Add m-esr52 at 52.6.0

1 files changed, 404 insertions, 0 deletions

diff --git a/toolkit/xre/nsSigHandlers.cpp b/toolkit/xre/nsSigHandlers.cpp
new file mode 100644
index 000000000..098d9ae7e
--- /dev/null
+++ b/toolkit/xre/nsSigHandlers.cpp
@@ -0,0 +1,404 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * This module is supposed to abstract signal handling away from the other
+ * platforms that do not support it.
+ */
+
+#include "nsSigHandlers.h"
+
+#ifdef XP_UNIX
+
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include "prthread.h"
+#include "plstr.h"
+#include "prenv.h"
+#include "nsDebug.h"
+#include "nsXULAppAPI.h"
+
+#if defined(LINUX)
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <unistd.h>
+#include <stdlib.h> // atoi
+#include <sys/prctl.h>
+#ifndef ANDROID // no Android impl
+#  include <ucontext.h>
+#endif
+#endif
+
+#if defined(SOLARIS)
+#include <sys/resource.h>
+#include <ucontext.h>
+#endif
+
+static const char* gProgname = "huh?";
+
+// Note: some tests manipulate this value.
+unsigned int _gdb_sleep_duration = 300;
+
+#if defined(LINUX) && defined(DEBUG) && \
+      (defined(__i386) || defined(__x86_64) || defined(PPC))
+#define CRAWL_STACK_ON_SIGSEGV
+#endif
+
+#ifndef PR_SET_PTRACER
+#define PR_SET_PTRACER 0x59616d61
+#endif
+#ifndef PR_SET_PTRACER_ANY
+#define PR_SET_PTRACER_ANY ((unsigned long)-1)
+#endif
+
+#if defined(CRAWL_STACK_ON_SIGSEGV)
+
+#include <unistd.h>
+#include "nsISupportsUtils.h"
+#include "mozilla/StackWalk.h"
+
+// NB: keep me up to date with the same variable in
+// ipc/chromium/chrome/common/ipc_channel_posix.cc
+static const int kClientChannelFd = 3;
+
+extern "C" {
+
+static void PrintStackFrame(uint32_t aFrameNumber, void *aPC, void *aSP,
+                            void *aClosure)
+{
+  char buf[1024];
+  MozCodeAddressDetails details;
+
+  MozDescribeCodeAddress(aPC, &details);
+  MozFormatCodeAddressDetails(buf, sizeof(buf), aFrameNumber, aPC, &details);
+  fprintf(stdout, "%s\n", buf);
+  fflush(stdout);
+}
+
+}
+
+void
+ah_crap_handler(int signum)
+{
+  printf("\nProgram %s (pid = %d) received signal %d.\n",
+         gProgname,
+         getpid(),
+         signum);
+
+  printf("Stack:\n");
+  MozStackWalk(PrintStackFrame, /* skipFrames */ 2, /* maxFrames */ 0,
+               nullptr, 0, nullptr);
+
+  printf("Sleeping for %d seconds.\n",_gdb_sleep_duration);
+  printf("Type 'gdb %s %d' to attach your debugger to this thread.\n",
+         gProgname,
+         getpid());
+
+  // Allow us to be ptraced by gdb on Linux with Yama restrictions enabled.
+  prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY);
+
+  sleep(_gdb_sleep_duration);
+
+  printf("Done sleeping...\n");
+
+  _exit(signum);
+}
+
+void
+child_ah_crap_handler(int signum)
+{
+  if (!getenv("MOZ_DONT_UNBLOCK_PARENT_ON_CHILD_CRASH"))
+    close(kClientChannelFd);
+  ah_crap_handler(signum);
+}
+
+#endif // CRAWL_STACK_ON_SIGSEGV
+
+#ifdef MOZ_WIDGET_GTK
+// Need this include for version test below.
