diff options
Diffstat (limited to 'debuggerd/utility.cpp')
| -rw-r--r-- | debuggerd/utility.cpp | 187 |
1 files changed, 93 insertions, 94 deletions
diff --git a/debuggerd/utility.cpp b/debuggerd/utility.cpp index 41be982..35f061e 100644 --- a/debuggerd/utility.cpp +++ b/debuggerd/utility.cpp @@ -1,22 +1,20 @@ -/* system/debuggerd/utility.c -** -** Copyright 2008, The Android Open Source Project -** -** Licensed under the Apache License, Version 2.0 (the "License"); -** you may not use this file except in compliance with the License. -** You may obtain a copy of the License at -** -** http://www.apache.org/licenses/LICENSE-2.0 -** -** Unless required by applicable law or agreed to in writing, software -** distributed under the License is distributed on an "AS IS" BASIS, -** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -** See the License for the specific language governing permissions and -** limitations under the License. -*/ +/* + * Copyright 2008, The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ #include <stddef.h> -#include <stdbool.h> #include <stdio.h> #include <string.h> #include <errno.h> @@ -30,101 +28,102 @@ #include "utility.h" -const int sleep_time_usec = 50000; /* 0.05 seconds */ -const int max_total_sleep_usec = 10000000; /* 10 seconds */ +const int sleep_time_usec = 50000; // 0.05 seconds +const int max_total_sleep_usec = 10000000; // 10 seconds static int write_to_am(int fd, const char* buf, int len) { - int to_write = len; - while (to_write > 0) { - int written = TEMP_FAILURE_RETRY( write(fd, buf + len - to_write, to_write) ); - if (written < 0) { - /* hard failure */ - LOG("AM write failure (%d / %s)\n", errno, strerror(errno)); - return -1; - } - to_write -= written; + int to_write = len; + while (to_write > 0) { + int written = TEMP_FAILURE_RETRY( write(fd, buf + len - to_write, to_write) ); + if (written < 0) { + // hard failure + LOG("AM write failure (%d / %s)\n", errno, strerror(errno)); + return -1; } - return len; + to_write -= written; + } + return len; } -void _LOG(log_t* log, int scopeFlags, const char *fmt, ...) { - char buf[512]; - bool want_tfd_write; - bool want_log_write; - bool want_amfd_write; - int len = 0; +void _LOG(log_t* log, int scopeFlags, const char* fmt, ...) { + char buf[512]; + bool want_tfd_write; + bool want_log_write; + bool want_amfd_write; + int len = 0; - va_list ap; - va_start(ap, fmt); + va_list ap; + va_start(ap, fmt); - // where is the information going to go? - want_tfd_write = log && log->tfd >= 0; - want_log_write = IS_AT_FAULT(scopeFlags) && (!log || !log->quiet); - want_amfd_write = IS_AT_FAULT(scopeFlags) && !IS_SENSITIVE(scopeFlags) && log && log->amfd >= 0; + // where is the information going to go? + want_tfd_write = log && log->tfd >= 0; + want_log_write = IS_AT_FAULT(scopeFlags) && (!log || !log->quiet); + want_amfd_write = IS_AT_FAULT(scopeFlags) && !IS_SENSITIVE(scopeFlags) && log && log->amfd >= 0; - // if we're going to need the literal string, generate it once here - if (want_tfd_write || want_amfd_write) { - vsnprintf(buf, sizeof(buf), fmt, ap); - len = strlen(buf); - } + // if we're going to need the literal string, generate it once here + if (want_tfd_write || want_amfd_write) { + vsnprintf(buf, sizeof(buf), fmt, ap); + len = strlen(buf); + } - if (want_tfd_write) { - write(log->tfd, buf, len); - } + if (want_tfd_write) { + write(log->tfd, buf, len); + } - if (want_log_write) { - // whatever goes to logcat also goes to the Activity Manager - __android_log_vprint(ANDROID_LOG_INFO, "DEBUG", fmt, ap); - if (want_amfd_write && len > 0) { - int written = write_to_am(log->amfd, buf, len); - if (written <= 0) { - // timeout or other failure on write; stop informing the activity manager - log->amfd = -1; - } - } + if (want_log_write) { + // whatever goes to logcat also goes to the Activity Manager + __android_log_vprint(ANDROID_LOG_INFO, "DEBUG", fmt, ap); + if (want_amfd_write && len > 0) { + int written = write_to_am(log->amfd, buf, len); + if (written <= 0) { + // timeout or other failure on write; stop informing the activity manager + log->amfd = -1; + } } - va_end(ap); + } + va_end(ap); } int wait_for_signal(pid_t tid, int* total_sleep_time_usec) { - for (;;) { - int status; - pid_t n = waitpid(tid, &status, __WALL | WNOHANG); - if (n < 0) { - if(errno == EAGAIN) continue; - LOG("waitpid failed: %s\n", strerror(errno)); - return -1; - } else if (n > 0) { - XLOG("waitpid: n=%d status=%08x\n", n, status); - if (WIFSTOPPED(status)) { - return WSTOPSIG(status); - } else { - LOG("unexpected waitpid response: n=%d, status=%08x\n", n, status); - return -1; - } - } - - if (*total_sleep_time_usec > max_total_sleep_usec) { - LOG("timed out waiting for tid=%d to die\n", tid); - return -1; - } + for (;;) { + int status; + pid_t n = waitpid(tid, &status, __WALL | WNOHANG); + if (n < 0) { + if (errno == EAGAIN) + continue; + LOG("waitpid failed: %s\n", strerror(errno)); + return -1; + } else if (n > 0) { + XLOG("waitpid: n=%d status=%08x\n", n, status); + if (WIFSTOPPED(status)) { + return WSTOPSIG(status); + } else { + LOG("unexpected waitpid response: n=%d, status=%08x\n", n, status); + return -1; + } + } - /* not ready yet */ - XLOG("not ready yet\n"); - usleep(sleep_time_usec); - *total_sleep_time_usec += sleep_time_usec; + if (*total_sleep_time_usec > max_total_sleep_usec) { + LOG("timed out waiting for tid=%d to die\n", tid); + return -1; } + + // not ready yet + XLOG("not ready yet\n"); + usleep(sleep_time_usec); + *total_sleep_time_usec += sleep_time_usec; + } } void wait_for_stop(pid_t tid, int* total_sleep_time_usec) { - siginfo_t si; - while (TEMP_FAILURE_RETRY(ptrace(PTRACE_GETSIGINFO, tid, 0, &si)) < 0 && errno == ESRCH) { - if (*total_sleep_time_usec > max_total_sleep_usec) { - LOG("timed out waiting for tid=%d to stop\n", tid); - break; - } - - usleep(sleep_time_usec); - *total_sleep_time_usec += sleep_time_usec; + siginfo_t si; + while (TEMP_FAILURE_RETRY(ptrace(PTRACE_GETSIGINFO, tid, 0, &si)) < 0 && errno == ESRCH) { + if (*total_sleep_time_usec > max_total_sleep_usec) { + LOG("timed out waiting for tid=%d to stop\n", tid); + break; } + + usleep(sleep_time_usec); + *total_sleep_time_usec += sleep_time_usec; + } } |