bug 595167 - Make Breakpad client libs work on Android. r=mwu a=blocking-fennec

toolkit/crashreporter/google-breakpad/src/client/linux/android_link.h

@@ -0,0 +1,4 @@
+#include <sys/exec_elf.h>
+#define ElfW(type)	_ElfW (Elf, ELFSIZE, type)
+#define _ElfW(e,w,t)	_ElfW_1 (e, w, _##t)
+#define _ElfW_1(e,w,t)	e##w##t

toolkit/crashreporter/google-breakpad/src/client/linux/android_ucontext.h

@@ -0,0 +1,46 @@
+#ifndef GOOGLE_BREAKPAD_CLIENT_LINUX_ANDROID_UCONTEXT_H_
+#define GOOGLE_BREAKPAD_CLIENT_LINUX_ANDROID_UCONTEXT_H_
+
+#include <signal.h>
+
+// Adapted from platform-linux.cc in V8
+#if !defined(__GLIBC__) && (defined(__arm__) || defined(__thumb__))
+// Android runs a fairly new Linux kernel, so signal info is there,
+// but the C library doesn't have the structs defined.
+
+struct sigcontext {
+  uint32_t trap_no;
+  uint32_t error_code;
+  uint32_t oldmask;
+  uint32_t arm_r0;
+  uint32_t arm_r1;
+  uint32_t arm_r2;
+  uint32_t arm_r3;
+  uint32_t arm_r4;
+  uint32_t arm_r5;
+  uint32_t arm_r6;
+  uint32_t arm_r7;
+  uint32_t arm_r8;
+  uint32_t arm_r9;
+  uint32_t arm_r10;
+  uint32_t arm_fp;
+  uint32_t arm_ip;
+  uint32_t arm_sp;
+  uint32_t arm_lr;
+  uint32_t arm_pc;
+  uint32_t arm_cpsr;
+  uint32_t fault_address;
+};
+typedef uint32_t __sigset_t;
+typedef struct sigcontext mcontext_t;
+typedef struct ucontext {
+  uint32_t uc_flags;
+  struct ucontext* uc_link;
+  stack_t uc_stack;
+  mcontext_t uc_mcontext;
+  __sigset_t uc_sigmask;
+} ucontext_t;
+
+#endif
+
+#endif  // GOOGLE_BREAKPAD_CLIENT_LINUX_ANDROID_UCONTEXT_H_

toolkit/crashreporter/google-breakpad/src/client/linux/handler/exception_handler.cc

@@ -73,12 +73,18 @@
 #include <stdio.h>
 #include <sys/mman.h>
 #include <sys/prctl.h>
+#if !defined(__ANDROID__)
 #include <sys/signal.h>
+#endif
 #include <sys/syscall.h>
+#if !defined(__ANDROID__)
 #include <sys/ucontext.h>
 #include <sys/user.h>
+#endif
 #include <sys/wait.h>
+#if !defined(__ANDROID__)
 #include <ucontext.h>
+#endif
 #include <unistd.h>
 
 #include <algorithm>
@@ -186,7 +192,7 @@ bool ExceptionHandler::InstallHandlers() {
   stack.ss_sp = signal_stack;
   stack.ss_size = kSigStackSize;
 
-  if (sigaltstack(&stack, NULL) == -1)
+  if (sys_sigaltstack(&stack, NULL) == -1)
     return false;
 
   struct sigaction sa;
@@ -310,7 +316,7 @@ bool ExceptionHandler::HandleSignal(int sig, siginfo_t* info, void* uc) {
     return false;
 
   // Allow ourselves to be dumped.
-  prctl(PR_SET_DUMPABLE, 1);
+  sys_prctl(PR_SET_DUMPABLE, 1);
   CrashContext context;
   memcpy(&context.siginfo, info, sizeof(siginfo_t));
   memcpy(&context.context, uc, sizeof(struct ucontext));

toolkit/crashreporter/google-breakpad/src/client/linux/handler/exception_handler.h

@@ -33,9 +33,11 @@
 #include <vector>
 #include <string>
 
+#include <pthread.h>
 #include <signal.h>
 #include <stdio.h>
 
+#include "client/linux/android_ucontext.h"
 #include "client/linux/crash_generation/crash_generation_client.h"
 #include "processor/scoped_ptr.h"
 

toolkit/crashreporter/google-breakpad/src/client/linux/minidump_writer/linux_dumper.cc

