print stack trace on crash, tweak formatting, _Exit hard

Mac example:

1 srcs * 1 sinks + 0 tests == 1 tasks
0ns elapsed, 1 active, 0 queued, 11MB RAM, 11MB peak
	f16 gm  dstreadshuffle
../../src/core/SkXfermode.cpp:935: fatal error: ""r.fVec[i] >= min && r.fVec[i] <= max""

Caught signal 6 [Abort trap: 6], was running:
	f16 gm  dstreadshuffle

Stack trace:
    0   dm                                  0x000000010f23fc9d _ZZL19setup_crash_handlervENK3$_5clEi + 397
    1   dm                                  0x000000010f23fb06 _ZZL19setup_crash_handlervEN3$_58__invokeEi + 22
    2   libsystem_platform.dylib            0x00007fff9d44e52a _sigtramp + 26
    3   ???                                 0x00007fff9900b902 0x0 + 140735760349442
    4   libsystem_c.dylib                   0x00007fff96a836e7 abort + 129
    5   dm                                  0x000000010fcb67c9 _Z17sk_abort_no_printv + 9
    6   dm                                  0x000000010f90fc1f _ZL11assert_unitRK6SkPM4f + 175
    7   dm                                  0x000000010f90e957 _Z7proc_4fIXadL_ZL10lighten_4fRK4SkNxILi4EfES3_EEE6SkPM4fRKS4_S6_ + 103
    8   dm                                  0x000000010f918946 _Z10xfer_u64_nIL7DstType1EEvPK10SkXfermodePyPK6SkPM4fiPKh + 182
    9   dm                                  0x000000010f7a5f3e _ZN22SkState_Shader_BlitterI7State64E9blitAntiHEiiPKhPKs + 398
    10  dm                                  0x000000010f3c730c _ZN9SkBlitter10blitAntiH2Eiijj + 108
    11  dm                                  0x000000010f8d76f4 _ZN25Vertish_SkAntiHairBlitter7drawCapEiiii + 164
    12  dm                                  0x000000010f8d4d92 _ZL16do_anti_hairlineiiiiPK7SkIRectP9SkBlitter + 3058
    13  dm                                  0x000000010f8d40f4 _ZN6SkScan15AntiHairLineRgnEPK7SkPointiPK8SkRegionP9SkBlitter + 900
    14  dm                                  0x000000010f8d8fff _ZL8hairquadPK7SkPointPK8SkRegionP9SkBlitteriPFvS1_iS4_S6_E + 719
    15  dm                                  0x000000010f8da838 _Z9hair_pathILN7SkPaint3CapE0EEvRK6SkPathRK12SkRasterClipP9SkBlitterPFvPK7SkPointiPK8SkRegionS9_E + 1048
    16  dm                                  0x000000010f8d86dc _ZN6SkScan12AntiHairPathERK6SkPathRK12SkRasterClipP9SkBlitter + 44
    17  dm                                  0x000000010f7da8ff _ZNK6SkDraw8drawPathERK6SkPathRK7SkPaintPK8SkMatrixbbP9SkBlitter + 2239
    18  dm                                  0x000000010f774993 _ZNK6SkDraw8drawPathERK6SkPathRK7SkPaintPK8SkMatrixb + 83
    19  dm                                  0x000000010f774031 _ZN14SkBitmapDevice8drawPathERK6SkDrawRK6SkPathRK7SkPaintPK8SkMatrixb + 97
    20  dm                                  0x000000010f773f6b _ZN14SkBitmapDevice8drawOvalERK6SkDrawRK6SkRectRK7SkPaint + 139
    21  dm                                  0x000000010f7b5072 _ZN8SkCanvas10onDrawOvalERK6SkRectRK7SkPaint + 626
    22  dm                                  0x000000010f7b38a5 _ZN8SkCanvas8drawOvalERK6SkRectRK7SkPaint + 69
    23  dm                                  0x000000010f7b9ee6 _ZN8SkCanvas10drawCircleEfffRK7SkPaint + 294
    24  dm                                  0x000000010f614039 _ZN6skiagm14DstReadShuffle9drawShapeEP8SkCanvasP7SkPaintNS0_9ShapeTypeE + 249
    25  dm                                  0x000000010f613b89 _ZN6skiagm14DstReadShuffle6onDrawEP8SkCanvas + 425
    26  dm                                  0x000000010f268b17 _ZN6skiagm2GM11drawContentEP8SkCanvas + 71
    27  dm                                  0x000000010f268a6c _ZN6skiagm2GM4drawEP8SkCanvas + 60
    28  dm                                  0x000000010f25186b _ZNK2DM5GMSrc4drawEP8SkCanvas + 123
    29  dm                                  0x000000010f256de7 _ZNK2DM10RasterSink4drawERKNS_3SrcEP8SkBitmapP9SkWStreamP8SkString + 295
    30  dm                                  0x000000010f246a96 _ZN4Task3RunERKS_ + 358
    31  dm                                  0x000000010f2447e5 _ZZ7dm_mainvENK3$_3clEv + 21
    32  dm                                  0x000000010f2447bd _ZNSt3__128__invoke_void_return_wrapperIvE6__callIJRZ7dm_mainvE3$_3EEEvDpOT_ + 45
    33  dm                                  0x000000010f24475c _ZNSt3__110__function6__funcIZ7dm_mainvE3$_3NS_9allocatorIS2_EEFvvEEclEv + 44
    34  dm                                  0x000000010f406aba _ZNKSt3__18functionIFvvEEclEv + 26
    35  dm                                  0x000000010f8fc168 _ZN12_GLOBAL__N_110ThreadPool4WaitEP8SkAtomicIiL15sk_memory_order5EE + 328
    36  dm                                  0x000000010f8fc00c _ZN11SkTaskGroup4waitEv + 28
    37  dm                                  0x000000010f23e9c4 _Z7dm_mainv + 1940
    38  dm                                  0x000000010f23fa77 main + 39
    39  dm                                  0x000000010f23e1a4 start + 52
    40  ???                                 0x0000000000000007 0x0 + 7