+#include <glib.h>
+#endif
+
+#if defined(MOZ_WIDGET_GTK) && (GLIB_MAJOR_VERSION > 2 || (GLIB_MAJOR_VERSION == 2 && GLIB_MINOR_VERSION >= 6))
+
+static GLogFunc orig_log_func = nullptr;
+
+extern "C" {
+static void
+my_glib_log_func(const gchar *log_domain, GLogLevelFlags log_level,
+                 const gchar *message, gpointer user_data);
+}
+
+/* static */ void
+my_glib_log_func(const gchar *log_domain, GLogLevelFlags log_level,
+                 const gchar *message, gpointer user_data)
+{
+  if (log_level & (G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION)) {
+    NS_DebugBreak(NS_DEBUG_ASSERTION, message, "glib assertion", __FILE__, __LINE__);
+  } else if (log_level & (G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING)) {
+    NS_DebugBreak(NS_DEBUG_WARNING, message, "glib warning", __FILE__, __LINE__);
+  }
+
+  orig_log_func(log_domain, log_level, message, nullptr);
+}
+
+#endif
+
+#ifdef SA_SIGINFO
+static void fpehandler(int signum, siginfo_t *si, void *context)
+{
+  /* Integer divide by zero or integer overflow. */
+  /* Note: FPE_INTOVF is ignored on Intel, PowerPC and SPARC systems. */
+  if (si->si_code == FPE_INTDIV || si->si_code == FPE_INTOVF) {
+    NS_DebugBreak(NS_DEBUG_ABORT, "Divide by zero", nullptr, __FILE__, __LINE__);
+  }
+
+#ifdef XP_MACOSX
+  ucontext_t *uc = (ucontext_t *)context;
+
+#if defined(__i386__) || defined(__amd64__)
+  _STRUCT_FP_CONTROL *ctrl = &uc->uc_mcontext->__fs.__fpu_fcw;
+  ctrl->__invalid = ctrl->__denorm = ctrl->__zdiv = ctrl->__ovrfl = ctrl->__undfl = ctrl->__precis = 1;
+
+  _STRUCT_FP_STATUS *status = &uc->uc_mcontext->__fs.__fpu_fsw;
+  status->__invalid = status->__denorm = status->__zdiv = status->__ovrfl = status->__undfl =
+    status->__precis = status->__stkflt = status->__errsumm = 0;
+
+  uint32_t *mxcsr = &uc->uc_mcontext->__fs.__fpu_mxcsr;
+  *mxcsr |= SSE_EXCEPTION_MASK; /* disable all SSE exceptions */
+  *mxcsr &= ~SSE_STATUS_FLAGS; /* clear all pending SSE exceptions */
+#endif
+#endif
+#if defined(LINUX) && !defined(ANDROID)
+  ucontext_t *uc = (ucontext_t *)context;
+
+#if defined(__i386__)
+  /*
+   * It seems that we have no access to mxcsr on Linux. libc
+   * seems to be translating cw/sw to mxcsr.
+   */
+  unsigned long int *cw = &uc->uc_mcontext.fpregs->cw;
+  *cw |= FPU_EXCEPTION_MASK;
+
+  unsigned long int *sw = &uc->uc_mcontext.fpregs->sw;
+  *sw &= ~FPU_STATUS_FLAGS;
+#endif
+#if defined(__amd64__)
+  uint16_t *cw = &uc->uc_mcontext.fpregs->cwd;
+  *cw |= FPU_EXCEPTION_MASK;
+
+  uint16_t *sw = &uc->uc_mcontext.fpregs->swd;
+  *sw &= ~FPU_STATUS_FLAGS;
+
+  uint32_t *mxcsr = &uc->uc_mcontext.fpregs->mxcsr;
+  *mxcsr |= SSE_EXCEPTION_MASK; /* disable all SSE exceptions */
+  *mxcsr &= ~SSE_STATUS_FLAGS; /* clear all pending SSE exceptions */
+#endif
+#endif
+#ifdef SOLARIS
+  ucontext_t *uc = (ucontext_t *)context;
+
+#if defined(__i386)
+  uint32_t *cw = &uc->uc_mcontext.fpregs.fp_reg_set.fpchip_state.state[0];
+  *cw |= FPU_EXCEPTION_MASK;
+
+  uint32_t *sw = &uc->uc_mcontext.fpregs.fp_reg_set.fpchip_state.state[1];
+  *sw &= ~FPU_STATUS_FLAGS;
+
+  /* address of the instruction that caused the exception */
+  uint32_t *ip = &uc->uc_mcontext.fpregs.fp_reg_set.fpchip_state.state[3];
