diff options
Diffstat (limited to 'breakpad/linux/linux_dumper.h')
| -rw-r--r-- | breakpad/linux/linux_dumper.h | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/breakpad/linux/linux_dumper.h b/breakpad/linux/linux_dumper.h index b6fc58a..ac4a470 100644 --- a/breakpad/linux/linux_dumper.h +++ b/breakpad/linux/linux_dumper.h @@ -30,6 +30,7 @@ #ifndef CLIENT_LINUX_HANDLER_LINUX_DUMPER_H_ #define CLIENT_LINUX_HANDLER_LINUX_DUMPER_H_ +#include <elf.h> #include <stdint.h> #include <sys/user.h> #include <linux/limits.h> @@ -38,7 +39,18 @@ namespace google_breakpad { -typedef typeof(((struct user *) 0)->u_debugreg[0]) debugreg_t; +typedef typeof(((struct user*) 0)->u_debugreg[0]) debugreg_t; + +// Typedef for our parsing of the auxv variables in /proc/pid/auxv. +#if defined(__i386) +typedef Elf32_auxv_t elf_aux_entry; +#elif defined(__x86_64__) +typedef Elf64_auxv_t elf_aux_entry; +#endif +// When we find the VDSO mapping in the process's address space, this +// is the name we use for it when writing it to the minidump. +// This should always be less than NAME_MAX! +const char kLinuxGateLibraryName[] = "linux-gate.so"; // We produce one of these structures for each thread in the crashed process. struct ThreadInfo { @@ -47,7 +59,7 @@ struct ThreadInfo { // Even on platforms where the stack grows down, the following will point to // the smallest address in the stack. - const void *stack; // pointer to the stack area + const void* stack; // pointer to the stack area size_t stack_len; // length of the stack to copy user_regs_struct regs; @@ -82,12 +94,12 @@ class LinuxDumper { // Read information about the given thread. Returns true on success. One must // have called |ThreadsSuspend| first. - bool ThreadInfoGet(pid_t tid, ThreadInfo *info); + bool ThreadInfoGet(pid_t tid, ThreadInfo* info); // These are only valid after a call to |Init|. const wasteful_vector<pid_t> &threads() { return threads_; } const wasteful_vector<MappingInfo*> &mappings() { return mappings_; } - const MappingInfo *FindMapping(const void *address) const; + const MappingInfo* FindMapping(const void* address) const; // Find a block of memory to take as the stack given the top of stack pointer. // stack: (output) the lowest address in the memory area @@ -95,15 +107,26 @@ class LinuxDumper { // stack_top: the current top of the stack bool GetStackInfo(const void** stack, size_t* stack_len, uintptr_t stack_top); - PageAllocator *allocator() { return &allocator_; } + PageAllocator* allocator() { return &allocator_; } // memcpy from a remote process. static void CopyFromProcess(void* dest, pid_t child, const void* src, size_t length); + // Builds a proc path for a certain pid for a node. path is a + // character array that is overwritten, and node is the final node + // without any slashes. + void BuildProcPath(char* path, pid_t pid, const char* node) const; + + // Utility method to find the location of where the kernel has + // mapped linux-gate.so in memory(shows up in /proc/pid/maps as + // [vdso], but we can't guarantee that it's the only virtual dynamic + // shared object. Parsing the auxilary vector for AT_SYSINFO_EHDR + // is the safest way to go.) + void* FindBeginningOfLinuxGateSharedLibrary(const pid_t pid) const; private: - bool EnumerateMappings(wasteful_vector<MappingInfo*> *result) const; - bool EnumerateThreads(wasteful_vector<pid_t> *result) const; + bool EnumerateMappings(wasteful_vector<MappingInfo*>* result) const; + bool EnumerateThreads(wasteful_vector<pid_t>* result) const; const pid_t pid_; |