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1753503002

Review URL: https://codereview.chromium.org/1753503002

1 files changed, 20 insertions, 6 deletions

diff --git a/dm/DM.cpp b/dm/DM.cpp
index 4279ea37eb..0190262787 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -165,23 +165,37 @@ static std::atomic<bool> in_signal_handler{false};
     }
     static void setup_crash_handler() { SetUnhandledExceptionFilter(handler); }
 
-#else
+#elif !defined(SK_BUILD_FOR_ANDROID)
+    #include <execinfo.h>
     #include <signal.h>
+    #include <stdlib.h>
 
     static void setup_crash_handler() {
         const int kSignals[] = { SIGABRT, SIGBUS, SIGFPE, SIGILL, SIGSEGV };
         for (int sig : kSignals) {
             signal(sig, [](int sig) {
                 if (!in_signal_handler.exchange(true)) {
-                    SkDebugf("\nCaught signal %d [%s].\n", sig, strsignal(sig));
-                    print_status();
+                    SkAutoTAcquire<SkSpinlock> lock(gMutex);
+                    SkDebugf("\nCaught signal %d [%s], was running:\n", sig, strsignal(sig));
+                    for (auto& task : gRunning) {
+                        SkDebugf("\t%s\n", task.c_str());
+                    }
+
+                    void* stack[64];
+                    int count = backtrace(stack, SK_ARRAY_COUNT(stack));
+                    char** symbols = backtrace_symbols(stack, count);
+                    SkDebugf("\nStack trace:\n");
+                    for (int i = 0; i < count; i++) {
+                        SkDebugf("    %s\n", symbols[i]);
+                    }
                 }
-                // Reraise this signal to the default handler... hopefully, exit.
-                signal(sig, SIG_DFL);
-                raise(sig);
+                _Exit(sig);
             });
         }
     }
+
+#else  // Android
+    static void setup_crash_handler() {}
 #endif
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/