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Merge "edify: Move State.script and State.errmsg to std::string."

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Treehugger Robot 2016-10-05 06:07:56 +00:00 committed by Gerrit Code Review
commit 8810634773
5 changed files with 57 additions and 88 deletions
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36
edify/edify_parser.cpp
View file

@ -24,21 +24,20 @@
* makes the tool less useful. We should either extend the tool or remove it.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <android-base/file.h>
#include "expr.h"
#include "parser.h"
void ExprDump(int depth, Expr* n, char* script) {
static void ExprDump(int depth, const Expr* n, const std::string& script) {
printf("%*s", depth*2, "");
char temp = script[n->end];
script[n->end] = '\0';
printf("%s %p (%d-%d) \"%s\"\n",
n->name == NULL ? "(NULL)" : n->name, n->fn, n->start, n->end,
script+n->start);
script[n->end] = temp;
script.substr(n->start, n->end - n->start).c_str());
for (int i = 0; i < n->argc; ++i) {
ExprDump(depth+1, n->argv[i], script);
}
@ -53,34 +52,25 @@ int main(int argc, char** argv) {
return 1;
}
FILE* f = fopen(argv[1], "r");
if (f == NULL) {
printf("%s: %s: No such file or directory\n", argv[0], argv[1]);
std::string buffer;
if (!android::base::ReadFileToString(argv[1], &buffer)) {
printf("%s: failed to read %s: %s\n", argv[0], argv[1], strerror(errno));
return 1;
}
char buffer[8192];
int size = fread(buffer, 1, 8191, f);
fclose(f);
buffer[size] = '\0';
Expr* root;
int error_count = 0;
int error = parse_string(buffer, &root, &error_count);
int error = parse_string(buffer.data(), &root, &error_count);
printf("parse returned %d; %d errors encountered\n", error, error_count);
if (error == 0 || error_count > 0) {
ExprDump(0, root, buffer);
State state;
state.cookie = NULL;
state.script = buffer;
state.errmsg = NULL;
State state(buffer, nullptr);
char* result = Evaluate(&state, root);
if (result == NULL) {
printf("result was NULL, message is: %s\n",
(state.errmsg == NULL ? "(NULL)" : state.errmsg));
free(state.errmsg);
(state.errmsg.empty() ? "(NULL)" : state.errmsg.c_str()));
} else {
printf("result is [%s]\n", result);
}

39
edify/expr.cpp
View file

@ -107,8 +107,7 @@ Value* ConcatFn(const char* name, State* state, int argc, Expr* argv[]) {
Value* IfElseFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 2 && argc != 3) {
free(state->errmsg);
state->errmsg = strdup("ifelse expects 2 or 3 arguments");
state->errmsg = "ifelse expects 2 or 3 arguments";
return NULL;
}
char* cond = Evaluate(state, argv[0]);
@ -134,11 +133,10 @@ Value* AbortFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc > 0) {
msg = Evaluate(state, argv[0]);
}
free(state->errmsg);
if (msg) {
state->errmsg = msg;
} else {
state->errmsg = strdup("called abort()");
state->errmsg = "called abort()";
}
return NULL;
}
@ -153,15 +151,8 @@ Value* AssertFn(const char* name, State* state, int argc, Expr* argv[]) {
int b = BooleanString(v);
free(v);
if (!b) {
int prefix_len;
int len = argv[i]->end - argv[i]->start;
char* err_src = reinterpret_cast<char*>(malloc(len + 20));
strcpy(err_src, "assert failed: ");
prefix_len = strlen(err_src);
memcpy(err_src + prefix_len, state->script + argv[i]->start, len);
err_src[prefix_len + len] = '\0';
free(state->errmsg);
state->errmsg = err_src;
state->errmsg = "assert failed: " + state->script.substr(argv[i]->start, len);
return NULL;
}
}
@ -279,8 +270,7 @@ Value* SequenceFn(const char* name, State* state, int argc, Expr* argv[]) {
Value* LessThanIntFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 2) {
free(state->errmsg);
state->errmsg = strdup("less_than_int expects 2 arguments");
state->errmsg = "less_than_int expects 2 arguments";
return NULL;
}
@ -314,8 +304,7 @@ Value* LessThanIntFn(const char* name, State* state, int argc, Expr* argv[]) {
Value* GreaterThanIntFn(const char* name, State* state,
int argc, Expr* argv[]) {
if (argc != 2) {
free(state->errmsg);
state->errmsg = strdup("greater_than_int expects 2 arguments");
state->errmsg = "greater_than_int expects 2 arguments";
return NULL;
}
@ -499,20 +488,12 @@ Value** ReadValueVarArgs(State* state, int argc, Expr* argv[]) {
return args;
}
static void ErrorAbortV(State* state, const char* format, va_list ap) {
std::string buffer;
android::base::StringAppendV(&buffer, format, ap);
free(state->errmsg);
state->errmsg = strdup(buffer.c_str());
return;
}
// Use printf-style arguments to compose an error message to put into
// *state. Returns nullptr.
Value* ErrorAbort(State* state, const char* format, ...) {
va_list ap;
va_start(ap, format);
ErrorAbortV(state, format, ap);
android::base::StringAppendV(&state->errmsg, format, ap);
va_end(ap);
return nullptr;
}
@ -520,8 +501,14 @@ Value* ErrorAbort(State* state, const char* format, ...) {
Value* ErrorAbort(State* state, CauseCode cause_code, const char* format, ...) {
va_list ap;
va_start(ap, format);
ErrorAbortV(state, format, ap);
android::base::StringAppendV(&state->errmsg, format, ap);
va_end(ap);
state->cause_code = cause_code;
return nullptr;
}
State::State(const std::string& script, void* cookie) :
script(script),
cookie(cookie) {
}