+  uc->uc_mcontext.gregs[REG_PC] = *ip;
+#endif
+#if defined(__amd64__)
+  uint16_t *cw = &uc->uc_mcontext.fpregs.fp_reg_set.fpchip_state.cw;
+  *cw |= FPU_EXCEPTION_MASK;
+
+  uint16_t *sw = &uc->uc_mcontext.fpregs.fp_reg_set.fpchip_state.sw;
+  *sw &= ~FPU_STATUS_FLAGS;
+
+  uint32_t *mxcsr = &uc->uc_mcontext.fpregs.fp_reg_set.fpchip_state.mxcsr;
+  *mxcsr |= SSE_EXCEPTION_MASK; /* disable all SSE exceptions */
+  *mxcsr &= ~SSE_STATUS_FLAGS; /* clear all pending SSE exceptions */
+#endif
+#endif
+}
+#endif
+
+void InstallSignalHandlers(const char *aProgname)
+{
+  const char* tmp = PL_strdup(aProgname);
+  if (tmp) {
+    gProgname = tmp;
+  }
+
+  const char *gdbSleep = PR_GetEnv("MOZ_GDB_SLEEP");
+  if (gdbSleep && *gdbSleep)
+  {
+    unsigned int s;
+    if (1 == sscanf(gdbSleep, "%u", &s)) {
+      _gdb_sleep_duration = s;
+    }
+  }
+
+#if defined(CRAWL_STACK_ON_SIGSEGV)
+  if (!getenv("XRE_NO_WINDOWS_CRASH_DIALOG")) {
+    void (*crap_handler)(int) =
+      GeckoProcessType_Default != XRE_GetProcessType() ?
+          child_ah_crap_handler :
+          ah_crap_handler;
+    signal(SIGSEGV, crap_handler);
+    signal(SIGILL, crap_handler);
+    signal(SIGABRT, crap_handler);
+  }
+#endif // CRAWL_STACK_ON_SIGSEGV
+
+#ifdef SA_SIGINFO
+  /* Install a handler for floating point exceptions and disable them if they occur. */
+  struct sigaction sa, osa;
+  sa.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
+  sa.sa_sigaction = fpehandler;
+  sigemptyset(&sa.sa_mask);
+  sigaction(SIGFPE, &sa, &osa);
+#endif
+
+  if (!XRE_IsParentProcess()) {
+    /*
+     * If the user is debugging a Gecko parent process in gdb and hits ^C to
+     * suspend, a SIGINT signal will be sent to the child. We ignore this signal
+     * so the child isn't killed.
+     */
+    signal(SIGINT, SIG_IGN);
+  }
+
+#if defined(DEBUG) && defined(LINUX)
+  const char *memLimit = PR_GetEnv("MOZ_MEM_LIMIT");
+  if (memLimit && *memLimit)
+  {
+    long m = atoi(memLimit);
+    m *= (1024*1024);
+    struct rlimit r;
+    r.rlim_cur = m;
+    r.rlim_max = m;
+    setrlimit(RLIMIT_AS, &r);
+  }
+#endif
+
+#if defined(SOLARIS)
+#define NOFILES 512
+
+    // Boost Solaris file descriptors
+    {
+	struct rlimit rl;
+	
+	if (getrlimit(RLIMIT_NOFILE, &rl) == 0)
+
+	    if (rl.rlim_cur < NOFILES) {
+		rl.rlim_cur = NOFILES;
+
+		if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
+		    perror("setrlimit(RLIMIT_NOFILE)");
+		    fprintf(stderr, "Cannot exceed hard limit for open files");
+		}
+#if defined(DEBUG)
+	    	if (getrlimit(RLIMIT_NOFILE, &rl) == 0)
+		    printf("File descriptors set to %d\n", rl.rlim_cur);
+#endif //DEBUG
+	    }
+    }
+#endif //SOLARIS
+
+#if defined(MOZ_WIDGET_GTK) && (GLIB_MAJOR_VERSION > 2 || (GLIB_MAJOR_VERSION == 2 && GLIB_MINOR_VERSION >= 6))
+  const char *assertString = PR_GetEnv("XPCOM_DEBUG_BREAK");
+  if (assertString &&
+      (!strcmp(assertString, "suspend") ||
+       !strcmp(assertString, "stack") ||
+       !strcmp(assertString, "abort") ||
+       !strcmp(assertString, "trap") ||
+       !strcmp(assertString, "break"))) {
+    // Override the default glib logging function so we get stacks for it too.
