diff options
| -rw-r--r-- | Documentation/technical/api-run-command.txt | 5 | ||||
| -rw-r--r-- | compat/mingw.h | 2 | ||||
| -rw-r--r-- | compat/win32/pthread.c | 8 | ||||
| -rw-r--r-- | compat/win32/pthread.h | 25 | ||||
| -rw-r--r-- | git-compat-util.h | 1 | ||||
| -rw-r--r-- | http-backend.c | 6 | ||||
| -rw-r--r-- | run-command.c | 75 | ||||
| -rw-r--r-- | run-command.h | 8 | ||||
| -rwxr-xr-x | t/t5530-upload-pack-error.sh | 18 | ||||
| -rw-r--r-- | usage.c | 10 |
10 files changed, 117 insertions, 41 deletions
diff --git a/Documentation/technical/api-run-command.txt b/Documentation/technical/api-run-command.txt index 44876fa703..f18b4f4817 100644 --- a/Documentation/technical/api-run-command.txt +++ b/Documentation/technical/api-run-command.txt @@ -231,8 +231,9 @@ The function pointer in .proc has the following signature: There are serious restrictions on what the asynchronous function can do -because this facility is implemented by a pipe to a forked process on -UNIX, but by a thread in the same address space on Windows: +because this facility is implemented by a thread in the same address +space on most platforms (when pthreads is available), but by a pipe to +a forked process otherwise: . It cannot change the program's state (global variables, environment, etc.) in a way that the caller notices; in other words, .in and .out diff --git a/compat/mingw.h b/compat/mingw.h index f465566b7a..3b2477be5f 100644 --- a/compat/mingw.h +++ b/compat/mingw.h @@ -89,7 +89,7 @@ static inline int getuid() { return 1; } static inline struct passwd *getpwnam(const char *name) { return NULL; } -static inline int fcntl(int fd, int cmd, long arg) +static inline int fcntl(int fd, int cmd, ...) { if (cmd == F_GETFD || cmd == F_SETFD) return 0; diff --git a/compat/win32/pthread.c b/compat/win32/pthread.c index 0f949fc425..010e875ec4 100644 --- a/compat/win32/pthread.c +++ b/compat/win32/pthread.c @@ -16,6 +16,7 @@ static unsigned __stdcall win32_start_routine(void *arg) { pthread_t *thread = arg; + thread->tid = GetCurrentThreadId(); thread->arg = thread->start_routine(thread->arg); return 0; } @@ -49,6 +50,13 @@ int win32_pthread_join(pthread_t *thread, void **value_ptr) } } +pthread_t pthread_self(void) +{ + pthread_t t = { 0 }; + t.tid = GetCurrentThreadId(); + return t; +} + int pthread_cond_init(pthread_cond_t *cond, const void *unused) { cond->waiters = 0; diff --git a/compat/win32/pthread.h b/compat/win32/pthread.h index a45f8d66df..2e20548557 100644 --- a/compat/win32/pthread.h +++ b/compat/win32/pthread.h @@ -58,6 +58,7 @@ typedef struct { HANDLE handle; void *(*start_routine)(void*); void *arg; + DWORD tid; } pthread_t; extern int pthread_create(pthread_t *thread, const void *unused, @@ -71,4 +72,28 @@ extern int pthread_create(pthread_t *thread, const void *unused, extern int win32_pthread_join(pthread_t *thread, void **value_ptr); +#define pthread_equal(t1, t2) ((t1).tid == (t2).tid) +extern pthread_t pthread_self(void); + +static inline int pthread_exit(void *ret) +{ + ExitThread((DWORD)ret); +} + +typedef DWORD pthread_key_t; +static inline int pthread_key_create(pthread_key_t *keyp, void (*destructor)(void *value)) +{ + return (*keyp = TlsAlloc()) == TLS_OUT_OF_INDEXES ? EAGAIN : 0; +} + +static inline int pthread_setspecific(pthread_key_t key, const void *value) +{ + return TlsSetValue(key, (void *)value) ? 