@@ -45,7 +45,9 @@
 #include <elf.h>
 #include <errno.h>
 #include <fcntl.h>
+#if !defined(__ANDROID__)
 #include <link.h>
+#endif
 
 #include <sys/types.h>
 #include <sys/ptrace.h>
@@ -117,11 +119,16 @@ inline bool IsMappedFileOpenUnsafe(
 bool GetThreadRegisters(ThreadInfo* info) {
   pid_t tid = info->tid;
 
-  if (sys_ptrace(PTRACE_GETREGS, tid, NULL, &info->regs) == -1 ||
-      sys_ptrace(PTRACE_GETFPREGS, tid, NULL, &info->fpregs) == -1) {
+  if (sys_ptrace(PTRACE_GETREGS, tid, NULL, &info->regs) == -1) {
     return false;
   }
 
+#if !defined(__ANDROID__)
+  if (sys_ptrace(PTRACE_GETFPREGS, tid, NULL, &info->fpregs) == -1) {
+    return false;
+  }
+#endif
+
 #if defined(__i386)
   if (sys_ptrace(PTRACE_GETFPXREGS, tid, NULL, &info->fpxregs) == -1)
     return false;
@@ -425,7 +432,7 @@ bool LinuxDumper::ThreadInfoGet(ThreadInfo* info) {
 #elif defined(__x86_64)
   memcpy(&stack_pointer, &info->regs.rsp, sizeof(info->regs.rsp));
 #elif defined(__ARM_EABI__)
-  memcpy(&stack_pointer, &info->regs.uregs[R13], sizeof(info->regs.uregs[R13]));
+  memcpy(&stack_pointer, &info->regs.ARM_sp, sizeof(info->regs.ARM_sp));
 #else
 #error "This code hasn't been ported to your platform yet."
 #endif

toolkit/crashreporter/google-breakpad/src/client/linux/minidump_writer/linux_dumper.h

@@ -34,18 +34,38 @@
 #include <linux/limits.h>
 #include <stdint.h>
 #include <sys/types.h>
+#if !defined(__ANDROID__)
 #include <sys/user.h>
+#endif
 
 #include "common/memory.h"
 #include "google_breakpad/common/minidump_format.h"
 
 namespace google_breakpad {
 
+#if defined(__i386) || defined(__x86_64)
 typedef typeof(((struct user*) 0)->u_debugreg[0]) debugreg_t;
+#endif
 
 // Typedef for our parsing of the auxv variables in /proc/pid/auxv.
 #if defined(__i386) || defined(__ARM_EABI__)
+#if !defined(__ANDROID__)
 typedef Elf32_auxv_t elf_aux_entry;
+#else
+// Android is missing this structure definition
+typedef struct
+{
+  uint32_t a_type;              /* Entry type */
+  union
+    {
+      uint32_t a_val;           /* Integer value */
+    } a_un;
+} elf_aux_entry;
+
+#if !defined(AT_SYSINFO_EHDR)
+#define AT_SYSINFO_EHDR 33
+#endif
+#endif  // __ANDROID__
 #elif defined(__x86_64__)
 typedef Elf64_auxv_t elf_aux_entry;
 #endif
@@ -77,8 +97,12 @@ struct ThreadInfo {
 
 #elif defined(__ARM_EABI__)
   // Mimicking how strace does this(see syscall.c, search for GETREGS)
+#if defined(__ANDROID__)
+  struct pt_regs regs;
+#else
   struct user_regs regs;
   struct user_fpregs fpregs;
+#endif  // __ANDROID__
 #endif
 };
 

toolkit/crashreporter/google-breakpad/src/client/linux/minidump_writer/minidump_writer.cc

@@ -50,11 +50,17 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#if defined(__ANDROID__)
+#include "client/linux/android_link.h"
+#else
 #include <link.h>
+#endif
 #include <stdio.h>
 #include <unistd.h>
+#if !defined(__ANDROID__)
 #include <sys/ucontext.h>
 #include <sys/user.h>
+#endif
 #include <sys/utsname.h>
 
 #include "client/minidump_file_writer.h"
@@ -62,6 +68,7 @@
 #include "google_breakpad/common/minidump_cpu_amd64.h"
 #include "google_breakpad/common/minidump_cpu_x86.h"
 
