[numfuzz] Add an interrupt-budget fuzzer

This fuzzes more values of interrupt-budget on numfuzz. For now
as a single instance. In a follow up we add it also to combined
flags.

No-Try: true
Bug: v8:12434
Change-Id: I836c5e829ffeabfa4a4686d4d3d2fd43fce1ee88
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3302797Reviewed-by: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78107}

infra/testing/builders.pyl

@@ -2036,6 +2036,11 @@
         'suffix': 'deopt',
         'test_args': ['--total-timeout-sec=2100', '--stress-deopt=1']
       },
+      {
+        'name': 'numfuzz',
+        'suffix': 'interrupt',
+        'test_args': ['--total-timeout-sec=2100', '--stress-interrupt-budget=1']
+      },
     ],
   },
   'V8 NumFuzz - TSAN': {
@@ -2059,6 +2064,11 @@
         'suffix': 'delay',
         'test_args': ['--total-timeout-sec=2100', '--stress-delay-tasks=1']
       },
+      {
+        'name': 'numfuzz',
+        'suffix': 'interrupt',
+        'test_args': ['--total-timeout-sec=2100', '--stress-interrupt-budget=1']
+      },
       {
         'name': 'numfuzz',
         'suffix': 'threads',
@@ -2114,6 +2124,11 @@
         'suffix': 'delay',
         'test_args': ['--total-timeout-sec=2100', '--stress-delay-tasks=1']
       },
+      {
+        'name': 'numfuzz',
+        'suffix': 'interrupt',
+        'test_args': ['--total-timeout-sec=2100', '--stress-interrupt-budget=1']
+      },
       {
         'name': 'numfuzz',
         'suffix': 'threads',
@@ -2163,6 +2178,11 @@
         'suffix': 'deopt',
         'test_args': ['--total-timeout-sec=900', '--stress-deopt=1']
       },
+      {
+        'name': 'numfuzz',
+        'suffix': 'interrupt',
+        'test_args': ['--total-timeout-sec=900', '--stress-interrupt-budget=1']
+      },
     ],
   },
   'v8_numfuzz_tsan_ng_triggered': {
@@ -2180,6 +2200,11 @@
         'suffix': 'delay',
         'test_args': ['--total-timeout-sec=900', '--stress-delay-tasks=1']
       },
+      {
+        'name': 'numfuzz',
+        'suffix': 'interrupt',
+        'test_args': ['--total-timeout-sec=900', '--stress-interrupt-budget=1']
+      },
       {
         'name': 'numfuzz',
         'suffix': 'threads',
@@ -2227,6 +2252,11 @@
         'suffix': 'delay',
         'test_args': ['--total-timeout-sec=900', '--stress-delay-tasks=1']
       },
+      {
+        'name': 'numfuzz',
+        'suffix': 'interrupt',
+        'test_args': ['--total-timeout-sec=900', '--stress-interrupt-budget=1']
+      },
       {
         'name': 'numfuzz',
         'suffix': 'threads',

tools/testrunner/num_fuzzer.py

@@ -76,13 +76,16 @@ class NumFuzzer(base_runner.BaseTestRunner):
                       help="probability [0-10] of adding --thread-pool-size "
                            "flag to the test")
 
-    # Stress deopt
+    # Stress compiler
     parser.add_option("--stress-deopt", default=0, type="int",
                       help="probability [0-10] of adding --deopt-every-n-times "
                            "flag to the test")
     parser.add_option("--stress-deopt-min", default=1, type="int",
                       help="extends --stress-deopt to have minimum interval "
                            "between deopt points")
+    parser.add_option("--stress-interrupt-budget", default=0, type="int",
+                      help="probability [0-10] of adding the --interrupt-budget "
+                           "flag to the test")
 
     # Combine multiple tests
     parser.add_option("--combine-tests", default=False, action="store_true",

tools/testrunner/testproc/fuzzer.py

@@ -267,11 +267,22 @@ class CompactionFuzzer(Fuzzer):
     while True:
       yield ['--stress-compaction-random']
 
+
+class InterruptBudgetFuzzer(Fuzzer):
+  def create_flags_generator(self, rng, test, analysis_value):
+    while True:
+      # Higher likelyhood for --no-lazy-feedback-allocation since some
+      # code paths for --interrupt-budget are tied to it.
+      flags = rng.choice([], [], ['--no-lazy-feedback-allocation'])
+      yield flags + ['--interrupt-budget=%d' % rng.randint(0, 135168)]
+
+
 class StackSizeFuzzer(Fuzzer):
   def create_flags_generator(self, rng, test, analysis_value):
     while True:
       yield ['--stack-size=%d' % rng.randint(54, 983)]
 
+
 class TaskDelayFuzzer(Fuzzer):
   def create_flags_generator(self, rng, test, analysis_value):
     while True:
@@ -326,6 +337,7 @@ FUZZERS = {
   'delay': (None, TaskDelayFuzzer),
   'deopt': (DeoptAnalyzer, DeoptFuzzer),
   'gc_interval': (GcIntervalAnalyzer, GcIntervalFuzzer),
+  'interrupt': InterruptBudgetFuzzer,
   'marking': (MarkingAnalyzer, MarkingFuzzer),
   'scavenge': (ScavengeAnalyzer, ScavengeFuzzer),
   'stack': (None, StackSizeFuzzer),