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Unify fuzzer random number generation into a single class

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BUG=tint:1098

Change-Id: I84931804515487d931bbbb5f0d5239d03ca76dfc
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/63300
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Alastair Donaldson <afdx@google.com>
This commit is contained in:
Ryan Harrison
2021-09-03 00:59:35 +00:00
committed by Tint LUCI CQ
parent 6a1eb45961
commit 5dc0ea7cce
26 changed files with 265 additions and 309 deletions
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57
fuzzers/tint_regex_fuzzer/wgsl_mutator.cc
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@@ -17,13 +17,12 @@
#include <cassert>
#include <cstring>
#include <map>
#include <random>
#include <regex>
#include <string>
#include <utility>
#include <vector>
#include "fuzzers/tint_regex_fuzzer/util.h"
#include "fuzzers/random_generator.h"
namespace tint {
namespace fuzzers {
@@ -137,7 +136,7 @@ void ReplaceInterval(size_t start_index,
bool SwapRandomIntervals(const std::string& delimiter,
std::string& wgsl_code,
std::mt19937& generator) {
RandomGenerator& generator) {
std::vector<size_t> delimiter_positions =
FindDelimiterIndices(delimiter, wgsl_code);
@@ -148,14 +147,10 @@ bool SwapRandomIntervals(const std::string& delimiter,
// When generating the i-th random number, we should make sure that there are
// at least (3-i) numbers greater than this number.
size_t ind1 =
GetRandomIntFromRange(0, delimiter_positions.size() - 3U, generator);
size_t ind2 = GetRandomIntFromRange(
ind1 + 1U, delimiter_positions.size() - 2U, generator);
size_t ind3 =
GetRandomIntFromRange(ind2, delimiter_positions.size() - 2U, generator);
size_t ind4 = GetRandomIntFromRange(
ind3 + 1U, delimiter_positions.size() - 1U, generator);
size_t ind1 = generator.GetUInt64(delimiter_positions.size() - 3u);
size_t ind2 = generator.GetUInt64(ind1 + 1u, delimiter_positions.size() - 2u);
size_t ind3 = generator.GetUInt64(ind2, delimiter_positions.size() - 2u);
size_t ind4 = generator.GetUInt64(ind3 + 1u, delimiter_positions.size() - 1u);
SwapIntervals(delimiter_positions[ind1],
delimiter_positions[ind2] - delimiter_positions[ind1],
@@ -168,7 +163,7 @@ bool SwapRandomIntervals(const std::string& delimiter,
bool DeleteRandomInterval(const std::string& delimiter,
std::string& wgsl_code,
std::mt19937& generator) {
RandomGenerator& generator) {
std::vector<size_t> delimiter_positions =
FindDelimiterIndices(delimiter, wgsl_code);
@@ -177,10 +172,8 @@ bool DeleteRandomInterval(const std::string& delimiter,
return false;
}
size_t ind1 =
GetRandomIntFromRange(0, delimiter_positions.size() - 2U, generator);
size_t ind2 = GetRandomIntFromRange(
ind1 + 1U, delimiter_positions.size() - 1U, generator);
size_t ind1 = generator.GetUInt64(delimiter_positions.size() - 2u);
size_t ind2 = generator.GetUInt64(ind1 + 1u, delimiter_positions.size() - 1u);
DeleteInterval(delimiter_positions[ind1],
delimiter_positions[ind2] - delimiter_positions[ind1],
@@ -191,7 +184,7 @@ bool DeleteRandomInterval(const std::string& delimiter,
bool DuplicateRandomInterval(const std::string& delimiter,
std::string& wgsl_code,
std::mt19937& generator) {
RandomGenerator& generator) {
std::vector<size_t> delimiter_positions =
FindDelimiterIndices(delimiter, wgsl_code);
@@ -200,13 +193,9 @@ bool DuplicateRandomInterval(const std::string& delimiter,
return false;
}
size_t ind1 =
GetRandomIntFromRange(0, delimiter_positions.size() - 2U, generator);
size_t ind2 = GetRandomIntFromRange(
ind1 + 1U, delimiter_positions.size() - 1U, generator);
size_t ind3 =
GetRandomIntFromRange(0, delimiter_positions.size() - 1U, generator);
size_t ind1 = generator.GetUInt64(delimiter_positions.size() - 2u);
size_t ind2 = generator.GetUInt64(ind1 + 1u, delimiter_positions.size() - 1u);
size_t ind3 = generator.GetUInt64(delimiter_positions.size() - 1u);
DuplicateInterval(delimiter_positions[ind1],
delimiter_positions[ind2] - delimiter_positions[ind1],
@@ -215,7 +204,8 @@ bool DuplicateRandomInterval(const std::string& delimiter,
return true;
}
bool ReplaceRandomIdentifier(std::string& wgsl_code, std::mt19937& generator) {
bool ReplaceRandomIdentifier(std::string& wgsl_code,
RandomGenerator& generator) {
std::vector<std::pair<size_t, size_t>> identifiers =
GetIdentifiers(wgsl_code);
@@ -224,15 +214,12 @@ bool ReplaceRandomIdentifier(std::string& wgsl_code, std::mt19937& generator) {
return false;
}
size_t id1_index =
GetRandomIntFromRange(0, identifiers.size() - 1U, generator);
size_t id2_index =
GetRandomIntFromRange(0, identifiers.size() - 1U, generator);
size_t id1_index = generator.GetUInt64(identifiers.size() - 1u);
size_t id2_index = generator.GetUInt64(identifiers.size() - 1u);
// The two identifiers must be different
while (id1_index == id2_index) {
id2_index = GetRandomIntFromRange(0, identifiers.size() - 1U, generator);
id2_index = generator.GetUInt64(identifiers.size() - 1u);
}
ReplaceRegion(identifiers[id1_index].first, identifiers[id1_index].second,
@@ -242,7 +229,8 @@ bool ReplaceRandomIdentifier(std::string& wgsl_code, std::mt19937& generator) {
return true;
}
bool ReplaceRandomIntLiteral(std::string& wgsl_code, std::mt19937& generator) {
bool ReplaceRandomIntLiteral(std::string& wgsl_code,
RandomGenerator& generator) {
std::vector<std::pair<size_t, size_t>> literals = GetIntLiterals(wgsl_code);
// Need at least one integer literal
@@ -250,14 +238,13 @@ bool ReplaceRandomIntLiteral(std::string& wgsl_code, std::mt19937& generator) {
return false;
}
size_t id1_index = GetRandomIntFromRange(0, literals.size() - 1U, generator);
size_t id1_index = generator.GetUInt64(literals.size() - 1u);
// INT_MAX = 2147483647, INT_MIN = -2147483648
std::vector<std::string> boundary_values = {
"2147483647", "-2147483648", "1", "-1", "0", "4294967295"};
size_t boundary_index =
GetRandomIntFromRange(0, boundary_values.size() - 1U, generator);
size_t boundary_index = generator.GetUInt64(boundary_values.size() - 1u);
ReplaceInterval(literals[id1_index].first, literals[id1_index].second,
boundary_values[boundary_index], wgsl_code);