 42f8012025
1 changed files with 9 additions and 10 deletions
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19
examples/vpx_dec_fuzzer.cc
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@@ -33,7 +33,8 @@
* Out of memory errors when running generated fuzzer binary
$../libvpx/configure --disable-unit-tests --size-limit=12288x12288 \
--extra-cflags="-DVPX_MAX_ALLOCABLE_MEMORY=1073741824" \
--disable-webm-io --enable-debug
--disable-webm-io --enable-debug --disable-vp8-encoder \
--disable-vp9-encoder --disable-examples
* Build libvpx
$make -j32
@@ -42,7 +43,7 @@
$ $CXX $CXXFLAGS -std=c++11 -DDECODER=vp9 \
-fsanitize=fuzzer -I../libvpx -I. -Wl,--start-group \
../libvpx/examples/vpx_dec_fuzzer.cc -o ./vpx_dec_fuzzer_vp9 \
./libvpx.a ./tools_common.c.o -Wl,--end-group
./libvpx.a -Wl,--end-group
* DECODER should be defined as vp9 or vp8 to enable vp9/vp8
*
@@ -66,13 +67,15 @@
#include <stdlib.h>
#include <memory>
#include "./tools_common.h"
#include "vpx/vp8dx.h"
#include "vpx/vpx_decoder.h"
#include "vpx_ports/mem_ops.h"
#define VPX_TOSTRING(str) #str
#define VPX_STRINGIFY(str) VPX_TOSTRING(str)
#define IVF_FRAME_HDR_SZ (4 + 8) /* 4 byte size + 8 byte timestamp */
#define IVF_FILE_HDR_SZ 32
#define VPXD_INTERFACE(name) VPXD_INTERFACE_(name)
#define VPXD_INTERFACE_(name) vpx_codec_##name##_dx()
static void CloseFile(FILE *file) { fclose(file); }
@@ -131,16 +134,12 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (fread(header, 1, IVF_FILE_HDR_SZ, file.get()) != IVF_FILE_HDR_SZ) {
return 0;
}
const VpxInterface *decoder = get_vpx_decoder_by_name(VPX_STRINGIFY(DECODER));
if (decoder == nullptr) {
return 0;
}
vpx_codec_ctx_t codec;
// Set thread count in the range [1, 64].
const unsigned int threads = (data[IVF_FILE_HDR_SZ] & 0x3f) + 1;
vpx_codec_dec_cfg_t cfg = { threads, 0, 0 };
if (vpx_codec_dec_init(&codec, decoder->codec_interface(), &cfg, 0)) {
if (vpx_codec_dec_init(&codec, VPXD_INTERFACE(DECODER), &cfg, 0)) {
return 0;
}