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Improve standalone fuzzer driver error messages

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This commit is contained in:
Jon Siwek 2020-04-30 13:43:57 -07:00
parent d533212a6a
commit 787ebd369e
1 changed files with 15 additions and 3 deletions
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18
src/fuzzers/standalone-driver.cc
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@ -1,6 +1,7 @@
#include <cstdio> #include <cstdio>
#include <cstdint> #include <cstdint>
#include <cassert> #include <cstdlib>
#include <cstring>
#include <memory> #include <memory>
#include <chrono> #include <chrono>
@ -26,7 +27,12 @@ int main(int argc, char** argv)
fflush(stdout); fflush(stdout);
auto f = fopen(input_file_name, "r"); auto f = fopen(input_file_name, "r");
assert(f);
if ( ! f )
{
printf(" failed to open file: %s\n", strerror(errno));
abort();
}
fseek(f, 0, SEEK_END); fseek(f, 0, SEEK_END);
auto input_length = ftell(f); auto input_length = ftell(f);
@ -34,7 +40,13 @@ int main(int argc, char** argv)
auto input_buffer = std::make_unique<uint8_t[]>(input_length); auto input_buffer = std::make_unique<uint8_t[]>(input_length);
auto bytes_read = fread(input_buffer.get(), 1, input_length, f); auto bytes_read = fread(input_buffer.get(), 1, input_length, f);
assert(bytes_read == static_cast<size_t>(input_length));
if ( bytes_read != static_cast<size_t>(input_length) )
{
printf(" failed to read full file: %zu/%ld\n",
bytes_read, input_length);
abort();
}
auto start = high_resolution_clock::now(); auto start = high_resolution_clock::now();
LLVMFuzzerTestOneInput(input_buffer.get(), input_length); LLVMFuzzerTestOneInput(input_buffer.get(), input_length);