[gn] Switch basic linux32 bots to gn

BUG=chromium:474921

Review-Url: https://codereview.chromium.org/2109293004
Cr-Commit-Position: refs/heads/master@{#37492}

BUILD.gn

@@ -31,6 +31,9 @@ declare_args() {
   # Embeds the given script into the snapshot.
   v8_embed_script = ""
 
+  # Support for backtrace_symbols on linux.
+  v8_enable_backtrace = false
+
   # Sets -dENABLE_DISASSEMBLER.
   v8_enable_disassembler = false
 
@@ -292,6 +295,10 @@ config("toolchain") {
   # TODO(jochen): Add support for compiling with simulators.
 
   if (is_debug) {
+    if (is_linux && v8_enable_backtrace) {
+      ldflags += [ "-rdynamic" ]
+    }
+
     # TODO(jochen): Add support for different debug optimization levels.
     defines += [
       "ENABLE_DISASSEMBLER",

gni/isolate.gni

@@ -106,6 +106,12 @@ template("v8_isolate_run") {
       } else {
         has_valgrind = "0"
       }
+      if (v8_gcmole) {
+        gcmole = "1"
+      } else {
+        gcmole = "0"
+      }
+
 
       # Note, all paths will be rebased in isolate_driver.py to be relative to
       # the isolate file.
@@ -135,7 +141,7 @@ template("v8_isolate_run") {
         "--config-variable",
         "cfi_vptr=$cfi_vptr",
         "--config-variable",
-        "gcmole=0",
+        "gcmole=$gcmole",
         "--config-variable",
         "has_valgrind=$has_valgrind",
         "--config-variable",

gni/v8.gni

@@ -10,6 +10,9 @@ declare_args() {
   # swarming.
   v8_has_valgrind = false
 
+  # Indicate if gcmole was fetched as a hook to make it available on swarming.
+  v8_gcmole = false
+
   # Turns on compiler optimizations in V8 in Debug build.
   v8_optimized_debug = true
 

infra/mb/mb_config.pyl

@@ -18,8 +18,8 @@
     },
     'client.v8': {
       # Linux.
-      'V8 Linux - builder': 'gyp_release_x86_gcmole',
-      'V8 Linux - debug builder': 'gyp_debug_x86',
+      'V8 Linux - builder': 'gn_release_x86_gcmole',
+      'V8 Linux - debug builder': 'gn_debug_x86',
       'V8 Linux - nosnap builder': 'gyp_release_x86_no_snap',
       'V8 Linux - nosnap debug builder': 'gyp_debug_x86_no_snap',
       'V8 Linux - shared': 'gyp_release_x86_shared_verify_heap',
@@ -129,10 +129,10 @@
       'V8 s390x - sim - stable branch': 'gyp_release_simulate_s390x',
     },
     'tryserver.v8': {
-      'v8_linux_rel_ng': 'gyp_release_x86_gcmole_trybot',
-      'v8_linux_avx2_dbg': 'gyp_debug_x86_trybot',
-      'v8_linux_nodcheck_rel_ng': 'gyp_release_x86_minimal_symbols',
-      'v8_linux_dbg_ng': 'gyp_debug_x86_trybot',
+      'v8_linux_rel_ng': 'gn_release_x86_gcmole_trybot',
+      'v8_linux_avx2_dbg': 'gn_debug_x86_trybot',
+      'v8_linux_nodcheck_rel_ng': 'gn_release_x86_minimal_symbols',
+      'v8_linux_dbg_ng': 'gn_debug_x86_trybot',
       'v8_linux_noi18n_rel_ng': 'gyp_release_x86_no_i18n_trybot',
       'v8_linux_gc_stress_dbg': 'gyp_debug_x86_trybot',
       'v8_linux_nosnap_rel': 'gyp_release_x86_no_snap_trybot',
@@ -193,6 +193,20 @@
     'gn_debug_x64_valgrind': [
       'gn', 'debug_bot', 'x64', 'swarming', 'valgrind'],
 
+    # GN debug configs for x86.
+    'gn_debug_x86': [
+      'gn', 'debug_bot', 'x86', 'swarming'],
+    'gn_debug_x86_trybot': [
+      'gn', 'debug_trybot', 'x86', 'swarming'],
+
+    # GN release configs for x86.
+    'gn_release_x86_gcmole': [
+      'gn', 'release_bot', 'x86', 'gcmole', 'swarming'],
+    'gn_release_x86_gcmole_trybot': [
+      'gn', 'release_trybot', 'x86', 'gcmole', 'swarming'],
+    'gn_release_x86_minimal_symbols': [
+      'gn', 'release_bot', 'x86', 'minimal_symbols', 'swarming'],
+
     # Gyp debug configs for arm.
     'gyp_debug_arm': [
       'gyp', 'debug_bot', 'arm', 'crosscompile', 'hard_float', 'swarming'],
@@ -320,10 +334,6 @@
       'gyp', 'release_bot', 'x86', 'gcc', 'minimal_symbols'],
     'gyp_release_x86_interpreted_regexp': [
       'gyp', 'release_bot', 'x86', 'v8_interpreted_regexp'],
-    'gyp_release_x86_gcmole': [
-      'gyp', 'release_bot', 'x86', 'gcmole', 'swarming'],
-    'gyp_release_x86_gcmole_trybot': [
-      'gyp', 'release_trybot', 'x86', 'gcmole', 'swarming'],
     'gyp_release_x86_minimal_symbols': [
       'gyp', 'release_bot', 'x86', 'minimal_symbols', 'swarming'],
     'gyp_release_x86_no_i18n_trybot': [
@@ -418,8 +428,7 @@
     },
 
     'gcmole': {
-      # TODO(machenbach): Add this to gn.
-      'gn_args': 'gcmole=true',
+      'gn_args': 'v8_gcmole=true',
       'gyp_defines': 'gcmole=1',
     },