+#include "client/linux/android_ucontext.h"
 #include "client/linux/handler/exception_handler.h"
 #include "client/linux/minidump_writer/line_reader.h"
 #include "client/linux/minidump_writer/linux_dumper.h"
@@ -337,11 +344,13 @@ static void CPUFillFromThreadInfo(MDRawContextARM *out,
     out->iregs[i] = info.regs.uregs[i];
   // No CPSR register in ThreadInfo(it's not accessible via ptrace)
   out->cpsr = 0;
+#if !defined(__ANDROID__)
   out->float_save.fpscr = info.fpregs.fpsr |
     (static_cast<u_int64_t>(info.fpregs.fpcr) << 32);
   //TODO: sort this out, actually collect floating point registers
   memset(&out->float_save.regs, 0, sizeof(out->float_save.regs));
   memset(&out->float_save.extra, 0, sizeof(out->float_save.extra));
+#endif
 }
 
 static void CPUFillFromUContext(MDRawContextARM *out, const ucontext *uc,
@@ -375,11 +384,11 @@ static void CPUFillFromUContext(MDRawContextARM *out, const ucontext *uc,
 }
 
 static uintptr_t InstructionPointer(const ThreadInfo& info) {
-  return info.regs.uregs[R12];
+  return info.regs.ARM_ip;
 }
 
 static uintptr_t StackPointer(const ThreadInfo& info) {
-  return info.regs.uregs[R13];
+  return info.regs.ARM_sp;
 }
 
 static uintptr_t StackPointer(const ucontext* uc) {
@@ -457,7 +466,7 @@ class MinidumpWriter {
     // it to a MD_LINUX_DSO_DEBUG stream.
     struct r_debug* r_debug = NULL;
     uint32_t dynamic_length = 0;
-
+#if !defined(__ANDROID__)
     for (int i = 0;;) {
       ElfW(Dyn) dyn;
       dynamic_length += sizeof(dyn);
@@ -468,6 +477,7 @@ class MinidumpWriter {
       } else if (dyn.d_tag == DT_NULL)
         break;
     }
+#endif
 
     // A minidump file contains a number of tagged streams. This is the number
     // of stream which we write.
@@ -949,6 +959,9 @@ class MinidumpWriter {
 
   bool WriteDSODebugStream(MDRawDirectory* dirent, struct r_debug* r_debug,
                            uint32_t dynamic_length) {
+#if defined(__ANDROID__)
+    return false;
+#else
     // The caller provided us with a pointer to "struct r_debug". We can
     // look up the "r_map" field to get a linked list of all loaded DSOs.
     // Our list of DSOs potentially is different from the ones in the crashing
@@ -1022,6 +1035,7 @@ class MinidumpWriter {
     delete[] dso_debug_data;
 
     return true;
+#endif  // __ANDROID__
   }
 
  private:

toolkit/crashreporter/google-breakpad/src/common/linux/Makefile.in

@@ -50,9 +50,12 @@ LOCAL_INCLUDES 	= -I$(srcdir)/../..
 CPPSRCS	= \
   file_id.cc \
   guid_creator.cc \
-  http_upload.cc \
   $(NULL)
 
+ifneq (Android,$(OS_TARGET))
+CPPSRCS += http_upload.cc
+endif
+
 HOST_CPPSRCS = \
   dump_symbols.cc \
   file_id.cc \

toolkit/crashreporter/google-breakpad/src/common/linux/file_id.cc

@@ -38,7 +38,11 @@
 #include <assert.h>
 #include <elf.h>
 #include <fcntl.h>
+#if defined(__ANDROID__)
+#include "client/linux/android_link.h"
+#else
 #include <link.h>
+#endif
 #include <stdio.h>
 #include <string.h>
 #include <sys/mman.h>
@@ -71,7 +75,7 @@ FileID::FileID(const char* path) {
     reinterpret_cast<const ElfW(Ehdr)*>(elf_base);
   if (my_strncmp(elf_base, ELFMAG, SELFMAG) != 0)
     return false;
-#if __ELF_NATIVE_CLASS == 32
+#if __ELF_NATIVE_CLASS == 32 || ELFSIZE == 32
 #define ELFCLASS ELFCLASS32
 #else
 #define ELFCLASS ELFCLASS64