0 : EINVAL; +} + +static inline void *pthread_getspecific(pthread_key_t key) +{ + return TlsGetValue(key); +} + #endif /* PTHREAD_H */ diff --git a/git-compat-util.h b/git-compat-util.h index c9d53397ad..02a73eeb66 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -200,6 +200,7 @@ extern char *gitbasename(char *); #include "compat/bswap.h" /* General helper functions */ +extern void vreportf(const char *prefix, const char *err, va_list params); extern NORETURN void usage(const char *err); extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); diff --git a/http-backend.c b/http-backend.c index f0e787e37d..44ce6bb32b 100644 --- a/http-backend.c +++ b/http-backend.c @@ -488,14 +488,12 @@ static NORETURN void die_webcgi(const char *err, va_list params) static int dead; if (!dead) { - char buffer[1000]; dead = 1; - - vsnprintf(buffer, sizeof(buffer), err, params); - fprintf(stderr, "fatal: %s\n", buffer); http_status(500, "Internal Server Error"); hdr_nocache(); end_headers(); + + vreportf("fatal: ", err, params); } exit(0); /* we successfully reported a failure ;-) */ } diff --git a/run-command.c b/run-command.c index c7793f50fb..2a1041ef65 100644 --- a/run-command.c +++ b/run-command.c @@ -84,6 +84,7 @@ static NORETURN void die_child(const char *err, va_list params) unused = write(child_err, "\n", 1); exit(128); } +#endif static inline void set_cloexec(int fd) { @@ -91,7 +92,6 @@ static inline void set_cloexec(int fd) if (flags >= 0) fcntl(fd, F_SETFD, flags | FD_CLOEXEC); } -#endif static int wait_or_whine(pid_t pid, const char *argv0, int silent_exec_failure) { @@ -449,11 +449,35 @@ int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const return run_command(&cmd); } -#ifdef WIN32 -static unsigned __stdcall run_thread(void *data) +#ifndef NO_PTHREADS +static pthread_t main_thread; +static int main_thread_set; +static pthread_key_t async_key; + +static void *run_thread(void *data) { struct async *async = data; - return async->proc(async->proc_in, async->proc_out, async->data); + intptr_t ret; + + pthread_setspecific(async_key, async); + ret = async->proc(async->proc_in, async->proc_out, async->data); + return (void *)ret; +} + +static NORETURN void die_async(const char *err, va_list params) +{ + vreportf("fatal: ", err, params); + + if (!pthread_equal(main_thread, pthread_self())) { + struct async *async = pthread_getspecific(async_key); + if (async->proc_in >= 0) + close(async->proc_in); + if (async->proc_out >= 0) + close(async->proc_out); + pthread_exit((void *)128); + } + + exit(128); } #endif @@ -499,7 +523,7 @@ int start_async(struct async *async) else proc_out = -1; -#ifndef WIN32 +#ifdef NO_PTHREADS /* Flush stdio before fork() to avoid cloning buffers */ fflush(NULL); @@ -526,12 +550,29 @@ int start_async(struct async *async) else if (async->out) close(async->out); #else + if (!main_thread_set) { + /* + * We assume that the first time that start_async is called + * it is from the main thread. + */ + main_thread_set = 1; + main_thread = pthread_self(); + pthread_key_create(&async_key, NULL); + set_die_routine(die_async); + } + + if (proc_in >= 0) + set_cloexec(proc_in); + if (proc_out >= 0) + set_cloexec(proc_out); async->proc_in = proc_in; async->proc_out = proc_out; - async->tid = (HANDLE) _beginthreadex(NULL, 0, run_thread, async, 0, NULL); - if (!async->tid) { - error("cannot create thread: %s", strerror(errno)); - goto error; + { + int err = pthread_create(&async->tid, NULL, run_thread, async); + if (err) { + error("cannot create thread: %s", strerror(err)); + goto error; + } } #endif return 0; @@ -551,17 +592,15 @@ error: int finish_async(struct async *async) { -#ifndef WIN32 - int ret = wait_or_whine(async->pid, "child process", 0); +#ifdef NO_PTHREADS + return wait_or_whine(async->pid, "child process", 0); #else - DWORD ret = 0; - if (WaitForSingleObject(async->tid, INFINITE) != WAIT_OBJECT_0) - ret = error("waiting for thread failed: %lu", GetLastError()); - else if (!GetExitCodeThread(async->tid, &ret)) - ret = error("cannot get thread exit code: %lu", GetLastError()); - CloseHandle(async->tid); + void *ret = (void *)(intptr_t)(-1); + + if (pthread_join(async->tid, &ret)) + error("pthread_join failed"); + return (int)(intptr_t)ret; #endif - return ret; } int run_hook(const char *index_file, const char *name, ...) diff --git a/run-command.h b/run-command.h index 94619f52d9..56491b9f23 100644 --- a/run-command.h +++ b/run-command.h @@ -1,6 +1,10 @@ #ifndef RUN_COMMAND_H #define RUN_COMMAND_H +#ifndef NO_PTHREADS +#include <pthread.h> +#endif + struct child_process { const char **argv; pid_t pid; @@ -74,10 +78,10 @@ struct async { void *data; int in; /* caller writes here and closes it */ int out; /* caller reads from here and closes it */ -#ifndef WIN32 +#ifdef NO_PTHREADS pid_t pid; #else - HANDLE tid; + pthread_t tid; int proc_in; int proc_out; #endif diff --git a/t/t5530-upload-pack-error.sh b/t/t5530-upload-pack-error.sh index a696b8791b..044603c26e 100755 --- a/t/t5530-upload-pack-error.sh +++ b/t/t5530-upload-pack-error.sh @@ -32,9 +32,9 @@ test_expect_success 'fsck fails' ' test_expect_success 'upload-pack fails due to error in pack-objects packing' ' - ! echo "0032want $(git rev-parse HEAD) -00000009done -0000" | git upload-pack . > /dev/null 2> output.err && + printf "0032want %s\n00000009done\n0000" \ + $(git rev-parse HEAD) >input && + test_must_fail git upload-pack . <input >/dev/null 2>output.err && grep "unable to read" output.err && grep "pack-objects died" output.err ' @@ -51,9 +51,9 @@ test_expect_success 'fsck fails' ' ' test_expect_success 'upload-pack fails due to error in rev-list' ' - ! echo "0032want $(git rev-parse HEAD) -0034shallow $(git rev-parse HEAD^)00000009done -0000" | git upload-pack . > /dev/null 2> output.err && + printf "0032want %s\n0034shallow %s00000009done\n0000" \ + $(git rev-parse HEAD) $(git rev-parse HEAD^) >input && + test_must_fail git upload-pack . <input >/dev/null 2>output.err && # pack-objects survived grep "Total.*, reused" output.err && # but there was an error, which must have been in rev-list @@ -62,9 +62,9 @@ test_expect_success 'upload-pack fails due to error in rev-list' ' test_expect_success 'upload-pack fails due to error in pack-objects enumeration' ' - ! echo "0032want $(git rev-parse HEAD) -00000009done -0000" | git upload-pack . > /dev/null 2> output.err && + printf "0032want %s\n00000009done\n0000" \ + $(git rev-parse HEAD) >input && + test_must_fail git upload-pack . <input >/dev/null 2>output.err && grep "bad tree object" output.err && grep "pack-objects died" output.err ' @@ -5,7 +5,7 @@ */ #include "git-compat-util.h" -static void report(const char *prefix, const char *err, va_list params) +void vreportf(const char *prefix, const char *err, va_list params) { char msg[4096]; vsnprintf(msg, sizeof(msg), err, params); @@ -14,24 +14,24 @@ static void report(const char *prefix, const char *err, va_list params) static NORETURN void usage_builtin(const char *err, va_list params) { - report("usage: ", err, params); + vreportf("usage: ", err, params); exit(129); } static NORETURN void die_builtin(const char *err, va_list params) { - report("fatal: ", err, params); + vreportf("fatal: ", err, params); exit(128); } static void error_builtin(const char *err, va_list params) { - report("error: ", err, params); + vreportf("error: ", err, params); } static void warn_builtin(const char *warn, va_list params) { - report("warning: ", warn, params); + vreportf("warning: ", warn, params); } /* If we are in a dlopen()ed .so write to a global variable would segfault |