+    orig_log_func = g_log_set_default_handler(my_glib_log_func, nullptr);
+  }
+#endif
+}
+
+#elif XP_WIN
+
+#include <windows.h>
+
+#ifdef _M_IX86
+/*
+ * WinNT.h prior to SDK7 does not expose the structure of the ExtendedRegisters for ia86.
+ * We known that MxCsr is at offset 0x18 and is a DWORD.
+ */
+#define MXCSR(ctx) (*(DWORD *)(((BYTE *)(ctx)->ExtendedRegisters) + 0x18))
+#endif
+
+#ifdef _M_X64
+#define MXCSR(ctx) (ctx)->MxCsr
+#endif
+
+#if defined(_M_IX86) || defined(_M_X64)
+
+#ifdef _M_X64
+#define X87CW(ctx) (ctx)->FltSave.ControlWord
+#define X87SW(ctx) (ctx)->FltSave.StatusWord
+#else
+#define X87CW(ctx) (ctx)->FloatSave.ControlWord
+#define X87SW(ctx) (ctx)->FloatSave.StatusWord
+#endif
+
+static LPTOP_LEVEL_EXCEPTION_FILTER gFPEPreviousFilter;
+
+LONG __stdcall FpeHandler(PEXCEPTION_POINTERS pe)
+{
+  PEXCEPTION_RECORD e = (PEXCEPTION_RECORD)pe->ExceptionRecord;
+  CONTEXT *c = (CONTEXT*)pe->ContextRecord;
+
+  switch (e->ExceptionCode) {
+    case STATUS_FLOAT_DENORMAL_OPERAND:
+    case STATUS_FLOAT_DIVIDE_BY_ZERO:
+    case STATUS_FLOAT_INEXACT_RESULT:
+    case STATUS_FLOAT_INVALID_OPERATION:
+    case STATUS_FLOAT_OVERFLOW:
+    case STATUS_FLOAT_STACK_CHECK:
+    case STATUS_FLOAT_UNDERFLOW:
+    case STATUS_FLOAT_MULTIPLE_FAULTS:
+    case STATUS_FLOAT_MULTIPLE_TRAPS:
+      X87CW(c) |= FPU_EXCEPTION_MASK; /* disable all FPU exceptions */
+      X87SW(c) &= ~FPU_STATUS_FLAGS;  /* clear all pending FPU exceptions */
+#ifdef _M_IX86
+      if (c->ContextFlags & CONTEXT_EXTENDED_REGISTERS) {
+#endif
+        MXCSR(c) |= SSE_EXCEPTION_MASK; /* disable all SSE exceptions */
+        MXCSR(c) &= ~SSE_STATUS_FLAGS;  /* clear all pending SSE exceptions */
+#ifdef _M_IX86
+      }
+#endif
+      return EXCEPTION_CONTINUE_EXECUTION;
+  }
+  LONG action = EXCEPTION_CONTINUE_SEARCH;
+  if (gFPEPreviousFilter)
+    action = gFPEPreviousFilter(pe);
+
+  return action;
+}
+
+void InstallSignalHandlers(const char *aProgname)
+{
+  gFPEPreviousFilter = SetUnhandledExceptionFilter(FpeHandler);
+}
+
+#else
+
+void InstallSignalHandlers(const char *aProgname)
+{
+}
+
+#endif
+
+#else
+#error No signal handling implementation for this platform.
+#endif