diff options
Diffstat (limited to 'Zend/zend_gdb.c')
| -rw-r--r-- | Zend/zend_gdb.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/Zend/zend_gdb.c b/Zend/zend_gdb.c new file mode 100644 index 0000000000..0fff742048 --- /dev/null +++ b/Zend/zend_gdb.c @@ -0,0 +1,141 @@ +/* + +----------------------------------------------------------------------+ + | Zend Engine | + +----------------------------------------------------------------------+ + | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) | + +----------------------------------------------------------------------+ + | This source file is subject to version 2.00 of the Zend license, | + | that is bundled with this package in the file LICENSE, and is | + | available through the world-wide-web at the following url: | + | http://www.zend.com/license/2_00.txt. | + | If you did not receive a copy of the Zend license and are unable to | + | obtain it through the world-wide-web, please send a note to | + | license@zend.com so we can mail you a copy immediately. | + +----------------------------------------------------------------------+ + | Authors: Dmitry Stogov <dmitry@zend.com> | + | Xinchen Hui <xinchen.h@zend.com> | + +----------------------------------------------------------------------+ +*/ + +#include "zend.h" +#include "zend_gdb.h" + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> + +enum { + ZEND_GDBJIT_NOACTION, + ZEND_GDBJIT_REGISTER, + ZEND_GDBJIT_UNREGISTER +}; + +typedef struct _zend_gdbjit_code_entry { + struct _zend_gdbjit_code_entry *next_entry; + struct _zend_gdbjit_code_entry *prev_entry; + const char *symfile_addr; + uint64_t symfile_size; +} zend_gdbjit_code_entry; + +typedef struct _zend_gdbjit_descriptor { + uint32_t version; + uint32_t action_flag; + struct _zend_gdbjit_code_entry *relevant_entry; + struct _zend_gdbjit_code_entry *first_entry; +} zend_gdbjit_descriptor; + +ZEND_API zend_gdbjit_descriptor __jit_debug_descriptor = { + 1, ZEND_GDBJIT_NOACTION, NULL, NULL +}; + +ZEND_API zend_never_inline void __jit_debug_register_code() +{ + __asm__ __volatile__(""); +} + +ZEND_API int zend_gdb_register_code(const void *object, size_t size) +{ + zend_gdbjit_code_entry *entry; + + entry = malloc(sizeof(zend_gdbjit_code_entry) + size); + if (entry == NULL) { + return 0; + } + + entry->symfile_addr = ((char*)entry) + sizeof(zend_gdbjit_code_entry); + entry->symfile_size = size; + + memcpy((char *)entry->symfile_addr, object, size); + + entry->prev_entry = NULL; + entry->next_entry = __jit_debug_descriptor.first_entry; + + if (entry->next_entry) { + entry->next_entry->prev_entry = entry; + } + __jit_debug_descriptor.first_entry = entry; + + /* Notify GDB */ + __jit_debug_descriptor.relevant_entry = entry; + __jit_debug_descriptor.action_flag = ZEND_GDBJIT_REGISTER; + __jit_debug_register_code(); + + return 1; +} + +ZEND_API void zend_gdb_unregister_all(void) +{ + zend_gdbjit_code_entry *entry; + + __jit_debug_descriptor.action_flag = ZEND_GDBJIT_UNREGISTER; + while ((entry = __jit_debug_descriptor.first_entry)) { + __jit_debug_descriptor.first_entry = entry->next_entry; + if (entry->next_entry) { + entry->next_entry->prev_entry = NULL; + } + /* Notify GDB */ + __jit_debug_descriptor.relevant_entry = entry; + __jit_debug_register_code(); + + free(entry); + } +} + +ZEND_API int zend_gdb_present(void) +{ + int ret = 0; + int fd = open("/proc/self/status", O_RDONLY); + + if (fd > 0) { + char buf[1024]; + ssize_t n = read(fd, buf, sizeof(buf) - 1); + char *s; + pid_t pid; + + if (n > 0) { + buf[n] = 0; + s = strstr(buf, "TracerPid:"); + if (s) { + s += sizeof("TracerPid:") - 1; + while (*s == ' ' || *s == '\t') { + s++; + } + pid = atoi(s); + if (pid) { + char out[1024]; + sprintf(buf, "/proc/%d/exe", (int)pid); + if (readlink(buf, out, sizeof(out) - 1) > 0) { + if (strstr(out, "gdb")) { + ret = 1; + } + } + } + } + } + + close(fd); + } + + return ret; +} |