22
edify/expr.h
View file

@ -18,6 +18,7 @@
#define _EXPRESSION_H
#include <unistd.h>
#include <string>
#include "error_code.h"
#include "yydefs.h"
@ -26,20 +27,20 @@
typedef struct Expr Expr;
typedef struct {
struct State {
State(const std::string& script, void* cookie);
// The source of the original script.
const std::string& script;
// Optional pointer to app-specific data; the core of edify never
// uses this value.
void* cookie;
// The source of the original script. Must be NULL-terminated,
// and in writable memory (Evaluate may make temporary changes to
// it but will restore it when done).
char* script;
// The error message (if any) returned if the evaluation aborts.
// Should be NULL initially, will be either NULL or a malloc'd
// pointer after Evaluate() returns.
char* errmsg;
// Should be empty initially, will be either empty or a string that
// Evaluate() returns.
std::string errmsg;
// error code indicates the type of failure (e.g. failure to update system image)
// during the OTA process.
@ -50,8 +51,7 @@ typedef struct {
CauseCode cause_code = kNoCause;
bool is_retry = false;
} State;
};
#define VAL_STRING 1 // data will be NULL-terminated; size doesn't count null
#define VAL_BLOB 2

7
tests/component/edify_test.cpp
View file

@ -25,10 +25,7 @@ static void expect(const char* expr_str, const char* expected) {
int error_count;
EXPECT_EQ(parse_string(expr_str, &e, &error_count), 0);
State state;
state.cookie = nullptr;
state.errmsg = nullptr;
state.script = strdup(expr_str);
State state(expr_str, nullptr);
char* result = Evaluate(&state, e);
@ -38,8 +35,6 @@ static void expect(const char* expr_str, const char* expected) {
EXPECT_STREQ(result, expected);
}
free(state.errmsg);
free(state.script);
free(result);
}

41
updater/updater.cpp
View file

@ -14,22 +14,24 @@
* limitations under the License.
*/
#include "updater.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "edify/expr.h"
#include "updater.h"
#include "install.h"
#include "blockimg.h"
#include "minzip/Zip.h"
#include "minzip/SysUtil.h"
#include "config.h"
#include <android-base/strings.h>
#include <selinux/label.h>
#include <selinux/selinux.h>
#include "config.h"
#include "edify/expr.h"
#include "blockimg.h"
#include "install.h"
#include "minzip/Zip.h"
#include "minzip/SysUtil.h"
// Generated by the makefile, this function defines the
// RegisterDeviceExtensions() function, which calls all the
// registration functions for device-specific extensions.
@ -140,10 +142,7 @@ int main(int argc, char** argv) {
updater_info.package_zip_addr = map.addr;
updater_info.package_zip_len = map.length;
State state;
state.cookie = &updater_info;
state.script = script;
state.errmsg = NULL;
State state(script, &updater_info);
if (argc == 5) {
if (strcmp(argv[4], "retry") == 0) {
@ -160,22 +159,21 @@ int main(int argc, char** argv) {
}
if (result == NULL) {
if (state.errmsg == NULL) {
if (state.errmsg.empty()) {
printf("script aborted (no error message)\n");
fprintf(cmd_pipe, "ui_print script aborted (no error message)\n");
} else {
printf("script aborted: %s\n", state.errmsg);
char* line = strtok(state.errmsg, "\n");
while (line) {
printf("script aborted: %s\n", state.errmsg.c_str());
const std::vector<std::string> lines = android::base::Split(state.errmsg, "\n");
for (const std::string& line : lines) {
// Parse the error code in abort message.
// Example: "E30: This package is for bullhead devices."
if (*line == 'E') {
if (sscanf(line, "E%u: ", &state.error_code) != 1) {
printf("Failed to parse error code: [%s]\n", line);
if (!line.empty() && line[0] == 'E') {
if (sscanf(line.c_str(), "E%u: ", &state.error_code) != 1) {
printf("Failed to parse error code: [%s]\n", line.c_str());
}
}
fprintf(cmd_pipe, "ui_print %s\n", line);
line = strtok(NULL, "\n");
fprintf(cmd_pipe, "ui_print %s\n", line.c_str());
}
fprintf(cmd_pipe, "ui_print\n");
}
@ -189,7 +187,6 @@ int main(int argc, char** argv) {
}
}
free(state.errmsg);
return 7;
} else {
fprintf(cmd_pipe, "ui_print script succeeded: result was [%s]\n", result);